1
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Li S, Liu W, Xia XF. Silver-catalyzed nitrosation and nitration of aromatic amides using NOBF 4. Org Biomol Chem 2023; 21:9428-9432. [PMID: 37990946 DOI: 10.1039/d3ob01729j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
Divergent aromatic ring nitrosation and nitration of aromatic amides are reported using NOBF4 as the electrophile under silver-catalyzed conditions. The reactions proceed efficiently with a wide range of compatible functionalities providing ortho-position nitrosation products, deacylation nitrosation products, and nitration products from different tertiary and secondary aromatic amides.
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Affiliation(s)
- Sa Li
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, China.
| | - Wentao Liu
- Industry and Information Technology Development Center of Yinan County, Linyi, Shandong, 276300, China
| | - Xiao-Feng Xia
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, China.
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2
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Niu RH, Zhang J, Zhao RY, Luo QJ, Li JH, Sun B. Cobalt(III)-Catalyzed Directed C-7 Selective C-H Alkynylation of Indolines with Bromoalkynes. Org Lett 2023; 25:5411-5415. [PMID: 37458331 DOI: 10.1021/acs.orglett.3c01584] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
A cobalt(III)-catalyzed directed C-7 alkynylation of indolines with easily accessible bromoalkynes has been developed. The reaction has a broad substrate scope with excellent yields and represents a powerful route to the synthesis of 7-alkynyl-substituted indolines. In addition, the reaction can be extended to the coupling of N-aryl 7-azaindoles, highlighting the synthetic practicability of the strategy.
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Affiliation(s)
- Rui-Han Niu
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Jing Zhang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Ru-Yuan Zhao
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Quan-Jian Luo
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
| | - Jin-Heng Li
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Bo Sun
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong 266042, China
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3
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Kumar M, Rastogi A, Raziullah, Ahmad A, Gangwar MK, Koley D. Cu(II)-Catalyzed, Site Selective Sulfoximination to Indole and Indolines via Dual C-H/N-H Activation. Org Lett 2022; 24:8729-8734. [PMID: 36444657 DOI: 10.1021/acs.orglett.2c02817] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A copper-catalyzed protocol furnishing N-arylated sulfoximines has been developed via dual N-H/C-H activation. Arylalkyl- and less reactive diarylsulfoximines were efficiently coupled with privileged scaffolds like indolines, indoles, and N-Ar-7-azaindoles. Sulfoximines based on medicinally relevant scaffolds (phenothiazine, dibenzothiophene, thioxanthenone) were also well tolerated. Detailed mechanistic studies indicate that the deprotometalation and protodemetalation step is the reversible step.
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Affiliation(s)
- Mohit Kumar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Anushka Rastogi
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Raziullah
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Ashfaq Ahmad
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Manoj Kumar Gangwar
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Dipankar Koley
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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4
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Zhao X, Yang F, Wang LL, Guo J, Xu YQ, Chen ZS, Ji K. Cu( ii)-Catalyzed C2-site functionalization of p-aminophenols: an approach for selective cross-dehydrogenative aminations. Org Chem Front 2022. [DOI: 10.1039/d1qo01675j] [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
Site selective cross dehydrogenative aminations from precursors without preactivated C–H and N–H bonds have been challenging.
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Affiliation(s)
- Xin Zhao
- College of Chemistry and Pharmacy, Northwest A&F University; Shaanxi Key Laboratory of Natural Products & Chemical Biology, 3 Taicheng Road, Yangling, 712100, Shaanxi, P. R. China
- School of Pharmacy, Baotou Medical College, Baotou 014060, Inner Mongolia, P. R. China
| | - Fang Yang
- College of Chemistry and Pharmacy, Northwest A&F University; Shaanxi Key Laboratory of Natural Products & Chemical Biology, 3 Taicheng Road, Yangling, 712100, Shaanxi, P. R. China
| | - Lin-Lin Wang
- College of Chemistry and Pharmacy, Northwest A&F University; Shaanxi Key Laboratory of Natural Products & Chemical Biology, 3 Taicheng Road, Yangling, 712100, Shaanxi, P. R. China
| | - Jing Guo
- College of Chemistry and Pharmacy, Northwest A&F University; Shaanxi Key Laboratory of Natural Products & Chemical Biology, 3 Taicheng Road, Yangling, 712100, Shaanxi, P. R. China
| | - Yu-Qin Xu
- College of Chemistry and Pharmacy, Northwest A&F University; Shaanxi Key Laboratory of Natural Products & Chemical Biology, 3 Taicheng Road, Yangling, 712100, Shaanxi, P. R. China
| | - Zi-Sheng Chen
- College of Chemistry and Pharmacy, Northwest A&F University; Shaanxi Key Laboratory of Natural Products & Chemical Biology, 3 Taicheng Road, Yangling, 712100, Shaanxi, P. R. China
| | - Kegong Ji
- College of Chemistry and Pharmacy, Northwest A&F University; Shaanxi Key Laboratory of Natural Products & Chemical Biology, 3 Taicheng Road, Yangling, 712100, Shaanxi, P. R. China
- Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
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5
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Tong Z, Peng X, Tang Z, Yang W, Deng W, Yin SF, Kambe N, Qiu R. DTBP-mediated cross-dehydrogenative coupling of 3-aryl benzofuran-2(3 H)-ones with toluenes/phenols for all-carbon quaternary centers. RSC Adv 2022; 12:35215-35220. [DOI: 10.1039/d2ra06231c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022] Open
Abstract
We have developed a transition-metal free protocol for efficient cross-dehydrogenative coupling of 3-aryl benzofuran-2(3H)-ones and toluenes/phenols using DTBP as an oxidant.
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Affiliation(s)
- Zhou Tong
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Xinju Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Zhi Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Weijun Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Wei Deng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Shuang-Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Nobuaki Kambe
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Renhua Qiu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
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6
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Dutta HS, Ahmad A, Khan AA, Kumar M, Raziullah, Vaishnav J, Gangwar M, Ampapathi RS, Koley D. Diastereoselective [3 + 2] Cycloaddition of Quinoxalin-2(1 H)-ones with Donor-Acceptor Cyclopropanes: Efficient Synthesis of Tetrahydro pyrrolo[1,2- a]quinoxalin-4(5 H)-ones. J Org Chem 2021; 86:16558-16572. [PMID: 34780178 DOI: 10.1021/acs.joc.1c01872] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A ytterbium triflate-catalyzed diastereoselective [3 + 2] cycloaddition of quinoxalinones with donor-acceptor cyclopropanes and cyclobutanes is described. A series of tetrahydropyrrolo-quinoxalinone derivatives were obtained in high yields (up to 96%) with excellent diastereoselectivities (up to 46:1). Other medicinally important heterocycles like benzoxazinone, isoquinoxalinone, and dibenzoxazepine derivatives were also suitable for the desired annulation reaction. The current method is applicable for the scale-up reaction. Further, the utility of this annulation reaction is demonstrated by the synthesis of densely functionalized proline derivatives.
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Affiliation(s)
| | - Ashfaq Ahmad
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Afsar Ali Khan
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Mohit Kumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Raziullah
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Jayanti Vaishnav
- SAIF, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Manoj Gangwar
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom Of Saudi Arabia
| | | | - Dipankar Koley
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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7
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Kumar M, Raziullah, Ahmad A, Dutta HS, Khan AA, Rastogi A, Kant R, Koley D. Cu(II)-Catalyzed C-N, C-O, C-Cl, C-S, and C-Se Bond Formation via C(sp 2)-H Activation Using 7-Azaindole as an Intrinsic Directing Group. J Org Chem 2021; 86:15185-15202. [PMID: 34696586 DOI: 10.1021/acs.joc.1c01811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A general protocol has been developed for the construction of carbon-heteroatom (C-N, C-Cl, C-O, C-S, and C-Se) bonds using the bench stable, earth-abundant, and environmentally benign copper catalyst. Only oxygen is sufficient to regenerate the copper catalyst. Control experiments suggested that the proto-demetalation step is reversible. Depending on the coupling partner, the reaction follows either disproportionation or radical pathways to complete the catalytic cycle. The synthetic utility of the developed protocol has been demonstrated via various functional group transformations.
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Affiliation(s)
- Mohit Kumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Raziullah
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Ashfaq Ahmad
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | | | - Afsar Ali Khan
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Anushka Rastogi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ruchir Kant
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Dipankar Koley
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.,Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
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8
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Xiao EK, Wu XT, Ma F, Miao LW, Jiang YJ, Chen P. Iron-catalyzed alkylation of carbazole derivatives via hydroarylation of styrenes. Chem Commun (Camb) 2021; 57:7148-7151. [PMID: 34184010 DOI: 10.1039/d1cc02449c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first direct and selective 3,6-di-alkylation of carbazoles via iron-catalyzed hydroarylation of styrenes is demonstrated. This simple, general and efficient method could deliver a wide range of di-benzyl-carbazoles with high chemo- and regio-selectivity at room temperature in up to 96% yield with no need for a noble-metal catalyst, directing group or additives.
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Affiliation(s)
- En-Kai Xiao
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P. R. China.
| | - Xian-Tao Wu
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P. R. China.
| | - Feng Ma
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P. R. China.
| | - Le-Wei Miao
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P. R. China.
| | - Yi-Jun Jiang
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P. R. China.
| | - Peng Chen
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P. R. China.
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9
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Wu XT, Xiao EK, Ma F, Yin J, Wang J, Chen P, Jiang YJ. Substrate-Controlled Regiodivergent Synthesis of Fluoroacylated Carbazoles via Friedel-Crafts Acylation. J Org Chem 2021; 86:6734-6743. [PMID: 33852307 DOI: 10.1021/acs.joc.1c00473] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A general, efficient, and substrate-controlled regiodivergent trifluoroacetylation of carbazoles has been developed through Friedel-Crafts acylation. This strategy was applicable to a wide scope of readily available substituted carbazoles at air atmosphere without using a metal catalyst, affording the corresponding trifluoroacetylated carbazoles in up to 99% yield. The divergency of the products and the orientation rules have been illustrated based on different substituents on carbazole rings. This method could also be extended to the synthesis of chlorodifluoroacetylated and pentafluoropropionylated carbazoles, which have been achieved for the first time.
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Affiliation(s)
- Xian-Tao Wu
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - En-Kai Xiao
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Feng Ma
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Jin Yin
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Jie Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Key Laboratory of Magnetic Resonance in Biological Systems, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, People's Republic of China
| | - Peng Chen
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Yi-Jun Jiang
- School of Materials Science and Chemical Engineering, Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, People's Republic of China
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10
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Raziullah, Kumar M, Khan AA, Dutta HS, Ahmad A, Vaishnav J, Kant R, Ampapathi RS, Koley D. Ru(II)‐Catalyzed Regioselective Hydroarylative Coupling of Indolines with Internal Alkynes by C−H Activation. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100085] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Raziullah
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute Lucknow 226031 India
| | - Mohit Kumar
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Afsar Ali Khan
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | | | - Ashfaq Ahmad
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute Lucknow 226031 India
| | | | - Ruchir Kant
- Molecular and Structural Biology Division CSIR-Central Drug Research Institute Lucknow 226031 India
| | - Ravi Sankar Ampapathi
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- SAIF CSIR-Central Drug Research Institute Lucknow 226031 India
| | - Dipankar Koley
- Medicinal and Process Chemistry Division CSIR-Central Drug Research Institute Lucknow 226031 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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11
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Aneeja T, Neetha M, Afsina CMA, Anilkumar G. Progress and prospects in copper-catalyzed C-H functionalization. RSC Adv 2020; 10:34429-34458. [PMID: 35514395 PMCID: PMC9056871 DOI: 10.1039/d0ra06518h] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/02/2020] [Indexed: 01/21/2023] Open
Abstract
Copper-catalyzed C-H functionalization is becoming a significant area in organic chemistry. Copper is now widely used as a catalyst in organic synthesis as it is inexpensive and not very toxic. Functionalization of C-H bonds to construct wide varieties of organic compounds has received much attention in recent times. This review focuses on the recent advances in Cu-catalyzed C-H functionalization and covers literature from 2018-2020.
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Affiliation(s)
- Thaipparambil Aneeja
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P.O. Kottayam Kerala 686560 India (+91) 481-2731036
| | - Mohan Neetha
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P.O. Kottayam Kerala 686560 India (+91) 481-2731036
| | - C M A Afsina
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P.O. Kottayam Kerala 686560 India (+91) 481-2731036
| | - Gopinathan Anilkumar
- School of Chemical Sciences, Mahatma Gandhi University Priyadarsini Hills P.O. Kottayam Kerala 686560 India (+91) 481-2731036
- Advanced Molecular Materials Research Centre (AMMRC), Mahatma Gandhi University Priyadarsini Hills P.O. Kottayam Kerala 686560 India
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University Priyadarsini Hills P.O. Kottayam Kerala 686560 India
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12
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Ahmad A, Dutta HS, Kumar M, Khan AA, Raziullah, Koley D. Pd-Catalyzed C-H Halogenation of Indolines and Tetrahydroquinolines with Removable Directing Group. Org Lett 2020; 22:5870-5875. [PMID: 32657591 DOI: 10.1021/acs.orglett.0c01963] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pd-catalyzed directing-group-assisted regioselective halogenations to C7 of indolines and C8 of tetrahydroquinolines were achieved in good to excellent yields. The practicality and utility of the developed method have been illustrated by various functional group transformations such as arylation, alkenylation, cyanation, and silylation utilizing the installed synthetic handle. The concise synthesis of primaquine, an antimalarial drug, and formal syntheses of two bioactive natural products, hippadine and pratosine, have also been demonstrated.
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Affiliation(s)
- Ashfaq Ahmad
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | | | - Mohit Kumar
- Academy of Scientific and Innovative Research, New Delhi 110001, India
| | - Afsar Ali Khan
- Academy of Scientific and Innovative Research, New Delhi 110001, India
| | - Raziullah
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Dipankar Koley
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India.,Academy of Scientific and Innovative Research, New Delhi 110001, India
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13
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Qi P, Sun F, Chen N, Du H. Cross-Dehydrogenative Coupling of Azoarenes with Dialkyl Disulfides. J Org Chem 2020; 85:8588-8596. [DOI: 10.1021/acs.joc.0c00953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Peng Qi
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
| | - Fang Sun
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
| | - Ning Chen
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
| | - Hongguang Du
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
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14
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Yang Y, Zhang D, Vessally E. Direct Amination of Aromatic C-H Bonds with Free Amines. Top Curr Chem (Cham) 2020; 378:37. [PMID: 32236795 DOI: 10.1007/s41061-020-0300-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 03/07/2020] [Indexed: 02/01/2023]
Abstract
Aromatic amines belong to a highly important class of organic compounds which are found in various natural products, functional materials, and pharmaceutical agents. Their prevalence has sparked continuing interest in the development of highly efficient and environmentally benign synthetic strategies for the construction of these compounds. Cross-dehydrogenative coupling reactions between two unmodified C(X)-H bonds have recently emerged as a versatile and powerful strategy for the fabrication of new C(X)-C(X) bonds. In this context, several procedures have been reported for the synthesis of aromatic amines through the direct amination of aromatic C-H bonds with free amines. This review highlights recent advances and progress in this appealing research arena, with special emphasis on the mechanistic features of the reactions.
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Affiliation(s)
- Yafeng Yang
- School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China
| | - Dangquan Zhang
- School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China.
| | - Esmail Vessally
- Department of Chemistry, Payame Noor University, Tehran, Iran
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15
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Kumar M, Sharma R, Raziullah, Khan AA, Ahmad A, Dutta HS, Koley D. Cu(II)-Catalyzed Ortho C(sp 2)-H Diarylamination of Arylamines To Synthesize Triarylamines. Org Lett 2020; 22:2152-2156. [PMID: 32129076 DOI: 10.1021/acs.orglett.0c00196] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A copper-catalyzed, directed ortho C-H diarylamination of indoles, indolines, anilines, and N-aryl-7-azaindoles has been established. Only copper salt as the catalyst and oxygen as the terminal oxidant are used to synthesize triarylamines using various diarylamines including carbazole and phenothiazine. Mechanistic interrogation reveals that copper plays a dual role.
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Affiliation(s)
- Mohit Kumar
- Academy of Scientific and Innovative Research, New Delhi, 110001, India
| | - Rishabh Sharma
- National Institute of Pharmaceutical Education and Research, Chunilal Bhawan, 168, Manicktala Road, Kolkata, 700054, India
| | - Raziullah
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Afsar Ali Khan
- Academy of Scientific and Innovative Research, New Delhi, 110001, India
| | - Ashfaq Ahmad
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | | | - Dipankar Koley
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India.,Academy of Scientific and Innovative Research, New Delhi, 110001, India
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Beske M, Tapmeyer L, Schmidt MU. Crystal structure of sodium ethoxide (C2H5ONa), unravelled after 180 years. Chem Commun (Camb) 2020; 56:3520-3523. [DOI: 10.1039/c9cc08907a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
180 years after Liebig's synthesis, the crystal structures of C2H5ONa and C2H5ONa·2C2H5OH were finally determined.
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Affiliation(s)
- Maurice Beske
- Goethe University
- Institute of Inorganic and Analytical Chemistry
- 60438 Frankfurt am Main
- Germany
| | - Lukas Tapmeyer
- Goethe University
- Institute of Inorganic and Analytical Chemistry
- 60438 Frankfurt am Main
- Germany
| | - Martin U. Schmidt
- Goethe University
- Institute of Inorganic and Analytical Chemistry
- 60438 Frankfurt am Main
- Germany
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