1
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Diana EJ, Jose J, Mathew TV. Recent development in the synthesis of imidazo[1,5- a]indole derivatives: an in-depth overview. Org Biomol Chem 2024; 22:7560-7581. [PMID: 39193630 DOI: 10.1039/d4ob01131g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
In the realm of nitrogen-fused heterocycles, imidazo[1,5-a]indole and its derivatives are recognized as privileged structural patterns in various pharmaceutical drugs and biologically active natural products, emphasizing their significance. This review comprehensively explores the synthetic strategies for constructing imidazo[1,5-a]indole scaffolds, with a particular focus on transition metal-catalyzed methodologies. The primary highlighted method is [4 + 1] annulation, along with other notable approaches such as C-H activation/cyclization, enantioselective C-H annulation, intramolecular hydroamination, and double cyclization processes.
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Affiliation(s)
- Elizabeth J Diana
- Department of Chemistry, St Thomas College Palai, Arunapuram P.O., Kottayam, Kerala, 686574, India.
- Department of Chemistry, Alphonsa College Pala, Arunapuram P.O., Kottayam, Kerala, 686574, India.
| | - Jisna Jose
- Department of Chemistry, St Thomas College Palai, Arunapuram P.O., Kottayam, Kerala, 686574, India.
| | - Thomas V Mathew
- Department of Chemistry, St Thomas College Palai, Arunapuram P.O., Kottayam, Kerala, 686574, India.
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2
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Qiao XX, Zhao SN, Li Q, Ma T, Li G, He Y, Zhao XJ. Asymmetric Organocatalyzed Cyclization Cascade Reactions of 3,3-Difluoro-2-aryl-3 H-indoles and Enamides. Org Lett 2024; 26:1154-1159. [PMID: 38323790 DOI: 10.1021/acs.orglett.3c04162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
The direct functionalization of β-C(sp2)-H bonds in enamides has garnered increasing attention within the realm of organic synthesis. However, these remarkable advancements are predominantly dependent on transition metals; limited success has been achieved via organocatalytic catalysis. Herein, we report a CPA-catalyzed β-C(sp2)-H functionalization of enamides cascade intramolecular cyclization to synthesize the chiral dihydropyrimido[1,6-a]indoles bearing gem-difluoromethylene. Moreover, this methodology enables the synthesis of diverse chiral dihydropyrimido[1,6-a]indoles with outstanding enantioselectivities in moderate to high yields.
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Affiliation(s)
- Xiu-Xiu Qiao
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, School of Ethnic Medicine, Yunnan Minzu University Kunming, 650500, China
| | - Shi-Na Zhao
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, School of Ethnic Medicine, Yunnan Minzu University Kunming, 650500, China
| | - Qian Li
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, School of Ethnic Medicine, Yunnan Minzu University Kunming, 650500, China
| | - Tao Ma
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, School of Ethnic Medicine, Yunnan Minzu University Kunming, 650500, China
| | - Ganpeng Li
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, School of Ethnic Medicine, Yunnan Minzu University Kunming, 650500, China
| | - Yonghui He
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, School of Ethnic Medicine, Yunnan Minzu University Kunming, 650500, China
| | - Xiao-Jing Zhao
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, School of Ethnic Medicine, Yunnan Minzu University Kunming, 650500, China
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3
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Prusty P, Jeganmohan M. Co(III)-Catalyzed three-component assembling of N-(2-pyrimidyl) indoles with dienes and formaldehyde. Chem Commun (Camb) 2023. [PMID: 37219398 DOI: 10.1039/d3cc00875d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A highly regio- and chemoselective three-component assembling of N-pyrimidyl indoles with dienes and formaldehyde in the presence of a Co(III) catalyst was demonstrated. The scope of the reaction was investigated with a variety of indole derivatives to synthesize substituted homoallylic alcohols. Both butadiene and isoprene units were compatible with the reaction. To understand the reaction mechanism, various investigations were carried out, and suggested the plausibility of a reaction mechanism involving C-H bond activation as a key step.
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Affiliation(s)
- Priyambada Prusty
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India.
| | - Masilamani Jeganmohan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India.
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4
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Gao J, Luo K, Wei X, Wang H, Liu H, Zhou Y. Rh(III)-Catalyzed Successive C-H Activations of 2-Phenyl-3 H-indoles and Cyclization Cascades to Construct Highly Fused Indole Heteropolycycles. Org Lett 2023; 25:3341-3346. [PMID: 37144839 DOI: 10.1021/acs.orglett.3c00445] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Rh(III)-catalyzed successive C-H activations of 2-phenyl-3H-indoles and cyclization cascades with diazo compounds were developed to construct highly fused indole heteropolycycles with a broad range of substrates and good yields. In particular, this transformation included two successive C-H activations and unusual [3+3] and [4+2] sequential cyclization cascades, in which the diazo compound played a different role in the two cyclization processes, while simultaneously forming a highly fused polycyclic indole scaffold with a new quaternary carbon center.
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Affiliation(s)
- Ju Gao
- College of Pharmacy, Weifang Medical College, Weifang 261053, China
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Keyu Luo
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaohui Wei
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Hao Wang
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Hong Liu
- College of Pharmacy, Weifang Medical College, Weifang 261053, China
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu Zhou
- Drug Discovery & Development Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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5
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Das Adhikari GK, Mohanty SR, Banjare SK, Prusty N, Murmu G, Ravikumar PC. Annulation of Indole-2-Carboxamides with Bicycloalkenes Catalyzed by Ru(II) at Room Temperature: An Easy Access to β-Carboline-1-one Derivatives under Mild Conditions. J Org Chem 2023; 88:952-959. [PMID: 36606375 DOI: 10.1021/acs.joc.2c02351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Herein, we report the annulation of indole-2-carboxamides with bicycloalkenes, to synthesize β-carboline-1-one derivatives under mild conditions. The commercially available ruthenium catalyst was used for the reaction. This reaction tolerates a wide range of functional groups and affords a good yield of β-carboline-1-one derivatives. A reversible cyclometalation pathway was found to be operative in the mechanistic study.
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Affiliation(s)
- Gopal Krushna Das Adhikari
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Smruti Ranjan Mohanty
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Namrata Prusty
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Gajiram Murmu
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Ponneri C Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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6
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Wang M, Zhang J, Wang H, Ma B, Dai HX. Construction of Aza-spiro[4,5]indole Scaffolds via Rhodium-Catalyzed Regioselective C(4)—H Activation of Indole ※. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a21120588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Zhu B, Yao Z, Huang L, Cui X. Easy synthesis of imidazo[1,5- a]indol-3-ones through Rh(III)-catalyzed C-H allenylation/annulation. Chem Commun (Camb) 2021; 57:12012-12015. [PMID: 34710203 DOI: 10.1039/d1cc04359e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A highly efficient and regioselective synthesis of imidazo[1,5-a]indol-3-ones has been developed via a sequential C-H allenylation/annulation starting from easily available N-methoxycarbamoyl indoles and propargyl alcohols, in which the propargyl alcohols served as a C1 synthon. This strategy displays excellent regioselectivity, high atom economy and tolerates a broad substrate scope.
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Affiliation(s)
- Bin Zhu
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China.
| | - Zhenyu Yao
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China.
| | - Lang Huang
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China.
| | - Xiuling Cui
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China.
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8
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Yang Z, Yu JT, Pan C. Recent advances in rhodium-catalyzed C(sp 2)-H (hetero)arylation. Org Biomol Chem 2021; 19:8442-8465. [PMID: 34553744 DOI: 10.1039/d1ob01190a] [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
Arylation is a common behaviour in organic synthesis for the construction of complex structures, especially the biaryls. Among those reported arylation procedures, transition-metal-catalyzed direct C(sp2)-H arylation has been rapidly developed in recent decades and has become a reliable alternative to traditional cross-coupling procedures using organometallic reagents. Great achievements in rhodium-catalyzed C(sp2)-H arylation have been witnessed during the last decade. Aryl halides, simple arenes, aryl boronic acids, arylsilanes, aryl aldehyde, aryl carboxylic acid, diazides, etc. were successfully utilized as arylating reagents under rhodium-catalyzed conditions. In this review, recent achievements in rhodium-catalyzed arylations through C(sp2)-H bond activation were summarized together with the mechanism discussions.
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Affiliation(s)
- Zixian Yang
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P. R. China.
| | - Jin-Tao Yu
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P. R. China.
| | - Changduo Pan
- School of Chemistry & Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.
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9
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Rhodium(III)‐Catalyzed Cascade C−H Activation/Annulation of
N
‐carbamoylindoles with Silyl Enol Ethers for the Construction of Dihydropyrimidoindolone Skeletons. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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10
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Ghosh P, Das S. The C-H functionalization of N-alkoxycarbamoyl indoles by transition metal catalysis. Org Biomol Chem 2021; 19:7949-7969. [PMID: 34490862 DOI: 10.1039/d1ob01121a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Indole and its congeners are ubiquitous nitrogen-containing organic scaffolds present in a plethora of natural products, marketed drugs, and other organic functional molecules. Recent years have witnessed tremendous advances in the diversification of this motif and its biological applications via transition-metal-catalyzed auxiliary assisted site-selective inert C-H functionalization. In this burgeoning field, N-methoxy/ethoxy/pivaloxy amide functionality has emerged as a most potent auxiliary/DG (directing group) for a wide range of C-C and C-heteroatom bond formations, providing a new advance for forging structurally fabricated polycyclic indole frameworks. This review aims to highlight evolved transformations, like arylation, alkylation, alkenylation, allylation, amidation, difluorovinylation, deuteration, hydroarylation, etc., and the applications of N-alkoxycarbamoyl indole derivatives made within the period of 2014-August 2021. Additionally, explicit mechanistic underpinnings have also been provided in the appropriate places.
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Affiliation(s)
- Prasanjit Ghosh
- Department of Chemistry, University of North Bengal, Darjeeling - 734013, India.
| | - Sajal Das
- Department of Chemistry, University of North Bengal, Darjeeling - 734013, India.
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11
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Zhang J, Wang M, Wang H, Xu H, Chen J, Guo Z, Ma B, Ban SR, Dai HX. Construction of 2-alkynyl aza-spiro[4,5]indole scaffolds via sequential C-H activations for modular click chemistry libraries. Chem Commun (Camb) 2021; 57:8656-8659. [PMID: 34373875 DOI: 10.1039/d1cc02798k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Herein, we have developed a strategy of sequential C-H activations of indole to construct novel 2-alkynyl aza-spiro[4,5]indole scaffolds, which incorporated both alkyne and spiro-units into indole. Gram-scale synthesis and a one-pot, three-step synthesis demonstrated the utility of this protocol. Hybrid conjugates with an oseltamivir derivative further offered a powerful tool for the construction of a versatile spiroindole-containing library via click chemistry.
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Affiliation(s)
- Jun Zhang
- School of Pharmaceutical Science, Shanxi Medical University, 56 Xinjian South Road, Taiyuan 030001, China.
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12
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Chemo‐ and Regioselective Synthesis of Functionalized 1
H
‐imidazo[1,5‐
a
]indol‐3(2
H
)‐ones via a Redox‐Neutral Rhodium(III)‐Catalyzed [4+1] Annulation between Indoles and Alkynes. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100555] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Zhao F, Qiao J, Lu Y, Zhang X, Dai L, Liu S, Ni H, Jia X, Wu X, Lu S. Redox-Neutral Rhodium(III)-Catalyzed Chemospecific and Regiospecific [4+1] Annulation between Indoles and Alkenes for the Synthesis of Functionalized Imidazo[1,5- a]indoles. J Org Chem 2021; 86:10591-10607. [PMID: 34297561 DOI: 10.1021/acs.joc.1c01256] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Exploiting internal alkenes embedded with an oxidizing function/leaving group as a rare and unconventional one-carbon unit, a redox-neutral rhodium(III)-catalyzed chemo- and regiospecific [4+1] annulation between indoles and alkenes for the synthesis of functionalized imidazo[1,5-a]indoles has been achieved. Internal alkenes employed here can fulfill an unusual [4+1] annulation rather than normal [4+2] annulation/C-H alkenylation. This method is characterized by excellent chemo- and regioselectivity, broad substrate scope, good functional group tolerance, good to high yields, and redox-neutral conditions.
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Affiliation(s)
- Fei Zhao
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, P. R. China.,Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Jin Qiao
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Yangbin Lu
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Xiaoning Zhang
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Long Dai
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Siyu Liu
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Hangcheng Ni
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
| | - Xiuwen Jia
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, P. R. China
| | - Xiaowei Wu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China.,Zhongshan Institute for Drug Discovery, the Institutes of Drug Discovery and Development, Chinese Academy of Sciences, Zhongshan 528400, P. R. China
| | - Shiyao Lu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, P. R. China.,Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, P. R. China
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14
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Zhao F, Qiao J, Lu Y, Zhang X, Dai L, Gong X, Mao H, Lu S, Wu X, Liu S. Rh(III)-Catalyzed Divergent Synthesis of Alkynylated Imidazo[1,5- a]indoles and α,α-Difluoromethylene Tetrasubstituted Alkenes. Org Lett 2021; 23:5766-5771. [PMID: 34279111 DOI: 10.1021/acs.orglett.1c01929] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Herein, we report the divergent synthesis of alkynylated imidazo[1,5-a]indoles and α,α-difluoromethylene tetrasubstituted alkenes through Rh(III)-catalyzed [4 + 1] annulation/alkyne moiety migration and C-H alkenylation/DG migration, respectively. This protocol features tunable product selectivity, excellent chemo-, regio-, and stereoselectivity, broad substrate scope, moderate to high yields, good tolerance of functional groups, and mild redox-neutral conditions.
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Affiliation(s)
- Fei Zhao
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, China.,Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Jin Qiao
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, China
| | - Yangbin Lu
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, China
| | - Xiaoning Zhang
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, China
| | - Long Dai
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, China
| | - Xin Gong
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Hui Mao
- College of Pharmacy, Jinhua Polytechnic, Jinhua 321007, China
| | - Shiyao Lu
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, China
| | - Xiaowei Wu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,Zhongshan Institute for Drug Discovery, the Institutes of Drug Discovery and Development, Chinese Academy of Sciences, Zhongshan 528400, China
| | - Siyu Liu
- Jinhua Branch, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Jinhua 321007, China.,Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu 610106, China
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15
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Shelar SV, Argade NP. Facile synthesis of indolizinoindolone, indolylepoxypyrrolooxazole, indolylpyrrolooxazolone and isoindolopyrazinoindolone heterocycles from indole and imide derivatives. Org Biomol Chem 2021; 19:6160-6169. [PMID: 34190304 DOI: 10.1039/d1ob00754h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Chemo-, regio- and diastereoselective coupling reactions of indole with imide derivatives leading to unique heterocyclic systems are demonstrated. Acid-induced 3-position coupling reactions of indole with cyclic imide derived lactamols followed by acid promoted 2-position cyclizations with the corresponding aldehydes are described to obtain the indolizinoindolones and benzoindolizinoindolones. Base induced 2-position coupling reactions of N-tosylindole with N-(2-iodoethyl)imides and the subsequent cyclizations provide indolylepoxypyrrolooxazole, indolylpyrrolooxazolone and indolyloxazoloisoindolone. Reductive cleavage of indolyloxazoloisoindolone to the corresponding alcohol followed by mesylation and base promoted N-cyclization affords the in situ air-oxidized pentacyclic product hydroxyisoindolopyrazinoindolone. A regioisomeric structural revision of the natural product from 1,2,5,6,7,11c-hexahydro-3H-indolizino[7,8-b]indol-3-one to 1,2,5,6,11,11b-hexahydro-3H-indolizino(8,7-b)indol-3-one is also reported in the present studies focussed on the methodologies for heterocyclic synthesis.
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Affiliation(s)
- Santosh V Shelar
- Division of Organic Chemistry, National Chemical Laboratory (CSIR), Pune 411 008, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Narshinha P Argade
- Division of Organic Chemistry, National Chemical Laboratory (CSIR), Pune 411 008, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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16
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Nunewar S, Kumar S, Pandhare H, Nanduri S, Kanchupalli V. Rh(III)-Catalyzed Chemodivergent Annulations between Indoles and Iodonium Carbenes: A Rapid Access to Tricyclic and Tetracyclic N-Heterocylces. Org Lett 2021; 23:4233-4238. [PMID: 34018754 DOI: 10.1021/acs.orglett.1c01167] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Herein, we report an acid-controlled highly tunable selectivity of Rh(III)-catalyzed [4 + 2] and [3 + 3] annulations of N-carboxamide indoles with iodonium ylides lead to form synthetically important tricyclic and tetracyclic N-heterocycles. Here, iodonium ylide serves as a carbene precursor. The protocol proceeds under operationally simple conditions and provides novel tricyclic and tetracyclic scaffolds such as 3,4-dihydroindolo[1,2-c]quinazoline-1,6(2H,5H)-dione and 1H-[1,3]oxazino[3,4-a]indol-1-one derivatives with a broad range of functional group tolerance and moderate to excellent yields. Furthermore, the protocol synthetic utility was extended for various chemical transformations and was easily scaled up to a large-scale level.
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Affiliation(s)
- Saiprasad Nunewar
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana India
| | - Sanjeev Kumar
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana India
| | - Harishchandra Pandhare
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana India
| | - Srinivas Nanduri
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana India
| | - Vinaykumar Kanchupalli
- National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana India
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17
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Maiti D, Basak S, Biswas JP. Transition-Metal-Catalyzed C–H Arylation Using Organoboron Reagents. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1485-4666] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AbstractAryl rings are ubiquitous in the core of numerous natural product and industrially important molecules and thus their facile synthesis is of major interest in the scientific community and industry. Although multiple strategies enable access to these skeletons, metal-catalyzed C–H activation is promising due to its remarkable efficiency. Commercially available organoboron reagents, a prominent arylating partner in the cross-coupling domain, have also been utilized for direct arylation. Organoborons are bench-stable, inexpensive, and readily available coupling partners that promise regioselectivity, chemodivergence, cost-efficiency, and atom-economy without requiring harsh and forcing conditions. This critical, short review presents a summary of all major studies of arylation using organoborons in transition-metal catalysis since 2005.1 Introduction2 Arylation without Directing Group Assistance2.1 Palladium Catalysis2.2 Iron Catalysis2.3 Gold Catalysis3 Arylation with Directing Group Assistance3.1 Palladium Catalysis3.2 Ruthenium Catalysis3.3 Rhodium Catalysis3.4 Nickel Catalysis3.5 Cobalt Catalysis3.6 Copper Catalysis4 Conclusion
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Affiliation(s)
- Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay
| | - Sumon Basak
- Department of Chemistry, Banaras Hindu University
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18
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Xie H, Zhong M, Kang H, Shu B, Zhang S. A Cascade Rh(III)‐catalyzed C−H Activation/Chemodivergent Annulation of
N
‐carbamoylindoles with Sulfoxonium Ylides for the Synthesis of Dihydropyrimidoindolone and Tricyclic [1,3]Oxazino[3,4‐
a
]indol‐1‐ones Derivatives. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001380] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Hui Xie
- Center for Drug Research and Development Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
| | - Mei Zhong
- School of Pharmacy Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
| | - Hua‐Jie Kang
- School of Pharmacy Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
| | - Bing Shu
- School of Pharmacy Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
| | - Shang‐Shi Zhang
- Center for Drug Research and Development Guangdong Pharmaceutical University Guangzhou 510006 People's Republic of China
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19
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Ding Y, Yan H, Chen R, Xiao X, Wang Z, Wang L, Ma Y. Expeditious Approach to Indoloquinazolinones via Double Annulations of o-Aminoacetophenones and Isocyanates. J Org Chem 2021; 86:1448-1455. [PMID: 33373228 DOI: 10.1021/acs.joc.0c02155] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A novel procedure for a one-pot cascade reaction of o-aminoacetophenones and aryl/aliphatic isocyanates catalyzed/oxidized by the [Pd]/[Ag] system was developed. The reaction involves two C-N bond and one C-C bond formations during the double annulation process and the desired indoloquinazolinones and derivatives were afforded up to 81% yields from readily available substrates with a tolerance of a broad variety.
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Affiliation(s)
- Yuxin Ding
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China.,School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
| | - Huihui Yan
- School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
| | - Rener Chen
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Xuqiong Xiao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 2318 Yuhangtang Road Hangzhou 311121, P R China
| | - Zhiming Wang
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Lei Wang
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China
| | - Yongmin Ma
- Institute of Advanced Studies and School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 318000, P R China.,School of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, P R China
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20
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Kumar P, Nagtilak PJ, Kapur M. Transition metal-catalyzed C–H functionalizations of indoles. NEW J CHEM 2021. [DOI: 10.1039/d1nj01696b] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This review summarises a wide range of transformations on the indole skeleton, including arylation, alkenylation, alkynylation, acylation, nitration, borylation, and amidation, using transition-metal catalyzed C–H functionalization as the key step.
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Affiliation(s)
- Pravin Kumar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India
| | - Prajyot Jayadev Nagtilak
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India
| | - Manmohan Kapur
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India
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21
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Shu S, Huang Z, Chen Y, Yang S, Jiang Y, Zhang J, Zhao Y. Rh(III)-Catalyzed [4+2] Annulation of Indoles with Sulfoxonium Ylides for the Synthesis of Dihydropyrimidoindolone Derivatives. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202103027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Chen J, Zhong T, Zheng X, Yin C, Zhang L, Zhou J, Jiang X, Yu C. Selective Synthesis of Fused Tricyclic [1,3]oxazino[3,4‐
a
]indolone and Dihydropyrimido [1,6‐a]indolone
via
Rh(III)‐catalyzed [3+3] or [4+2] C−H Annulation. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001286] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Junyu Chen
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Tianshuo Zhong
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Xiangyun Zheng
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Chuanliu Yin
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Lei Zhang
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Jian Zhou
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Xinpeng Jiang
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Chuanming Yu
- College of Pharmaceutical Sciences Zhejiang University of Technology Hangzhou 310014 People's Republic of China
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23
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Raji Reddy C, Sathish P, Mallesh K, Lakshmi Prapurna Y. Construction of Unique Polycyclic 3, 4‐Fused Indoles
via
Rhodium(III)‐Catalyzed Domino Annulations**. ChemistrySelect 2020. [DOI: 10.1002/slct.202002689] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Chada Raji Reddy
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Puppala Sathish
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Kathe Mallesh
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500007 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Y. Lakshmi Prapurna
- Department of Organic Synthesis & Process Chemistry CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500007 India
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24
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Liu S, Pu M, Wu YD, Zhang X. Computational Study on the Fate of Oxidative Directing Groups in Ru(II), Rh(III), and Pd(II) Catalyzed C-H Functionalization. J Org Chem 2020; 85:12594-12602. [PMID: 32931704 DOI: 10.1021/acs.joc.0c01775] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Activation of C-H bonds assisted by a directing group is indispensable in organic synthesis. Among them, utilizing oxidative directing groups that can serve as an internal oxidant to drive the Mn/Mn+2 catalytic cycle has recently become a promising strategy. A survey of published reactions involving N-alkoxyamides or N-acyloxyamides reveals that not all N-O bonds act as an internal oxidant. We have therefore systematically investigated the effect of the oxidative groups on a model reaction catalyzed by Ru(II), Rh(III), and Pd(II) complexes. DFT calculations show that N-methoxy and N-acyloxy groups oxidize Ru(II) to Ru(IV) and Rh(III) to Rh(V), but cannot oxidize a cyclo-Pd(II) intermediate to Pd(IV). The stability of the metal imido intermediate 7-M (M = Ru, Rh, and Pd) controls whether the oxidation occurs or not. N-Acyloxy groups show a more pronounced selectivity than N-methoxy to oxidize Ru(II) and Rh(III) species, while no distinctive effect is observed for Pd(II).
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Affiliation(s)
- Siqi Liu
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Maoping Pu
- Shenzhen Bay Laboratory, Shenzhen 518132, P. R. China
| | - Yun-Dong Wu
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China.,Shenzhen Bay Laboratory, Shenzhen 518132, P. R. China.,Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, P. R. China
| | - Xinhao Zhang
- Shenzhen Bay Laboratory, Shenzhen 518132, P. R. China.,Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, P. R. China
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25
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Liu Y, Song H, Zhang C, Liu Y, Shi B. Copper‐Catalyzed
Modular Access to
N
‐Fused
Polycyclic Indoles and
5‐Aroyl
‐pyrrol‐2‐ones
via
Intramolecular N—H/C—H Annulation with Alkynes: Scope and Mechanism Probes. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000246] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yan‐Hua Liu
- Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
| | - Hong Song
- Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
| | - Chi Zhang
- Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
| | - Yue‐Jin Liu
- Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
| | - Bing‐Feng Shi
- Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
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26
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Tan H, Laishram RD, Zhang X, Shi G, Li K, Chen J. Rhodium-Catalyzed Spiro Indenyl Benzoxazine Synthesis via C-H Activation/Annulation of 3-Aryl-2 H
-Benzo[ b
][1,4]oxazines and Alkynes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000668] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Heng Tan
- Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; 650500 Kunming Yunnan China
| | - Ronibala Devi Laishram
- Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; 650500 Kunming Yunnan China
| | - Xuexin Zhang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; 650500 Kunming Yunnan China
| | - Guangrui Shi
- Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; 650500 Kunming Yunnan China
| | - Kangkui Li
- Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; 650500 Kunming Yunnan China
| | - Jingchao Chen
- Key Laboratory of Chemistry in Ethnic Medicinal Resources; Yunnan Minzu University; 650500 Kunming Yunnan China
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27
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Thobokholt EN, Larghi EL, Bracca ABJ, Kaufman TS. Isolation and synthesis of cryptosanguinolentine (isocryptolepine), a naturally-occurring bioactive indoloquinoline alkaloid. RSC Adv 2020; 10:18978-19002. [PMID: 35518305 PMCID: PMC9054090 DOI: 10.1039/d0ra03096a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 05/04/2020] [Indexed: 11/28/2022] Open
Abstract
Cryptosanguinolentine (isocryptolepine) is one of the minor naturally-occurring monomeric indoloquinoline alkaloids, isolated from the West African climbing shrub Cryptolepis sanguinolenta. The natural product displays such a simple and unique skeleton, which chemists became interested in well before it was found in Nature. Because of its structure and biological activity, the natural product has been targeted for synthesis on numerous occasions, employing a wide range of different strategies. Hence, discussed here are aspects related to the isolation of isocryptolepine, as well as the various approaches toward its total synthesis.
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Affiliation(s)
- Elida N Thobokholt
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina +54-341-4370477 +54-341-4370477
| | - Enrique L Larghi
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina +54-341-4370477 +54-341-4370477
| | - Andrea B J Bracca
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina +54-341-4370477 +54-341-4370477
| | - Teodoro S Kaufman
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina +54-341-4370477 +54-341-4370477
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28
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Zeng L, Lin Y, Cui S. Indole‐
N
‐Carboxylic Acids and Indole‐
N
‐Carboxamides in Organic Synthesis. Chem Asian J 2020; 15:973-985. [DOI: 10.1002/asia.201901806] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 02/07/2020] [Indexed: 12/27/2022]
Affiliation(s)
- Linwei Zeng
- Institute of Drug Discovery and DesignCollege of Pharmaceutical SciencesZhejiang University Hangzhou 310058 China
| | - Yuxin Lin
- Institute of Drug Discovery and DesignCollege of Pharmaceutical SciencesZhejiang University Hangzhou 310058 China
| | - Sunliang Cui
- Institute of Drug Discovery and DesignCollege of Pharmaceutical SciencesZhejiang University Hangzhou 310058 China
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29
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Bhattacharjee P, Boruah PK, Das MR, Bora U. Direct C–H bond activation: palladium-on-carbon as a reusable heterogeneous catalyst for C-2 arylation of indoles with arylboronic acids. NEW J CHEM 2020. [DOI: 10.1039/d0nj00735h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We report a methodology for exclusive C-2 arylated indoles without the aid of any ligand or directing group in air.
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Affiliation(s)
| | - Purna K Boruah
- Advanced Materials Group
- Materials Sciences and Technology Division
- CSIR-North East Institute of Science and Technology
- Jorhat 785006
- India
| | - Manash R Das
- Advanced Materials Group
- Materials Sciences and Technology Division
- CSIR-North East Institute of Science and Technology
- Jorhat 785006
- India
| | - Utpal Bora
- Department of Chemical Sciences
- Tezpur University
- Tezpur 784028
- India
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30
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Hussain M, Chen M, Yang S, Wang GW. Palladium-Catalyzed Heteroannulation of Indole-1-carboxamides with [60]Fullerene and Subsequent Electrochemical Transformations. Org Lett 2019; 21:8568-8571. [DOI: 10.1021/acs.orglett.9b03112] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Majid Hussain
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Muqing Chen
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Materials for Energy Conversion, and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Shangfeng Yang
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Materials for Energy Conversion, and Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Guan-Wu Wang
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
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31
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[4 + 3]-Cycloaddition of aza-o-quinone methides and azomethine imines to make 1,2,4-triazepines. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.05.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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32
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Zeng L, Sajiki H, Cui S. Multicomponent Ugi Reaction of Indole- N-carboxylic Acids: Expeditious Access to Indole Carboxamide Amino Amides. Org Lett 2019; 21:5269-5272. [PMID: 31247803 DOI: 10.1021/acs.orglett.9b01871] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel multicomponent Ugi-type reaction for the synthesis of indole carboxamide amino amides from aldehydes, amines, isocyanides, and indole- N-carboxylic acids, which were simply prepared from indoles and CO2, is described. This method provides an expeditious and practical access to indole tethered peptide units, along with the achievement of remarkable structural diversity and brevity. Gram-scale reaction was conducted to demonstrate the scalability, and the products could be transformed to new indole derivatives.
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Affiliation(s)
- Linwei Zeng
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou 310058 , China
| | - Hironao Sajiki
- Laboratory of Organic Chemistry , Gifu Pharmaceutical University , Gifu 501-1196 , Japan
| | - Sunliang Cui
- Institute of Drug Discovery and Design, College of Pharmaceutical Sciences , Zhejiang University , Hangzhou 310058 , China
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33
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Zhu G, Shi W, Gao H, Zhou Z, Song H, Yi W. Chemodivergent Couplings of N-Arylureas and Methyleneoxetanones via Rh(III)-Catalyzed and Solvent-Controlled C–H Activation. Org Lett 2019; 21:4143-4147. [PMID: 31124685 DOI: 10.1021/acs.orglett.9b01333] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guoxun Zhu
- School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Wendi Shi
- School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Hui Gao
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Zhi Zhou
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Huacan Song
- School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou, Guangdong 510275, China
| | - Wei Yi
- Key Laboratory of Molecular Target & Clinical Pharmacology and State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
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34
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Fei X, Li C, Yu X, Liu H. Rh(III)-Catalyzed Hydroarylation of Alkyne MIDA Boronates via C–H Activation of Indole Derivatives. J Org Chem 2019; 84:6840-6850. [DOI: 10.1021/acs.joc.9b00638] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xiao Fei
- State Key Laboratory of Bioengineering Reactors and Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | | | - Xinhong Yu
- State Key Laboratory of Bioengineering Reactors and Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
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35
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Rej S, Chatani N. Rhodiumkatalysierte sp 2‐ und sp 3‐C‐H‐Funktionalisierungen mit entfernbaren dirigierenden Gruppen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201808159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Supriya Rej
- Department of Applied ChemistryFaculty of EngineeringOsaka University, Suita Osaka 565-0871 Japan
| | - Naoto Chatani
- Department of Applied ChemistryFaculty of EngineeringOsaka University, Suita Osaka 565-0871 Japan
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36
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Rej S, Chatani N. Rhodium-Catalyzed C(sp 2 )- or C(sp 3 )-H Bond Functionalization Assisted by Removable Directing Groups. Angew Chem Int Ed Engl 2019; 58:8304-8329. [PMID: 30311719 DOI: 10.1002/anie.201808159] [Citation(s) in RCA: 271] [Impact Index Per Article: 54.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 10/12/2018] [Indexed: 12/25/2022]
Abstract
In recent years, transition-metal-catalyzed C-H activation has become a key strategy in the field of organic synthesis. Rhodium complexes are widely used as catalysts in a variety of C-H functionalization reactions because of their high reactivity and selectivity. The availability of a number of rhodium complexes in various oxidation states enables diverse reaction patterns to be obtained. Regioselectivity, an important issue in C-H activation chemistry, can be accomplished by using a directing group to assist the reaction. However, to obtain the target functionalized compounds, it is also necessary to use a directing group that can be easily removed. A wide range of directed C-H functionalization reactions catalyzed by rhodium complexes have been reported to date. In this Review, we discuss Rh-catalyzed C-H functionalization reactions that are aided by the use of a removable directing group such as phenol, amine, aldehyde, ketones, ester, acid, sulfonic acid, and N-heteroaromatic derivatives.
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Affiliation(s)
- Supriya Rej
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
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37
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Kim J, Shin K, Jin S, Kim D, Chang S. Oxidatively Induced Reductive Elimination: Exploring the Scope and Catalyst Systems with Ir, Rh, and Ru Complexes. J Am Chem Soc 2019; 141:4137-4146. [DOI: 10.1021/jacs.9b00364] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jinwoo Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Kwangmin Shin
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Seongho Jin
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Dongwook Kim
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalization, Institute for Basic Science (IBS), Daejeon 34141, South Korea
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38
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Zhang LB, Zhu MH, Ni SF, Wen LR, Li M. Silver-Mediated Indole (4 + 2) Dearomative Annulation with N-Radicals: A Strategy To Construct Heterocycle-Fused Indolines. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04933] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lin-Bao Zhang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, People’s Republic of China
| | - Ming-Hui Zhu
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, People’s Republic of China
| | - Shao-Fei Ni
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, People’s Republic of China
| | - Li-Rong Wen
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, People’s Republic of China
| | - Ming Li
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, People’s Republic of China
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39
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Feng S, Li S, Li J, Wei J. Palladium-catalyzed annulation of N-alkoxy benzsulfonamides with arynes by C–H functionalization: access to dibenzosultams. Org Chem Front 2019. [DOI: 10.1039/c8qo01311j] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Palladium-catalyzed C–H/N–H functionalization of N-alkoxy benzsulfonamides with arynes provides dibenzosultams via C–C/C–N bond formation, accompanied by an unexpected N–O bond cleavage.
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Affiliation(s)
- Simin Feng
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Shan Li
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Jing Li
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
| | - Junfa Wei
- School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
- P. R. China
- Key Laboratory for Macromolecular Science of Shaanxi Province
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40
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Yang Z, Jie L, Yao Z, Yang Z, Cui X. Rhodium(III)‐Catalyzed Synthesis of
N
‐(2‐Acetoxyalkyl)isoquinolones from Oxazolines and Alkynes through C−N Bond Formation and Ring‐Opening. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801217] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zi Yang
- Engineering Research Center of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences Huaqiao University Xiamen 361021 People's Republic of China
| | - Lianghua Jie
- Engineering Research Center of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences Huaqiao University Xiamen 361021 People's Republic of China
| | - Zhenyu Yao
- Engineering Research Center of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences Huaqiao University Xiamen 361021 People's Republic of China
| | - Zhimin Yang
- Instrumental Analysis Center of Huaqiao University Xiamen 361021 People's Republic of China
| | - Xiuling Cui
- Engineering Research Center of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences Huaqiao University Xiamen 361021 People's Republic of China
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41
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Jiang B, Wu S, Zeng J, Yang X. Controllable Rh(III)-Catalyzed C-H Arylation and Dealcoholization: Access to Biphenyl-2-carbonitriles and Biphenyl-2-carbimidates. Org Lett 2018; 20:6573-6577. [PMID: 30260650 DOI: 10.1021/acs.orglett.8b02915] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A controllable Rh(III)-catalyzed C-H arylation and dealcoholization of benzimidates with arylboronic esters was developed, delivering various biphenyl-2-carbonitriles and biphenyl-2-carbimidates by simply tuning the reaction conditions. This approach features high efficiency, good functional group tolerance, and easy operation. It also provides an alternative pathway to thoroughly exploit the directing group in transition-metal-catalyzed C-H activations.
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Affiliation(s)
- Bo Jiang
- Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering , Shenyang Normal University , Shenyang , Liaoning 110034 , China
| | - Songxiao Wu
- Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering , Shenyang Normal University , Shenyang , Liaoning 110034 , China
| | - Jing Zeng
- Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering , Shenyang Normal University , Shenyang , Liaoning 110034 , China
| | - Xiaobo Yang
- Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering , Shenyang Normal University , Shenyang , Liaoning 110034 , China
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42
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Peneau A, Guillou C, Chabaud L. Recent Advances in [Cp*MIII
] (M = Co, Rh, Ir)-Catalyzed Intramolecular Annulation Through C-H Activation. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800298] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Augustin Peneau
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301; Univ Paris-Sud, Université Paris-Saclay; 1 av. de la Terrasse 91198 Gif-sur-Yvette France
| | - Catherine Guillou
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301; Univ Paris-Sud, Université Paris-Saclay; 1 av. de la Terrasse 91198 Gif-sur-Yvette France
| | - Laurent Chabaud
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301; Univ Paris-Sud, Université Paris-Saclay; 1 av. de la Terrasse 91198 Gif-sur-Yvette France
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43
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Kong WJ, Chen X, Wang M, Dai HX, Yu JQ. Rapid Syntheses of Heteroaryl-Substituted Imidazo[1,5-a]indole and Pyrrolo[1,2-c]imidazole via Aerobic C2-H Functionalizations. Org Lett 2018; 20:284-287. [PMID: 29256621 PMCID: PMC5993056 DOI: 10.1021/acs.orglett.7b03596] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Here we report an aerobic Pd(0) catalyzed C2-H functionalization of indoles and pyrroles with tethered N-methoxylamide as the directing group. A Pd(0)-initiated mechanism overcomes the directing or poisoning effect from a wide range of heterocycles including pyridine, pyrimidine, and thiazole. The imidazo[1,5-a]indole products are transformed to bioactive analogs after one-step manipulations, demonstrating the potential utility of this reaction in drug discovery.
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Affiliation(s)
- Wei-Jun Kong
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 20032, China
| | - Xingrong Chen
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 20032, China
| | - Mingming Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 20032, China
| | - Hui-Xiong Dai
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 20032, China
- Department of Medicinal Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Road Zu Chong Zhi, Zhangjiang Hi-Tech Park, Shanghai, 201203, China
| | - Jin-Quan Yu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 20032, China
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, California 92037, USA
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44
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Qi J, Zheng J, Cui S. Facile synthesis of carbo- and heterocycles via Fe(iii)-catalyzed alkene hydrofunctionalization. Org Chem Front 2018. [DOI: 10.1039/c7qo00817a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile synthesis of carbo- and heterocycles via Fe(iii)-catalyzed alkene hydrofunctionalization has been developed.
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Affiliation(s)
- Jifeng Qi
- Institute of Drug Discovery and Design
- College of Pharmaceutical Sciences
- Zhejiang University
- China
| | - Jing Zheng
- School of Resources Environmental & Chemical Engineering
- Nanchang University
- Nanchang 330031
- China
| | - Sunliang Cui
- Institute of Drug Discovery and Design
- College of Pharmaceutical Sciences
- Zhejiang University
- China
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45
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Cai Z, Li S, Gao Y, Fu L, Li G. Weak, bidentate chelating group assisted cross-coupling of C(sp3)–H bonds in aliphatic acid derivatives with aryltrifluoroborates. Chem Commun (Camb) 2018; 54:12766-12769. [DOI: 10.1039/c8cc07481j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel weak, bidentate directing group enabled β-C(sp3)–H cross-coupling of aliphatic acids that contain α-hydrogen atoms with organoboron reagents.
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Affiliation(s)
- Zhihua Cai
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter
- Fuzhou
- China
- University of Chinese Academy of Science
- Beijing
| | - Shangda Li
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter
- Fuzhou
- China
| | - Yuzhen Gao
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter
- Fuzhou
- China
| | - Lei Fu
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter
- Fuzhou
- China
| | - Gang Li
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter
- Fuzhou
- China
- University of Chinese Academy of Science
- Beijing
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46
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Zhu C, Wang CQ, Feng C. Recent advance in transition-metal-catalyzed oxidant-free 4+1 annulation through C–H bond activation. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.062] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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47
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Shen Y, Cindy Lee WC, Gutierrez DA, Li JJ. Palladium-Catalyzed Direct C(sp2)–H ortho-Arylation of Anilides Using 2-Aminophenylpyrazole as the Directing Group. J Org Chem 2017; 82:11620-11625. [DOI: 10.1021/acs.joc.7b01883] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yuning Shen
- Department of Chemistry, University of San Francisco, 2130 Fulton Street, San Francisco, California 94117, United States
| | - Wan-Chen Cindy Lee
- Department of Chemistry, University of San Francisco, 2130 Fulton Street, San Francisco, California 94117, United States
| | - David A. Gutierrez
- Department of Chemistry, University of San Francisco, 2130 Fulton Street, San Francisco, California 94117, United States
| | - Jie Jack Li
- Department of Chemistry, University of San Francisco, 2130 Fulton Street, San Francisco, California 94117, United States
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48
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Reddy CR, Yarlagadda S, Sridhar B, Reddy BVS. Arylative Cyclization of Indole-1-carboxamides with 1,6-Enynes for the Synthesis of Polycyclic Indole Scaffolds. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701029] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Chatrala Ravikumar Reddy
- Centre for Semiochemicals; CSIR - Indian Institute of Chemical Technology; 500007 Hyderabad India
| | - Suresh Yarlagadda
- Centre for Semiochemicals; CSIR - Indian Institute of Chemical Technology; 500007 Hyderabad India
| | - Balasubramanian Sridhar
- Laboratory of X-ray Crystallography; CSIR - Indian Institute of Chemical Technology; 500007 Hyderabad India
| | - Basi V. Subba Reddy
- Centre for Semiochemicals; CSIR - Indian Institute of Chemical Technology; 500007 Hyderabad India
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49
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Xu Y, Zhou X, Zheng G, Li X. Sulfoxonium Ylides as a Carbene Precursor in Rh(III)-Catalyzed C–H Acylmethylation of Arenes. Org Lett 2017; 19:5256-5259. [DOI: 10.1021/acs.orglett.7b02531] [Citation(s) in RCA: 149] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Youwei Xu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xukai Zhou
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guangfan Zheng
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xingwei Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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50
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Das R, Kumar GS, Kapur M. Amides as Weak Coordinating Groups in Proximal C-H Bond Activation. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700546] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Riki Das
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhauri 462066 Bhopal MP India
| | - Gangam Srikanth Kumar
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhauri 462066 Bhopal MP India
| | - Manmohan Kapur
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road, Bhauri 462066 Bhopal MP India
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