1
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Chand S, Sharma AK, Pandey AK, Singh KN. Synthesis of unsymmetrical ketones via dual catalysed cross-coupling of α,β-unsaturated carboxylic acids with aryldiazonium salts. Chem Commun (Camb) 2023. [PMID: 38013486 DOI: 10.1039/d3cc04898e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
A visible light-enabled synthesis of unsymmetrical ketones has been accomplished by the cross-coupling of α,β-unsaturated carboxylic acids and aryldiazonium salts embracing a synergistic eosin Y and Co(OAc)2·4H2O catalysis. The reaction involves decarboxylative aerobic CC bond cleavage, and is endowed with the creation of new C-C and C-O bonds with good substrate scope.
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Affiliation(s)
- Shiv Chand
- Department of Chemistry Institute of Science Banaras Hindu University, Varanasi 221005, India.
| | - Anup Kumar Sharma
- Department of Chemistry Institute of Science Banaras Hindu University, Varanasi 221005, India.
| | - Anand Kumar Pandey
- Department of Chemistry Institute of Science Banaras Hindu University, Varanasi 221005, India.
| | - Krishna Nand Singh
- Department of Chemistry Institute of Science Banaras Hindu University, Varanasi 221005, India.
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2
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Baidya M, De Sarkar S. Synthesis of Quinoxalines through Cu-electrocatalytic Azidation/Annulation Cascade at Low Catalyst Loading. Org Lett 2023; 25:5896-5901. [PMID: 37515784 DOI: 10.1021/acs.orglett.3c02186] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2023]
Abstract
A Cu-electrocatalytic azidation of N-aryl enamines and subsequent denitrogenative annulation for the construction of quinoxaline frameworks is reported. Only 0.5 mol % of copper(II) chloride was employed for this cascade transformation displaying excellent functional-group compatibility even with complex bioactive scaffolds. The efficient electro-oxidative protocol enables the use of NaN3 as the cheapest azide source. Detailed mechanistic experiments, cyclic voltammetry, and spectroscopic studies provided strong evidence for a dual role of the Cu catalyst in azidyl and iminyl radical generation steps.
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Affiliation(s)
- Mrinmay Baidya
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India
| | - Suman De Sarkar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India
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3
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Cheng YN, Sun L, Meng H, Jiang Z, Zhang Z, Yun Y, Wang X, Yan J, Yang X, Zhou H, Li H. Structure-Activity Studies of N-Heterocyclic Benzoyl Arylamine Derivatives Led to a Highly Fungicidal Candidate against Gaeumannomyces graminis var. tritici and Four Fusarium Wheat Pathogens. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:10305-10315. [PMID: 35950372 DOI: 10.1021/acs.jafc.2c03455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Wheat root diseases can seriously reduce yields and quality of wheat. 1,2,4-Triazole benzoyl arylamine derivatives previously showed good activities against some wheat root fungal pathogens. To further systematically disclose the structure-activity relationship, a series of benzoyl arylamines were designed and prepared. Their structures were characterized and fungicidal activities against Gaeumannomyces graminis var. tritici and Fusarium graminearum were evaluated. The results indicated that the structure of the N-heterocyclic group and the substituted group and their position on the benzamide scaffold had an important influence on the activities, as predicted. Finally, compound 18f was found to show excellent activities against G. graminis var. tritici, F. graminearum, Fusarium culmorum, Fusarium pseudograminearum, and Fusarium moniliforme with half-maximum effective concentrations of 0.002, 0.093, 0.011, 0.881, and 0.287 μg/mL, respectively. These results proposed that compound 18f deserved serious consideration as a novel fungicide candidate for the control of wheat root diseases.
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Affiliation(s)
- Yi-Nan Cheng
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Liansheng Sun
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Haoguang Meng
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Zhenhua Jiang
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Zhijia Zhang
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Yuanyuan Yun
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Xiafei Wang
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Jingming Yan
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Xifa Yang
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Haifeng Zhou
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Honglian Li
- Plant Protection College of Henan Agricultural University, Zhengzhou 450002, People's Republic of China
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4
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Facile synthesis of 1-substituted 4-H phthalazine, a versatile scaffold for chemically diverse phthalazines. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Nozawa-Kumada K, Ono K, Kurosu S, Shigeno M, Kondo Y. Copper-catalyzed aerobic benzylic C(sp 3)-H lactonization of 2-alkylbenzamides via N-centered radicals. Org Biomol Chem 2022; 20:5948-5952. [PMID: 35262165 DOI: 10.1039/d2ob00281g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we describe the copper-catalyzed aerobic C(sp3)-H functionalization of 2-alkylbenzamides for the synthesis of benzolactones. This reaction proceeds via 1,5-hydrogen atom transfer of N-centered radicals directly generated by N-H bond cleavage and does not require the synthesis of pre-functionalized N-centered radical precursors or the use of strong stoichiometric oxidants.
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Affiliation(s)
- Kanako Nozawa-Kumada
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Kanako Ono
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Satoshi Kurosu
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Masanori Shigeno
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Yoshinori Kondo
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
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6
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Abe M, Nitta S, Miura E, Kimachi T, Inamoto K. Nitrile Synthesis via Desulfonylative-Smiles Rearrangement. J Org Chem 2022; 87:4460-4467. [PMID: 35229594 DOI: 10.1021/acs.joc.1c03011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we designed a simple nitrile synthesis from N-[(2-nitrophenyl)sulfonyl]benzamides via base-promoted intramolecular nucleophilic aromatic substitution. The process features redox-neutral conditions as well as no requirement of toxic cyanide species and transition metals. Our process shows broad scope and various functional group compatibility, affording a variety of (hetero)aromatic nitriles in good to excellent yields.
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Affiliation(s)
- Masahiro Abe
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Sayasa Nitta
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Erina Miura
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Tetsutaro Kimachi
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
| | - Kiyofumi Inamoto
- School of Pharmacy and Pharmaceutical Sciences, Mukogawa Women's University, 11-68, 9-Bancho, Koshien, Nishinomiya, Hyogo 663-8179, Japan
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7
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Gupta A, Kumar J, Rahaman A, Singh AK, Bhadra S. Functionalization of C(sp3)-H bonds adjacent to heterocycles catalyzed by earth abundant transition metals. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132415] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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8
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Tang C, Qiu X, Cheng Z, Jiao N. Molecular oxygen-mediated oxygenation reactions involving radicals. Chem Soc Rev 2021; 50:8067-8101. [PMID: 34095935 DOI: 10.1039/d1cs00242b] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Molecular oxygen as a green, non-toxic and inexpensive oxidant has displayed lots of advantages compared with other oxidants towards more selective, sustainable, and environmentally benign organic transformations. The oxygenation reactions which employ molecular oxygen or ambient air as both an oxidant and an oxygen source provide an efficient route to the synthesis of oxygen-containing compounds, and have been demonstrated in practical applications such as pharmaceutical synthesis and late-stage functionalization of complex molecules. This review article introduces the recent advances of radical processes in molecular oxygen-mediated oxygenation reactions. Reaction scopes, limitations and mechanisms are discussed based on reaction types and catalytic systems. Conclusions and perspectives are also given in the end.
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Affiliation(s)
- Conghui Tang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, China.
| | - Xu Qiu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Zengrui Cheng
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China. and State Key Laboratory of Organometallic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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9
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Jaiswal A, Sharma AK, Preeti, Singh KN. Copper‐Catalyzed Decarboxylative Synthesis of α‐Ketothioamides Using α,β‐Unsaturated Arylcarboxylic Acids, Alicyclic Secondary Amines and Elemental Sulfur. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Anjali Jaiswal
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Anup Kumar Sharma
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Preeti
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Krishna Nand Singh
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
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10
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Gulati U, Gandhi R, Laha JK. Benzylic Methylene Functionalizations of Diarylmethanes. Chem Asian J 2020; 15:3135-3161. [PMID: 32794651 PMCID: PMC7436909 DOI: 10.1002/asia.202000730] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/11/2020] [Indexed: 12/20/2022]
Abstract
Diarylmethanes are cardinal scaffolds by virtue of their unique structural feature including the presence of a benzylic CH2 group that can be easily functionalized to generate a variety of fascinating molecules holding immense importance in pharmaceutical, agrochemical, and material sciences. While the originally developed protocols for benzylic C-H functionalization in diarylmethanes employing base-mediated and metal-catalyzed strategies are still actively used, they are joined by a new array of metal-free conditions, offering milder and benign conditions. With the recent surge of interest towards the synthesis of functionalized diarylmethanes, numerous choices are now available for a synthetic organic chemist to transform the benzylic C-H bond to C-C or C-X bond offering the synthesis of any molecule of choice. This review highlights benzylic methylene (CH2 ) functionalizations of diaryl/heteroarylmethanes utilizing various base-mediated, transition-metal-catalyzed, and transition-metal free approaches for the synthesis of structurally diverse important organic molecules, often with a high chemo-, regio- and enantio-selectivity. This review also attempts to provide analysis of the scope and limitations, mechanistic understanding, and sustainability of the transformations.
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Affiliation(s)
- Upma Gulati
- Department of Pharmaceutical Technology (Process Chemistry)National Institute of Pharmaceutical Education and ResearchS.A.S.Nagar160062PunjabIndia
| | - Radhika Gandhi
- Department of Pharmaceutical Technology (Process Chemistry)National Institute of Pharmaceutical Education and ResearchS.A.S.Nagar160062PunjabIndia
| | - Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry)National Institute of Pharmaceutical Education and ResearchS.A.S.Nagar160062PunjabIndia
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11
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Zhu Z, Lin H, Liang B, Huang J, Liang W, Chen L, Huang Y, Chen X, Li Y. Copper-catalyzed [2+3]-annulation of N-H imines with vinyl azides: access to polyaryl 2H-imidazoles. Chem Commun (Camb) 2020; 56:5621-5624. [PMID: 32297887 DOI: 10.1039/c9cc10042c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A practical method for the synthesis of 2H-imidazoles via a [2+3] annulation of N-H imines with vinyl azides using a copper catalyst is developed. In this conversion, environmentally friendly oxygen is used as the sole oxidant and N2 and H2O are the only by-products. The catalytic transformation, operating under mild conditions, is operationally simple and is considered as a readily available catalytic system having good substrate and functional compatibility with high atom-efficiency without the need for additional ligands or additives.
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Affiliation(s)
- Zhongzhi Zhu
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Hanze Lin
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Baihui Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Junjie Huang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Wanyi Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Lu Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Yubing Huang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Xiuwen Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
| | - Yibiao Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China.
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12
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Ren X, Zhu L, Yu Y, Wang ZX, Huang X. Understanding the Chemoselectivity in Palladium-Catalyzed Three-Component Reaction of o-Bromobenzaldehyde, N-Tosylhydrazone, and Methanol. Org Lett 2020; 22:3251-3257. [PMID: 32227902 DOI: 10.1021/acs.orglett.0c01040] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
To understand the ligand-controlled palladium-catalyzed coupling of o-bromobenzaldehyde, N-tosylhydrazone, and methanol to give methyl 2-benzylbenzoic ester or methyl ether, we herein investigated the mechanisms which account for how C-C and C-O bonds are formed and why bidentate dppf/dppb ligands afford ester, whereas P(o-tolyl)3 ligand gives ether. The ester chemoselectivity of the bidentate ligands is attributed to the strong electron-donating effect that disfavors the C,Br-reductive elimination of the coupling intermediate of o-bromobenzaldehyde and N-tosylhydrazone.
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Affiliation(s)
- Xiaojian Ren
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Lei Zhu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Yinghua Yu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Zhi-Xiang Wang
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Xueliang Huang
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Fujian College, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
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13
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An Update on Distal C(
sp
3
)−H Functionalization Involving 1,5‐HAT Emerging from Nitrogen Radicals. Isr J Chem 2020. [DOI: 10.1002/ijch.201900172] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Zhu L, Ren X, Yu Y, Ou P, Wang ZX, Huang X. Palladium-Catalyzed Three-Component Coupling Reaction of o-Bromobenzaldehyde, N-Tosylhydrazone, and Methanol. Org Lett 2020; 22:2087-2092. [DOI: 10.1021/acs.orglett.0c00579] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Lei Zhu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Xiaojian Ren
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Yinghua Yu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Pengcheng Ou
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Zhi-Xiang Wang
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Xueliang Huang
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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15
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Laskar RA, Yoshikai N. Cobalt-Catalyzed, N–H Imine-Directed Arene C–H Benzylation with Benzyl Phosphates. J Org Chem 2019; 84:13172-13178. [DOI: 10.1021/acs.joc.9b01775] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Roshayed Ali Laskar
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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16
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Chen ZW, Zheng L, Liu J. Divergent Synthesis of Multisubstituted Unsymmetric Pyrroles and Pyrrolin-4-ones from Enamino Esters via Copper-Catalyzed Aerobic Dimerization. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900341] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Zhi-Wei Chen
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals; Zhejiang University of Technology; College of Pharmaceutical Sciences; Chao Wang Road 18th 310014, Hangzhou China
| | - Lei Zheng
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals; Zhejiang University of Technology; College of Pharmaceutical Sciences; Chao Wang Road 18th 310014, Hangzhou China
| | - Jin Liu
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals; Zhejiang University of Technology; College of Pharmaceutical Sciences; Chao Wang Road 18th 310014, Hangzhou China
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17
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Gao X, Han S, Zheng M, Liang A, Li J, Zou D, Wu Y, Wu Y. Transition-Metal-Free Oxidation of Benzylic C-H Bonds of Six-Membered N-Heteroaromatic Compounds. J Org Chem 2019; 84:4040-4049. [PMID: 30854850 DOI: 10.1021/acs.joc.9b00035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A novel oxidation of benzylic C-H bonds for the synthesis of diverse six-membered N-heteroaromatic aldehydes and ketones has been developed. The obvious advantages of this approach are the simple operation, mild reaction conditions, and without use of toxic reagent and transition metal. The present method should provide a useful access for the synthesis and modification of N-heterocycles.
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Affiliation(s)
- Xianying Gao
- The College of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical Biology and Organic Chemistry , Zhengzhou University , Zhengzhou 450052 , People's Republic of China
| | - Shuaijun Han
- The College of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical Biology and Organic Chemistry , Zhengzhou University , Zhengzhou 450052 , People's Republic of China
| | - Maolin Zheng
- The College of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical Biology and Organic Chemistry , Zhengzhou University , Zhengzhou 450052 , People's Republic of China
| | - Apeng Liang
- The College of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical Biology and Organic Chemistry , Zhengzhou University , Zhengzhou 450052 , People's Republic of China
| | - Jingya Li
- Tetranov Biopharm LLC and Collaborative Innovation Center of New Drug Research and Safety Evaluation , Zhengzhou 450052 , People's Republic of China
| | - Dapeng Zou
- The College of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical Biology and Organic Chemistry , Zhengzhou University , Zhengzhou 450052 , People's Republic of China
| | - Yusheng Wu
- The College of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical Biology and Organic Chemistry , Zhengzhou University , Zhengzhou 450052 , People's Republic of China.,Tetranov Biopharm LLC and Collaborative Innovation Center of New Drug Research and Safety Evaluation , Zhengzhou 450052 , People's Republic of China.,Tetranov International, Inc. , 100 Jersey Avenue, Suite A340 , New Brunswick , New Jersey 08901 , United States
| | - Yangjie Wu
- The College of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical Biology and Organic Chemistry , Zhengzhou University , Zhengzhou 450052 , People's Republic of China
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18
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Trammell R, Rajabimoghadam K, Garcia-Bosch I. Copper-Promoted Functionalization of Organic Molecules: from Biologically Relevant Cu/O 2 Model Systems to Organometallic Transformations. Chem Rev 2019; 119:2954-3031. [PMID: 30698952 DOI: 10.1021/acs.chemrev.8b00368] [Citation(s) in RCA: 157] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Copper is one of the most abundant and less toxic transition metals. Nature takes advantage of the bioavailability and rich redox chemistry of Cu to carry out oxygenase and oxidase organic transformations using O2 (or H2O2) as oxidant. Inspired by the reactivity of these Cu-dependent metalloenzymes, chemists have developed synthetic protocols to functionalize organic molecules under enviormentally benign conditions. Copper also promotes other transformations usually catalyzed by 4d and 5d transition metals (Pd, Pt, Rh, etc.) such as nitrene insertions or C-C and C-heteroatom coupling reactions. In this review, we summarized the most relevant research in which copper promotes or catalyzes the functionalization of organic molecules, including biological catalysis, bioinspired model systems, and organometallic reactivity. The reaction mechanisms by which these processes take place are discussed in detail.
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Affiliation(s)
- Rachel Trammell
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | | | - Isaac Garcia-Bosch
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
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19
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Wu K, Wang L, Colón‐Rodríguez S, Flechsig G, Wang T. Amidyl Radical Directed Remote Allylation of Unactivated sp
3
C−H Bonds by Organic Photoredox Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201811004] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Kui Wu
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Lushun Wang
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Sonivette Colón‐Rodríguez
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Gerd‐Uwe Flechsig
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Ting Wang
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
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20
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Wu K, Wang L, Colón‐Rodríguez S, Flechsig G, Wang T. Amidyl Radical Directed Remote Allylation of Unactivated sp
3
C−H Bonds by Organic Photoredox Catalysis. Angew Chem Int Ed Engl 2019; 58:1774-1778. [DOI: 10.1002/anie.201811004] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/21/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Kui Wu
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Lushun Wang
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Sonivette Colón‐Rodríguez
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Gerd‐Uwe Flechsig
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Ting Wang
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
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21
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Recent Advances in Homogeneous Metal-Catalyzed Aerobic C–H Oxidation of Benzylic Compounds. Catalysts 2018. [DOI: 10.3390/catal8120640] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Csp3–H oxidation of benzylic methylene compounds is an established strategy for the synthesis of aromatic ketones, esters, and amides. The need for more sustainable oxidizers has encouraged researchers to explore the use of molecular oxygen. In particular, homogeneous metal-catalyzed aerobic oxidation of benzylic methylenes has attracted much attention. This account summarizes the development of this oxidative strategy in the last two decades, examining key factors such as reaction yields, substrate:catalyst ratio, substrate scope, selectivity over other oxidation byproducts, and reaction conditions including solvents and temperature. Finally, several mechanistic proposals to explain the observed results will be discussed.
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22
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Jin M, Ren W, Qian DW, Yang SD. Direct Allylic C(sp3)-H Alkylation with 2-Naphthols via Cooperative Palladium and Copper Catalysis: Construction of Cyclohexadienones with Quaternary Carbon Centers. Org Lett 2018; 20:7015-7019. [DOI: 10.1021/acs.orglett.8b02910] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ming Jin
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Wei Ren
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Dang-Wei Qian
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Shang-Dong Yang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, South China University of Technology, Guangzhou 510640, P. R. China
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23
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Reddy BRP, Chowdhury S, Auffrant A, Gosmini C. Cobalt-Catalyzed Formation of Functionalized Diarylmethanes from Benzylmesylates and Aryl Halides. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800468] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Sushobhan Chowdhury
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
| | - Audrey Auffrant
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
| | - Corinne Gosmini
- LCM, CNRS, Ecole polytechnique; Université Paris-Saclay; 91228 Palaiseau France
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24
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Stateman LM, Nakafuku KM, Nagib DA. Remote C-H Functionalization via Selective Hydrogen Atom Transfer. SYNTHESIS-STUTTGART 2018; 50:1569-1586. [PMID: 29755145 PMCID: PMC5940016 DOI: 10.1055/s-0036-1591930] [Citation(s) in RCA: 289] [Impact Index Per Article: 48.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The selective functionalization of remote C-H bonds via intramolecular hydrogen atom transfer (HAT) is transformative for organic synthesis. This radical-mediated strategy provides access to novel reactivity that is complementary to closed-shell pathways. As modern methods for mild generation of radicals are continually developed, inherent selectivity paradigms of HAT mechanisms offer unparalleled opportunities for developing new strategies for C-H functionalization. This review outlines the history, recent advances, and mechanistic underpinnings of intramolecular HAT as a guide to addressing ongoing challenges in this arena.
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Affiliation(s)
- Leah M Stateman
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, USA
| | - Kohki M Nakafuku
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, USA
| | - David A Nagib
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, USA
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25
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Dauncey EM, Morcillo SP, Douglas JJ, Sheikh NS, Leonori D. Photoinduced Remote Functionalisations by Iminyl Radical Promoted C-C and C-H Bond Cleavage Cascades. Angew Chem Int Ed Engl 2018; 57:744-748. [PMID: 29114978 PMCID: PMC5814920 DOI: 10.1002/anie.201710790] [Citation(s) in RCA: 289] [Impact Index Per Article: 48.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Indexed: 11/20/2022]
Abstract
A photoinduced cascade strategy leading to a variety of differentially functionalised nitriles and ketones has been developed. These reactions rely on the oxidative generation of iminyl radicals from simple oximes. Radical transposition by C(sp3 )-(sp3 ) and C(sp3 )-H bond cleavage gives access to distal carbon radicals that undergo SH 2 functionalisations. These mild, visible-light-mediated procedures can be used for remote fluorination, chlorination, and azidation, and were applied to the modification of bioactive and structurally complex molecules.
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Affiliation(s)
| | - Sara P. Morcillo
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - James J. Douglas
- Early Chemical Development, Pharmaceutical Sciences, IMED Biotech UnitAstraZenecaMacclesfieldSK10 2NAUK
| | - Nadeem S. Sheikh
- Department of ChemistryFaculty of ScienceKing Faisal UniversityP.O. Box 380Al-Ahsa31982Saudi Arabia
| | - Daniele Leonori
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
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26
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Jiang H, Studer A. α-Aminoxy-Acid-Auxiliary-Enabled Intermolecular Radical γ-C(sp3
)−H Functionalization of Ketones. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712066] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Heng Jiang
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität; Corrensstrasse 40 48149 Münster Germany
| | - Armido Studer
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität; Corrensstrasse 40 48149 Münster Germany
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27
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Jiang H, Studer A. α-Aminoxy-Acid-Auxiliary-Enabled Intermolecular Radical γ-C(sp3
)−H Functionalization of Ketones. Angew Chem Int Ed Engl 2018; 57:1692-1696. [DOI: 10.1002/anie.201712066] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Heng Jiang
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität; Corrensstrasse 40 48149 Münster Germany
| | - Armido Studer
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität; Corrensstrasse 40 48149 Münster Germany
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28
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Dauncey EM, Morcillo SP, Douglas JJ, Sheikh NS, Leonori D. Photoinduced Remote Functionalisations by Iminyl Radical Promoted C−C and C−H Bond Cleavage Cascades. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710790] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
| | - Sara P. Morcillo
- School of ChemistryUniversity of Manchester Oxford Road Manchester M13 9PL UK
| | - James J. Douglas
- Early Chemical Development, Pharmaceutical Sciences, IMED Biotech UnitAstraZeneca Macclesfield SK10 2NA UK
| | - Nadeem S. Sheikh
- Department of ChemistryFaculty of ScienceKing Faisal University P.O. Box 380 Al-Ahsa 31982 Saudi Arabia
| | - Daniele Leonori
- School of ChemistryUniversity of Manchester Oxford Road Manchester M13 9PL UK
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29
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Dvorko MY, Shabalin DA, Schmidt EY, Ushakov IA, Trofimov BA. Synthesis of Uniquely Functionalized Pyrrolines from Hydroxypyrrolines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700776] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Marina Yu. Dvorko
- A.E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Dmitrii A. Shabalin
- A.E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Elena Yu. Schmidt
- A.E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Igor A. Ushakov
- A.E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Boris A. Trofimov
- A.E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
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30
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Ma H, Zhang X, Chen L, Yu W. A Domino Azidation/C–H Amination Approach toward Trifluoromethyl Substituted Imidazoles. J Org Chem 2017; 82:11841-11847. [DOI: 10.1021/acs.joc.7b01361] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Haichao Ma
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Xiaoyan Zhang
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Liangliang Chen
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Wei Yu
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China
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31
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Shu W, Nevado C. Visible-Light-Mediated Remote Aliphatic C−H Functionalizations through a 1,5-Hydrogen Transfer Cascade. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201609885] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Wei Shu
- Department of Chemistry; University of Zürich; Winterthurerstrasse 190 8057 Zürich Switzerland
| | - Cristina Nevado
- Department of Chemistry; University of Zürich; Winterthurerstrasse 190 8057 Zürich Switzerland
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32
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Shu W, Nevado C. Visible-Light-Mediated Remote Aliphatic C-H Functionalizations through a 1,5-Hydrogen Transfer Cascade. Angew Chem Int Ed Engl 2017; 56:1881-1884. [PMID: 28097790 DOI: 10.1002/anie.201609885] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Indexed: 01/09/2023]
Abstract
A redox-neutral, light-mediated functionalization of unactivated C(sp3 )-H bonds via iminyl radicals is presented here. A 1,5-H transfer followed by the functionalization of a C(sp2 )-H bond takes place in aqueous media producing a variety of elaborated fused ketones. Mechanistic investigations have revealed 1,5-H transfer as the reversible, rate-determining step in this transformation. Divergent scaffolds are also accessible via C(sp3 )-N bond formation upon a careful choice of the reaction additives.
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Affiliation(s)
- Wei Shu
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Cristina Nevado
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
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33
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Shu W, Lorente A, Gómez-Bengoa E, Nevado C. Expeditious diastereoselective synthesis of elaborated ketones via remote Csp 3-H functionalization. Nat Commun 2017; 8:13832. [PMID: 28082736 PMCID: PMC5241786 DOI: 10.1038/ncomms13832] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 11/04/2016] [Indexed: 12/20/2022] Open
Abstract
The quest for selective C–H functionalization reactions, able to provide new strategic opportunities for the rapid assembly of molecular complexity, represents a major focus of the chemical community. Examples of non-directed, remote Csp3–H activation to forge complex carbon frameworks remain scarce due to the kinetic stability and thus intrinsic challenge associated to the chemo-, regio- and stereoselective functionalization of aliphatic C–H bonds. Here we describe a radical-mediated, directing-group-free regioselective 1,5-hydrogen transfer of unactivated Csp3–H bonds followed by a second Csp2–H functionalization to produce, with exquisite stereoselectivity, a variety of elaborated fused ketones. This study demonstrates that aliphatic acids can be strategically harnessed as 1,2-diradical synthons and that secondary aliphatic C–H bonds can be engaged in stereoselective C–C bond-forming reactions, highlighting the potential of this protocol for target-oriented natural product and pharmaceutical synthesis. C-H activation is a powerful method to form functionalised molecules, but is particularly challenging for unactivated sp3 sites. Here the authors report a directing-group-free radical cascade process for converting vinyl azides and carboxylic acids to tetralone derivatives in high diastereoselectivity.
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Affiliation(s)
- Wei Shu
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Adriana Lorente
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Enrique Gómez-Bengoa
- Departamento de Química Orgánica I, Universidad del Pais Vasco, Apdo 1072, CP-20080 Donostia-San Sebastián, Spain
| | - Cristina Nevado
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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34
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Deville C, McKee V, McKenzie CJ. Copper-promoted methylene C–H oxidation to a ketone derivative by O2. Dalton Trans 2017; 46:709-719. [DOI: 10.1039/c6dt03349k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxime-dipyridyl ligand on a copper complex is slowly oxygenated at the benzylic C–H bond in air.
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Affiliation(s)
- Claire Deville
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- 5230 Odense M
- Denmark
| | - Vickie McKee
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- 5230 Odense M
- Denmark
| | - Christine J. McKenzie
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- 5230 Odense M
- Denmark
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35
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Gopalaiah K, Saini A, Chandrudu SN, Rao DC, Yadav H, Kumar B. Copper-catalyzed aerobic oxidative coupling of o-phenylenediamines with 2-aryl/heteroarylethylamines: direct access to construct quinoxalines. Org Biomol Chem 2017; 15:2259-2268. [DOI: 10.1039/c7ob00122c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A versatile method for synthesis of quinoxalines by Cu-catalyzed oxidative coupling of o-phenylenediamines with 2-arylethylamines is presented.
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Affiliation(s)
- Kovuru Gopalaiah
- Organic Synthesis and Catalysis Laboratory
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Anupama Saini
- Organic Synthesis and Catalysis Laboratory
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Sankala Naga Chandrudu
- Organic Synthesis and Catalysis Laboratory
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Devarapalli Chenna Rao
- Organic Synthesis and Catalysis Laboratory
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Harsh Yadav
- Crystal Lab
- Department of Physics & Astrophysics
- University of Delhi
- Delhi 110007
- India
| | - Binay Kumar
- Crystal Lab
- Department of Physics & Astrophysics
- University of Delhi
- Delhi 110007
- India
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36
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Kumar Y, Jaiswal Y, Kumar A. Copper(II)-Catalyzed Benzylic C(sp3)–H Aerobic Oxidation of (Hetero)Aryl Acetimidates: Synthesis of Aryl-α-ketoesters. J Org Chem 2016; 81:12247-12257. [DOI: 10.1021/acs.joc.6b02176] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Yogesh Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Yogesh Jaiswal
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Amit Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
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37
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Shabalin DA, Dvorko MY, Schmidt EY, Ushakov IA, Trofimov BA. Synthesis of 5-hydroxy-Δ1-pyrrolines from sec-alkyl aryl ketoximes and acetylene. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.08.088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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38
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Kumar Y, Shaw M, Thakur R, Kumar A. Copper(II)-Mediated Aerobic Oxidation of Benzylimidates: Synthesis of Primary α-Ketoamides. J Org Chem 2016; 81:6617-25. [DOI: 10.1021/acs.joc.6b01262] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yogesh Kumar
- Department
of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Mukta Shaw
- Department
of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
| | - Rima Thakur
- Department
of Chemistry, National Institute of Technology Patna, Patna 800005, Bihar, India
| | - Amit Kumar
- Department
of Chemistry, Indian Institute of Technology Patna, Bihta 801103, Bihar, India
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39
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Shabalin DA, Dvorko MY, Schmidt EY, Protsuk NI, Trofimov BA. Synthesis of 5-hydroxy-Δ1-pyrrolines from aryl isoalkyl ketoximes and acetylene in a tuned superbase medium. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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40
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Pandey G, Laha R, Singh D. Benzylic C(sp(3))-H Functionalization for C-N and C-O Bond Formation via Visible Light Photoredox Catalysis. J Org Chem 2016; 81:7161-71. [PMID: 27269307 DOI: 10.1021/acs.joc.6b00970] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A visible light mediated highly selective benzylic C-H bond functionalization for intermolecular C-N and C-O bond formation is reported. This cross-dehydrogenative coupling reaction demonstrates a straightforward protocol for incorporating the heteroaromatics to the benzylic position. Benzylic oxidation of various alkyl aryls to corresponding carbonyl compounds has also been reported.
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Affiliation(s)
- Ganesh Pandey
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences , Lucknow 226014, India
| | - Ramkrishna Laha
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences , Lucknow 226014, India
| | - Deepak Singh
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences , Lucknow 226014, India
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41
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Zheng G, Liu H, Wang M. Copper-Catalyzed Aerobic Oxidation of Azinylmethanes for Access to Trifluoromethylazinylols. CHINESE J CHEM 2016. [DOI: 10.1002/cjoc.201500918] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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42
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Deng Z, Lin JH, Xiao JC. Nucleophilic arylation with tetraarylphosphonium salts. Nat Commun 2016; 7:10337. [PMID: 26822205 PMCID: PMC4740112 DOI: 10.1038/ncomms10337] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 11/30/2015] [Indexed: 12/30/2022] Open
Abstract
Organic phosphonium salts have served as important intermediates in synthetic chemistry. But the use of a substituent on the positive phosphorus as a nucleophile to construct C–C bond remains a significant challenge. Here we report an efficient transition-metal-free protocol for the direct nucleophilic arylation of carbonyls and imines with tetraarylphosphonium salts in the presence of caesium carbonate. The aryl nucleophile generated from phosphonium salt shows low basicity and good nucleophilicity, as evidenced by the successful conversion of enolizable aldehydes and ketones. The reaction is not particularly sensitive to water, shows wide substrate scope, and is compatible with a variety of functional groups including cyano and ester groups. Compared with the arylmetallic reagents that are usually moisture sensitive, the phosphonium salts are shelf-stable and can be easily handled. Carbon based nucleophiles often are synthetically limited by the high basicity/reactivity of the starting materials. Here, the authors show that tetraarylphosphonium salts can be induced to act as C-aryl nucleophiles for the addition to carbonyls and imines.
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Affiliation(s)
- Zuyong Deng
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jin-Hong Lin
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Ji-Chang Xiao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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43
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Mao H, Wang L, Zhao F, Wu J, Huo H, Yu J. Cobalt-catalyzed Aerobic Oxidation of Eugenol to Vanillin and Vanillic Acid. J CHIN CHEM SOC-TAIP 2016. [DOI: 10.1002/jccs.201500357] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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44
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Tsang ASK, Kapat A, Schoenebeck F. Factors That Control C–C Cleavage versus C–H Bond Hydroxylation in Copper-Catalyzed Oxidations of Ketones with O2. J Am Chem Soc 2016; 138:518-26. [DOI: 10.1021/jacs.5b08347] [Citation(s) in RCA: 126] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Althea S.-K. Tsang
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Ajoy Kapat
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Franziska Schoenebeck
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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45
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Sterckx H, De Houwer J, Mensch C, Caretti I, Tehrani KA, Herrebout WA, Van Doorslaer S, Maes BUW. Mechanism of the Cu II-catalyzed benzylic oxygenation of (aryl)(heteroaryl)methanes with oxygen. Chem Sci 2016; 7:346-357. [PMID: 29861987 PMCID: PMC5952523 DOI: 10.1039/c5sc03530a] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 09/29/2015] [Indexed: 12/24/2022] Open
Abstract
A mechanistic study of the copper-catalyzed oxidation of the methylene group of aryl(di)azinylmethanes was performed. Initial reaction rates were measured making use of in situ IR reaction monitoring and a kinetic analysis of the reaction was executed. The reaction proved to be first order in oxygen concentration. For substrate and acid concentration, saturation kinetics due to O2 mass transfer limitation were observed. The occurrence of mass transfer limitation was further confirmed by examining the effect of the stirring rate on the initial reaction rate. Interestingly, the effect of the concentration of the catalyst on the rate shows that higher loadings result in a maximal initial rate, followed initially by a steady decrease and subsequently a rate plateau when the concentration is increased further. Mass transfer limitation and increased concentration of dinuclear catalytically active species rationalizes this hitherto unprecedented rate behavior. Continuous-wave and pulsed electron paramagnetic resonance methods were used to characterize the catalytic species present in the solution during the reaction and confirmed the presence of both mono- and dinuclear copper species. Analysis of a diverse substrate scope points towards imine-enamine tautomerization as a crucial process in the oxidation reaction. DFT calculations of these equilibrium constants (pKeq) provided us with a qualitative tool to predict whether or not a substrate is viable for oxidation under the reaction conditions developed.
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Affiliation(s)
- Hans Sterckx
- Department of Chemistry , University of Antwerp , Groenenborgerlaan 171 , B-2020 Antwerp , Belgium .
| | - Johan De Houwer
- Department of Chemistry , University of Antwerp , Groenenborgerlaan 171 , B-2020 Antwerp , Belgium .
| | - Carl Mensch
- Department of Chemistry , University of Antwerp , Groenenborgerlaan 171 , B-2020 Antwerp , Belgium .
| | - Ignacio Caretti
- Department of Physics , University of Antwerp , Universiteitsplein 1 , B-2610 Antwerp , Belgium
| | | | - Wouter A Herrebout
- Department of Chemistry , University of Antwerp , Groenenborgerlaan 171 , B-2020 Antwerp , Belgium .
| | - Sabine Van Doorslaer
- Department of Physics , University of Antwerp , Universiteitsplein 1 , B-2610 Antwerp , Belgium
| | - Bert U W Maes
- Department of Chemistry , University of Antwerp , Groenenborgerlaan 171 , B-2020 Antwerp , Belgium .
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Li D, Yang T, Su H, Yu W. tert-Butyl Hydroperoxide and Tetrabutylammonium Iodide-Promoted Free Radical Cyclization of α-Imino-N-arylamides and α-Azido-N-arylamides. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500305] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Zhou W, Fan W, Jiang Q, Liang YF, Jiao N. Copper-Catalyzed Aerobic Oxidative C–C Bond Cleavage of Unstrained Ketones with Air and Amines. Org Lett 2015; 17:2542-5. [DOI: 10.1021/acs.orglett.5b01114] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wang Zhou
- College
of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Wenyou Fan
- College
of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Qijian Jiang
- College
of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Yu-Feng Liang
- State
Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical
Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China
| | - Ning Jiao
- State
Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical
Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, China
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Han J, Shen Y, Sun X, Yao Q, Chen J, Deng H, Shao M, Fan B, Zhang H, Cao W. CuII-Promoted Aerobic Cascade Reactions of 2-Alkynylanilines with Methyl Perfluoroalk-2-ynoates: En Route to 4-Carbonyl-2-perfluoroalkylquinolines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403633] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Tnay YL, Chiba S. Copper-Catalyzed Aerobic CC Bond Cleavage of Lactols with N-Hydroxy Phthalimide for Synthesis of Lactones. Chem Asian J 2014; 10:873-7. [DOI: 10.1002/asia.201403196] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 11/03/2014] [Indexed: 12/20/2022]
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