1
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Qiao B, Lin FY, Fu D, Li SJ, Zhang T, Lan Y. Mechanistic insights into facilitating reductive elimination from Ni(II) species. Chem Commun (Camb) 2024. [PMID: 39005163 DOI: 10.1039/d4cc02667e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Reductive elimination is a key step in Ni-catalysed cross-couplings, which is often considered to result in new covalent bonds. Due to the weak oxidizing ability of Ni(II) species, reductive eliminations from Ni(II) centers are challenging. A thorough mechanistic understanding of this process could inspire the rational design of Ni-catalysed coupling reactions. In this article, we give an overview of recent advances in the mechanistic study of reductive elimination from Ni(II) species achieved by our group. Three possible models for reductive elimination from Ni(II) species were investigated and discussed, including direct reductive elimination, electron density-controlled reductive elimination, and oxidation-induced reductive elimination. Notably, the direct reductive elimination from Ni(II) species often requires a high activation energy in some cases. In contrast, the electron density-controlled and oxidation-induced reductive elimination pathways can significantly enhance the driving force for reductive elimination, accelerating the formation of new covalent bonds. The intricate reaction mechanisms for each of these pathways are thoroughly discussed and systematically summarized in this paper. These computational studies showcase the characteristics of three models for reductive elimination from Ni(II) species, and we hope that it will spur the development of mechanistic studies of cross-coupling reactions.
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Affiliation(s)
- Bolin Qiao
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
| | - Fa-You Lin
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
| | - Dongmin Fu
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
| | - Shi-Jun Li
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
| | - Tao Zhang
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
- Institute of Intelligent Innovation, Henan Academy of Sciences, Zhengzhou, Henan, 451162, P. R. China.
| | - Yu Lan
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Chemical Theory and Mechanism, Chongqing University, Chongqing, 401331, P. R. China.
- Pingyuan Laboratory, Xinxiang, Henan, 453007, China
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2
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Ma YQ, Zhang M, Tian SK. Silyl Radical as an Isocyanide Transfer Agent for Giese-Type Reactions Involving Aliphatic Amines. Org Lett 2024; 26:5172-5176. [PMID: 38864545 DOI: 10.1021/acs.orglett.4c01706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Herein we report silyl radicals serve as isocyanide transfer agents for Giese-type reaction from aliphatic amines and electron-deficient olefins. α-Primary, α-secondary, and sterically encumbered α-tertiary primary amines could be easily converted into isocyanides for coupling with electron-deficient olefins by employing latent silyl radicals under visible light irradiation. Notably, the abstraction of silane-mediated isocyanide not only enables voltage-independent activation of strong C-N bonds but also represents a mechanistic alternative Giese-type reaction in which single electron reduction and protonation processes are replaced by direct hydrogen atom transfer. This transformation occurs under photoinduced catalyst-free conditions and exhibits excellent functional group compatibility and mild reaction conditions.
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Affiliation(s)
- Yu-Qing Ma
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Muliang Zhang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
| | - Shi-Kai Tian
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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3
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Jiao Z, Jaunich KT, Tao T, Gottschall O, Hughes MM, Turlik A, Schuppe AW. Unified Approach to Deamination and Deoxygenation Through Isonitrile Hydrodecyanation: A Combined Experimental and Computational Investigation. Angew Chem Int Ed Engl 2024; 63:e202405779. [PMID: 38619535 DOI: 10.1002/anie.202405779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/13/2024] [Accepted: 04/15/2024] [Indexed: 04/16/2024]
Abstract
Herein, we describe a general hydrodefunctionalization protocol of alcohols and amines through a common isonitrile intermediate. To cleave the relatively inert C-NC bond, we leveraged dual hydrogen atom transfer (HAT) and photoredox catalysis to generate a nucleophilic boryl radical, which readily forms an imidoyl radical intermediate from the isonitrile. Rapid β-scission then accomplishes defunctionalization. This method has been applied to the hydrodefunctionalization of both amine and alcohol-containing pharmaceuticals, natural products, and biomolecules. We extended this approach to the reduction of carbonyls and olefins to their saturated counterparts, as well as the hydrodecyanation of alkyl nitriles. Both experimental and computational studies demonstrate a facile β-scission of the imidoyl radical, and reconcile differences in reactivity between nitriles and isonitriles within our protocol.
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Affiliation(s)
- Ziqi Jiao
- Department of Chemistry, Vanderbilt University, 1234 Stevenson Center Ln, Nashville, TN, 37240, USA
| | - Kyle T Jaunich
- Department of Chemistry, Vanderbilt University, 1234 Stevenson Center Ln, Nashville, TN, 37240, USA
| | - Thomas Tao
- Department of Chemistry, Skidmore College, 815 North Broadway, Saratoga Springs, NY, 12866, USA
| | - Olivia Gottschall
- Department of Chemistry, Skidmore College, 815 North Broadway, Saratoga Springs, NY, 12866, USA
| | - Maxwell M Hughes
- Department of Chemistry, Vanderbilt University, 1234 Stevenson Center Ln, Nashville, TN, 37240, USA
| | - Aneta Turlik
- Department of Chemistry, Skidmore College, 815 North Broadway, Saratoga Springs, NY, 12866, USA
| | - Alexander W Schuppe
- Department of Chemistry, Vanderbilt University, 1234 Stevenson Center Ln, Nashville, TN, 37240, USA
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4
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Biswas S, Roy A, Duari S, Maity S, Elsharif AM, Biswas S. Brønsted acid-catalyzed regioselective ring opening of 2 H-azirines by 2-mercaptopyridines and related heterocycles; one pot access to imidazo[1,2- a]pyridines and imidazo[2,1- b]thiazoles. Org Biomol Chem 2024; 22:4697-4703. [PMID: 38775270 DOI: 10.1039/d4ob00410h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
A catalytic and versatile synthetic method for the synthesis of imidazo[1,2-a]pyridines has been developed. Brønsted acid-catalysis plays a major role in the regioselective ring opening of 2H-azirines. Nucleophilic attack via the N-centre of mercaptopyridines and their analogues, followed by cyclisation by cleaving the C-S bond, allowed a library of imidazo[1,2-a]pyridines and related heterocycles to be built. The reaction protocol has been applied to various 2H-azirines, 2-mercaptopyridines, and thiazole-2-thiols, illustrating the generality of reaction conditions. The practical applications include the synthesis of pharmaceuticals, such as anti-tumor agents. This study introduces a novel approach to the synthesis of functional molecules with extensive potential.
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Affiliation(s)
- Subrata Biswas
- Dept. of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata - 700 009, West Bengal, India.
| | - Arnab Roy
- Dept. of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata - 700 009, West Bengal, India.
| | - Surajit Duari
- Dept. of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata - 700 009, West Bengal, India.
| | - Srabani Maity
- Dept. of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata - 700 009, West Bengal, India.
| | - Asma M Elsharif
- Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Srijit Biswas
- Dept. of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata - 700 009, West Bengal, India.
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5
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Su J, Guo Y, Li C, Song Q. Difluorocarbene-induced [1,2]- and [2,3]-Stevens rearrangement of tertiary amines. Nat Commun 2024; 15:4794. [PMID: 38839757 PMCID: PMC11153565 DOI: 10.1038/s41467-024-49054-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 05/23/2024] [Indexed: 06/07/2024] Open
Abstract
The [1,2]- and [2,3]-Stevens rearrangements are one of the most fascinating chemical bond reorganization strategies in organic chemistry, and they have been demonstrated in a wide range of applications, representing a fundamental reaction tactic for the synthesis of nitrogen compounds in chemical community. However, their applicabilities are limited by the scarcity of efficient, general, and straightforward methods for generating ammonium ylides. Herein, we report a general difluorocarbene-induced tertiary amine-involved [1,2]- and [2,3]-Stevens rearrangements stemmed from in situ generated difluoromethyl ammonium ylides, which allows for the rearrangements of versatile tertiary amines bearing either allyl, benzyl, or propargyl groups, resulting in the corresponding products in one reaction under the same reaction conditions with a general way. Broad substrate scope, simple operation, mild reaction conditions and late-stage modification of natural products highlight the advantages of this strategy, meanwhile, this general rearrangement reaction is believed to bring opportunities for the transformations of nitrogen ylides and the assembly of valuable tertiary amines and amino acids. This will further enrich the reaction repertoire of difluorocarbene species, facilitate the development of reactions involving difluoromethyl ammonium salts, and provide an avenue for the development of this type of rearrangement reactions.
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Affiliation(s)
- Jianke Su
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Yu Guo
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Chengbo Li
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering, Huaqiao University, Xiamen, Fujian, 361021, China.
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China.
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China.
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China.
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6
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Wang S, Zheng N, Deji C, Hu Q, Wu X, Zhan R, Huang H, Zhang Y. Visible-Light-Promoted [4π + 2σ] Annulation of Dienes and Alkylamines via Dual Inert C(sp 3)-H Bond Activation. Org Lett 2024. [PMID: 38781570 DOI: 10.1021/acs.orglett.4c01470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Herein, visible-light-promoted [4π + 2σ] annulation of dienes and alkylamines was achieved via dual C(sp3)-H bond functionalization of alkylamines. The elusive enamine precursors are generated under mild conditions by photoredox catalysis, efficiently annulated by the diene, and simultaneously functionalized with two aliphatic C(sp3)-H bonds, resulting in the productive synthesis of new aromatic rings. The aromatic ring construction provides direct access to 2-hydroxybenzophenone derivatives in high yields (up to 90%). This [4π + 2σ] annulation reaction demonstrates mild reaction conditions, high reaction efficiency, and broad functional group tolerance, and this synthetic protocol has been made available for the late-stage transformation of natural products and commercial drugs.
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Affiliation(s)
- Shuzhong Wang
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People's Republic of China
| | - Nuowen Zheng
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People's Republic of China
| | - Cuo Deji
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People's Republic of China
| | - Qingzhong Hu
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People's Republic of China
| | - Xinxin Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, China
| | - Ruoting Zhan
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People's Republic of China
| | - Huicai Huang
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People's Republic of China
| | - Yue Zhang
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, People's Republic of China
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7
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Qin H, Han Z, Bonku EM, Sun H, Odilov A, Zhu F, Abduahadi S, Zhu W, Shen J, Aisa HA. Direct esterification of amides by the dimethylsulfate-mediated activation of amide C-N bonds. Commun Chem 2024; 7:93. [PMID: 38678046 PMCID: PMC11055851 DOI: 10.1038/s42004-024-01180-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 04/16/2024] [Indexed: 04/29/2024] Open
Abstract
Amides are important intermediates in organic chemistry and the pharmaceutical industry, but their low reactivity requires catalysts and/or severe reaction conditions for esterification. Here, a novel approach was devised to convert amides into esters without the use of transition metals. The method effectively overcomes the inherent low reactivity of amides by employing dimethylsulfate-mediated reaction to activate the C-N bonds. To confirm the proposed reaction mechanism, control experiments and density functional theory (DFT) calculations were conducted. The method demonstrates a wide array of substrates, including amides with typical H/alkyl/aryl substitutions, N,N-disubstituted amides, amides derived from alkyl, aryl, or vinyl carboxylic acids, and even amino acid substrates with stereocentres. Furthermore, we have shown the effectiveness of dimethylsulfate in removing acyl protective groups in amino derivatives. This study presents a method that offers efficiency and cost-effectiveness in broadening the esterification capabilities of amides, thereby facilitating their increased utilization as synthetic compounds in diverse transformations.
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Affiliation(s)
- Hongjian Qin
- Key Laboratory of Plant Resources and Chemistry in Arid Regions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, Xinjiang, PR China
- University of Chinese Academy of Sciences, Beijing, PR China
| | - Zijian Han
- University of Chinese Academy of Sciences, Beijing, PR China
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Emmanuel Mintah Bonku
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Haiguo Sun
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Abdullajon Odilov
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Fuqiang Zhu
- Topharman Shanghai Co., Ltd., Shanghai, PR China
| | - Safomuddin Abduahadi
- University of Chinese Academy of Sciences, Beijing, PR China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China
| | - Weiliang Zhu
- University of Chinese Academy of Sciences, Beijing, PR China.
- CAS Key Laboratory of Receptor Research, State Key Laboratory of Drug Research, Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China.
| | - Jingshan Shen
- University of Chinese Academy of Sciences, Beijing, PR China.
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, PR China.
| | - Haji A Aisa
- Key Laboratory of Plant Resources and Chemistry in Arid Regions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, Xinjiang, PR China.
- University of Chinese Academy of Sciences, Beijing, PR China.
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8
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Xu X, Zhu YK, Dai CM, Xu J, Jian J. Synthesis and characterization of azaborepin radicals in solid neon through boron-mediated C-N bond cleavage of pyridine. Phys Chem Chem Phys 2024; 26:11048-11055. [PMID: 38528841 DOI: 10.1039/d4cp00228h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
The reactivity of pyridine is a complex topic due to its unique electronic structure. The reactions of atomic boron with pyridine molecules in solid neon have been investigated using matrix isolation infrared absorption spectroscopy. Three products (marked as A, B, and C) were observed and characterized through 10B, D and 15N isotopic substitution pyridine regents as well as quantum chemical calculations. In the reaction, the ground-state boron atom can attack the lone pair electrons of the nitrogen atom in the pyridine molecule, resulting in the formation of a 1-boropyridinyl radical (A). Alternatively, addition to the aromatic π-system of pyridine can occur in a [1,4] type, leading to the formation of a B[η2(1,4)-C5H5N] complex (B). Under UV-visible light (280 < λ < 580 nm) irradiation, these two compounds can further undergo photo-isomerization to form BN-embedded seven-membered azaborepin compounds (C). The observation of species A, B, and the subsequent photo-isomerization to species C is consistent with theoretical predictions, indicating that these reactions are kinetically favorable. This research provides valuable insights into the future design and synthesis of corresponding BN heterocyclic derivatives.
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Affiliation(s)
- Xin Xu
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou, Zhejiang, 311231, China.
| | - Yi-Kang Zhu
- Xiaoshan Campus, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou, Zhejiang, 311231, China
| | - Chuan-Ming Dai
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou, Zhejiang, 311231, China.
| | - Jiaping Xu
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou, Zhejiang, 311231, China.
| | - Jiwen Jian
- Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou, Zhejiang, 311231, China.
- Xiaoshan Campus, Zhejiang Normal University, 1108 Gengwen Road, Hangzhou, Zhejiang, 311231, China
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9
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Gao Y, Hu Y, Ye J, Ma Z, Feng J, Liu X, Lei P, Szostak M. Pd-NHC (NHC = N-Heterocyclic Carbene)-Catalyzed B-Alkyl Suzuki Cross-Coupling of 2-Pyridyl Ammonium Salts by N-C Activation: Application to the Discovery of Agrochemical Molecular Hybrids. Org Lett 2024; 26:2309-2314. [PMID: 38466078 DOI: 10.1021/acs.orglett.4c00549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
2-Alkylpyridines are a privileged scaffold throughout the realm of organic synthesis and play a key role in natural products, pharmaceuticals, and agrochemicals. Herein, we report the first B-alkyl Suzuki cross-coupling of 2-pyridyl ammonium salts to access functionalized 2-alkylpyridines. The use of well-defined, operationally simple Pd-NHCs permits for an exceptionally broad scope of the challenging B-alkyl C-N cross-coupling with organoboranes containing β-hydrogen, representing a novel method for the discovery of highly sought-after molecules for plant protection.
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Affiliation(s)
- Yanqing Gao
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yuge Hu
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jiuhui Ye
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhiqing Ma
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Juntao Feng
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xili Liu
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Peng Lei
- Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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10
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Zhang X, Cui S, Wei S, Zhao M, Liu X, Zhang G. Nickel-Catalyzed Deaminative Alkyl-Alkyl Cross-Coupling of Katritzky Salts with Cyclopropanols: Merging C-N and C-C Bond Activation. Org Lett 2024; 26:2114-2118. [PMID: 38437731 DOI: 10.1021/acs.orglett.4c00424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
Herein, we report a general and practical nickel-catalyzed deaminative alkylation of Katritzky salts with cyclopropyl alcohols via merging C-N and C-C bond activation. This protocol enables the formation of an alkyl-alkyl bond along with the generation of a versatile ketone functional group in a single operation, thus providing a convenient approach for accessing β-alkyl ketones. This reaction is distinguished by its high functional group tolerance, broad substrate scope, and efficient late-stage derivatization of complex bioactive molecules.
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Affiliation(s)
- Xingjie Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Shilin Cui
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Shuxin Wei
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Mengge Zhao
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Xiaopan Liu
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Guisheng Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
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11
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Zhang X, Su W, Guo H, Fang P, Yang K, Song Q. N-Heterocycle-Editing to Access Fused-BN-Heterocycles via Ring-Opening/C-H Borylation/Reductive C-B Bond Formation. Angew Chem Int Ed Engl 2024; 63:e202318613. [PMID: 38196396 DOI: 10.1002/anie.202318613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/11/2024]
Abstract
Skeletal editing of N-heterocycles has recently received considerable attention, and the introduction of boron atom into heterocycles often results in positive property changes. However, direct enlargement of N-heterocycles through boron atom insertion is rarely reported in the literature. Here, we report a N-heterocyclic editing reaction through the combination boron atom insertion and C-H borylation, accessing the fused-BN-heterocycles. The synthetic potential of this chemistry was demonstrated by substrate scope and late-stage diversification of products.
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Affiliation(s)
- Xu Zhang
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Wanlan Su
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Huosheng Guo
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Pengyuan Fang
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Kai Yang
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
| | - Qiuling Song
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian, 350108, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007, China
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12
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Yan X, Yu B, Liu H, Huang H. Intramolecular Carboamination of Aminodienes to N-Heterocycles via C-N Bond Activation. Angew Chem Int Ed Engl 2024; 63:e202316563. [PMID: 38185992 DOI: 10.1002/anie.202316563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/09/2024]
Abstract
The catalytic transformation of ubiquitous but inert C-N bonds is highly appealing in synthetic chemistry, but the efficient cleaving inert C-N bond and simultaneous incorporation of both the cleaved C-moiety and N-moiety into the desired products has been a long-standing formidable challenge so far. Here, we developed a radical-addition triggered cyclization and C-N bond cleavage process enabled by the unique I2 /Ni or benzyl halide/Ni-catalytic system, allowing the formal insertion of diene into the inert C-N bond. This reaction features high atom economy and enables an expedient annulative carboamination of aminodienes to diverse pyrrolidines, piperidines, and tetrahydroisoquinolines. Mechanistic studies have revealed that the reaction is initiated via the generation of a benzyl radical and the formation of quaternary ammonium salt is key for the C-N bond cleavage.
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Affiliation(s)
- Xuyang Yan
- Key Laboratory of Precision and Intelligent Chemistry, and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Bangkui Yu
- Key Laboratory of Precision and Intelligent Chemistry, and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Hongchi Liu
- Key Laboratory of Precision and Intelligent Chemistry, and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Hanmin Huang
- Key Laboratory of Precision and Intelligent Chemistry, and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, Huaibei Normal University, Huaibei, 235000, P. R. China
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13
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Xue JH, Li Y, Liu Y, Li Q, Wang H. Site-Specific Deaminative Trifluoromethylation of Aliphatic Primary Amines. Angew Chem Int Ed Engl 2024; 63:e202319030. [PMID: 38179851 DOI: 10.1002/anie.202319030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/02/2024] [Accepted: 01/03/2024] [Indexed: 01/06/2024]
Abstract
The introduction of trifluoromethyl groups into organic molecules is of paramount importance in modern synthetic chemistry and medicinal chemistry. While methods for constructing C(sp2 )-CF3 bonds have been well established, the advancement of practical and comprehensive approaches for forming C(sp3 )-CF3 bonds remains considerably restricted. In this work, we describe an efficient and site-specific deaminative trifluoromethylation reaction of aliphatic primary amines to afford the corresponding alkyl trifluoromethyl compounds. The reaction proceeds at room temperature with readily accessible N-anomeric amide (Levin's reagent) and bench-stable bpyCu(CF3 )3 (Grushin's reagent, bpy=2,2'-bipyridine) under blue light. The protocol features mild reaction conditions, good functional group tolerance, and moderate to good yields. Remarkably, the method can be applied to the direct, late-stage trifluoromethylation of natural products and bioactive molecules. Experimental mechanistic studies were conducted, and a radical mechanism is proposed, wherein the dual roles of Grushin's reagent have been elucidated.
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Affiliation(s)
- Jiang-Hao Xue
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Yin Li
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Yuan Liu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Qingjiang Li
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Honggen Wang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
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14
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Marchese AD, Dorsheimer JR, Rovis T. Photoredox-Catalyzed Generation of Tertiary Anions from Primary Amines via a Radical Polar Crossover. Angew Chem Int Ed Engl 2024; 63:e202317563. [PMID: 38189622 PMCID: PMC10873470 DOI: 10.1002/anie.202317563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Indexed: 01/09/2024]
Abstract
A method for the generation of tertiary carbanions via a deaminative radical-polar crossover is reported using redox active imines from α-tertiary primary amines. A variety of benzylic amines and amino esters can be used in this approach, with the latter engaging in a novel "aza-Reformatsky" reaction. Electronic trends correlate the stability of the resulting carbanion with reaction efficiency. The anions can be trapped with different electrophiles including aldehydes, ketones, imines, Michael acceptors, and H2 O/D2 O. Selective anion formation can be achieved in the presence of another equivalent or more acidic C-H bond in both an inter- and intramolecular fashion. Mechanistic studies suggest the intermediacy of a discrete carbanion intermediate.
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Affiliation(s)
- Austin D. Marchese
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Julia R. Dorsheimer
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Tomislav Rovis
- Department of Chemistry, Columbia University, New York, New York 10027, United States
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15
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Zhang H, Li M, Wang K, Chen Y, Liao B, Wang Q, Yi W. An Accesss to 4,5,6-Trisubstituted Pyrimidines from 2 H-Azirines and α-Isocyanoacetates or α-Isocyanoacetamides Enabled by 1,3-Dipolar [3 + 2] Cycloaddition/Ring-Expanding/Oxidative Aromatization Process. J Org Chem 2024; 89:1692-1702. [PMID: 38207341 DOI: 10.1021/acs.joc.3c02378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
The products containing pyrimidine scaffolds exhibit various important physiological and biological activities. To date, the strategies to generate 4,5,6-trisubstituted pyrimidines were not reported. Here, a copper-catalyzed reaction of 2H-azirines with α-isocyanoacetates or α-isocyanoacetamides has been developed, rapidly preparing 4,5,6-trisubstituted pyrimidines. The mechanistic results reveal that this strategy underwent a formal 1, 3-dipolar [3 + 2] cycloaddition/ring-expanding/oxidative aromatization procedure to construct the desired pyrimidines.
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Affiliation(s)
- Haoxiang Zhang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Mengfan Li
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Kunpeng Wang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Yan Chen
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Benren Liao
- Shanghai No.4 Reagent Chemical Co., Ltd. Shanghai 201512, P. R. China
| | - Qingwei Wang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Weiyin Yi
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
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16
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Zhao MN, Yang ZM, Li LQ. DMF as an amine source: iron-catalyzed cyclization of 2 H-azirines to imidazoles. Chem Commun (Camb) 2024. [PMID: 38258986 DOI: 10.1039/d3cc06147g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
A novel method has been developed for the synthesis of 1-methyl-4,5-diaryl-1H-imidazoles through Fe(II)-catalyzed cyclization of 2H-azirines and N,N-dimethylformamide (DMF) as an amine source. This transformation involves the cleavage of C-N and CN double bonds and the construction of new C-N and CN double bonds. The reaction has readily available starting materials, a wide range of substrates and mild reaction conditions. In addition, the reaction also facilitated the convenient synthesis of 1-methyl-2,4,5-triaryl-1H-imidazoles.
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Affiliation(s)
- Mi-Na Zhao
- College of Chemistry and Chemical Engineering, Shaanxi Xueqian Normal University, Xi'an, Shaanxi 710100, P. R. China.
| | - Zi-Mo Yang
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji, Shaanxi 721013, P. R. China
| | - Lian-Qing Li
- College of Chemistry and Chemical Engineering, Shaanxi Xueqian Normal University, Xi'an, Shaanxi 710100, P. R. China.
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17
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Bhavyesh D, Soliya S, Konakanchi R, Begari E, Ashalu KC, Naveen T. The Recent Advances in Iron-Catalyzed C(sp 3 )-H Functionalization. Chem Asian J 2023:e202301056. [PMID: 38149480 DOI: 10.1002/asia.202301056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 12/28/2023]
Abstract
The use of iron as a core metal in catalysis has become a research topic of interest over the last few decades. The reasons are clear. Iron is the most abundant transition metal on Earth's crust and it is widely distributed across the world. It has been extracted and processed since the dawn of civilization. All these features render iron a noncontaminant, biocompatible, nontoxic, and inexpensive metal and therefore it constitutes the perfect candidate to replace noble metals (rhodium, palladium, platinum, iridium, etc.). Moreover, direct C-H functionalization is one of the most efficient strategies by which to introduce new functional groups into small organic molecules. The majority of organic compounds contain C(sp3 )-H bonds. Given the enormous importance of organic molecules in so many aspects of existence, the utilization and bioactivity of C(sp3 )-H bonds are of the utmost importance. This review sheds light on the substrate scope, selectivity, benefits, and limitations of iron catalysts for direct C(sp3 )-H bond activations. An overview of the use of iron catalysis in C(sp3 )-H activation protocols is summarized herein up to 2022.
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Affiliation(s)
- Desai Bhavyesh
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology Surat, Gujarat, 395 007, India
| | - Sudha Soliya
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology Surat, Gujarat, 395 007, India
| | - Ramaiah Konakanchi
- Department of Chemistry, VNR Vignana Jyoti Institute of Engineering and Technology, Hyderabad, 500090, India
| | - Eeshwaraiah Begari
- School of Applied Material Sciences, Central University of Gujarat, Gandhinagar, 382030, India
| | - Kashamalla Chinna Ashalu
- Department of Chemistry, School of Science, Indrashil University, Rajpur, Kadi, Gujarat, 382715, India
| | - Togati Naveen
- Department of Chemistry, Sardar Vallabhbhai National Institute of Technology Surat, Gujarat, 395 007, India
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18
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Zhang M, Tang ZL, Luo H, Wang XC. β-C-H Allylation of Trialkylamines with Allenes Promoted by Synergistic Borane/Palladium Catalysis. Angew Chem Int Ed Engl 2023:e202317610. [PMID: 38095883 DOI: 10.1002/anie.202317610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Indexed: 12/29/2023]
Abstract
Functionalization of the C(sp3 )-H bonds of trialkylamines is challenging, especially for reactions at positions other than the α position. Herein, we report a method for β-C(sp3 )-H allylation of trialkylamines. In these reactions, which involve synergistic borane/palladium catalysis, an enamine intermediate is first generated from the amine via α,β-dehydrogenation promoted by B(C6 F5 )3 and a base, and then the enamine undergoes palladium-catalyzed reaction with an allene to give the allylation product. Because the hydride and the proton resulting from the initial dehydrogenation are ultimately shuttled to the product by B(C6 F5 )3 and the palladium catalyst, respectively, these reactions show excellent atom economy. The establishment of this method paves the way for future studies of C-H functionalization of trialkylamines by means of synergistic borane/transition-metal catalysis.
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Affiliation(s)
- Ming Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Zi-Lu Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Heng Luo
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
| | - Xiao-Chen Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin, 300071, China
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19
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Linde E, Olofsson B. Synthesis of Complex Diarylamines through a Ring-Opening Difunctionalization Strategy. Angew Chem Int Ed Engl 2023; 62:e202310921. [PMID: 37847128 DOI: 10.1002/anie.202310921] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 10/13/2023] [Accepted: 10/17/2023] [Indexed: 10/18/2023]
Abstract
The diarylation and skeletal diversification of unstrained cyclic amines was exploited to expand and modify the favorable properties of this important substrate class with pivotal roles in drug discovery. Cyclic amines were employed in the synthesis of a novel class of amino-substituted diaryliodonium salts, which were converted to highly functionalized diarylamines through an atom-efficient one-pot N-arylation/ring opening reaction with external nucleophiles. The reaction proceeds through in situ formation of a diarylammonium intermediate that undergoes a nucleophilic ring opening by cleavage of the strong C-N bond. A wide variety of diarylamines was obtained through introduction of two different aryl groups of varied electronics, and the retained iodo-substituent enables downfield diversifications of the products. More than 20 nucleophiles, including amines, phenols, carboxylic acids, thiols and halides, were alkylated with high functional group tolerance, and the strategy proved efficient also in in late-stage functionalization of natural products and pharmaceuticals.
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Affiliation(s)
- Erika Linde
- Department of Organic Chemistry Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden
| | - Berit Olofsson
- Department of Organic Chemistry Arrhenius Laboratory, Stockholm University, 106 91, Stockholm, Sweden
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20
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Liang JY, Su YW, Zou YQ. Photochemical reductive deamination of alpha-amino aryl alkyl ketones. Chem Commun (Camb) 2023. [PMID: 37997158 DOI: 10.1039/d3cc04837c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Photochemical reductive deamination of alpha-amino aryl alkyl ketones under photosensitizer-free conditions is presented. This protocol features high efficiency and selectivity. A plausible reaction pathway is proposed based on ultraviolet-visible absorption investigation, control experiments and deuterium-labelling studies. Mechanistic study reveals that the alpha-hydrogen atom of the ketone product originated from water.
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Affiliation(s)
- Ji-Yuan Liang
- Department of Otolaryngology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430071, China.
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University, Wuhan, Hubei 430071, China
- TaiKang Center for Life and Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China
| | - Yi-Wen Su
- Department of Otolaryngology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430071, China.
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University, Wuhan, Hubei 430071, China
- TaiKang Center for Life and Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China
| | - You-Quan Zou
- Department of Otolaryngology, Zhongnan Hospital of Wuhan University, School of Pharmaceutical Sciences, Wuhan University, Wuhan, Hubei 430071, China.
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University, Wuhan, Hubei 430071, China
- TaiKang Center for Life and Medical Sciences, Wuhan University, Wuhan, Hubei 430071, China
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21
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Roy A, Biswas S, Duari S, Maity S, Mishra AK, Souza ARD, Elsharif AM, Morgon NH, Biswas S. Regioselective Transition Metal-Free Catalytic Ring Opening of 2 H-Azirines by Phenols and Naphthols; One-Pot Access to Benzo- and Naphthofurans. J Org Chem 2023; 88:15580-15588. [PMID: 37933871 DOI: 10.1021/acs.joc.3c01266] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Benzofuran and naphthofuran derivatives are synthesized from readily available phenols and naphthols. Regioselective ring openings of 2H-azirine followed by in situ aromatization using a catalytic amount of Brønsted acid have established the novelty of the methodology. The involvement of a series of 2H-azirines with a variety of phenols, 1-naphthols, and 2-naphthols showed the generality of the protocol. In-depth density functional theory calculations revealed the reaction mechanism with the energies of the intermediates and transition states of a model reaction. An alternate pathway of the mechanism has also been proposed with computer modeling.
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Affiliation(s)
- Arnab Roy
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, West Bengal, India
| | - Subrata Biswas
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, West Bengal, India
| | - Surajit Duari
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, West Bengal, India
| | - Srabani Maity
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, West Bengal, India
| | - Abhishek Kumar Mishra
- Department of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow 226031, Uttar Pradesh, India
| | - Aguinaldo R de Souza
- Department of Chemistry, School of Science, São Paulo State University, Bauru 17033-360, São Paulo, Brazil
| | - Asma M Elsharif
- Department of Chemistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Nelson H Morgon
- Department of Physical Chemistry, Institute of Chemistry, Campinas State University, Campinas 13083-970, São Paulo, Brazil
| | - Srijit Biswas
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, West Bengal, India
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22
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Qin H, Guo T, Lin K, Li G, Lu H. Synthesis of dienes from pyrrolidines using skeletal modification. Nat Commun 2023; 14:7307. [PMID: 37951966 PMCID: PMC10640553 DOI: 10.1038/s41467-023-43238-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 11/03/2023] [Indexed: 11/14/2023] Open
Abstract
Saturated N-heterocyclic pyrrolidines are common in natural products, medicinal compounds and agrochemicals. However, reconstruction of their skeletal structures creating new chemical space is a challenging task, and limited methods exist for this purpose. In this study, we report a skeletal modification strategy for conversion of polar cyclic pyrrolidines into nonpolar linear dienes through a N-atom removal and deconstruction process. This involves N-sulfonylazidonation followed by rearrangement of the resulting sulfamoyl azide intermediates. This can be an energetically unfavorable process, which involves the formation of active C-C π bonds, the consumption of inert C-N and C-C σ bonds and the destruction of stable five-membered rings, but we have used it here to produce versatile conjugated and nonconjugated dienes with links of varying lengths. We also studied the application of this method in late-stage skeletal modification of bioactive compounds, formal traceless C(sp2)-H functionalization and formal N-atom deletion.
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Affiliation(s)
- Haitao Qin
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Ting Guo
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Ken Lin
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Guigen Li
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
| | - Hongjian Lu
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
- The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Normal University, Wuhu, Anhui, 241000, China.
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23
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Long L, Wang W, Zhu Y, Luo W, Zhang Y, Chen J, Wei Y, Chen Z. Benzannulation with Et 3N as 1,3-Diene Variants. Org Lett 2023; 25:7775-7779. [PMID: 37874959 DOI: 10.1021/acs.orglett.3c02620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
With triethylamine as a 1,3-diene variant, a simple and practical process for the synthesis of phthalimides has been developed from readily available maleimide. The transformation can be performed in the absence of a metal catalyst with high levels of functional group tolerance. Various phthalimide compounds were constructed in moderate to good yields under mild conditions. Mechanism research indicates that oxygen and acid also play crucial roles in this reaction.
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Affiliation(s)
- Lipeng Long
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, PR China
| | - Wenjia Wang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, PR China
| | - Yuping Zhu
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, PR China
| | - Wenjun Luo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, PR China
| | - Yi Zhang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, PR China
| | - Juxiu Chen
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, PR China
| | - Yuting Wei
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, PR China
| | - Zhengwang Chen
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, PR China
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24
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Kogure Y, Hatakeyama K, Tsuchiya K, Kunii Y, Ueno S. Ruthenium-catalysed cross-coupling reaction of ketones with transformable directing groups as alkenyl electrophiles. Chem Commun (Camb) 2023; 59:12463-12466. [PMID: 37782067 DOI: 10.1039/d3cc04265k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Herein, we report the development of ruthenium-catalysed cross-coupling reaction of β-ketoamides as alkenyl electrophiles with organoboronates. This reaction presumably proceeds via the cleavage of the alkenyl C-N bond of the β-enaminoamide, which is generated in situ from the β-ketoamide and pyrrolidine, and is promoted by a nearby amide directing group and a ruthenium catalyst.
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Affiliation(s)
- Yuya Kogure
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan.
| | - Kohei Hatakeyama
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan.
| | - Kai Tsuchiya
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan.
| | - Yuta Kunii
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan.
| | - Satoshi Ueno
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Technology, Hachioji, Tokyo 192-0982, Japan.
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25
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Li D, Shen C, Si Z, Liu L. Palladium-Catalyzed Fluorinative Bifunctionalization of Aziridines and Azetidines with gem-Difluorocyclopropanes. Angew Chem Int Ed Engl 2023; 62:e202310283. [PMID: 37572320 DOI: 10.1002/anie.202310283] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/08/2023] [Accepted: 08/12/2023] [Indexed: 08/14/2023]
Abstract
An unprecedented Pd-catalyzed fluorinative bifunctionalization of aziridines and azetidines was successfully developed via regioselective C-C and C-F bond cleavage of gem-difluorocyclopropanes, leading to various β,β'-bisfluorinated amines and β,γ-bisfluorinated amines. This reaction was achieved by incorporating a 2-fluorinated allyl group and a fluorine atom scissored from gem-difluorocyclopropane in 100 % atom economy for the first time. The mechanistic investigations indicated that the reaction underwent amine attacking 2-fluorinated allyl palladium complex to generate η2 -coordinated N-allyl aziridine followed by fluoride ligand transfer affording the final β- and γ-fluorinated amines.
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Affiliation(s)
- Dongdong Li
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Chaoren Shen
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Zhiyao Si
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Lu Liu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, 3663N Zhongshan Road, Shanghai, 200062, China
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26
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Chiang CW, Li HL, Lin TJ, Chen HC, Chou YH, Chou CJ. Versatile Synthesis of Symmetric and Unsymmetric Imines via Photoelectrochemical Catalysis: Application to N-Terminal Modification of Phenylalanine. Chemistry 2023; 29:e202301379. [PMID: 37434348 DOI: 10.1002/chem.202301379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/21/2023] [Accepted: 07/11/2023] [Indexed: 07/13/2023]
Abstract
A strategy that combines electrochemical synthesis and photoredox catalysis was reported for the efficient synthesis of imines. This approach was demonstrated to be highly versatile in producing various types of imines, including symmetric and unsymmetric imines, by exploring the impact of different substituents on the benzene ring of the arylamine. Additionally, the method was specifically applied to modify N-terminal phenylalanine residues and was found to be successful in the photoelectrochemical cross-coupling reaction between NH2 -Phe-OMe and aryl methylamines, leading to the synthesis of phenylalanine-containing imines. Therefore, this technique would present a convenient and efficient platform for synthesizing imines, with promising applications in chemical biology, drug development, and organic synthesis.
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Affiliation(s)
- Chien-Wei Chiang
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
| | - Hung-Li Li
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
| | - Ting-Jun Lin
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
| | - Hung-Chi Chen
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
| | - Yi-Hsien Chou
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
| | - Chih-Ju Chou
- Department of Chemistry, Soochow University, No.70, Linhsi Road, Shihlin District, Taipei, 111002, Taiwan
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27
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Chen J, Jiang S, Shi W, Jiang P, Liu X, Huang H, Deng GJ. Three-Component Ring-Expansion Reaction of Indoles Leading to Synthesis of Pyrrolo[2,3- c]quinolines. Org Lett 2023; 25:6886-6890. [PMID: 37676779 DOI: 10.1021/acs.orglett.3c02581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
Herein, we have developed an atom- and step-economic three-component cascade reaction that enables a modular platform for the synthesis of pyrrolo[2,3-c]quinoline compounds through ring-expansion/cyclization by way of novel N1-C2 cleavage of indoles. The metal-free catalytic system exhibits a broad functional group tolerance.
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Affiliation(s)
- Jinjin Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang 421001, China
| | - Shuxin Jiang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Weiliang Shi
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Pingyu Jiang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Xinping Liu
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang 421001, China
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guo-Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
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28
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Gao Q, Luo L, Chen C, Wen K, Zhu Z, Tang X. Transition-Metal-Free Base-Promoted Deaminative Coupling of Gramines with Aminomaleimides. J Org Chem 2023; 88:13303-13314. [PMID: 37668535 DOI: 10.1021/acs.joc.3c01610] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
The direct utilization of amines for C-C bond formation without prefunctionalization remains a significant challenge. Herein, we report the base-promoted deaminative coupling of gramines with aminomalaimides under redox-neutral conditions. In this operationally simple reaction, a series of indolmethyl-substituted aminomaleimides that emitted fluorescence were synthesized in good-to-excellent yields. Biological evaluation revealed that some products exhibited antiproliferative activity against human cancer cell lines.
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Affiliation(s)
- Qiwen Gao
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, China
| | - Liuting Luo
- Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, 13# Shiliugang Road, Haizhu district, Guangzhou 510315, China
| | - Chen Chen
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, China
| | - Kangmei Wen
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, China
| | - Zhibo Zhu
- Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, 13# Shiliugang Road, Haizhu district, Guangzhou 510315, China
| | - Xiaodong Tang
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1023 South Shatai Road, Baiyun District, Guangzhou 510515, China
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29
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Liu S, Wang SL, Wan J, Peng S, Zhang JR, Ding HJ, Zhang B, Ni HL, Cao P, Hu P, Wang BQ, Chen B. Nickel-Catalyzed Reductive Cross-Coupling of Aziridines and Allylic Chlorides. Org Lett 2023; 25:6582-6586. [PMID: 37642345 DOI: 10.1021/acs.orglett.3c02399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
A nickel-catalyzed reductive cross-coupling of aziridines and allylic chlorides was realized by using manganese metal as the reducing agent. This protocol afforded a convenient approach to obtain β-allyl-substituted arylethylamines bearing various functional groups. The utility of this reaction was also demonstrated by scale-up preparation and diverse transformations, including the synthesis of Baclofen and several bioactive molecular motifs.
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Affiliation(s)
- Shuai Liu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Sen-Lin Wang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Jie Wan
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Shuang Peng
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Jie-Rui Zhang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Hua-Jiao Ding
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Bin Zhang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Hai-Liang Ni
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Peng Cao
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Ping Hu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Bi-Qin Wang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
| | - Bin Chen
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, People's Republic of China
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30
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Tang M, Zhu W, Sun H, Wang J, Jing S, Wang M, Shi Z, Hu J. Facile preparation of organosilanes from benzylboronates and gem-diborylalkanes mediated by KO tBu. Chem Sci 2023; 14:7355-7360. [PMID: 37416710 PMCID: PMC10321478 DOI: 10.1039/d3sc02461j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 06/10/2023] [Indexed: 07/08/2023] Open
Abstract
Methods to efficiently synthesize organosilanes are valuable in the fields of synthetic chemistry and materials science. During the past decades, boron conversion has become a generic and powerful approach for constructing carbon-carbon and other carbon-heteroatom bonds, but its potential application in forming carbon-silicon remains unexplored. Herein, we describe an alkoxide base-promoted deborylative silylation of benzylic organoboronates, geminal bis(boronates) or alkyltriboronates, allowing for straightforward access to synthetically valuable organosilanes. This selective deborylative methodology exhibits operational simplicity, broad substrate scope, excellent functional group compatibility and convenient scalability, providing an effective and complementary platform for the generation of diversified benzyl silanes and silylboronates. Detailed experimental results and calculated studies revealed an unusual mechanistic feature of this C-Si bond formation.
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Affiliation(s)
- Man Tang
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Wenyan Zhu
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Huaxing Sun
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Jing Wang
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Su Jing
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Minyan Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Jiefeng Hu
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
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31
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Li Y, Zhang SY, Yan XL, Zhu J, Luo K, Wu L. Visible-Light-Induced Palladium-Catalyzed Construction of Polyarylfuran Skeletons via Cascade Aryl Radical Cyclization and C(sp 3)-P(V) Bond Cleavage. Org Lett 2023. [PMID: 37338141 DOI: 10.1021/acs.orglett.3c01680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Herein, a novel and expedient method was established for the synthesis of polyarylfuran derivatives. The coupling of allenylphosphine oxide and bromophenol or bromonaphthol enabled by visible light and palladium catalysis directly furnishes polyarylfuran skeletons, which involves a radical tandem cyclization and cascade C(sp3)-P(V) bond cleavage. This protocol features easy operation, a broad substrate scope, and a high step economy, affording polyarylfurans in moderate to good yields.
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Affiliation(s)
- Yang Li
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Shen-Yuan Zhang
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Xiao-Long Yan
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Jie Zhu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Kai Luo
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, P. R. China
| | - Lei Wu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, P. R. China
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32
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Chattapadhyay D, Aydogan A, Doktor K, Maity A, Wu JW, Michaudel Q. Harnessing Sulfur(VI) Fluoride Exchange Click Chemistry and Photocatalysis for Deaminative Benzylic Arylation. ACS Catal 2023; 13:7263-7268. [PMID: 37655265 PMCID: PMC10468006 DOI: 10.1021/acscatal.3c01981] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 05/07/2023] [Indexed: 09/02/2023]
Abstract
While among the most common functional handles present in organic molecules, amines are a widely underutilized linchpin for C-C bond formation. To facilitate C-N bond cleavage, large activating groups are typically used but result in the generation of stoichiometric amounts of organic waste. Herein, we report an atom-economic activation of benzylic primary amines relying on the Sulfur(VI) Fluoride Exchange (SuFEx) click chemistry and the aza-Ramberg-Bäcklund reaction. This two-step sequence allows the high-yielding generation of 1,2-dialkyldiazenes from primary amines via loss of SO2. Excitation of the diazenes with blue light and an Ir photocatalyst affords radical pairs upon expulsion of N2, which can be coaxed into the formation of C(sp3)-C(sp2) bonds upon diffusion and capture by a Ni catalyst. This arylative strategy relying on a traceless click approach was harnessed in a variety of examples and its mechanism was investigated.
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Affiliation(s)
| | | | - Katarzyna Doktor
- Department of Chemistry, Texas
A&M University, College
Station, Texas 77843, United States
| | - Arunava Maity
- Department of Chemistry, Texas
A&M University, College
Station, Texas 77843, United States
| | - Jiun Wei Wu
- Department of Chemistry, Texas
A&M University, College
Station, Texas 77843, United States
| | - Quentin Michaudel
- Department of Chemistry, Texas
A&M University, College
Station, Texas 77843, United States
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33
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Steiniger KA, Lamb MC, Lambert TH. Cross-Coupling of Amines via Photocatalytic Denitrogenation of In Situ Generated Diazenes. J Am Chem Soc 2023; 145:11524-11529. [PMID: 37201211 PMCID: PMC10405275 DOI: 10.1021/jacs.3c03634] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A method for C(sp3)-C(sp3) cross-coupling of amines is described. Primary amines are converted to 1,2-dialkyldiazenes by treatment with O-nosylhydroxylamines in the presence of atmospheric oxygen. Denitrogenation of the diazenes with an iridium photocatalyst then forges the C-C bond. The substrate scope accommodates a broad latitude of functionality, including heteroaromatics and unprotected alcohols and acids.
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Affiliation(s)
- Keri A Steiniger
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Matthew C Lamb
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Tristan H Lambert
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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34
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Hu Y, Gao Y, Ye J, Ma Z, Feng J, Liu X, Lei P, Szostak M. Suzuki-Miyaura Cross-Coupling of 2-Pyridyl Trimethylammonium Salts by N-C Activation Catalyzed by Air- and Moisture-Stable Pd-NHC Precatalysts: Application to the Discovery of Agrochemicals. Org Lett 2023; 25:2975-2980. [PMID: 37079757 DOI: 10.1021/acs.orglett.3c00741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
We report the first Suzuki-Miyaura cross-coupling of 2-pyridyl ammonium salts by highly selective N-C activation catalyzed by air- and moisture-stable Pd(II)-NHC (NHC = N-heterocyclic carbene) precatalysts. The use of well-defined and highly reactive [Pd(IPr)(3-CF3-An)Cl2] (An = aniline) or [Pd(IPr)(cin)Cl] (cin = cinnamyl) Pd(II)-NHC catalysts permits an exceptionally broad scope of the cross-coupling to furnish valuable biaryl and heterobiarylpyridines that are ubiquitous in medicinal chemistry and agrochemistry research. The overall process leverages the Chichibabin C-H amination of pyridines with N-C activation to enable an attractive strategy to the 2-pyridyl problem. The utility of the method to the discovery of potent agrochemicals is presented. Considering the importance of 2-pyridines and the versatility of N-C activation methods, we envision that this new C-H/N-C activation strategy will find broad application.
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Affiliation(s)
- Yuge Hu
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Yanqing Gao
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Jiuhui Ye
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Zhiqing Ma
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Juntao Feng
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Xili Liu
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Peng Lei
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
- Shaanxi Research Center of Biopesticide Engineering & Technology, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
- State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China
| | - Michal Szostak
- Department of Chemistry, Rutgers, The State University of New Jersey, 73 Warren Street, Newark, New Jersey 07102, United States
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35
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He Y, Liu Q, Yang J, Liu Y, Zhang X, Fan X. Oxoammonium salt-promoted diverse functionalization of saturated cyclic amines with dinucleophiles. Chem Commun (Camb) 2023; 59:3874-3877. [PMID: 36916451 DOI: 10.1039/d2cc06936a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
Oxoammonium salt-promoted diverse functionalization of saturated cyclic amines with different dinucleophiles under mild conditions is presented. Specifically, when thiocyanate is used as a 1,3-dinucleophile, hexahydrothiazolo[4,5-b]pyridin-2(3H)-one derivatives are formed via the formation of the β-TEMPO-tethered cyclic iminium ion as a key intermediate. By contrast, when benzene-1,2-diamine is used as a 1,4-dinucleophile, 2-alkylquinoxaline derivatives are afforded via generation of the β-oxo cyclic iminium ion as a key intermediate. In addition, the usefulness of 2-alkylquinoxalines is showcased through their facile conversion into N-(2-oxo-2-(quinoxalin-2-yl)ethyl)nitrous amides featuring the synthetically useful N-NO moiety and the carbonyl group.
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Affiliation(s)
- Yan He
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Environment, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Qimeng Liu
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Environment, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Jintao Yang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Environment, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Yunfei Liu
- The 22nd Research Institute of China Electronics Technology Group Corporation, Xinxiang, Henan 453003, China
| | - Xinying Zhang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Environment, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Xuesen Fan
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Environment, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
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36
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Zhang J, Wang Y, Zhou X. Lanthanide-catalyzed deamidative cyclization of secondary amides and ynones through tandem C-H and C-N activation. Chem Commun (Camb) 2023; 59:3253-3256. [PMID: 36815667 DOI: 10.1039/d3cc00216k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
The tandem inert α-C-H and C-N bond activation of amides represents a highly valuable but challenging transformation in organic synthesis. Herein, a simple rare earth metal amido complex has been shown to catalyse unprecedented cyclization of amides with ynones to form trisubstituted 2-pyrones. This protocol significantly enables the selective merger of inert α-C-H and C-N bond activations of amides and indicates a particular role of rare earth catalysts in enhancing the selectivity for the α-C-H bond of amides in the presence of N-H bonds.
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Affiliation(s)
- Junxi Zhang
- Department of Chemistry, Fudan University, Shanghai, 200438, China.
| | - Yitu Wang
- Department of Chemistry, Fudan University, Shanghai, 200438, China.
| | - Xigeng Zhou
- Department of Chemistry, Fudan University, Shanghai, 200438, China. .,State Key Laboratory of Organometallic Chemistry, Shanghai, 200032, China
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37
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Abstract
ConspectusFluorine-containing compounds are extensively involved in various fields originating from intriguing and unique characteristics of fluorine atom; notably, in pharmaceuticals, the involvement of a fluorine atom or a fluorine-containing group is a chief technique for improving the pesticide effect and developing new drugs. Difluorocarbene, one of the most important and powerful fluorine-containing reagents, is widely employed and studied in many areas mainly to assemble gem-difluoromethyl molecules, including but not limited to the abundant reactions between difluorocarbene with nucleophilic substrates, Wittig reaction with ketones or aldehydes, cascade reaction with both a nucleophile and an electrophile, or [2+1] cycloaddition with alkenes or alkynes. However, its unconventional and intriguing protocols beyond as a difluoromethyl synthon have rarely been studied, and thus, it is highly desired given its abundance, inexpensiveness and peculiar properties. In this Account, we mainly discuss our discovery with unconventional transformations of difluorocarbene, instead of as a sole difluoromethyl source (different from other dihalocarbene), actually can serve as an electron acceptor to activate C-X bonds (X = N and O) and thus promote a myriad of fascinating transformations for the assembly of versatile valuable products with various aza-compounds (primary/secondary/tertiary amines as well as NH3 and NaNH2 and so on) and aliphatic ethers in the absence of transition metals and expensive ligands. Inspired by the electron-deficient characteristics of difluorocarbene, we first found that the isocyanides could be readily formed in situ when the unoccupied orbital of difluorocarbene meets the lone-pair of primary amines; in basic condition, a cascade defluorination and cyclizations could afford plethora of valuable N-containing heterocycles. Meanwhile, we disclosed that cyano anion could be accessible in situ as well when difluorocarbene and NaNH2 or NH3 were mixed up in suitable basic conditions, and thus a series of aryl nitrile compounds were obtained in the presence of Pd catalysis and ArI. Interestingly, when difluorocarbene encountered secondary amines, formamides were rendered under mild reactions. Of note, concomitant functionalizations of C and N moieties via cleavage of the unstrained C(sp3)-N bond in the absence of metal and oxidant are sparce, which indeed significantly add versatility and diversity to products. Gratifyingly, by uitilizing difluorocarbene and cyclic tertiary amines, we achieved difluorocarbene-mediated deconstructive functionalizations for the first time, showing successive C(sp3)-N bond scission of amines and simultaneous functionalization of C and N atoms which would be introduced into the products in the absence of transition metals and oxidants. This method provides a brand-new while very universal synthetic pathway to selectively cleave inert unactivated Csp3-N bonds, in which halodifluoromethyl reagents act as both C1 synthon and halo (Cl, Br, I) sources. Fascinatingly, nitrogen ylides are generated in situ from difluorocarbene and tertiary amines, and an intriguing and universal approach for deaminative arylation or alkenylation of tertiary amines was disclosed for the first time in appropriate basic conditions, which represents an intriguing reaction mode to lead to a formal transition-metal free Suzuki cross coupling. Besides, we also disclosed that difluorocarbene could proceed novel atom recombination to render meaningful 2-fluoroindoles or 3-(2,2-difluoroethyl)-2-fluoroindoles from ortho-vinylanilines, 3-fluorined oxindoles from 2-aminoarylketones, in which difluorocarbene acts as a C1 synthon and F1 source simultaneously. Last but not the least, we recently found that the lone-pair-electron of oxygen could trap difluorocarbene as well to form oxonium ylide, which eventually leads to C-O bond cleavage with the formation of difluoromethyl ethers.
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38
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Chen L, Qu Q, Ran CK, Wang W, Zhang W, He Y, Liao LL, Ye JH, Yu DG. Photocatalytic Carboxylation of C-N Bonds in Cyclic Amines with CO 2 by Consecutive Visible-Light-Induced Electron Transfer. Angew Chem Int Ed Engl 2023; 62:e202217918. [PMID: 36680762 DOI: 10.1002/anie.202217918] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/22/2023]
Abstract
Visible-light photocatalytic carboxylation with CO2 is highly important. However, it still remains challenging for reluctant substrates with low reduction potentials. Herein, we report a novel photocatalytic carboxylation of C-N bonds in cyclic amines with CO2 via consecutive photo-induced electron transfer (ConPET). It is also the first photocatalytic reductive ring-opening reaction of azetidines, pyrrolidines and piperidines. This strategy is practical to transform a variety of easily available cyclic amines to valuable β-, γ-, δ- and ϵ-amino acids in moderate-to-excellent yields. Moreover, the method also features mild and transition-metal-free conditions, high selectivity, good functional-group tolerance, facile scalability and product derivations. Mechanistic studies indicate that the ConPET might be the key to generating highly reactive photocatalysts, which enable the reductive activation of cyclic amines to generate carbon radicals and carbanions as the key intermediates.
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Affiliation(s)
- Lin Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Quan Qu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Chuan-Kun Ran
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Wei Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Wei Zhang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Yi He
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Li-Li Liao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400030, P. R. China
| | - Jian-Heng Ye
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China
| | - Da-Gang Yu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
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39
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Peng Y, Oestreich M. B(C 6 F 5 ) 3 -Catalyzed Regioselective Ring Opening of Cyclic Amines with Hydrosilanes. Chemistry 2023; 29:e202203721. [PMID: 36448647 DOI: 10.1002/chem.202203721] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 12/02/2022]
Abstract
Opening the ring of cyclic amines by regioselective fission of one of the carbon-nitrogen bonds greatly expands the repertoire of available nitrogen-containing skeletons. Unlike approaches starting from cyclic tertiary amines, methods that can directly open secondary amines are still scarce. The present work discloses an efficient reductive ring opening of either of these cyclic amines using PhSiH3 under B(C6 F5 )3 catalysis. By this, the direct transformation of unstrained cyclic amines into the corresponding acyclic amines is achieved in a simple one-pot operation. A stepwise mechanism proceeding through the intermediacy of silylammonium ions followed by reductive cleavage of a carbon-nitrogen bond was experimentally verified.
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Affiliation(s)
- Yi Peng
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623, Berlin, Germany
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40
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Liu K, Ding D, Xing W, Liu L, Zhang S, Meng Q, Chen T. Palladium-catalysed deaminative/decarboxylative cross-coupling of organoammonium salts with carboxylic acids. Org Biomol Chem 2023; 21:1384-1388. [PMID: 36652381 DOI: 10.1039/d2ob02251f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A palladium-catalysed carbon-carbon bond-forming reaction via deaminative/decarboxylative cross-coupling of organoammonium salts with carboxylic acids was developed. Under the reaction conditions, polyfluoroaromatic carboxylic acids, propiolic acids and α-cyano benzyl carboxylic acid reacted smoothly with benzyl ammonium salts to produce the corresponding carbon-carbon coupling products in good-to-excellent yields.
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Affiliation(s)
- Kuan Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Dexiang Ding
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Weitao Xing
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Long Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Shuo Zhang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Qi Meng
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Tieqiao Chen
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
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41
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Sirvinskaite G, Reisenbauer JC, Morandi B. Deaminative coupling of benzylamines and arylboronic acids. Chem Sci 2023; 14:1709-1714. [PMID: 36819866 PMCID: PMC9930926 DOI: 10.1039/d2sc06055h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 12/30/2022] [Indexed: 01/15/2023] Open
Abstract
A metal-free deaminative coupling of non-prefunctionalised benzylamines and arylboronic acids is reported. In this operationally simple reaction, a primary amine in benzylamine is converted into a good leaving group in situ using inexpensive and commercially available isoamyl nitrite as a nitrosating reagent. Lewis-acidic arylboronic acids are shown to replace mineral acids such as HCl or HBF4 that are conventionally used in the preparation of aryl diazonium salts. This unlocked the formation of the corresponding diarylmethanes by forging a new C-C bond in good yields.
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Affiliation(s)
- Giedre Sirvinskaite
- Laboratorium für Organische Chemie ETH Zürich Vladimir-Prelog-Weg 3, HCI Zürich 8093 Switzerland
| | - Julia C. Reisenbauer
- Laboratorium für Organische Chemie ETH ZürichVladimir-Prelog-Weg 3, HCIZürich 8093Switzerland
| | - Bill Morandi
- Laboratorium für Organische Chemie ETH Zürich Vladimir-Prelog-Weg 3, HCI Zürich 8093 Switzerland
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42
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Liu C, Chen HN, Xiao TF, Hu XQ, Xu PF, Xu GQ. Organic photoredox catalyzed dealkylation/acylation of tertiary amines to access amides. Chem Commun (Camb) 2023; 59:2003-2006. [PMID: 36723060 DOI: 10.1039/d2cc05842a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A mild metal-free C-N bond activation strategy for the direct conversion of inert tertiary amines with acyl chlorides into tertiary amides via organic photoredox catalysis is presented. In this protocol, a novel organic photocatalyst (Cz-NI-Ph) that showed excellent catalytic performance during C-N bond cleavage is developed. Moreover, this reaction features green and mild conditions, broad substrate scope, and readily available raw materials.
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Affiliation(s)
- Chen Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Han-Nan Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Teng-Fei Xiao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Xiu-Qin Hu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China. .,State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou 730000, P. R. China
| | - Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
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43
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Rahaman A, Shinde RD, Bhadra S. Catalytic Methylene Insertion between Amines and Terminal Alkynes via C-N Bond Cleavage of N, N-Dimethylacetamide: A Unique Route to Propargylic Amines. J Org Chem 2023; 88:1884-1889. [PMID: 36646442 DOI: 10.1021/acs.joc.2c02584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A copper-based system allows for the methylene insertion between an amine and a milder nucleophile, including a terminal alkyne counterpart, via C-N bond cleavage of N,N-dimethylacetamide. The method gives an expedient access to propargylic amines in good to excellent yields. A wide-ranging substrate scope and late-stage functionalization of complex molecules make the protocol practically valuable.
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Affiliation(s)
- Ajijur Rahaman
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, Gujarat, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Rupali Dasharath Shinde
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, Gujarat, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Sukalyan Bhadra
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, Gujarat, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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44
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Liu X, Zhao X, An W, Zhou X, Zhang S, Xu S, Wang YZ. Upcycling of waste thermosets into multiple-responsive supramolecular materials via acid-catalyzed oxidation. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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45
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Li Y, Handunneththige S, Xiong J, Guo Y, Talipov MR, Wang D. Direct Activation of the C(sp 3)-NH 2 Bond of Primary Aliphatic Alkylamines by a High-Valent Co III,IV2(μ-O) 2 Diamond Core Complex. J Am Chem Soc 2023; 145:2690-2697. [PMID: 36689463 PMCID: PMC9976198 DOI: 10.1021/jacs.2c13199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Aliphatic alkylamines are abundant feedstock and versatile building blocks for many organic transformations. While remarkable progress has been made to construct C-N bonds on aliphatic and aromatic carbon centers, the activation and functionalization of C(sp3)-NH2 bonds in primary alkylamines remain a challenging process. In the present work, we discovered an unprecedented method to directly activate the C(sp3)-NH2 bond of primary alkylamines by a high-valent dinuclear CoIII,IV2(μ-O)2 diamond core complex. This reaction results in the installation of other functional groups such as halides and alkenes onto the α-carbon center concomitant with the 2-e- oxidation of the nitrogen atom on the amino group to form NH2OH. These results shed light on future development enabling versatile functionalization of primary alkylamines based on the dinuclear cobalt system. Moreover, our work suggests that a related high-valent copper-oxo intermediate is likely generated in the ammonia monooxygenase catalytic cycle to affect the oxidation of NH3 to NH2OH.
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Affiliation(s)
- Yan Li
- Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Dynamics, University of Montana; Missoula, MT 59812, United States
| | - Suhashini Handunneththige
- Department of Chemistry and Biochemistry, New Mexico State University; Las Cruces, NM 88003, United States
| | - Jin Xiong
- Department of Chemistry, Carnegie Mellon University; Pittsburgh, PA 15213, United States
| | - Yisong Guo
- Department of Chemistry, Carnegie Mellon University; Pittsburgh, PA 15213, United States,Corresponding Author:; ;
| | - Marat R. Talipov
- Department of Chemistry and Biochemistry, New Mexico State University; Las Cruces, NM 88003, United States,Corresponding Author:; ;
| | - Dong Wang
- Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Dynamics, University of Montana; Missoula, MT 59812, United States,Corresponding Author:; ;
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46
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Liu LL, Wang LX, Peng M, Xiang J, Yang H, Yiu SM, Lau TC. Ring Nitrogenation of Aromatic Amines by the Excited State of an Osmium(VI) Nitrido Complex. Inorg Chem 2023; 62:1447-1454. [PMID: 36633522 DOI: 10.1021/acs.inorgchem.2c03514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The reactivity of electrophilic OsVI and RuVI nitrides toward various aliphatic and aromatic amines have been previously reported; these reactions all go through an initial nucleophilic addition of the amine nitrogen to MVI≡N (M = Os, Ru) to generate a MIV hydrazido species. Herein, we report that the excited state of a luminescent osmium(VI) nitrido complex, [OsVI(N)(L)(CN)3]- (OsN, HL = 2-(2-hydroxy-5-nitrophenyl)benzoxazole), undergoes unprecedented ring nitrogenation of aromatic amines. Visible-light irradiation of OsN generates OsN*, which predominantly attacks the aromatic ring of 2,6-dimethylaniline (Me2PhNH2) to give an Os(II) benzoquinone diimine compound (PPh4)[OsII(L)(CN)3(p-NH═Me2Ph═NH2)] [(PPh4)2] in 60% yield, while nucleophilic addition of the amine N to OsN* also occurs to give the osmium(II) diazonium compound (PPh4)[OsII(L)(CN)3(N = N-Me2Ph)] [(PPh4)1] as a minor product (10% yield). On the other hand, OsN* undergoes exclusive ring nitrogenation of diphenylamine, indole, and carbazole to give the corresponding osmium(II) benzoquinone diimines. All products have been characterized by various spectroscopic techniques and by X-ray crystallography. The reaction between OsN* and Ar2N is proposed to proceed via an initial 1e- transfer (ET) followed by proton transfer (PT) to generate OsVNH and Ar2N• intermediates, which then further combine to give the product. The benzoquinone diimine ligands are susceptible to oxidation. Oxidation of 2 with H2O2 at ambient conditions affords [OsIV(L)(CN)3(N═PhMe2(O)═O)]-, which bears the previously unknown (epoxy)benzoquinone iminato ligand.
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Affiliation(s)
- Lu-Lu Liu
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434020, Hubei, China
| | - Li-Xin Wang
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434020, Hubei, China
| | - Min Peng
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434020, Hubei, China
| | - Jing Xiang
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434020, Hubei, China
| | - Huan Yang
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434020, Hubei, China
| | - Shek-Man Yiu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong 999077, Hong Kong, China
| | - Tai-Chu Lau
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong 999077, Hong Kong, China
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47
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Peng C, Hou S, Yuan L, Liu Y, Guo F. Self‐Supporting and Shell‐Core Pd−Ni@Ni Nanowire Arrays Electrode as Anode of Direct Carbohydrazide Fuel Cell. ChemElectroChem 2023. [DOI: 10.1002/celc.202201007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Chao Peng
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan 430081 P. R. China
| | - Shuai Hou
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan 430081 P. R. China
| | - Lan Yuan
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan 430081 P. R. China
| | - Yi Liu
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan 430081 P. R. China
- Hubei Key Laboratory of Radiation Chemistry and Functional Materials Hubei University of Science and Technology Xianning 437100 P. R. China
| | - Fen Guo
- Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials School of Chemistry and Chemical Engineering Wuhan University of Science and Technology Wuhan 430081 P. R. China
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48
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Zheng L, Mei W, Zou X, Zhong Y, Wu Y, Deng L, Wang Y, Yang B, Guo W. DBU-Promoted Deaminative Thiolation of 1 H-Benzo[ d]imidazol-2-amines and Benzo[ d]oxazol-2-amines. J Org Chem 2023; 88:272-284. [PMID: 36521048 DOI: 10.1021/acs.joc.2c02297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A facile and efficient catalyst-/metal-/oxidant-free DBU-promoted deaminative thiolation reaction of 1H-benzo[d]imidazol-2-amines and benzo[d]oxazol-2-amines has been developed at room temperature conditions in a one-pot protocol. This practical three-component strategy represents a novel and environmentally friendly reaction pathway toward the straightforward synthesis of various 2-thio-1H-benzo[d]imidazoles and 2-thiobenzo[d]oxazoles using carbon disulfide as a sulfur source through C-N bond cleavage and C-S bond formation process. Different types of 1H-benzo[d]imidazol-2-amines, benzo[d]oxazol-2-amines, and organic bromides are suitable substrates. The gram-scale and late-stage modification experiments provide the potential applications based on this methodology in the field of organic and medicinal chemistry.
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Affiliation(s)
- Lvyin Zheng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Weijie Mei
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xiaoying Zou
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Yumei Zhong
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Yingying Wu
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Lei Deng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Yihan Wang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Beining Yang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Wei Guo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
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49
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Jyoti Roy V, Pathania V, Raha Roy S. Making and Breaking of C-N Bonds: Applications in the Synthesis of Unsymmetric Tertiary Amines and α-Amino Carbonyl Derivatives. Chem Asian J 2023; 18:e202200998. [PMID: 36373843 DOI: 10.1002/asia.202200998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/31/2022] [Indexed: 11/16/2022]
Abstract
An operationally simple process has been developed for the synthesis of unsymmetrical amines and α-amino carbonyl derivatives in the absence of a catalyst, ligand, oxidant, or any additives. Contrary to known reductive amination methods, this protocol is amenable to substrates containing other reducible groups. This process effectively results in consecutive cleavage and formation of C-N bonds. DFT studies and Hammett analysis provide useful insight into the mechanism. The role of noncovalent interactions as a stabilizing factor have been examined in the protocol. A wide range of alkyl-bromides have been coupled efficiently with a variety of dimethyl anilines to get unsymmetric tertiary amines with yields up to 90%. This methodology was further extended to the synthesis of α-amino carbonyl derivatives with yields up to 93%.
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Affiliation(s)
- Vishal Jyoti Roy
- Department of Chemistry, Indian Institute of Technology Delhi, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Vishali Pathania
- Department of Chemistry, Indian Institute of Technology Delhi, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Sudipta Raha Roy
- Department of Chemistry, Indian Institute of Technology Delhi, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
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50
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Zhang‡ Z, Chen‡ X, Wang B, Wang L, Li Y, Yan X, Chen L. Continuous synthesis of 2,2,6,6-tetramethyl-4-piperidinol over CuCrSr/Al 2O 3: effect of Sr promoter †. RSC Adv 2023; 13:9576-9584. [PMID: 36968054 PMCID: PMC10037677 DOI: 10.1039/d2ra08306j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 03/06/2023] [Indexed: 03/26/2023] Open
Abstract
A continuous process was developed for catalytic hydrogenation of triacetoneamine (TAA) to 2,2,6,6-tetramethyl-4-piperidinol (TMP), both of which are indispensable raw materials of hindered amine light stabilizers. A series of promoter-modified CuCr/Al2O3 catalysts were prepared by co-precipitation method and evaluated by the above reaction. The effect of promoter on the catalytic performance was explored by characterization tools, in which, CuCrSr/Al2O3 exhibited excellent catalytic performance with nearly complete conversion of TAA and over 97% selectivity of TMP at 120 °C. The characterization results indicated that the doped Sr could decrease the size of Cu nanoparticles to provide more active sites, improve the ratio of Cu+/Cu0 to promote the adsorption of substrates, and reduce the surface acidity to depress side reactions, thus remarkably enhancing catalytic performance. This work provides a low-cost, reliable and efficient strategy for the continuous industrial production of TMP. Sr-modified CuCr/Al2O3 catalysts effectively promote the continuous process of catalytic hydrogenation from TAA to TMP.![]()
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Affiliation(s)
- Zijing Zhang‡
- School of Chemical Engineering and Technology, Tianjin UniversityTianjin 300350P. R. China
- Zhejiang Institute of Tianjin UniversityShaoxingZhejiang 312300P. R. China
- Tianjin Engineering Research Center of Functional Fine ChemicalsTianjinP. R. China
- Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang CenterGuangdong Province 522000P. R. China
| | - Xi Chen‡
- Institute of Pharmaceutical Sciences, China Pharmaceutical UniversityNanjing 210009P. R. China
| | - Bowei Wang
- School of Chemical Engineering and Technology, Tianjin UniversityTianjin 300350P. R. China
- Zhejiang Institute of Tianjin UniversityShaoxingZhejiang 312300P. R. China
- Tianjin Engineering Research Center of Functional Fine ChemicalsTianjinP. R. China
- Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang CenterGuangdong Province 522000P. R. China
| | - Long Wang
- School of Chemical Engineering and Technology, Tianjin UniversityTianjin 300350P. R. China
| | - Yang Li
- School of Chemical Engineering and Technology, Tianjin UniversityTianjin 300350P. R. China
- Tianjin Engineering Research Center of Functional Fine ChemicalsTianjinP. R. China
- Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang CenterGuangdong Province 522000P. R. China
| | - Xilong Yan
- School of Chemical Engineering and Technology, Tianjin UniversityTianjin 300350P. R. China
- Tianjin Engineering Research Center of Functional Fine ChemicalsTianjinP. R. China
- Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang CenterGuangdong Province 522000P. R. China
| | - Ligong Chen
- School of Chemical Engineering and Technology, Tianjin UniversityTianjin 300350P. R. China
- Zhejiang Institute of Tianjin UniversityShaoxingZhejiang 312300P. R. China
- Tianjin Engineering Research Center of Functional Fine ChemicalsTianjinP. R. China
- Guangdong Laboratory of Chemistry and Fine Chemical Industry Jieyang CenterGuangdong Province 522000P. R. China
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