1
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Wang X, He J, Wang YN, Zhao Z, Jiang K, Yang W, Zhang T, Jia S, Zhong K, Niu L, Lan Y. Strategies and Mechanisms of First-Row Transition Metal-Regulated Radical C-H Functionalization. Chem Rev 2024; 124:10192-10280. [PMID: 39115179 DOI: 10.1021/acs.chemrev.4c00188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
Radical C-H functionalization represents a useful means of streamlining synthetic routes by avoiding substrate preactivation and allowing access to target molecules in fewer steps. The first-row transition metals (Ti, V, Cr, Mn, Fe, Co, Ni, and Cu) are Earth-abundant and can be employed to regulate radical C-H functionalization. The use of such metals is desirable because of the diverse interaction modes between first-row transition metal complexes and radical species including radical addition to the metal center, radical addition to the ligand of metal complexes, radical substitution of the metal complexes, single-electron transfer between radicals and metal complexes, hydrogen atom transfer between radicals and metal complexes, and noncovalent interaction between the radicals and metal complexes. Such interactions could improve the reactivity, diversity, and selectivity of radical transformations to allow for more challenging radical C-H functionalization reactions. This review examines the achievements in this promising area over the past decade, with a focus on the state-of-the-art while also discussing existing limitations and the enormous potential of high-value radical C-H functionalization regulated by these metals. The aim is to provide the reader with a detailed account of the strategies and mechanisms associated with such functionalization.
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Affiliation(s)
- Xinghua Wang
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Jing He
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Ya-Nan Wang
- School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Chemical Theory and Mechanism, Chongqing University, Chongqing 401331, P. R. China
| | - Zhenyan Zhao
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Kui Jiang
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Wei Yang
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Tao Zhang
- Institute of Intelligent Innovation, Henan Academy of Sciences, Zhengzhou, Henan 451162, P. R. China
| | - Shiqi Jia
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
| | - Kangbao Zhong
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Linbin Niu
- College of Chemistry, and Pingyuan Laboratory, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Henan Normal University, Xinxiang, Henan 453007, 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
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Henan Normal University, Xinxiang, Henan 453007, P. R. China
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2
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Kou M, Zheng J, Li F, Huang L, Cao D, Zhong A, Yang J, Chen D. 1,3-Hydro-di/monofluoromethylation of N, N'-Cyclic Azomethine Imines with HCF 2SO 2Na/H 2CFSO 2Na via Photocatalytic Radical Addition. J Org Chem 2024; 89:11747-11752. [PMID: 39083827 DOI: 10.1021/acs.joc.4c00679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
The radical 1,3-hydro-di/monofluoromethylation of N,N'-cyclic azomethine imines with HCF2SO2Na/H2CFSO2Na via photoredox catalysis is described. This reaction exhibits broad functional group compatibility, providing the desired products in good yields. However, CF3SO2Na failed to produce the trifluoromethyl product. DFT calculations revealed that the transition state activation energy for radical trifluoromethylation was significantly higher and the isotropic charge repulsion makes it difficult for the CF3 radical to transfer electrons.
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Affiliation(s)
- Min Kou
- School of Pharmaceutical and Chemical Engineering, Taizhou University, 1139 Shifu Road, Taizhou 318000, China
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou 310018, China
| | - Jianli Zheng
- School of Pharmaceutical and Chemical Engineering, Taizhou University, 1139 Shifu Road, Taizhou 318000, China
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha West Higher Education District, Hangzhou 310018, China
| | - Feifei Li
- School of Pharmaceutical and Chemical Engineering, Taizhou University, 1139 Shifu Road, Taizhou 318000, China
| | - Ling Huang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, 1139 Shifu Road, Taizhou 318000, China
| | - Dongdong Cao
- School of Pharmaceutical and Chemical Engineering, Taizhou University, 1139 Shifu Road, Taizhou 318000, China
| | - Aiguo Zhong
- School of Pharmaceutical and Chemical Engineering, Taizhou University, 1139 Shifu Road, Taizhou 318000, China
| | - Jianguo Yang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, 1139 Shifu Road, Taizhou 318000, China
| | - Dingben Chen
- School of Pharmaceutical and Chemical Engineering, Taizhou University, 1139 Shifu Road, Taizhou 318000, China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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3
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Sun B, Li PX, Jiang Y, Yang LL, Huang PY, Shen RP, Chen MJ, Wang JY, Jin C. Visible-Light-Induced Desaturative β-Alkoxyoxalylation of N-Aryl Cyclic Amines with Difluoromethyl Bromides and H 2O Via a Triple Cleavage Process. Org Lett 2023; 25:6773-6778. [PMID: 37655856 DOI: 10.1021/acs.orglett.3c02770] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
A visible-light-driven desaturative β-alkoxyoxalyation of N-aryl cyclic amines with difluoromethyl bromides and H2O has been reported. This tandem reaction is triggered by homolysis of the C-Br bond to produce the difuoroalkyl radical, which undergoes the subsequent defluorinated β-alkoxyoxalylation cascades to afford a wide range of β-ketoester/ketoamides substituted enamines. The prominent feature of this reaction contains photocatalyst-free, transition-metal free, and mild conditions. The 18O labeling experiment disclosed that H2O is the oxygen source of the carbonyl unit.
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Affiliation(s)
- Bin Sun
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Pei-Xuan Li
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Yu Jiang
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Lu-Lu Yang
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Pan-Yi Huang
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Run-Pu Shen
- Zhejiang Engineering Research Center of Fat-soluble Vitamin, Shaoxing University, Shaoxing 312000, P. R. China
| | - Mao-Jie Chen
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Jia-Yang Wang
- School of Life Sciences, Huzhou University, Huzhou 313002, Zhejiang, P. R. China
| | - Can Jin
- College of Pharmaceutical Science, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
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4
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Abstract
We have developed an electrochemical method for the direct C-H sulfonylation of aldehyde hydrazones using sodium sufinates as the sulfonylating agent under supporting electrolyte-free conditions. This straightforward sulfonylation strategy afforded a library of (E)-sufonylated hydrazones with high tolerance of various functional groups. The radical pathway of this reaction has been revealed by the mechanistic studies.
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Affiliation(s)
- Biswajit Sarkar
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Payel Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
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5
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Dong DQ, Yang SH, Wu P, Wang JZ, Min LH, Yang H, Zhou MY, Wei ZH, Ding CZ, Wang YL, Gao JH, Wang SJ, Wang ZL. Copper-Catalyzed Difluoroalkylation Reaction. Molecules 2022; 27:molecules27238461. [PMID: 36500553 PMCID: PMC9740754 DOI: 10.3390/molecules27238461] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/14/2022] [Accepted: 11/14/2022] [Indexed: 12/07/2022] Open
Abstract
This review describes recent advances in copper-catalyzed difluoroalkylation reactions. The RCF2 radical is generally proposed in the mechanism of these reactions. At present, various types of copper-catalyzed difluoroalkylation reactions have been realized. According to their characteristics, we classify these difluoroalkylation reactions into three types.
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Affiliation(s)
- Dao-Qing Dong
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Shao-Hui Yang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Pei Wu
- Shandong Academy of Pesticide Sciences, Beiyuan Street, Jinan 250033, China
- Correspondence: (P.W.); (Z.-L.W.)
| | - Jin-Zhi Wang
- Tancheng County Agricultural Technology Popularization Center, Linyi 276100, China
| | - Ling-Hao Min
- Qingdao Zhongda Agritech Co., Ltd., Qingdao 266109, China
| | - Hao Yang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Meng-Yu Zhou
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Ze-Hui Wei
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Cai-Zhen Ding
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Yan-Li Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Jia-Hui Gao
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Shu-Jie Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Zu-Li Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
- National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing Forestry University, Nanjing 210037, China
- Correspondence: (P.W.); (Z.-L.W.)
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6
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Kumar Ghosh A, Neogi S, Das KK, Hajra A. Organocatalytic Oxidative C-H Amination of Aldehyde Hydrazones with Azoles at Ambient Temperature. J Org Chem 2022; 87:5682-5689. [PMID: 35471944 DOI: 10.1021/acs.joc.1c03146] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
An efficient, metal-free, and direct oxidative amination of aldehyde-derived hydrazones with azoles has been developed using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone as an organocatalyst at ambient temperature. This protocol provides a wide range of aminated hydrazone derivatives in a step and atom economical fashion. The reaction possibly follows a radical mechanism.
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Affiliation(s)
- Asim Kumar Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Sukanya Neogi
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Krishna Kanta Das
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
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7
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Niu Y, Cao CK, Ge C, Qu H, Chen C. The Pd-catalyzed synthesis of difluoroethyl and difluorovinyl compounds with a chlorodifluoroethyl iodonium salt (CDFI). CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.09.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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8
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Qu CH, Huang R, Liu Y, Liu T, Song GT. Bromine-radical-induced C sp2–H difluoroalkylation of quinoxalinones and hydrazones through visible-light-promoted C sp3–Br bond homolysis. Org Chem Front 2022. [DOI: 10.1039/d2qo00710j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Bromine radicals derived from photo-induced Csp3–Br bond homolysis can mediate H abstraction/imine radical formation from quinoxalinones and hydrazones, which in turn quench the in situ-generated difluoroalkyl radicals to furnish the products.
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Affiliation(s)
- Chuan-Hua Qu
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Run Huang
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Yuan Liu
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Tong Liu
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Gui-Ting Song
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
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9
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Shen J, Jiang X, Wu H, Xu J, Zhu Q, Zhang P. Copper-catalyzed selective oxidation of hydrazones through C(sp 3)-H functionalization. Org Biomol Chem 2021; 19:8917-8923. [PMID: 34617555 DOI: 10.1039/d1ob01563j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A simple and mild protocol for copper-catalyzed oxidation of hydrazones at the α-position has been reported. Various substrates are compatible, providing the corresponding products in moderate to good yields. This strategy provides an efficient and convenient solution for the synthesis of carbonyl hydrazone. A free radical pathway mechanism is suggested for the transformation.
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Affiliation(s)
- Jiabin Shen
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China. .,College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China.
| | - Xiaoying Jiang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China. .,College of Chemistry and Chemical Engineering, Central south University, Changsha, 410083, P.R. China
| | - Haifeng Wu
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China. .,College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China.
| | - Jun Xu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China.
| | - Qing Zhu
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Pengfei Zhang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China.
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10
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Wang Q, Gong H, Zhang Y, Peng Y, Chen H, Li M, Deng H, Hao J, Wan W. Visible-light mediated stereospecific C(sp 2)-H difluoroalkylation of ( Z)-aldoximes. Org Biomol Chem 2021; 19:7867-7874. [PMID: 34492676 DOI: 10.1039/d1ob01401c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible light mediated stereospecific C(sp2)-H difluoroalkylation of (Z)-aldoximes to (E)-difluoroalkylated ketoximes has been described. In this reaction, (hetero)-aromatic and aliphatic difluoroalkylated ketoximes could be obtained with the retention of the configuration of the starting aldoximes. A preliminary mechanism study showed that a difluoromethyl radical via an SET pathway was involved.
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Affiliation(s)
- Qian Wang
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Haiying Gong
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Yifang Zhang
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Yi Peng
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Hua Chen
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Mingjie Li
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Hongmei Deng
- Laboratory of Microstructures, Shanghai University, China
| | - Jian Hao
- Department of Chemistry, Shanghai University, Shanghai, China.
| | - Wen Wan
- Department of Chemistry, Shanghai University, Shanghai, China.
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11
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[4+1] cyclization of benzohydrazide and ClCF2COONa towards 1,3,4-oxadiazoles and 1,3,4-oxadiazoles-d5. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.08.089] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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13
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Li Y, Sun N, Zhang C, Hao M. Base‐Promoted
Formylation and
N
‐Difluoromethylation
of Azaindoles with Ethyl Bromodifluoroacetate as a Carbon Source. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yang Li
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
| | - Ning Sun
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
| | - Cai‐Lin Zhang
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
| | - Meng Hao
- Xi'an Key Laboratory of Textile Chemical Engineering Auxiliaries, School of Environmental and Chemical Engineering, Xi'an Polytechnic University Xi'an Shaanxi 710048 China
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14
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Mehta J, Aryal P, Prakash Reddy V. Cu‐Catalyzed C(sp
2
−H)‐Trifluoromethylation of Aldehyde Hydrazones with Langlois Reagent. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100205] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jatin Mehta
- Department of Chemistry Missouri University of Science and Technology Rolla MO 65409 USA
| | - Puspa Aryal
- Department of Chemistry Missouri University of Science and Technology Rolla MO 65409 USA
| | - V. Prakash Reddy
- Department of Chemistry Missouri University of Science and Technology Rolla MO 65409 USA
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15
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Akulov AA, Varaksin MV, Charushin VN, Chupakhin ON. C(sp2) – H functionalization of aldimines and related compounds: advances and prospects. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4978] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This is the first systematic review of the most relevant approaches to direct C(sp2)–H bond functionalization of azomethine derivatives. The scope of the applicability of various transformations is analyzed. The review assesses prospects of the application of this functionalization strategy in the multistep synthesis of valuable compounds for use in medicinal chemistry, materials science and related areas.
The bibliography includes 124 references.
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16
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Gao B, Ni Y, Liu X, Jiang T, Yan Q, Yang R, Zhang X. Copper‐Catalyzed Difluoroalkylation‐Thiolation of Alkenes Promoted by Na
2
S
2
O
5. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100091] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bao Gao
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Yingjie Ni
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Xiaojun Liu
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Tao Jiang
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Qian Yan
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Ruiting Yang
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
| | - Xiuli Zhang
- Department of Applied Chemistry Anhui Agricultural University Hefei 230036 People's Republic of China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Shanghai 200032 PR China
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17
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Zuo HD, Ji XS, Guo C, Tu SJ, Hao WJ, Jiang B. Cu-Catalyzed radical-triggered spirotricyclization of enediynes and enyne-nitriles for the synthesis of pentacyclic spiroindenes. Org Chem Front 2021. [DOI: 10.1039/d0qo01640c] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A new copper-catalyzed radical-triggered fluoromethylation-spirotricyclization of enediyne- and enyne-nitrile-containing para-quinone methides (p-QMs) was reported for the first time, and used to produce a series of hitherto unreported pentacyclic spiroindenes.
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Affiliation(s)
- Hang-Dong Zuo
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
- School of Chemistry & Materials Science
| | - Xiao-Shuang Ji
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Cheng Guo
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
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18
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Zhao K, Guo JY, Guan T, Wang YX, Tao JY, Zhang Y, Zhang QH, Ni K, Loh TP. Photoinitiated stereoselective direct C(sp 2)–H perfluoroalkylation and difluoroacetylation of enamides. Org Chem Front 2021. [DOI: 10.1039/d1qo00605c] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoinitiated regio- and stereoselective C(sp2)–H perfluoroalkylation and difluoroacetylation of enamides are developed, furnishing biologically and physiologically privileged fluoro-containing enamide scaffolds.
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Affiliation(s)
- Kai Zhao
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Jing-Yu Guo
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Ting Guan
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Ying-Xue Wang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Ji-Yu Tao
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Yu Zhang
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Qing-Hong Zhang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Kun Ni
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Teck-Peng Loh
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
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19
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Worp BA, Kosobokov MD, Levin VV, Dilman AD. Photoredox Fluoroalkylation of Hydrazones in Neutral and Reductive Modes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001381] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Boris A. Worp
- N. D. Zelinsky Institute of Organic Chemistry 119991 Moscow Leninsky prosp. 47 Russian Federation
- Lomonosov Moscow State University Department of Chemistry 119991 Moscow Leninskie Gory 1–3 Russian Federation
| | - Mikhail D. Kosobokov
- N. D. Zelinsky Institute of Organic Chemistry 119991 Moscow Leninsky prosp. 47 Russian Federation
| | - Vitalij V. Levin
- N. D. Zelinsky Institute of Organic Chemistry 119991 Moscow Leninsky prosp. 47 Russian Federation
| | - Alexander D. Dilman
- N. D. Zelinsky Institute of Organic Chemistry 119991 Moscow Leninsky prosp. 47 Russian Federation
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20
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Zhu S, Yang H, Jiang A, Zhou B, Han Y, Yan C, Shi Y, Hou H. Copper-Catalyzed Bromodifluoroacetylative Cyclization of Enynes. J Org Chem 2020; 85:15667-15675. [PMID: 33176101 DOI: 10.1021/acs.joc.0c02114] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A copper-catalyzed bromodifluoroacetylative cyclization reaction is described. The treatment of bromodifluoroacete derivatives by CuI and B2Pin2 enables difluoroalkyl radical generation and triggers the radical addition/cyclization/bromination sequences. Bromodifluoroacetyl-derived ester, amide, and ketone were compatible and gave various vinyl C-Br bonds containing functionalized heterocycles in good yields.
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Affiliation(s)
- Shaoqun Zhu
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225009, China
| | - Haibo Yang
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225009, China
| | - Along Jiang
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225009, China
| | - Bing Zhou
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225009, China
| | - Ying Han
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225009, China
| | - Chaoguo Yan
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225009, China
| | - Yaocheng Shi
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225009, China
| | - Hong Hou
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225009, China
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21
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Ma X, Song Q. Recent progress on selective deconstructive modes of halodifluoromethyl and trifluoromethyl-containing reagents. Chem Soc Rev 2020; 49:9197-9219. [PMID: 33146196 DOI: 10.1039/d0cs00604a] [Citation(s) in RCA: 119] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Halodifluoromethyl and trifluoromethyl-containing compounds are widely employed in organic chemistry, pharmaceuticals and materials science. Therefore, their applications and transformations have received significant attention during the past few decades. The single, double, triple and quadruple cleavage of halodifluoromethyl compounds and various deconstructive modes of trifluoromethyl-containing compounds could generate a variety of synthons to prepare more valuable products. Herein, we summarize the most significant achievements in this field with an intriguing focus on results from the last decade.
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Affiliation(s)
- Xingxing Ma
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University Fuzhou, Fujian, 350108, China
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22
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Su J, Ma X, Ou Z, Song Q. Deconstructive Functionalizations of Unstrained Carbon-Nitrogen Cleavage Enabled by Difluorocarbene. ACS CENTRAL SCIENCE 2020; 6:1819-1826. [PMID: 33145418 PMCID: PMC7596867 DOI: 10.1021/acscentsci.0c00779] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Indexed: 05/03/2023]
Abstract
Transition-metal- or oxidant-promoted deconstructive functionalizations of noncyclic carbon-nitrogen bonds are well established, usually only leaving one moiety functionalized toward the final product. In contrast, concomitant C- and N-functionalizations via the unstrained C(sp3)-N bond under metal- and oxidant-free conditions are very rare, which would favorably confer versatility and product diversity. Disclosed herein is the first difluorocarbene-induced deconstructive functionalizations embodying successive C(sp3)-N bond cleavage of cyclic amines and synchronous functionalization of both constituent atoms which would be preserved in the eventual molecular outputs under transition-metal-free and oxidant-free conditions. Correspondent access to deuterated formamides with ample isotopic incorporation was demonstrated by a switch to heavy water which is conceivably useful in pharmaceutical sciences. The current strategy remarkably administers a very convenient, operationally simple and novel method toward molecular diversity from readily available starting materials. Therefore, we project that these findings would be of broad interest to research endeavors encompassing fluorine chemistry, carbene chemistry, C-N bond activation, as well as medicinal chemistry.
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Affiliation(s)
- Jianke Su
- Institute of Next
Generation Matter Transformation, College of Material Sciences &
Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Xingxing Ma
- Institute of Next
Generation Matter Transformation, College of Material Sciences &
Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Zongliang Ou
- Institute of Next
Generation Matter Transformation, College of Material Sciences &
Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Qiuling Song
- Institute of Next
Generation Matter Transformation, College of Material Sciences &
Engineering at Huaqiao University, 668 Jimei Boulevard, 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
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23
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Zhou Y, Wu M, Liu Y, Cheng C, Zhu G. Synthesis of Polysubstituted Pyrroles via Silver-Catalyzed Oxidative Radical Addition of Cyclopropanols to Imines. Org Lett 2020; 22:7542-7546. [PMID: 32915585 DOI: 10.1021/acs.orglett.0c02735] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A silver-catalyzed formal [3 + 2] cycloaddition reaction, with cyclopropanols as a C3 subunit and imines as a two-atom subunit, is developed. The reaction takes place under mild conditions and produces a broad array of polysubstituted pyrroles in medium to high yields. It represents the first example of oxidative radical addition to imines, thus offering a new choice for the direct C-H functionalization of imines.
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Affiliation(s)
- Yulu Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
| | - Mingchang Wu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
| | - Yi Liu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
| | - Cungui Cheng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
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24
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Ma X, Yu X, Huang H, Zhou Y, Song Q. Synthesis of Thiazoles and Isothiazoles via Three-Component Reaction of Enaminoesters, Sulfur, and Bromodifluoroacetamides/Esters. Org Lett 2020; 22:5284-5288. [DOI: 10.1021/acs.orglett.0c01275] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xingxing Ma
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Xiaoxia Yu
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Hua Huang
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Yao Zhou
- College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi, Hubei 435002, China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering, Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
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25
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Xu Z, Li Y, Mo G, Zheng Y, Zeng S, Sun PH, Ruan Z. Electrochemical Oxidative Phosphorylation of Aldehyde Hydrazones. Org Lett 2020; 22:4016-4020. [DOI: 10.1021/acs.orglett.0c01343] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhongnan Xu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, P.R. China
| | - Yueheng Li
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, P.R. China
| | - Guangquan Mo
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, P.R. China
| | - Yucheng Zheng
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, P.R. China
| | - Shaogao Zeng
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education, College of Pharmacy, Jinan University, Guangzhou 510632, P.R. China
| | - Ping-Hua Sun
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education, College of Pharmacy, Jinan University, Guangzhou 510632, P.R. China
| | - Zhixiong Ruan
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, P.R. China
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26
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Hu L, Deng Q, Zhou Y, Zhang X, Xiong Y. Cu2O-catalyzed phosphonyldifluoromethylation of allylic alcohols through a radical 1,2-aryl migration. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.130949] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Wang Y, Zhou Y, Song Q. [3+1+1] type cyclization of ClCF2COONa for the assembly of imidazoles and tetrazoles via in situ generated isocyanides. Chem Commun (Camb) 2020; 56:6106-6109. [DOI: 10.1039/d0cc01919d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A facile synthesis of imidazoles and tetrazoles via [3+1+1] type cyclization of ClCF2COONa is developed.
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Affiliation(s)
- Ya Wang
- Institute of Next Generation Matter Transformation
- College of Materials Science & Engineering at Huaqiao University
- 668 Jimei Blvd, Xiamen
- Fujian
- P. R. China
| | - Yao Zhou
- College of Chemistry and Chemical Engineering
- Hubei Normal University
- Huangshi 435002
- P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation
- College of Materials Science & Engineering at Huaqiao University
- 668 Jimei Blvd, Xiamen
- Fujian
- P. R. China
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28
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Dong DQ, Yang H, Shi JL, Si WJ, Wang ZL, Xu XM. Promising reagents for difluoroalkylation. Org Chem Front 2020. [DOI: 10.1039/d0qo00567c] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review describes recent advances in difluoroalkylation reactions using different substrates.
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Affiliation(s)
- Dao-Qing Dong
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Huan Yang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Jun-Lian Shi
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Wen-Jia Si
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Zu-Li Wang
- College of Chemistry and Pharmaceutical Sciences
- Qingdao Agricultural University
- Qingdao 266109
- China
| | - Xin-Ming Xu
- College of Chemistry and Chemical Engineering
- Yantai University
- Yantai 264005
- China
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29
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Wang X, Hu J, Ren J, Wu T, Wu J, Wu F. Palladium-catalyzed one-pot construction of difluorinated 1,3-enynes from α,α,α-iododifluoroacetones and alkynes. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130715] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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30
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Ma X, Huang H, Su J, Song Z, Nakano T, Song Q. Synthesis of CF
2
H‐Containing Oxime Ethers Derivatives from ClCF
2
H,
tert
‐Butyl Nitrile and Indoles. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900401] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xingxing Ma
- Institute of Next Generation Matter Transformation, College of Materials Science & EngineeringHuaqiao University, 668 Jimei Blvd Xiamen Fujian 361021 China
| | - Hua Huang
- Institute of Next Generation Matter Transformation, College of Materials Science & EngineeringHuaqiao University, 668 Jimei Blvd Xiamen Fujian 361021 China
| | - Jianke Su
- Institute of Next Generation Matter Transformation, College of Materials Science & EngineeringHuaqiao University, 668 Jimei Blvd Xiamen Fujian 361021 China
| | - Zhiyi Song
- Institute for Catalysis (ICAT), Hokkaido University, N 21, W 10, Kita‐ku Sapporo 001‐0021 Japan
| | - Tamaki Nakano
- Institute for Catalysis (ICAT), Hokkaido University, N 21, W 10, Kita‐ku Sapporo 001‐0021 Japan
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Materials Science & EngineeringHuaqiao University, 668 Jimei Blvd Xiamen Fujian 361021 China
- Key Laboratory of Molecule Synthesis and Function DiscoveryFujian Province University, College of Chemistry, Fuzhou University Fuzhou Fujian 350108 China
- State Key Laboratroy of Organometallic Chemistry, Shanghai Institute of Organic ChemistryChinese Academy of Sciences Shanghai 200032 China
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31
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Ma X, Song Q. tert-Butyl Nitrite Mediated Synthesis of Fluorinated O-Alkyloxime Ether Derivatives. Org Lett 2019; 21:7375-7379. [PMID: 31465233 DOI: 10.1021/acs.orglett.9b02689] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A tert-butyl nitrite (TBN)-mediated synthesis of fluorinated O-alkyloxime ether derivatives with bromodifluoroalkyl reagents as the fluorine sources has been developed. A variety of halodifluorinated compounds were found compatible, delivering the desired products in moderate to excellent yields. This transformation features a simple operation, can be done in air, and found to involve radicals. This protocol represents a straightforward approach to access various fluorinated O-alkyloxime ether derivatives.
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Affiliation(s)
- Xingxing Ma
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering , Huaqiao University , 668 Jimei Blvd , Xiamen , Fujian 361021 , China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering , Huaqiao University , 668 Jimei Blvd , 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 Laboratroy of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , CAS, Shanghai , 200032 , China
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32
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Deng S, Chen H, Ma X, Zhou Y, Yang K, Lan Y, Song Q. S 8-Catalyzed triple cleavage of bromodifluoro compounds for the assembly of N-containing heterocycles. Chem Sci 2019; 10:6828-6833. [PMID: 31391905 PMCID: PMC6657413 DOI: 10.1039/c9sc01333d] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 05/31/2019] [Indexed: 12/15/2022] Open
Abstract
An unprecedented S8-catalyzed selective triple-cleavage of bromodifluoroacetamides is disclosed for the first time.
An unprecedented S8-catalyzed selective triple-cleavage of bromodifluoroacetamides is disclosed for the first time. Valuable 2-amido substituted benzimidazoles, benzoxazoles and benzothiazoles were obtained in good to excellent yields in a cascade protocol in this strategy. Mechanistic studies suggested that a C2 source was generated in situ by selective cleavage of three C–X bonds, including two inert C(sp3)–F bonds on bromodifluoroacetamides, while leaving C–C bonds intact. This strategy will undoubtedly further consummate the role of halo difluoro compounds and enrich both fluorine chemistry and pharmaceutical sciences.
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Affiliation(s)
- Shuilin Deng
- Institute of Next Generation Matter Transformation , College of Chemical Engineering , College of Material Sciences Engineering at Huaqiao University , 668 Jimei Boulevard , Xiamen , Fujian 361021 , China .
| | - Haohua Chen
- School of Chemistry and Chemical Engineering , Chongqing University , Chongqing 400030 , P. R. China
| | - Xingxing Ma
- Institute of Next Generation Matter Transformation , College of Chemical Engineering , College of Material Sciences Engineering at Huaqiao University , 668 Jimei Boulevard , Xiamen , Fujian 361021 , China .
| | - Yao Zhou
- Institute of Next Generation Matter Transformation , College of Chemical Engineering , College of Material Sciences Engineering at Huaqiao University , 668 Jimei Boulevard , Xiamen , Fujian 361021 , China .
| | - Kai Yang
- College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China
| | - Yu Lan
- School of Chemistry and Chemical Engineering , Chongqing University , Chongqing 400030 , P. R. China.,College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450001 , P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation , College of Chemical Engineering , College of Material Sciences Engineering at Huaqiao University , 668 Jimei Boulevard , Xiamen , Fujian 361021 , China . .,College of Chemistry , Fuzhou University , Fuzhou , Fujian 350108 , China.,State Key Laboratroy of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , Shanghai 200032 , P. R. China
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33
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Zhang Y, Huang C, Lin X, Hu Q, Hu B, Zhou Y, Zhu G. Modular Synthesis of Alkylarylazo Compounds via Iron(III)-Catalyzed Olefin Hydroamination. Org Lett 2019; 21:2261-2264. [PMID: 30869900 DOI: 10.1021/acs.orglett.9b00540] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel Fe-catalyzed olefin hydroamination with aryldiazo sulfones for accessing alkylarylazo compounds has been successfully developed. Aryldiazo sulfones are used as radical acceptors, and N-N double bonds will be regenerated when an arene sulfonyl group leaves. The reaction features mild reaction conditions and a broad substrate scope, allowing access to many azo compounds that would be difficult or perhaps impossible to access using other methods.
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Affiliation(s)
- Yan Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Chenchao Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Xinru Lin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Qi Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Boyue Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Yulu Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
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34
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Wang L, Liu H, Li F, Zhao J, Zhang H, Zhang Y. Copper‐Catalyzed C3−H Difluoroacetylation of Quinoxalinones with Ethyl Bromodifluoroacetate. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900066] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Liping Wang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Hongyun Liu
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Fanfan Li
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Jiquan Zhao
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Hong‐Yu Zhang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Yuecheng Zhang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
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35
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Liu X, Zhou Y, Song Q. Metal-free cyclization of unsaturated hydrazones for the divergent assembly of pyrazolones and pyrazolines. Chem Commun (Camb) 2019; 55:8943-8946. [DOI: 10.1039/c9cc04039k] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An oxidative cyclization of β,γ-unsaturated hydrazones for the divergent assembly of pyrazolones and pyrazolines under metal-free conditions is presented.
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Affiliation(s)
- Xiaobing Liu
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering and College of Chemical Engineering at Huaqiao University
- Xiamen
- P. R. China
| | - Yao Zhou
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering and College of Chemical Engineering at Huaqiao University
- Xiamen
- P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Materials Science & Engineering and College of Chemical Engineering at Huaqiao University
- Xiamen
- P. R. China
- Key Laboratory for Organic Synthesis and Function Discovery
- Fuzhou Province University
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36
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Cui J, Meng L, Chi X, Liu Q, Zhao P, Zhang DP, Chen L, Li X, Dong Y, Liu H. A palladium-catalyzed regiocontrollable hydroarylation reaction of allenamides with B2pin2/H2O. Chem Commun (Camb) 2019; 55:4355-4358. [DOI: 10.1039/c9cc00797k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel palladium-catalyzed regiocontrollable hydroarylation reaction of allenamides with B2pin2/H2O has been disclosed.
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Affiliation(s)
- Jie Cui
- School of Chemistry & Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Long Meng
- School of Chemistry & Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Xiaochen Chi
- School of Chemistry & Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Qing Liu
- School of Chemistry & Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Pingping Zhao
- College of Chemical and Environmental Engineering
- Shandong University of Science and Technology
- Qingdao
- P. R. China
| | - Dao-peng Zhang
- School of Chemistry & Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Lei Chen
- School of Chemistry & Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Xinjin Li
- School of Chemistry & Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Yunhui Dong
- School of Chemistry & Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Hui Liu
- School of Chemistry & Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
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37
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Yu X, Zhou Y, Ma X, Song Q. Transition metal-free assembly of 1,3,5-triazines using ethyl bromodifluoroacetate as C1 source. Chem Commun (Camb) 2019; 55:8079-8082. [DOI: 10.1039/c9cc03534f] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Transition-metal and oxidant-free annulation of amidine to access 2,4-disubstituted-1,3,5-triazines using ethyl bromodifluoroacetate as C1 source via quadruple cleavage.
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Affiliation(s)
- Xiaoxia Yu
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering and College of Materials Science & Engineering at Huaqiao University
- Xiamen
- P. R. China
| | - Yao Zhou
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering and College of Materials Science & Engineering at Huaqiao University
- Xiamen
- P. R. China
| | - Xingxing Ma
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering and College of Materials Science & Engineering at Huaqiao University
- Xiamen
- P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering and College of Materials Science & Engineering at Huaqiao University
- Xiamen
- P. R. China
- College of Chemistry
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38
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Li XF, Zhang XG, Chen F, Zhang XH. Copper-Catalyzed N-Formylation of Amines through Tandem Amination/Hydrolysis/Decarboxylation Reaction of Ethyl Bromodifluoroacetate. J Org Chem 2018; 83:12815-12821. [DOI: 10.1021/acs.joc.8b01555] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiao-Fang Li
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Xing-Guo Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Fan Chen
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Xiao-Hong Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
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39
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Da Y, Han S, Du X, Liu S, Liu L, Li J. Copper(I)-Catalyzed Oxydifluoroalkylation of Alkenes: A Route to Functionalization of Lactones. Org Lett 2018; 20:5149-5152. [DOI: 10.1021/acs.orglett.8b02069] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yang Da
- School of Pharmaceutical Science, Jiangnan University, Lihu Road 1800, 214122 Wuxi, P. R. China
| | - Shengnan Han
- School of Pharmaceutical Science, Jiangnan University, Lihu Road 1800, 214122 Wuxi, P. R. China
| | - Xiaoyong Du
- School of Pharmaceutical Science, Jiangnan University, Lihu Road 1800, 214122 Wuxi, P. R. China
| | - Shaodong Liu
- School of Pharmaceutical Science, Jiangnan University, Lihu Road 1800, 214122 Wuxi, P. R. China
| | - Lei Liu
- School of Pharmaceutical Science, Jiangnan University, Lihu Road 1800, 214122 Wuxi, P. R. China
| | - Jie Li
- School of Pharmaceutical Science, Jiangnan University, Lihu Road 1800, 214122 Wuxi, P. R. China
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40
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Kong W, Yu C, An H, Song Q. Copper-Catalyzed Intermolecular Reductive Radical Difluoroalkylation–Thiolation of Aryl Alkenes. Org Lett 2018; 20:4975-4978. [DOI: 10.1021/acs.orglett.8b02091] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | - Qiuling Song
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China
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41
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Ma X, Zhou Y, Song Q. Synthesis of β-Aminoenones via Cross-Coupling of In-Situ-Generated Isocyanides with 1,3-Dicarbonyl Compounds. Org Lett 2018; 20:4777-4781. [PMID: 30067040 DOI: 10.1021/acs.orglett.8b01888] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and practical strategy for the synthesis of β-aminoenones from a three-component reaction was developed. Ethyl bromodifluoroacetate serves as a C1 source in this strategy, forming isocyanides in situ with primary amines. This reaction represents the first example of utilization of readily available starting materials to generate isocyanides in situ and sequentially fully converted to β-aminoenones, avoiding the generation of byproduct imines and overinsertion products. The mechanism study suggested that this method involves activation of two C(sp3)-F bonds and the formation of isocyanides, which might nourish both isocyanide chemistry and fluorine chemistry.
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42
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Li D, Mao T, Huang J, Zhu Q. Copper-Catalyzed Bromodifluoroacetylation of Alkenes with Ethyl Bromodifluoroacetate. J Org Chem 2018; 83:10445-10452. [DOI: 10.1021/acs.joc.8b01434] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Dengke Li
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, Yunnan, China
| | - Tingting Mao
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinbo Huang
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qiang Zhu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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43
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Fu W, Zhou Y, Song Q. Copper/Diboron-Mediated Intramolecular Oxygenation and Allylation/Benzylation of Nitroalkynes for the Synthesis of C2-Quaternary Indolin-3-ones. Chem Asian J 2018; 13:2511-2515. [DOI: 10.1002/asia.201800500] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 04/28/2018] [Indexed: 01/28/2023]
Affiliation(s)
- Wenqiang Fu
- Institute of Next Generation Matter Transformation; College of Chemical Engineering & College of Material Sciences Engineering at Huaqiao University; 668 Jimei Blvd Xiamen Fujian 361021 P. R. China),
| | - Yao Zhou
- Institute of Next Generation Matter Transformation; College of Chemical Engineering & College of Material Sciences Engineering at Huaqiao University; 668 Jimei Blvd Xiamen Fujian 361021 P. R. China),
| | - Qiuling Song
- Institute of Next Generation Matter Transformation; College of Chemical Engineering & College of Material Sciences Engineering at Huaqiao University; 668 Jimei Blvd Xiamen Fujian 361021 P. R. China),
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44
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Soni V, Sharma DM, Punji B. Nickel-Catalyzed Regioselective C(2)-H Difluoroalkylation of Indoles with Difluoroalkyl Bromides. Chem Asian J 2018; 13:2516-2521. [PMID: 29722157 DOI: 10.1002/asia.201800504] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/01/2018] [Indexed: 12/20/2022]
Abstract
Regioselective C(2)-H difluoroalkylation of C-3 unsubstituted indoles with commonly available fluoroalkyl bromides is successfully achieved employing a simple nickel catalyst system, (DME)NiCl2 /Xantphos. This methodology shows excellent regioselectivity and exhibits a broad substrate scope. Various functional groups, such as -OMe, -F, and -Br, are tolerated on the indole backbone to give the difluoroalkylated products in moderate to good yields. Preliminary mechanistic findings demonstrate that the reaction is homogeneous in nature and involves a radical manifold. Synthetic utility of this nickel-catalyzed method is demonstrated by synthesizing melatonin receptor antagonist Luzindole derivative.
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Affiliation(s)
- Vineeta Soni
- Organometallic Synthesis and Catalysis Group, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, Maharastra, India
| | - Dipesh M Sharma
- Organometallic Synthesis and Catalysis Group, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, Maharastra, India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Group, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, Maharastra, India
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45
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Pi D, Zhou H, Zhou Y, Liu Q, He R, Shen G, Uozumi Y. Cu-catalyzed reduction of azaarenes and nitroaromatics with diboronic acid as reductant. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.03.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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46
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Mondal S, Samanta S, Hajra A. Synthesis of Triazolium Inner Salts by Thiocyanation of Aldehyde-Derived Hydrazones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701722] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Susmita Mondal
- Department of Chemistry; Visva-Bharati (A Central University); 731235 Santiniketan West Bengal India
| | - Sadhanendu Samanta
- Department of Chemistry; Visva-Bharati (A Central University); 731235 Santiniketan West Bengal India
| | - Alakananda Hajra
- Department of Chemistry; Visva-Bharati (A Central University); 731235 Santiniketan West Bengal India
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47
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Prieto A, Bouyssi D, Monteiro N. Radical-Mediated Formal C(sp2
)-H Functionalization of Aldehyde-Derived N
,N
-Dialkylhydrazones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701600] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Alexis Prieto
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Univ Lyon; Université Claude Bernard Lyon 1; 69622 Villeurbanne France
| | - Didier Bouyssi
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Univ Lyon; Université Claude Bernard Lyon 1; 69622 Villeurbanne France
| | - Nuno Monteiro
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Univ Lyon; Université Claude Bernard Lyon 1; 69622 Villeurbanne France
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48
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Xu P, Li W, Xie J, Zhu C. Exploration of C-H Transformations of Aldehyde Hydrazones: Radical Strategies and Beyond. Acc Chem Res 2018; 51:484-495. [PMID: 29359909 DOI: 10.1021/acs.accounts.7b00565] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The chemistry of hydrazones has gained great momentum due to their involvement throughout the evolution of organic synthesis. Herein, we discuss the tremendous developments in both the methodology and application of hydrazones. Hydrazones can be recognized not only as synthetic equivalents to aldehydes and ketones but also as versatile synthetic building blocks. Consequently, they can participate in a range of practical synthetic transformations. Furthermore, hydrazone derivatives display a broad array of biological activities and have been widely applied as pharmaceuticals. Owing to the weak directing group effect of simple aldehydes and ketones in C-H bond functionalizations, the C-H bond functionalizations of hydrazones that have been developed in the past five years represent a significant step forward. These novel transformations open a new door to a broader library of functionalized and complex small molecules. Moreover, a wide range of biologically important N-heterocycles (dihydropyrazoles, pyrazoles, indazoles, cinnolines, etc.) can be efficiently synthesized in an atom- and step-economical manner through single, double, or triple C-H bond functionalizations of hydrazones. Both radical C-H functionalizations and transition-metal-catalyzed directing-group strategies have enhanced the synthetic utility of hydrazones in the chemical community because these strategies solve the long-standing challenge of C-H functionalizations adjacent to aldehydes and ketones. We began this study based on our ongoing interest in visible-light photoredox catalysis. Visible-light photoredox catalysis has become a powerful tool in contemporary synthetic chemistry due to its remarkable advantages in sustainability and use of radical chemistry. By exploiting a photoredox-catalyzed aminyl radical polar crossover (ARPC) strategy, we successfully achieved visible-light-induced C(sp2)-H difluoroalkylation, trifluoromethylation, and perfluoroalkylation of aldehyde-derived hydrazones. This intriguing result was later applied in the C(sp2)-H amination of hydrazones and a cascade cyclization reaction for the synthesis of polycyclic compounds. Encouraged by this redox-neutral C-H functionalization of aldehyde hydrazones, we extended the oxidative C-H/P-H cross-coupling method, which represents a novel and efficient method for the synthesis of α-iminophosphine oxides. Furthermore, an elegant [3 + 2] cycloaddition of azides and aldehyde hydrazones for the synthesis of functionalized tetrazoles was advantageously developed during our investigation of the oxidative C(sp2)-H azidation of aldehyde hydrazones with TMSN3. The sequential C(sp2)-H/C(sp3)-H bond functionalization of aldehyde-derived hydrazones with simple 2,2-dibromo-1,3-dicarbonyls was achieved by employing relay photoredox catalysis, and it provides a novel method of accessing bioactive fused dihydropyrazole derivatives. The notable feature of this approach was further reflected in the formal [4 + 1] annulation of aldehyde-derived N-tetrahydroisoquinoline hydrazones with 2-bromo-1,3-dicarbonyls. To complement these radical C-H functionalization strategies, we recently applied a directing-group strategy in the Rh-catalyzed C(aldehyde)-H functionalization of aldehyde-derived hydrazones for the synthesis of distinctive and bioactive 1H-indazole scaffolds. In summary, this Account presents recent contributions to the exploration, development, mechanistic insights, and synthetic applications of C-H bond functionalizations of aldehyde hydrazones.
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Affiliation(s)
- Pan Xu
- State
Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of
Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Weipeng Li
- State
Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of
Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Jin Xie
- State
Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of
Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Chengjian Zhu
- State
Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of
Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P. R. China
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49
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Fu W, Song Q. Copper-Catalyzed Radical Difluoroalkylation and Redox Annulation of Nitroalkynes for the Construction of C2-Tetrasubstituted Indolin-3-ones. Org Lett 2018; 20:393-396. [PMID: 29319319 DOI: 10.1021/acs.orglett.7b03678] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and convenient method with wide applicability for the synthesis of C2-tetrasubstituted indolin-3-ones via copper-catalyzed redox cycloisomerization of nonprefunctionalized nitroalkynes has been developed. This protocol features simple operation, readily available starting materials, good functional group tolerance, broad scope, and diboron as the reductant.
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Affiliation(s)
- Wenqiang Fu
- Institute of Next Generation Matter Transformation, Fujian Provincial Key Laboratory of Biochemical Technology, College of Chemical Engineering, College of Materials Science and Engineering at Huaqiao University , 668 Jimei Boulevard, Xiamen, Fujian 361021, P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, Fujian Provincial Key Laboratory of Biochemical Technology, College of Chemical Engineering, College of Materials Science and Engineering at Huaqiao University , 668 Jimei Boulevard, Xiamen, Fujian 361021, P. R. China
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50
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Ma X, Deng S, Song Q. Halodifluoroacetates as formylation reagents for various amines via unprecedented quadruple cleavage. Org Chem Front 2018. [DOI: 10.1039/c8qo00727f] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Unprecedented quadruple cleavage of halodifluoromethyl compounds has been disclosed for the first time, resulting in carbonyl synthons for reaction with various amines.
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Affiliation(s)
- Xingxing Ma
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering
- College of Material Sciences Engineering at Huaqiao University
- Xiamen
- P. R. China
| | - Shuilin Deng
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering
- College of Material Sciences Engineering at Huaqiao University
- Xiamen
- P. R. China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation
- College of Chemical Engineering
- College of Material Sciences Engineering at Huaqiao University
- Xiamen
- P. R. China
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