1
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Liang M, He M, Zhong Z, Wan B, Du Q, Mai S. Catalytic and Base-free Suzuki-type α-Arylation of Cyclic 1,3-Dicarbonyls via a Cyclic Iodonium Ylide Strategy. Angew Chem Int Ed Engl 2024; 63:e202400741. [PMID: 38385585 DOI: 10.1002/anie.202400741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/12/2024] [Accepted: 02/21/2024] [Indexed: 02/23/2024]
Abstract
To date, it remains challenging to achieve a general and catalytic α-arylation of cyclic 1,3-dicarbonyls, particularly ubiquitous heteroaromatic ones. In most cases, the preparation of their medically significant arylated derivatives requires multistep synthetic sequences. Herein, we introduce a new, convenient strategy involving the conversion of cyclic 1,3-dicarbonyls to cyclic iodonium ylides (CIYs), followed by rhodium-catalyzed α-arylation with arylboronic reagents via carbene coupling. This approach is mild, operationally simple, base-free, biocompatible, and exhibits broad substrate scope (>100 examples), especially with respect to various heteroaromatic 1,3-dicarbonyls and ortho-substituted or base-sensitive arylboronic acids. Importantly, owing to the excellent compatibility with various arylboronic acids or boronate esters (ArBpin, ArBneop, or ArBF3K), this method allows the late-stage installation of heterocyclic 1,3-dicarbonyl motifs in highly complex settings. The utility of this transformation is further demonstrated through significantly simplifying the synthesis of several bioactive molecules and natural products.
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Affiliation(s)
- Mingxuan Liang
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Mengling He
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Zhiqing Zhong
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Bei Wan
- Centre of General Practice The Seventh Affiliated Hospital, Southern Medical University, Foshan, 528000, China
| | - Qingfeng Du
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
- Centre of General Practice The Seventh Affiliated Hospital, Southern Medical University, Foshan, 528000, China
- Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Shaoyu Mai
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
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2
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Zhang Z, Su B, Zhong F, Zhu Y, Zhou Y, Mai S, Tao H. Ru(II)-Catalyzed Carboamination of Olefins with α-Carbonyl Sulfoxonium Ylides. J Org Chem 2024; 89:5382-5391. [PMID: 38556754 DOI: 10.1021/acs.joc.3c02788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
The first ruthenium-catalyzed carboamination of olefins with α-carbonyl sulfoxonium ylides is reported. The utilization of an inexpensive ruthenium catalyst enables the concise synthesis of pharmaceutically important isoindolin-1-ones, which possess both a stereogenic center and β-carbonyl side chain. This method is mild, efficient, and scalable and allows for the coupling of a wide range of aryl-, heteroaryl-, alkenyl-, and alkyl-substituted sulfoxonium ylides. Moreover, the carbonyl side chain in the resulting product provides a good handle for downstream transformations. For mechanistic studies, a ruthacyle complex is obtained and proven to be the key intermediate in both catalytic and stoichiometric reactions.
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Affiliation(s)
- Zhenwei Zhang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Borong Su
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Fuhong Zhong
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Yongyan Zhu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Guangzhou 510515, China
| | - Yao Zhou
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China
| | - Shaoyu Mai
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Guangzhou 510515, China
| | - Huaming Tao
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Guangzhou 510515, China
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3
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Zhang Z, Su B, Gong J, Tao H, Mai S. Rhodium-Catalyzed Difunctionalization of Alkenes Using Cyclic 1,3-Dicarbonyl-Derived Iodonium Ylides. Org Lett 2024; 26:1886-1890. [PMID: 38415611 DOI: 10.1021/acs.orglett.4c00186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Herein, we introduce an iodonium ylide strategy to achieve novel α-alkylation of cyclic 1,3-dicarbonyls through harnessing C(sp3)-Rh species generated from 5-exo-trig cyclization to provide rapid access to molecular hybridization of medically important isoindolin-1-ones and cyclic 1,3-dicarbonyls from readily available substrates. This approach features mild conditions, good yield, excellent functional group tolerance, and the simultaneous formation of two new chemical bonds and one stereogenic center. Moreover, the hydroxyl group of resulting product provides a good handle for downstream transformations. Importantly, we also demonstrate this strategy can be achieved in a one-pot manner. A C(sp3)-Rh complex was prepared and proved to be the key intermediate.
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Affiliation(s)
- Zhenwei Zhang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Borong Su
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Jiajun Gong
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Huaming Tao
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Guangzhou 510515, China
| | - Shaoyu Mai
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
- Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Guangzhou 510515, China
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4
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Meena N, Nipate DS, Swami PN, Rangan K, Kumar A. Ru(II)-Catalyzed [4 + 2]-Annulation of 2-Alkenyl/Arylimidazoles with N-Substituted Maleimides and 1,4-Naphthoquinones: Access to Imidazo-Fused Polyheterocycles. J Org Chem 2024; 89:2272-2282. [PMID: 38305185 DOI: 10.1021/acs.joc.3c02229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Synthesis of imidazo-fused polyheterocyclic molecular frameworks, viz. imidazo[1,2-a]pyrrolo[3,4-e]pyridines, imidazo[2,1-a]pyrrolo[3,4-c]isoquinolines, and benzo[g]imidazo[1,2-a]quinoline-6,11-diones, has been achieved by the ruthenium(II)-catalyzed [4 + 2] C-H/N-H annulation of 2-alkenyl/2-arylimidazoles with N-substituted maleimides and 1,4-naphthoquinones. The developed protocol is operationally simple, exhibits broad substrate scope with excellent functional group tolerance, and provides the desired products in moderate to good yields. The mechanistic studies suggest that the reaction involves the formation of a C-C bond through Ru-catalyzed C(sp2)-H bond activation followed by intramolecular cyclization.
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Affiliation(s)
- Neha Meena
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani, Rajasthan 333031, India
| | - Dhananjay S Nipate
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani, Rajasthan 333031, India
| | - Prakash N Swami
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani, Rajasthan 333031, India
| | - Krishnan Rangan
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Hyderabad, Telangana 500078, India
| | - Anil Kumar
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani, Rajasthan 333031, India
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5
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Vijayakumar A, Manod M, Krishna RB, Mathew A, Mohan C. Diversely functionalized isoquinolines and their core-embedded heterocyclic frameworks: a privileged scaffold for medicinal chemistry. RSC Med Chem 2023; 14:2509-2534. [PMID: 38107174 PMCID: PMC10718595 DOI: 10.1039/d3md00248a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 08/23/2023] [Indexed: 12/19/2023] Open
Abstract
Isoquinoline-enrooted organic small-molecules represent a challenging molecular target in the organic synthesis arsenal attributed to their structural diversity and therapeutic importance. Into the bargain, isoquinolines are significant structural frameworks in modern medicinal chemistry and drug development. Consequently, synthetic organic and medicinal chemists have been intensely interested in efficient synthetic tactics for the sustainable construction of isoquinoline frameworks and their derivatives in enantiopure or racemic forms. This review accentuates an overview of the literature on the modern synthetic approaches exploited in synthesising isoquinolines and their core embedded heterocyclic skeletons from 2021 to 2022. In detail, the methodologies and inspected pharmacological studies for the array of diversely functionalized isoquinolines or their core-embedded heterocyclic/carbocyclic structures involving the introduction of substituents at C-1, C-3, and C-4 carbon and N-2 atom, bond constructions at the C1-N2 atom and C3-N2 atom, and structural scaffolding within isoquinoline compounds have been reviewed. This intensive study highlights the need for and relevance of relatively unexplored bioisosterism employing isoquinoline-based small-molecules in drug design.
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Affiliation(s)
- Archana Vijayakumar
- School of Chemical Sciences, Mahatma Gandhi University Kottayam 686560 India
| | - M Manod
- School of Chemical Sciences, Mahatma Gandhi University Kottayam 686560 India
| | - R Bharath Krishna
- Institute for Integrated Programmes and Research in Basic Sciences, Mahatma Gandhi University Kottayam 686560 India
| | - Abra Mathew
- School of Chemical Sciences, Mahatma Gandhi University Kottayam 686560 India
- Department of Chemistry, Indian Institute of Technology Palakkad Kerala 678577 India
| | - Chithra Mohan
- School of Chemical Sciences, Mahatma Gandhi University Kottayam 686560 India
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6
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Wang Y, Qi M, Lu P, Wang Y. Rh(III)-Catalyzed Reaction of 4-Diazoisochroman-3-imines with (2-Formylaryl)boronic Acids To Access a Straightforward Construction of 5 H-Isochromeno[3,4- c]isoquinolines. J Org Chem 2023; 88:13544-13552. [PMID: 37698421 DOI: 10.1021/acs.joc.3c01185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
An Rh(III)-catalyzed one-pot synthesis of 5H-isochromeno[3,4-c]isoquinolines from readily available 4-diazoisochroman-3-imines and (2-formylphenyl)boronic acids is reported. The cascade annulation involves a Rh(III)-catalyzed cross-coupling and an intramolecular nucleophilic addition-elimination process. A series of biologically important 5H-isochromeno[3,4-c]isoquinolines were obtained in good to excellent yields. The method can be extended to synthesize 7H-isochromeno[3,4-b]thieno[3,2-d]pyridines and 7H-isochromeno[3,4-b]thieno[2,3-d]pyridines from the corresponding heteroaryl boronic acids.
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Affiliation(s)
- Yingxiao Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Minghui Qi
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Ping Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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7
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Lepori M, Schmid S, Barham JP. Photoredox catalysis harvesting multiple photon or electrochemical energies. Beilstein J Org Chem 2023; 19:1055-1145. [PMID: 37533877 PMCID: PMC10390843 DOI: 10.3762/bjoc.19.81] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 07/07/2023] [Indexed: 08/04/2023] Open
Abstract
Photoredox catalysis (PRC) is a cutting-edge frontier for single electron-transfer (SET) reactions, enabling the generation of reactive intermediates for both oxidative and reductive processes via photon activation of a catalyst. Although this represents a significant step towards chemoselective and, more generally, sustainable chemistry, its efficacy is limited by the energy of visible light photons. Nowadays, excellent alternative conditions are available to overcome these limitations, harvesting two different but correlated concepts: the use of multi-photon processes such as consecutive photoinduced electron transfer (conPET) and the combination of photo- and electrochemistry in synthetic photoelectrochemistry (PEC). Herein, we review the most recent contributions to these fields in both oxidative and reductive activations of organic functional groups. New opportunities for organic chemists are captured, such as selective reactions employing super-oxidants and super-reductants to engage unactivated chemical feedstocks, and scalability up to gram scales in continuous flow. This review provides comparisons between the two techniques (multi-photon photoredox catalysis and PEC) to help the reader to fully understand their similarities, differences and potential applications and to therefore choose which method is the most appropriate for a given reaction, scale and purpose of a project.
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Affiliation(s)
- Mattia Lepori
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitatsstraße 31, 93040 Regensburg, Germany
| | - Simon Schmid
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitatsstraße 31, 93040 Regensburg, Germany
| | - Joshua P Barham
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitatsstraße 31, 93040 Regensburg, Germany
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8
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Meher P, Samanta RK, Manna S, Murarka S. Visible light photoredox-catalyzed arylative cyclization to access benzimidazo[2,1- a]isoquinolin-6(5 H)-ones. Chem Commun (Camb) 2023; 59:6092-6095. [PMID: 37128950 DOI: 10.1039/d3cc00605k] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A photoredox-catalyzed arylative radical cascade involving N-acryloyl-2-arylbenzoimidazoles and diaryliodonium triflates leading to the formation of a broad array of pharmaceutically important arylated-benzimidazo[2,1-a]isoquinolin-6(5H)-ones is described. Importantly, the synthesized benzimidazoisoquinolinones are amenable for further synthetic manipulation and allowed efficient access to benzimidazo-fused polycyclic heterocycles.
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Affiliation(s)
- Prahallad Meher
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar-342037, Rajasthan, India.
| | - Raj Kumar Samanta
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar-342037, Rajasthan, India.
| | - Sourav Manna
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar-342037, Rajasthan, India.
| | - Sandip Murarka
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar-342037, Rajasthan, India.
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9
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Sui K, Leng Y, Wu Y. Synthesis of Difluoroarymethyl-Substituted Benzimidazo[2,1- a]isoquinolin-6(5 H)-ones under Mild Conditions. ACS OMEGA 2023; 8:7517-7528. [PMID: 36872989 PMCID: PMC9979369 DOI: 10.1021/acsomega.2c06689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
A highly efficient method for synthesis of difluoroarymethyl-substituted benzimidazo[2,1-a]isoquinolin-6(5H)-ones using 2-arylbenzoimidazoles with α,α-difluorophenylacetic acid as reaction substrates has been developed through radical cascade cyclization. The advantage of this strategy lies in excellent functional group tolerance to generate the corresponding products in good yields under base- and metal-free conditions.
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10
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Yu WQ, Xiong BQ, Zhong LJ, Liu Y. Visible-light-promoted radical cascade alkylation/cyclization: access to alkylated indolo/benzoimidazo[2,1- a]isoquinolin-6(5 H)-ones. Org Biomol Chem 2022; 20:9659-9671. [PMID: 36416184 DOI: 10.1039/d2ob01732f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A new protocol is herein described for the direct generation of alkylated indolo/benzoimidazo[2,1-a]isoquinolin-6(5H)-one derivatives by using Hantzsch esters as alkylation radical precursors using a photoredox/K2S2O8 system. This oxidative alkylation of active alkenes involves a radical cascade cyclization process and a sequence of Hantzsch ester single electron oxidation, C-C bond cleavage, alkylation, arylation and oxidative deprotonation.
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Affiliation(s)
- Wen-Qin Yu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Bi-Quan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Long-Jin Zhong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
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11
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Tan Z, Jiang Y, Xu K, Zeng C. Electrophotoredox/Cerium-Catalyzed Unactivated Alkanes Activation for the Sustainable Synthesis of Alkylated Benzimidazo-Fused Isoquinolinones. J Catal 2022. [DOI: 10.1016/j.jcat.2022.12.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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12
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Wu Z, Lv G, Zheng L, Tang J, Chen J, Liu J, Li H, Wu Y. Mild construction of N-fused polycyclic compounds via Rh(III)/EosinY co-catalyze C−H activation. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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13
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Nunewar S, Kumar S, Meshram AW, Kanchupalli V. Ru(II)-Catalyzed C–H Functionalization of 2-Arylbenzimidazoles with Iodonium Ylides: A Straightforward Access to Bridgehead Polycyclic N-Heterocycles. J Org Chem 2022; 87:13757-13762. [DOI: 10.1021/acs.joc.2c01429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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
| | - Akhilesh Waman Meshram
- 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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14
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Huang YT, Barve IJ, Huang YT, Dhole S, Chiu WJ, Sun CM. Substrate-controlled Rh(III)-catalyzed regiodivergent annulation towards fused and spiro benzimidazoles. Org Biomol Chem 2022; 20:6854-6862. [PMID: 35971982 DOI: 10.1039/d2ob00906d] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Rh(III)-catalyzed cascade C-H activation and cyclization of 2-aryl benzimidazoles with maleimides for the synthesis of benzimidazole-fused isoquinolines and benzimidazole-spiro isoindoles is reported. Switchable selectivity towards the formation of these two distinct products can be achieved using unsubstituted and substituted benzimidazoles at the ortho-position of the phenyl ring. Mechanistically, C-H activation followed by migratory insertion of maleimide forms a Heck-type intermediate. Unsubstituted benzimidazole undergoes aza-Michael addition to form a (4 + 2) fused product, whereas ortho-substituted phenyl benzimidazole causes steric clash to deliver a (4 + 1) spiro-adduct favorably via acid-catalyzed intramolecular annulation.
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Affiliation(s)
- Ying-Ti Huang
- Department of Applied Chemistry, 1001 Ta-Hseuh Road, National Chiao Tung University, Hsinchu 300-10, Taiwan, Republic of China.
| | - Indrajeet J Barve
- Department of Applied Chemistry, 1001 Ta-Hseuh Road, National Chiao Tung University, Hsinchu 300-10, Taiwan, Republic of China.
| | - Yi-Ting Huang
- Department of Applied Chemistry, 1001 Ta-Hseuh Road, National Chiao Tung University, Hsinchu 300-10, Taiwan, Republic of China.
| | - Sandip Dhole
- Amar Chemistry Pvt. Ltd., G1A, Ackruti Corporate Park, Mumbai 400078, India
| | - Wei-Jung Chiu
- Department of Applied Chemistry, 1001 Ta-Hseuh Road, National Chiao Tung University, Hsinchu 300-10, Taiwan, Republic of China.
| | - Chung-Ming Sun
- Department of Applied Chemistry, 1001 Ta-Hseuh Road, National Chiao Tung University, Hsinchu 300-10, Taiwan, Republic of China. .,Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan 1st Road, Kaohsiung 807-08, Taiwan, Republic of China
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15
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Li Z, Cao Y, Chen L, Rong D, Huang G, Xie Y. Copper-catalyzed radical cascade cyclization: Synthesis of benzylated benzimidazo [2,1-a]isoquinoline-6(5H)-ones. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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pan Y, Xu J, Zhang H, Hao R, Shen Z, Huang W. The Synthesis of 5,6‐dihydrobenzo[4,5]imidazo[2,1‐a]isoquinoline Derivatives via Metal‐free Radical Cascade Pathway. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Tang L, Ouyang Y, Sun K, Yu B. Visible-light-promoted decarboxylative radical cascade cyclization to acylated benzimidazo/indolo[2,1- a]isoquinolin-6(5 H)-ones in water. RSC Adv 2022; 12:19736-19740. [PMID: 35865204 PMCID: PMC9260743 DOI: 10.1039/d2ra03467k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 06/30/2022] [Indexed: 12/25/2022] Open
Abstract
A metal-free visible-light-induced decarboxylative radical addition/cyclization procedure at room temperature was described for the synthesis of acylated benzimidazo/indolo[2,1-a]isoquinolines. The procedure was prepared in water via a reaction of functionalized 2-arylbenzoimidazoles or 2,3-diarylindoles and α-oxocarboxylic acids in the presence of phenyliodine(iii) diacetate (PIDA) in one step under mild reaction conditions. In this procedure, traditional heating and metal reagents could be effectively avoided to access 1,4-dicarbonyl-containing benzimidazo/indolo[2,1-a]isoquinoline-6(5H)-ones in satisfactory yields.
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Affiliation(s)
- Lili Tang
- Hunan Engineering Research Center for Recycled Aluminum, College of Chemistry & Materials Engineering, Huaihua University Huaihua 418008 China
| | - Yuejun Ouyang
- Hunan Engineering Research Center for Recycled Aluminum, College of Chemistry & Materials Engineering, Huaihua University Huaihua 418008 China
| | - Kai Sun
- Hunan Engineering Research Center for Recycled Aluminum, College of Chemistry & Materials Engineering, Huaihua University Huaihua 418008 China .,College of Chemistry, Zhengzhou University Zhengzhou 450001 China
| | - Bing Yu
- College of Chemistry, Zhengzhou University Zhengzhou 450001 China
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18
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Chen Z, Huang X, Sun J, Liu Y, Li Z. Metal‐free Cascade Radical Cyclization of
N
‐Methylacrylyl‐2‐phenylbenzimidazole: Construction of Aryldifluoromethylated Benzimidazole[2,1‐
a
]
iso
‐Quinoline‐6(5
H
)‐ketone. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhiwei Chen
- College of Pharmaceutical Sciences Zhejiang University of Technology. Chao Wang Road 18th 310014 Hangzhou P. R. China
| | - Xiaoxiao Huang
- College of Pharmaceutical Sciences Zhejiang University of Technology. Chao Wang Road 18th 310014 Hangzhou P. R. China
| | - Jie Sun
- College of Pharmaceutical Sciences Zhejiang University of Technology. Chao Wang Road 18th 310014 Hangzhou P. R. China
| | - Yanmin Liu
- College of Pharmaceutical Sciences Zhejiang University of Technology. Chao Wang Road 18th 310014 Hangzhou P. R. China
| | - Ziwei Li
- College of Pharmaceutical Sciences Zhejiang University of Technology. Chao Wang Road 18th 310014 Hangzhou P. R. China
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19
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Alizadeh A, Bagherinejad A, Kayanian J. 1,3‐Dimethylbarbituric Acid Promoted Metal‐Free Cascade Annulation for Straightforward Access to Benzimidazole‐Fused Heterocycles. ChemistrySelect 2022. [DOI: 10.1002/slct.202200762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Abdolali Alizadeh
- Department of Chemistry Tarbiat Modares University, P.O. Box 14115-175 Tehran Iran
| | - Akram Bagherinejad
- Department of Chemistry Tarbiat Modares University, P.O. Box 14115-175 Tehran Iran
| | - Jasmine Kayanian
- Department of Chemistry Tarbiat Modares University, P.O. Box 14115-175 Tehran Iran
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20
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Zhong Z, Liang M, Zhang Z, Cui H, Wang N, Mai S, Tao H. Rh(III)-Catalyzed C-H Annulation of Alkenyl- or Arylimidazoles and (Hetero)cyclic 1,3-Dicarbonyl Compounds: A Rapid Access to Imidazo-Fused Polycyclic Compounds. Org Lett 2022; 24:4850-4854. [PMID: 35671457 DOI: 10.1021/acs.orglett.2c01315] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A novel strategy for the synthesis of imidazo-fused polycyclic compounds under mild, base-free, and silver-free conditions by a rhodium(III)-catalyzed C-H annulation of alkenyl or arylimidazoles and (hetero)cyclic 1,3-dicarbonyl compounds is reported here. Such a step-economic protocol features the selective cleavage of two different C-H bonds in one step, featuring easy operation, readily available starting materials, gram-scale synthesis, broad functional group tolerance, and no requirement to presynthesize carbene precursors. Notably, the synthetic potential is showcased by the structural modification of drug and the highly step-economic synthesis of Janus kinase inhibitor in only three steps with a satisfactory 26% total yield (previous method: in nine steps with 0.6% yield).
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Affiliation(s)
- Zhiqing Zhong
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Mingdian Liang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Zhenwei Zhang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Haili Cui
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Ningyue Wang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Shaoyu Mai
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China.,Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Guangzhou 510515, China
| | - Huaming Tao
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China.,Guangdong Provincial Key Laboratory of Chinese Medicine Pharmaceutics, Guangzhou 510515, China
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21
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Guo Y, Huang PF, Liu Y, He BH. Visible-light-induced acylation/cyclization of active alkenes: facile access to acylated isoquinolinones. Org Biomol Chem 2022; 20:3767-3778. [PMID: 35438126 DOI: 10.1039/d2ob00528j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitrogen heterocycles, especially polycyclic compounds, are significant skeletons in valuable molecules. Herein, we developed an efficient and practical visible-light-induced acylation/cyclization of active alkenes with acyl oxime derivatives for constructing acylated indolo/benzimidazo-[2,1,a]isoquinolin-6(5H) ones. This reaction was compatible with various functional groups and a series of fused indole/imidazole skeletons were prepared in up to 95% yield at room temperature.
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Affiliation(s)
- Yang Guo
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Peng-Fei Huang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Bin-Hong He
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
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22
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Recent Advances in the Synthesis of Isoquinoline-Fused Benzimidazoles. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27072062. [PMID: 35408460 PMCID: PMC9000694 DOI: 10.3390/molecules27072062] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/12/2022] [Accepted: 03/16/2022] [Indexed: 11/30/2022]
Abstract
This review includes recent developments in the synthesis of benzo[4,5]imidazo[2,1-a]isoquinolines with particular attention given to categorizing protocols based on the structural features of the ring architecture and crystallographically characterized reaction products.
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23
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Kang QQ, Zhang WK, Ge GP, Zheng H, Wei WT. The construction of benzimidazo[2,1- a]isoquinolin-6(5 H)-ones from N-methacryloyl-2-phenylbenzoimidazoles through radical strategies. Org Biomol Chem 2021; 19:8874-8885. [PMID: 34610071 DOI: 10.1039/d1ob01465j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Benzimidazo[2,1-a]isoquinolin-6(5H)-one constitutes a structurally unique class of tetracyclic N-heterocycles that are found throughout a myriad of biologically active natural products, pharmaceutical compounds, and functional materials. Various synthetic routes for the preparation of benzimidazo[2,1-a]isoquinolin-6(5H)-ones have been reported. In particular, the use of N-methacryloyl-2-phenylbenzoimidazoles to construct benzimidazo[2,1-a]isoquinolin-6(5H)-ones through various radical strategies have attracted widespread attention due to the versatility and simple preparation of raw materials, as well as the step-economy and mild reaction conditions. Using representative examples, we highlight significant progress in the synthesis of benzimidazo[2,1-a]isoquinolin-6(5H)-ones, including the selection of the catalytic system, substrate scope, mechanistic understanding, and applications. The contents of this review focus on the development of C-, S-, P-, and Si-centered radical addition-intramolecular cyclization strategies.
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Affiliation(s)
- Qing-Qing Kang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Wei-Kang Zhang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Guo-Ping Ge
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Hongxing Zheng
- Institution of Functional Organic Molecules and Materials, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China
| | - Wen-Ting Wei
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
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24
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Lin C, Huang W, Huang Y, Dhole S, Sun C. Rhodium‐Catalyzed [4+2] Annulation of N‐Aryl Pyrazolones with Diazo Compounds To Access Pyrazolone‐Fused Cinnolines. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Chih‐Yu Lin
- Department of Applied Chemistry National Chiao-Tung University 1001 Ta-Hseuh Road Hsinchu 300-10, ROC Taiwan
| | - Wan‐Wen Huang
- Department of Applied Chemistry National Chiao-Tung University 1001 Ta-Hseuh Road Hsinchu 300-10, ROC Taiwan
| | - Ying‐Ti Huang
- Department of Applied Chemistry National Chiao-Tung University 1001 Ta-Hseuh Road Hsinchu 300-10, ROC Taiwan
| | - Sandip Dhole
- Amar Chemistry Pvt. Ltd. G1 A, Ackruti Corporate Park Mumbai 400078 India
| | - Chung‐Ming Sun
- Department of Applied Chemistry National Chiao-Tung University 1001 Ta-Hseuh Road Hsinchu 300-10, ROC Taiwan
- Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung 807-08, ROC Taiwan
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25
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Wang C, Sun G, Huang HL, Liu J, Tang H, Li Y, Hu H, He S, Gao F. Visible-Light-Driven Sulfonylation/Cyclization to Access Sulfonylated Benzo[4,5]imidazo[2,1-a]isoquinolin-6(5H)-ones. Chem Asian J 2021; 16:2618-2621. [PMID: 34342941 DOI: 10.1002/asia.202100681] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/18/2021] [Indexed: 12/17/2022]
Abstract
Visible-light-driven sulfonylation/cyclization of N-methacryloyl-2-phenylbenzoimidazoles has been successfully developed. Using commercially available sulfonyl chloride as sulfonylation reagent, a wide range of sulfonylated benzo[4,5]imidazo[2,1-a]isoquinolin-6(5H)-ones with potential antitumor activity were provided in acceptable to excellent yields. This method has the advantages of mild reaction conditions and outstanding functional group tolerance, and provides a new strategy for the development of potential antitumor lead compounds.
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Affiliation(s)
- Chen Wang
- Institute of Translation Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Guoquan Sun
- Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200092, P. R. China
| | - Hong-Li Huang
- College of Chemistry and Chemical Engineering, Liaocheng University, Shandong, 252059, P. R. China
| | - Jing Liu
- Institute of Translation Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Hua Tang
- Institute of Translation Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Yinghua Li
- Institute of Translation Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Honggang Hu
- Institute of Translation Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Shipeng He
- Institute of Translation Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Fei Gao
- Institute of Translation Medicine, Shanghai University, Shanghai, 200444, P. R. China
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26
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Zhao B, Hammond GB, Xu B. Aromatic Ketone-Catalyzed Photochemical Synthesis of Imidazo-isoquinolinone Derivatives. J Org Chem 2021; 86:12851-12861. [PMID: 34436893 DOI: 10.1021/acs.joc.1c01486] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We have developed an efficient photocatalytic decarboxylative radical addition/cyclization strategy to synthesize imidazo-isoquinolinone derivatives using inexpensive aromatic ketone photocatalysts. This method not only tolerates a wide range of functional groups but also works well for both alkyl and aryl radicals.
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Affiliation(s)
- Bin Zhao
- Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Gerald B Hammond
- Department of Chemistry, University of Louisville, Louisville, Kentucky 40292, United States
| | - Bo Xu
- Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
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27
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Ramesh V, Gangadhar M, Nanubolu JB, Adiyala PR. Visible-Light-Induced Deaminative Alkylation/Cyclization of Alkyl Amines with N-Methacryloyl-2-phenylbenzoimidazoles in Continuous-Flow Organo-Photocatalysis. J Org Chem 2021; 86:12908-12921. [PMID: 34477379 DOI: 10.1021/acs.joc.1c01555] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Herein, we present a metal-free visible-light-induced eosin-y-catalyzed deaminative strategy for the sequential alkylation/cyclization of N-methacryloyl-2-phenylbenzoimidazoles with alkyl amine-derived Katritzky salts, which provides an efficient avenue for the construction of various benzo[4,5]imidazo[2,1-a]isoquinolin-6(5H)-one derivatives in moderate to excellent yields under mild reaction conditions. The key enabling feature of this novel reaction includes utilization of redox-active pyridinium salts from abundant and inexpensive primary amine feedstocks that were converted into alkyl radicals via C-N bond scission and subsequent alkylation/cyclization with N-methacryloyl-2-phenylbenzoimidazoles by the formation of two new C-C bonds. In addition, we implemented this protocol for a variety of amino acids, affording the products in moderate yields. Moreover, the novel, environmentally benign batch protocol was further carried out in a continuous-flow regime by utilizing a perfluoroalkoxy alkane tubing microreactor under optimized reaction conditions with a blue light-emitting diode light source, enabling excellent yields and a shorter reaction time (19 min) versus the long reaction time (16 h) of the batch reaction. The reaction displays excellent functional group tolerance, easy operation, scalability, mild reaction conditions, and broad synthetic utility.
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Affiliation(s)
- Vankudoth Ramesh
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Maram Gangadhar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Jagadeesh Babu Nanubolu
- Centre for NMR and Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Praveen Reddy Adiyala
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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28
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Lin S, Chen Y, Luo X, Li Y. Sustainable Cascades to Difluoroalkylated Polycyclic Imidazoles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100868] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sheng‐Nan Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education and Yunnan Province School of Chemical Science and Technology Yunnan University Kunming 650091 China
| | - Yu Chen
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University) College of Chemistry Fuzhou University Fuzhou 350108 China
| | - Xiao‐Dong Luo
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education and Yunnan Province School of Chemical Science and Technology Yunnan University Kunming 650091 China
| | - Yi Li
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University) College of Chemistry Fuzhou University Fuzhou 350108 China
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29
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Aslam M, Mohandoss S, Lee YR. Chemoselective Installation of Diverse Succinimides on Fused Benzimidazoles via Rhodium-Catalyzed C-H Activation/Annulation: Chemosensor for Heavy Metals. Org Lett 2021; 23:6206-6211. [PMID: 34342469 DOI: 10.1021/acs.orglett.1c01793] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A novel Rh-catalyzed cascade C-H activation/annulation of 2-arylbenzimidazoles with maleimides is reported. Rapid chemoselective access to two structurally distinct succinimide-bearing benzoimidazoisoquinolinones is achieved, depending on the acidic and basic conditions. This atom- and step-economic strategy features a wide substrate scope, excellent functional group tolerance, and site-specific functionalization. Application of the methodology yields a novel benzimidazole-based probe as a fluorescent chemosensor for the nanomolar detection of Hg2+, Cu2+, and Fe3+ ions.
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Affiliation(s)
- Mohammad Aslam
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Sonaimuthu Mohandoss
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
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30
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Liu Q, Wang L, Liu J, Ruan S, Li P. Facile synthesis of carbamoylated benzimidazo[2,1- a]isoquinolin-6(5 H)-ones via radical cascade cyclization under metal-free conditions. Org Biomol Chem 2021; 19:3489-3496. [PMID: 33899870 DOI: 10.1039/d1ob00101a] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A highly efficient synthesis of carbamoylated benzimidazo[2,1-a]isoquinolin-6(5H)-ones using 2-arylbenzoimidazoles and oxamic acids was developed. This strategy tolerated various substrates as the starting materials to generate the corresponding products in good yields under metal-free conditions.
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Affiliation(s)
- Qi Liu
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Lei Wang
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China. and Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang 318000, P. R. China. and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Jie Liu
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Shuchen Ruan
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Pinhua Li
- Department of Chemistry, Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China. and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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31
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Wang X, He Z, Xu X, Zhao H, Pan Y, Li H, Xu L. Rh(III)‐catalyzed C6‐selective Acylmethylation and Carboxymethylation of 2‐Pyridones with Diazo Compounds. ChemCatChem 2021. [DOI: 10.1002/cctc.202002016] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xinyu Wang
- Department of Chemistry Renmin University of China Beijing 100872 P.R. China
| | - Zhongyu He
- Department of Chemistry Renmin University of China Beijing 100872 P.R. China
| | - Xin Xu
- Department of Chemistry Renmin University of China Beijing 100872 P.R. China
| | - Haoqiang Zhao
- Department of Chemistry Renmin University of China Beijing 100872 P.R. China
| | - Yixiao Pan
- Department of Chemistry Renmin University of China Beijing 100872 P.R. China
| | - Huanrong Li
- Department of Chemistry Renmin University of China Beijing 100872 P.R. China
| | - Lijin Xu
- Department of Chemistry Renmin University of China Beijing 100872 P.R. China
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32
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Pan C, Yuan C, Yu JT. Peroxide-mediated synthesis of benzimidazo[2,1- a]isoquinoline-6(5 H)-ones via cascade methylation/ethylation and intramolecular cyclization. Org Biomol Chem 2021; 19:619-626. [PMID: 33367428 DOI: 10.1039/d0ob02383c] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A metal-free oxidative radical methylation/arylation of 2-arylbenzoimidazoles with DTBP as the oxidant and methyl radical source was developed. The reaction proceeds through a sequential methyl radical addition/cyclization pathway and affords a series of methyl functionalized benzimidazo[2,1-a]isoquinoline-6(5H)-ones in moderate to good yields. Besides, the ethylation/arylation of 2-arylbenzoimidazoles was also achieved with DTAP.
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Affiliation(s)
- Changduo Pan
- School of Chemical and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.
| | - Cheng Yuan
- School of Chemical and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, 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.
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33
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Zheng L, Cai L, Tao K, Xie Z, Lai Y, Guo W. Progress in Photoinduced Radical Reactions using Electron Donor‐Acceptor Complexes. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100009] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lvyin Zheng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Liuhuan Cai
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Kailiang Tao
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Zhen Xie
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Yin‐Long Lai
- College of Chemistry and Civil Engineering Shaoguan University Shaoguan 512005 P. R. China
| | - Wei Guo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
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34
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Synthesis of sulfonylated benzimidazo[2,1-a]isoquinolin-6(5H)-ones via I2O5-induced radical relay addition/cyclization of activated alkenes with sulfonylhydrazides. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152845] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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35
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Wang B, Zou L, Wang L, Sun M, Li P. Visible-light-induced photoredox-catalyzed synthesis of benzimidazo[2,1-a]iso-quinoline-6(5H)-ones. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.08.013] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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36
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Liu L, Yang DY, He YH, Guan Z. Redox-Neutral Photocatalytic Radical Cascade Cyclization for the Synthesis of CH2CN/CF2COOEt/CF3-Containing Benzo[4,5]imidazo[2,1-a]isoquinolin-6(5H)-One Derivatives. J Org Chem 2020; 85:11892-11901. [DOI: 10.1021/acs.joc.0c01688] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Liang Liu
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - De-Yong Yang
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yan-Hong He
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhi Guan
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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37
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Yuan Y, Zheng Y, Xu B, Liao J, Bu F, Wang S, Hu JG, Lei A. Mn-Catalyzed Electrochemical Radical Cascade Cyclization toward the Synthesis of Benzo[4,5]imidazo[2,1-a]isoquinolin-6(5H)-one Derivatives. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01324] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yong Yuan
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
| | - Yongfu Zheng
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Bizhen Xu
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Jiapeng Liao
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Faxiang Bu
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
| | - Shengchun Wang
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
| | - Jian-Guo Hu
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Aiwen Lei
- National Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, P. R. China
- College of Chemistry and Molecular Sciences, Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China
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38
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Sun K, Li G, Li Y, Yu J, Zhao Q, Zhang Z, Zhang G. Oxidative Radical Relay Functionalization for the Synthesis of Benzimidazo[2,1‐
a
]iso‐quinolin‐6(5
H
)‐ones. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000040] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Kai Sun
- College of Chemistry and Chemical EngineeringAnyang Normal University Anyang 455000 People's Republic of China
- School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang 453007 People's Republic of China
| | - Guofeng Li
- School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang 453007 People's Republic of China
| | - Yuyang Li
- College of Chemistry and Chemical EngineeringAnyang Normal University Anyang 455000 People's Republic of China
| | - Jie Yu
- College of Chemistry and Chemical EngineeringAnyang Normal University Anyang 455000 People's Republic of China
| | - Qing Zhao
- College of Chemistry and Chemical EngineeringAnyang Normal University Anyang 455000 People's Republic of China
| | - Zhiguo Zhang
- School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang 453007 People's Republic of China
| | - Guisheng Zhang
- School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang 453007 People's Republic of China
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39
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Jiang SS, Xiao YT, Wu YC, Luo SZ, Song RJ, Li JH. Manganese(iii)-promoted tandem phosphinoylation/cyclization of 2-arylindoles/2-arylbenzimidazoles with disubstituted phosphine oxides. Org Biomol Chem 2020; 18:4843-4847. [PMID: 32608447 DOI: 10.1039/d0ob00877j] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A simple and practical method for the synthesis of phosphoryl-substituted indolo[2,1-a]isoquinolin-6(5H)-ones and benzimidazo[2,1-a]isoquinolin-6(5H)-ones through manganese(iii)-promoted tandem phosphinoylation/cyclization of 2-arylindoles or 2-arylbenzimidazoles with disubstituted phosphine oxides was developed. In this transformation, new C-P bond and C-C bond were constructed simultaneously under silver-free conditions, exhibiting a broad substrate scope. It was noted that not only diarylphosphine oxides but also dialkyl and arylalkyl-phosphine oxides were compatible with the conditions.
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Affiliation(s)
- Shuai-Shuai Jiang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Yu-Ting Xiao
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Yan-Chen Wu
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Shu-Zheng Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Ren-Jie Song
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China and State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.
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40
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Nie B, Wu W, Zhang Y, Jiang H, Zhang J. Recent advances in the synthesis of bridgehead (or ring-junction) nitrogen heterocycles via transition metal-catalyzed C–H bond activation and functionalization. Org Chem Front 2020. [DOI: 10.1039/d0qo00510j] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An update on recent advances in the synthesis of bridgehead nitrogen fused heterocycles via transition metal-catalyzed C–H activation and functionalization is reported.
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Affiliation(s)
- Biao Nie
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
| | - Yingjun Zhang
- State Key Laboratory of Anti-Infective Drug Development (NO. 2015DQ780357)
- Sunshine Lake Pharma Co
- Ltd
- HEC R&D Center
- Dongguan, 523871
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou
- China
| | - Ji Zhang
- State Key Laboratory of Anti-Infective Drug Development (NO. 2015DQ780357)
- Sunshine Lake Pharma Co
- Ltd
- HEC R&D Center
- Dongguan, 523871
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41
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Yuan Y, Guo X, Zhang X, Li B, Huang Q. Access to 5H-benzo[a]carbazol-6-ols and benzo[6,7]cyclohepta[1,2-b]indol-6-ols via rhodium-catalyzed C–H activation/carbenoid insertion/aldol-type cyclization. Org Chem Front 2020. [DOI: 10.1039/d0qo00820f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The rhodium-catalyzed mono-ortho C–H activation/carbenoid insertion/aldol-type cyclization of 3-aldehyde-2-phenyl-1H-indoles with diazo compounds has been developed.
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Affiliation(s)
- Yumeng Yuan
- Fujian Key Laboratory of Polymer Materials
- College of Chemistry & Materials Science
- Fujian Normal University
- Fuzhou
- P.R. China
| | - Xiemin Guo
- Fujian Key Laboratory of Polymer Materials
- College of Chemistry & Materials Science
- Fujian Normal University
- Fuzhou
- P.R. China
| | - Xiaofeng Zhang
- Fujian Key Laboratory of Polymer Materials
- College of Chemistry & Materials Science
- Fujian Normal University
- Fuzhou
- P.R. China
| | - Buhong Li
- MOE Key Laboratory of Optoelectronic Science and Technology for Medicine
- Fujian Key Laboratory for Photonics Technology
- Fujian Normal University
- Fuzhou
- P. R. China
| | - Qiufeng Huang
- Fujian Key Laboratory of Polymer Materials
- College of Chemistry & Materials Science
- Fujian Normal University
- Fuzhou
- P.R. China
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42
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2018. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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43
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Sun K, Si Y, Chen X, Lv Q, Peng Y, Qu L, Yu B. Synthesis of Phosphoryl‐Substituted Benzimidazo[2,1‐
a
]isoquinolin‐6(5
H
)‐ones from 2‐Arylbenzoimidazoles and Diarylphosphine Oxides. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900570] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kai Sun
- College of ChemistryZhengzhou University Zhengzhou 450001 China
| | - Ya‐Feng Si
- College of ChemistryZhengzhou University Zhengzhou 450001 China
| | - Xiao‐Lan Chen
- College of ChemistryZhengzhou University Zhengzhou 450001 China
| | - Qi‐Yan Lv
- College of ChemistryZhengzhou University Zhengzhou 450001 China
- Henan Nonferrous Metals Geological Exploration Institute Zhengzhou 450052 China
| | - Yu‐Yu Peng
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and TransportationChangsha University of Science and Technology Changsha 410114 China
| | - Ling‐Bo Qu
- College of ChemistryZhengzhou University Zhengzhou 450001 China
| | - Bing Yu
- College of ChemistryZhengzhou University Zhengzhou 450001 China
- Henan Nonferrous Metals Geological Exploration Institute Zhengzhou 450052 China
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and TransportationChangsha University of Science and Technology Changsha 410114 China
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44
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Zeng F, Sun K, Chen X, Yuan X, He S, Liu Y, Peng Y, Qu L, Lv Q, Yu B. Metal‐Free Visible‐Light Promoted Radical Cyclization to Access Perfluoroalkyl‐Substituted Benzimidazo[2,1‐
a
]isoquinolin‐6(5
H
)‐ones and Indolo[2,1‐
a
]isoquinolin‐6(5
H
)‐ones. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901016] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Fan‐Lin Zeng
- College of Chemistry, School of Life SciencesZhengzhou University Zhengzhou 450001 People's Republic of China
| | - Kai Sun
- College of Chemistry, School of Life SciencesZhengzhou University Zhengzhou 450001 People's Republic of China
| | - Xiao‐Lan Chen
- College of Chemistry, School of Life SciencesZhengzhou University Zhengzhou 450001 People's Republic of China
| | - Xiao‐Ya Yuan
- College of Chemistry, School of Life SciencesZhengzhou University Zhengzhou 450001 People's Republic of China
| | - Shuai‐Qi He
- College of Chemistry, School of Life SciencesZhengzhou University Zhengzhou 450001 People's Republic of China
| | - Yan Liu
- College of Chemistry, School of Life SciencesZhengzhou University Zhengzhou 450001 People's Republic of China
- College of Biological and Pharmaceutical EngineeringXinyang Agriculture & Forestry University Xinyang 464000 People's Republic of China
| | - Yu‐Yu Peng
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and TransportationChangsha University of Science and Technology Changsha 410114 People's Republic of China
| | - Ling‐Bo Qu
- College of Chemistry, School of Life SciencesZhengzhou University Zhengzhou 450001 People's Republic of China
| | - Qi‐Yan Lv
- College of Chemistry, School of Life SciencesZhengzhou University Zhengzhou 450001 People's Republic of China
| | - Bing Yu
- College of Chemistry, School of Life SciencesZhengzhou University Zhengzhou 450001 People's Republic of China
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45
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Tang Z, Zhou Y, Song Q. Synthesis of Furoxans and Isoxazoles via Divergent [2 + 1 + 1 + 1] Annulations of Sulfoxonium Ylides and tBuONO. Org Lett 2019; 21:5273-5276. [DOI: 10.1021/acs.orglett.9b01876] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Zhonghe Tang
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Yao Zhou
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Material Sciences Engineering at Huaqiao University, 668 Jimei Boulevard, Xiamen, Fujian 361021, China
- Key Laboratory of Molecule Synthesis and Function Discovery, Fujian Province University, College of Chemistry at Fuzhou University, Fuzhou, Fujian 350108, China
- State Key Laboratroy of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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46
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Sun K, Li SJ, Chen XL, Liu Y, Huang XQ, Wei DH, Qu LB, Zhao YF, Yu B. Silver-catalyzed decarboxylative radical cascade cyclization toward benzimidazo[2,1-a]isoquinolin-6(5H)-ones. Chem Commun (Camb) 2019; 55:2861-2864. [PMID: 30761394 DOI: 10.1039/c8cc10243k] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and efficient decarboxylative radical addition/cyclization strategy was developed, by which a wide range of benzimidazo[2,1-a]isoquinoline-6(5H)-ones were prepared in one-pot via reaction of functionalized 2-arylbenzoimidazoles and carboxylic acids in the presence of K2S2O8/AgNO3 under mild reaction conditions.
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Affiliation(s)
- Kai Sun
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.
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47
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Xiong Q, Xu D, Shan C, Liu S, Luo Y, Liu F, Liu S, Lan Y, Bai R. Investigating the Mechanism of Palladium-Catalyzed Radical Oxidative C(sp3
)−H Carbonylation: A DFT Study. Chem Asian J 2019; 14:655-661. [DOI: 10.1002/asia.201801862] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 01/21/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Qin Xiong
- School of Chemistry and Chemical Engineering; Chongqing Key Laboratory of Theoretical and Computational Chemistry; Chongqing University; Chongqing 400030 China
| | - Dongdong Xu
- School of Chemistry and Chemical Engineering; Chongqing Key Laboratory of Theoretical and Computational Chemistry; Chongqing University; Chongqing 400030 China
| | - Chunhui Shan
- School of Chemistry and Chemical Engineering; Chongqing Key Laboratory of Theoretical and Computational Chemistry; Chongqing University; Chongqing 400030 China
| | - Song Liu
- School of Chemistry and Chemical Engineering; Chongqing Key Laboratory of Theoretical and Computational Chemistry; Chongqing University; Chongqing 400030 China
| | - Yixin Luo
- School of Chemistry and Chemical Engineering; Chongqing Key Laboratory of Theoretical and Computational Chemistry; Chongqing University; Chongqing 400030 China
| | - Fenru Liu
- School of Chemistry and Chemical Engineering; Chongqing Key Laboratory of Theoretical and Computational Chemistry; Chongqing University; Chongqing 400030 China
| | - Shihan Liu
- School of Chemistry and Chemical Engineering; Chongqing Key Laboratory of Theoretical and Computational Chemistry; Chongqing University; Chongqing 400030 China
| | - Yu Lan
- School of Chemistry and Chemical Engineering; Chongqing Key Laboratory of Theoretical and Computational Chemistry; Chongqing University; Chongqing 400030 China
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 China
| | - Ruopeng Bai
- School of Chemistry and Chemical Engineering; Chongqing Key Laboratory of Theoretical and Computational Chemistry; Chongqing University; Chongqing 400030 China
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48
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Xu Y, Zhang L, Liu M, Zhang X, Zhang X, Fan X. Synthesis of benzoazepine derivatives via Rh(iii)-catalyzed inert C(sp2)–H functionalization and [4 + 3] annulation. Org Biomol Chem 2019; 17:8706-8710. [DOI: 10.1039/c9ob01830a] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A novel synthesis of benzoazepine derivatives via Rh(iii)-catalyzed inert C(sp2)–H bond functionalization and [4 + 3] annulation is presented.
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Affiliation(s)
- Yuanshuang Xu
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
| | - Linghua Zhang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
| | - Mengyang Liu
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
| | - Xiaopeng Zhang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
| | - Xinying Zhang
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
| | - Xuesen Fan
- Henan Key Laboratory of Organic Functional Molecules and Drug Innovation
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- School of Chemistry and Chemical Engineering
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49
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Boora R, kumar GR, Subba Reddy BV. Metal-free oxidative acylation/cyclization of N-methacryloyl-2-phenylbenzoimidazole with aryl aldehydes: an easy access to benzimidazo[2,1-a]isoquinolin-6(5H)-ones. Org Biomol Chem 2019; 17:9627-9630. [DOI: 10.1039/c9ob01979k] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A metal-free radical cyclization strategy has been developed for the synthesis of fused benzimidazo[2,1-a]isoquinolin-6(5H)-one derivatives using 70% tert-butylhydroperoxide in water (TBHP).
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Affiliation(s)
- Ramesh Boora
- Centre for Semiochemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad–500 007
- India
| | - G. Ravi kumar
- Centre for Semiochemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad–500 007
- India
| | - B. V. Subba Reddy
- Centre for Semiochemicals
- CSIR-Indian Institute of Chemical Technology
- Hyderabad–500 007
- India
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50
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Cai L, Zhu X, Chen J, Lin A, Yao H. Rh(iii)-Catalyzed C–H activation/annulation of salicylaldehydes with sulfoxonium ylides for the synthesis of chromones. Org Chem Front 2019. [DOI: 10.1039/c9qo00830f] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A rhodium(iii)-catalyzed C–H activation/annulation of salicylaldehydes with sulfoxonium ylides has been developed for the formation of structurally diverse 2-substituted chromones.
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Affiliation(s)
- Libo Cai
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Xiaoyi Zhu
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Jiayi Chen
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Aijun Lin
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
| | - Hequan Yao
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry
- School of Pharmacy
- China Pharmaceutical University
- Nanjing
- P. R. China
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