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Dong CL, Liu HC, He YH, Guan Z. Photoinduced Redox Cascade Reaction of Isatins and Aliphatic Carboxylic Acids to Access 6-Hydroxyindoloquinazolinones. Chemistry 2024:e202400655. [PMID: 38959118 DOI: 10.1002/chem.202400655] [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: 02/18/2024] [Revised: 06/25/2024] [Accepted: 07/01/2024] [Indexed: 07/05/2024]
Abstract
A visible-light-induced cascade reaction is described for the one-pot synthesis of 6-hydroxyindoloquinazolinones using isatins (or isatins and isatoic anhydrides) and aliphatic carboxylic acids. The method provides 36 desired products in 33-96 % yield, exhibiting broad substrate scope and good functional group tolerance. This approach utilizes inexpensive and commercially available starting materials, enabling the direct construction of high-value complex structures under mild conditions without the need for photocatalyst, showcasing significant applicability and environmental friendliness.
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Affiliation(s)
- Chun-Lin Dong
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Han-Chi Liu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Yan-Hong He
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
| | - Zhi Guan
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China
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2
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Kumar S, Ali Shah B. Exploring the Divergent Reactivity of Vinyl Radicals Emanating from Alkynes and Thiols via Photoredox Catalysis. Chem Asian J 2023; 18:e202300693. [PMID: 37656003 DOI: 10.1002/asia.202300693] [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: 08/12/2023] [Revised: 08/30/2023] [Accepted: 09/01/2023] [Indexed: 09/02/2023]
Abstract
Organic chemistry has seen a surge in visible-light-driven transformations, which offer unique reaction pathways and access to new synthetic possibilities. We aim to provide a comprehensive understanding of state-of-the-art photo-mediated alkyne functionalization, with a focus on the reactive behavior of vinyl radicals. This review outlines our contributions to the field, including developing new methods for forming carbon-carbon and carbon-heteroatom bonds.
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Affiliation(s)
- Sourav Kumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India
| | - Bhahwal Ali Shah
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, 180001, India
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3
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Zhao X, Yu X, Liu M, Huo Y, Ji S, Li X, Chen Q. Direct Benzylic C-H Functionalization with Fluorenones under Visible-Light Irradiation. J Org Chem 2023; 88:2612-2620. [PMID: 36725672 DOI: 10.1021/acs.joc.2c02766] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
An external photocatalyst-free benzylic C-H functionalization with fluorenones under visible-light irradiation has been achieved. This transformation provides an efficient synthetic approach to 9-benzylated fluorenols in ≤91% yield with 100% atom economy under mild conditions. Spectroscopic studies suggest that a reductive quenching of photoexcited fluorenones with toluene derivatives generates ketyl radicals and benzyl radicals, which undergo a cross-coupling to afford the desired fluorenols.
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Affiliation(s)
- Xi Zhao
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Xiaofeng Yu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Mingjun Liu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Shaomin Ji
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Xianwei Li
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Qian Chen
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
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4
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Huang LQ, Dong CL, He YH, Guan Z. Visible Light‐Induced Radical‐Radical Coupling: One‐Pot Synthesis of 6‐benzyl‐6‐hydroxyindolo[2,1‐b]quinazolin‐12(6H)‐ones from Isatins and Potassium Benzyl Trifluoroborates. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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5
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Xu W, Zhang Y, Wu Y, Wang J, Lu X, Zhou Y, Zhang FL. Direct Assembly of Diverse Unsymmetrical Tertiary 9-Fluorenols via Transient Directing Group-Enabled Palladium-Catalyzed Dual C-H Bond Activation of α-Ketoesters. J Org Chem 2022; 87:10807-10814. [PMID: 35921192 DOI: 10.1021/acs.joc.2c01080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An expeditious construction of an unsymmetrical tertiary 9-fluorenol skeleton was accomplished starting from readily available α-ketoester and aryl iodide. Inexpensive commercially available substituted aniline was utilized as a potent monodentate transient directing group (TDG) to assist palladium-catalyzed direct ortho-C-H arylation and tandem dual C-H activation of α-ketoesters to form two carbon-carbon bonds. To demonstrate practical applications, the reaction was enlarged to the gram scale, and subsequent one-step derivatization allowed facile access to structurally diversified useful derivatives. A series of control experiments were carried out to shed light on the possible catalytic mechanism.
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Affiliation(s)
- Wengang Xu
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan430070, China
| | - Yangyang Zhang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan430070, China
| | - Yongdi Wu
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan430070, China
| | - Jian Wang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan430070, China
| | - Xuelian Lu
- Shenzhen Research Institute, Wuhan University of Technology, Shenzhen518057, Guangdong, China
| | - Yirong Zhou
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan430030, China
| | - Fang-Lin Zhang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan430070, China.,Shenzhen Research Institute, Wuhan University of Technology, Shenzhen518057, Guangdong, China
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Sustainable radical approaches for cross electrophile coupling to synthesize trifluoromethyl- and allyl-substituted tert-alcohols. iScience 2021; 24:103388. [PMID: 34841228 PMCID: PMC8605352 DOI: 10.1016/j.isci.2021.103388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 09/14/2021] [Accepted: 10/27/2021] [Indexed: 10/27/2022] Open
Abstract
Trifluoromethylated molecules have gained privileged recognition among the medicinal and pharmaceutical chemists. Sustainable photoredox- and electrochemical processes were employed to facilitate the relatively less explored radical cross-electrophile coupling to access trifluoromethyl- and allyl-substituted tert-alcohols. Reactions proceed through trifluoromethyl ketyl radical and allyl radical intermediates, which undergo challenging radical-radical cross-coupling. The developed transformations are mild and chemo-selective to give cross-coupled products and deliver a wide range of valuable trifluoromethyl- and allyl-containing tertiary alcohols. Both processes can also be applied for the synthesis of amine variant containing trifluoromethyl and allyl moiety, which is considered as amide bioisostere.
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Shaikh MA, Agalave SG, Ubale AS, Gnanaprakasam B. Ligand-Free Ru-Catalyzed Direct sp 3 C-H Alkylation of Fluorene Using Alcohols. J Org Chem 2020; 85:2277-2290. [PMID: 31905282 DOI: 10.1021/acs.joc.9b02913] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The sp3 C-H alkylation of 9H-fluorene using alcohol and a Ru catalyst via the borrowing hydrogen concept has been described. This reaction was catalyzed by the [Ru(p-cymene)Cl2]2 complex (3 mol %) and exhibited a broad reaction scope with different alcohols, allowing primary and secondary alcohols to be employed as nonhazardous and greener alkylating agents with the formation of environmentally benign water as a byproduct. A variety of 9H-fluorene underwent selective and exclusive mono-C9-alkylation with primary alcohols in good to excellent isolated yield (26 examples, 50-92% yield), whereas this reaction with secondary alcohols in the absence of any external oxidants furnished the tetrasubstituted alkene as the major product. Furthermore, a base-mediated C-H hydroxylation of the synthesized 9H-fluorene derivatives afforded 9H-hydroxy-functionalized quaternary fluorene derivatives in excellent yield.
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Affiliation(s)
- Moseen A Shaikh
- Department of Chemistry , Indian Institute of Science Education and Research , Pune 411008 , India
| | - Sandip G Agalave
- Department of Chemistry , Indian Institute of Science Education and Research , Pune 411008 , India
| | - Akash S Ubale
- Department of Chemistry , Indian Institute of Science Education and Research , Pune 411008 , India
| | - Boopathy Gnanaprakasam
- Department of Chemistry , Indian Institute of Science Education and Research , Pune 411008 , India
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8
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Affiliation(s)
- Chenxi Yang
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province P. R. China
| | - Xia Sheng
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province P. R. China
| | - Ling Zhang
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province P. R. China
| | - Jiang Yu
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province P. R. China
| | - Dayun Huang
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province P. R. China
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9
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Xia Q, Dong J, Song H, Wang Q. Visible‐Light Photocatalysis of the Ketyl Radical Coupling Reaction. Chemistry 2018; 25:2949-2961. [DOI: 10.1002/chem.201804873] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Qing Xia
- State Key Laboratory of Elemento-Organic ChemistryResearch Institute of, Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Jianyang Dong
- State Key Laboratory of Elemento-Organic ChemistryResearch Institute of, Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic ChemistryResearch Institute of, Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic ChemistryResearch Institute of, Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300071 P. R. China
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Sultan S, Shah BA. Carbon‐Carbon and Carbon‐Heteroatom Bond Formation Reactions Using Unsaturated Carbon Compounds. CHEM REC 2018; 19:644-660. [DOI: 10.1002/tcr.201800095] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/12/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Shaista Sultan
- Natural Product Chemistry Division and AcSIRCSIR-Indian Institute of Integrative Medicine Jammu- 180001
| | - Bhahwal Ali Shah
- Natural Product Chemistry Division and AcSIRCSIR-Indian Institute of Integrative Medicine Jammu- 180001
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11
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Liu Y, Liu X, Li J, Zhao X, Qiao B, Jiang Z. Catalytic enantioselective radical coupling of activated ketones with N-aryl glycines. Chem Sci 2018; 9:8094-8098. [PMID: 30542558 PMCID: PMC6238713 DOI: 10.1039/c8sc02948b] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 08/27/2018] [Indexed: 12/14/2022] Open
Abstract
Asymmetric H-bonding catalysis as a viable strategy for enantioselective radical coupling of ketones is demonstrated. With a visible-light-mediated dual catalytic system involving a dicyanopyrazine-derived chromophore (DPZ) photosensitizer and a chiral phosphoric acid (CPA), N-aryl glycines with a variety of 1,2-diketones and isatins underwent a redox-neutral radical coupling process and furnished two series of valuable chiral 1,2-amino tertiary alcohols in high yields with good to excellent enantioselectivities (up to 97% ee). In this catalysis platform, the formation of neutral radical intermediates between ketyl and H-bonding catalyst CPA is responsible for presenting stereocontrolling factors. Its success in this work should provide inspiration for expansion to other readily accessible ketones to react with various radical species, thus leading to a productive approach to access chiral tertiary alcohol derivatives.
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Affiliation(s)
- Yang Liu
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province , Henan University , Kaifeng , Henan 475004 , P. R. China .
| | - Xiangyuan Liu
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province , Henan University , Kaifeng , Henan 475004 , P. R. China .
| | - Jiangtao Li
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province , Henan University , Kaifeng , Henan 475004 , P. R. China .
| | - Xiaowei Zhao
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province , Henan University , Kaifeng , Henan 475004 , P. R. China .
| | - Baokun Qiao
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province , Henan University , Kaifeng , Henan 475004 , P. R. China .
| | - Zhiyong Jiang
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province , Henan University , Kaifeng , Henan 475004 , P. R. China . .,Henan Key Laboratory of Organic Functional Molecule and Drug Innovation , School of Chemistry and Chemical Engineering , Henan Normal University , Xinxiang , Henan 453007 , P. R. China
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12
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Sultan S, Rizvi MA, Kumar J, Shah BA. Acyl Radicals from Terminal Alkynes: Photoredox-Catalyzed Acylation of Heteroarenes. Chemistry 2018; 24:10617-10620. [DOI: 10.1002/chem.201801628] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Shaista Sultan
- Natural Product Microbes and ACSIR; CSIR-Indian Institute of Integrative Medicine; Jammu- 180001 India
| | | | - Jaswant Kumar
- Natural Product Microbes and ACSIR; CSIR-Indian Institute of Integrative Medicine; Jammu- 180001 India
| | - Bhahwal Ali Shah
- Natural Product Microbes and ACSIR; CSIR-Indian Institute of Integrative Medicine; Jammu- 180001 India
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13
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Stereoselective synthesis of 3,4-di-substituted mercaptolactones via photoredox-catalyzed radical addition of thiophenols. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.04.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Sultan S, Gupta V, Shah BA. Photoredox-Catalyzed Isatin Reactions: Access to Dibenzo-1,7-Naphthyridine Carboxylate and Tryptanthrin. CHEMPHOTOCHEM 2017. [DOI: 10.1002/cptc.201700028] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Shaista Sultan
- Natural Product Microbes and ACSIR; CSIR-Indian Institute of Integrative Medicine; Jammu 180001 India
| | - Vivek Gupta
- Department of Physics; University of Jammu; Jammu 180001 India
| | - Bhahwal Ali Shah
- Natural Product Microbes and ACSIR; CSIR-Indian Institute of Integrative Medicine; Jammu 180001 India
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15
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Xie J, Jin H, Hashmi ASK. The recent achievements of redox-neutral radical C–C cross-coupling enabled by visible-light. Chem Soc Rev 2017; 46:5193-5203. [DOI: 10.1039/c7cs00339k] [Citation(s) in RCA: 335] [Impact Index Per Article: 47.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Visible-light-driven redox-neutral radical C–C coupling brings a powerful platform to achieve non-classical C–C connection in the absence of external reductants or oxidants through a photoredox electron shuttling cycle.
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Affiliation(s)
- Jin Xie
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- China
| | - Hongming Jin
- Organisch-Chemisches Institut
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches Institut
- Heidelberg University
- 69120 Heidelberg
- Germany
- Chemistry Department
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Deshidi R, Devari S, Rizvi M, Shah BA. Regio-Selective Phosphation and Phosphonation of 9-Fluorenones. ChemistrySelect 2016. [DOI: 10.1002/slct.201601359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ramesh Deshidi
- Academy of Scientific and Innovative Research (AcSIR), Natural Product Microbes; CSIR-Indian Institute of Integrative Medicine Institution; Canal Road Jammu -Tawi India 180001
| | - Shekaraiah Devari
- Academy of Scientific and Innovative Research (AcSIR), Natural Product Microbes; CSIR-Indian Institute of Integrative Medicine Institution; Canal Road Jammu -Tawi India 180001
| | - Masood Rizvi
- Department of Chemistry; University of Kashmir; Srinagar India
| | - Bhahwal Ali Shah
- Academy of Scientific and Innovative Research (AcSIR), Natural Product Microbes; CSIR-Indian Institute of Integrative Medicine Institution; Canal Road Jammu -Tawi India 180001
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