1
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Fan ZW, Li ZQ, Zhao BY, Wang MY, Zhang HX, Wang YQ. Acid Promoted Tetrafunctionalization of Terminal Alkynes: Geminal Diazidation and Dibromination. Org Lett 2024; 26:3878-3882. [PMID: 38678578 DOI: 10.1021/acs.orglett.4c01040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
The synthesis of complex alkanes by the tetrafunctionalization of alkynes is limited and challenging. Herein, an unprecedented efficient geminal diazidation and dibromination of terminal alkynes is developed, which provides novel access to structurally diverse organic azides. The approach has exclusive chemo- and regioselectivity and features mild reaction conditions, good tolerance of various functional groups, and more crucially, no metal involved in the reaction, thereby benefiting the late-stage decoration of medicinal molecules. A mechanistic study showed that the current geminal diazidation and dibromination proceeds via a radical pathway.
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Affiliation(s)
- Zhi-Wu Fan
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, P.R. China
| | - Zhi-Qi Li
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, P.R. China
| | - Bao-Yin Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, P.R. China
| | - Meng-Yue Wang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, P.R. China
| | - Hong-Xia Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, P.R. China
| | - Yong-Qiang Wang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, P.R. China
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2
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Zhang J, Sun M, Gao K, Wu H, Li J, Wang Z, Yang J. Synthesis of Fluorine-Containing Multisubstituted Oxa-Spiro[4,5]cyclohexadienones via a Fluorinated Alcohol-Catalyzed One-Pot Sequential Cascade Strategy. J Org Chem 2024; 89:2847-2857. [PMID: 38364825 DOI: 10.1021/acs.joc.3c02105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
In recent years, the application of fluorinated alcohols as solvents, cosolvents, or additives has become important in modern organic synthesis. However, their potential as efficient catalysts in organic synthesis has not been well-explored. In this article, we report on the development of a one-pot sequential cascade reaction of p-quinone methides with difluoroenoxysilanes using hexafluoroisopropanol as catalyst. This reaction allows for the preparation of fluorinated multisubstituted oxa-spiro[4,5]cyclohexadienones. By using 50 mol % 1,1,1,3,3,3-Hexafluoroisopropanol (HFIP), the reaction proceeds smoothly to yield 1,6-conjugated products, which are then subjected to oxidative dearomatization/hemiacetalization using PhI(OAc)2. The overall process affords moderate to high yields and excellent diastereoselectivities.
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Affiliation(s)
- Jing Zhang
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang, Zhejiang 318000, P.R. China
| | - Manman Sun
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang, Zhejiang 318000, P.R. China
| | - Kai Gao
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang, Zhejiang 318000, P.R. China
| | - Haijian Wu
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang, Zhejiang 318000, P.R. China
| | - Jinshan Li
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang, Zhejiang 318000, P.R. China
| | - Zhiming Wang
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang, Zhejiang 318000, P.R. China
| | - Jianguo Yang
- Advanced Research Institute and School of Pharmaceutical Science, Taizhou University, Jiaojiang, Zhejiang 318000, P.R. China
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3
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Debnath B, Sarkar T, Karjee P, Purkayastha SK, Guha AK, Punniyamurthy T. Palladium-Catalyzed Annulative Coupling of Spirovinylcyclopropyl Oxindoles with p-Quinone Methides. J Org Chem 2023. [PMID: 37437136 DOI: 10.1021/acs.joc.3c00173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
Pd-catalyzed annulative coupling of spirovinylcyclopropyl oxindoles with p-quinone methides has been accomplished via cascade carbon-carbon bond formation to afford bis-spirooxindole scaffolds. The mild reaction conditions, diastereoselectivity, functional group diversity, post-synthetic transformations, and mechanistic studies using DFT calculations are the important practical features.
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Affiliation(s)
- Bijoy Debnath
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Tanumay Sarkar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Pallab Karjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | | | - Ankur K Guha
- Advanced Computational Chemistry Centre, Cotton University, Guwahati 781001, India
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4
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Gaikwad RA, Savekar AT, Waghmode SB. Metal-Free Approach for Oxa-spirocyclohexadienones through [3 + 2]/[4 + 2] ipso-Cyclization of para-Quinone Methides with Halo Alcohols. J Org Chem 2023. [PMID: 37406306 DOI: 10.1021/acs.joc.3c00784] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
A facile one-pot metal-free, base-mediated formal [3 + 2] and [4 + 2] dearomative ipso-cycloaddition of para-quinone methides (p-QMs) with halo alcohols has been designed for the efficient construction of 2-oxa-spirocyclohexadienones in excellent yield under mild reaction conditions. The commercial availability of the bases, reagents, and convenient reaction procedure makes it an attractive method for ipso-cyclization.
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Affiliation(s)
- Ramesh A Gaikwad
- Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune 411007, India
| | - Amol T Savekar
- Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune 411007, India
| | - Suresh B Waghmode
- Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune 411007, India
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5
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Chutia K, Dutta D, Sarmah M, Gogoi P. Synthesis of π-Extended Benzofulvenes: A Pd-Catalyzed Cascade Annulation Process Comprising C-C Bond Formation Followed by 1,6-Conjugate Addition. J Org Chem 2023. [PMID: 37079662 DOI: 10.1021/acs.joc.3c00035] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
A Pd-catalyzed cascade annulation process comprising C-C bond formation followed by 1,6-conjugate addition for π-extended benzofulvenes is reported. This process is compatible with a wide range of functionalities for both the p-quinone methides and internal alkynes, leading to diverse π-extended benzofulvenes. Additionally, this strategy is also applicable for aryne annulation with p-quinone methides.
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Affiliation(s)
- Kangkana Chutia
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Dhiraj Dutta
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Manashi Sarmah
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India
| | - Pranjal Gogoi
- Applied Organic Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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6
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Xiong B, Si L, Zhu L, Wu R, Liu Y, Xu W, Zhang F, Tang KW, Wong WY. Room-Temperature ZnBr 2 -Catalyzed Regioselective 1,6-Hydroarylation of Electron-Rich Arenes to para-Quinone Methides: Synthesis of Unsymmetrical Triarylmethanes. Chem Asian J 2023; 18:e202201156. [PMID: 36507597 DOI: 10.1002/asia.202201156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/10/2022] [Accepted: 12/12/2022] [Indexed: 12/14/2022]
Abstract
A mild and efficient Zn(II)-catalyzed regioselective 1,6-hydroarylation of para-quinone methides (p-QMs) with electron-rich arenes protocol is reported. A variety of electron-rich arenes and para-quinone methides are well tolerated under mild conditions, delivering a broad range of triarylmethanes in good to excellent yields. The present method also works well for the hydroarylation of p-QMs with other nucleophiles, such as aniline, indole and phenol derivatives, offering the corresponding triarylmethanes with good yields under the standard conditions. The possible mechanism for the formation of C(sp3 )-C(sp2 ) bonds in hydroarylation reactions has been explored by step-by-step control experiments, and the reaction may follow a second-order manner in a chemical kinetic study.
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Affiliation(s)
- Biquan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China.,Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University Hung Hom, Hong Kong, P. R. China
| | - Lulu Si
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China
| | - Longzhi Zhu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China.,Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University Hung Hom, Hong Kong, P. R. China
| | - Rong Wu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China
| | - Weifeng Xu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China
| | - Fan Zhang
- College of Chemistry and Chemical Engineering, Jishou University, 416000, Jishou, P. R. China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, 414006, Yueyang, P. R. China
| | - Wai-Yeung Wong
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University Hung Hom, Hong Kong, P. R. China
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7
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Zhi S, Yao H, Zhang W. Difunctionalization of Dienes, Enynes and Related Compounds via Sequential Radical Addition and Cyclization Reactions. Molecules 2023; 28:molecules28031145. [PMID: 36770814 PMCID: PMC9919800 DOI: 10.3390/molecules28031145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 01/26/2023] Open
Abstract
Radical reactions are powerful in creating carbon-carbon and carbon-heteroatom bonds. Designing one-pot radical reactions with cascade transformations to assemble the cyclic skeletons with two new functional groups is both synthetically and operationally efficient. Summarized in this paper is the recent development of reactions involving radical addition and cyclization of dienes, diynes, enynes, as well as arene-bridged and arene-terminated compounds for the preparation of difunctionalization cyclic compounds. Reactions carried out with radical initiators, transition metal-catalysis, photoredox, and electrochemical conditions are included.
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Affiliation(s)
- Sanjun Zhi
- Jiangsu Key Laboratory for the Chemistry of Low-Dimensional Materials, Huaiyin Normal University, Huai’an 223300, China
| | - Hongjun Yao
- College of Biological Science and Technology, Beijing Forestry University, 35 Qinghua East Road, Beijing 100083, China
| | - Wei Zhang
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston, MA 02125, USA
- Correspondence: ; Tel.: +1-617-287-6147
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8
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Niu SS, Liu Y, Zhang Y, Li XC, Gong J, Ding W, Cheng Y. Experimental and Theoretical Study on the Regioselective Radical Cyclization Reactions of 1-( o-Alkenylaryl)-2-amido-1-ketones for the Construction of Indeno[2,1- d][1,3]oxazin-9-ones. J Org Chem 2022; 87:9576-9592. [PMID: 35820108 DOI: 10.1021/acs.joc.2c00567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple and efficient two-step method for the construction of novel 2,4,9a-trisubstituted-4a,9a-dihydroindeno[2,1-d][1,3]oxazin-9-ones has been developed. The NHC-catalyzed aza-benzoin reaction of o-alkenyl benzaldehydes with N-acylarylimines afforded 1-(o-alkenylaryl)-2-amido-2-aryl-1-ethanones, which underwent regioselective 5-exo-trig radical cyclization to furnish the three-ring-fused heterocyclic products, generally in good yields. The synthetic method displayed good tolerance toward the nature of substituents, substitution pattern, and steric hindrance of o-alkenyl benzaldehydes. Based on this method, the synthesis of unprecedented dihydrobenzo[6,7]indeno[2,1-d][1,3]oxazin-7-ones and dihydropyrido[2',3':3,4]cyclopenta[1,2-d][1,3]oxazin-9-ones has been achieved by employing o-alkenylnaphthaldehyde and o-alkenylnicotinaldehyde as substrates. The regioselectivity between 5-exo-trig and 6-endo-trig radical cyclization reactions of different 1-(o-alkenylaryl)-2-amido-2-aryl-1-ethanones were elucidated with DFT calculations.
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Affiliation(s)
- Shuang-Shuo Niu
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yimin Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yue Zhang
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xing-Chi Li
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Jian Gong
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Wanjian Ding
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Ying Cheng
- College of Chemistry, Beijing Normal University, Beijing 100875, China
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9
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Yang M, Hua J, Wang H, Ma T, Liu C, He W, Zhu N, Hu Y, Fang Z, Guo K. Photomediated Spirocyclization of N-Benzyl Propiolamide with N-Iodosuccinimide for Access to Azaspiro[4.5]deca-6,9-diene-3,8-dione. J Org Chem 2022; 87:8445-8457. [PMID: 35678323 DOI: 10.1021/acs.joc.2c00579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A metal- and oxidant-free route for affording azaspiro[4.5]deca-6,9-diene-3,8-dione via photomediated iodinated spirocyclization of N-(4-methoxybenzyl) propiolamide has been developed. The reaction underwent a radical addition/ipso-cyclization/dearomatization process at room temperature and successfully constructed C-C and C-I bonds. This green and convenient approach could be generally expanded to produce a range of iodinated spirocyclization products in moderate to good yields.
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Affiliation(s)
- Man Yang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jiawei Hua
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Hao Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Tao Ma
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chengkou Liu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Wei He
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Ning Zhu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yujing Hu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Zheng Fang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Kai Guo
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211800, China
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10
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Chen P, Fan JH, Yu WQ, Xiong BQ, Liu Y, Tang KW, Xie J. Alkylation/Ipso-cyclization of Active Alkynes Leading to 3-Alkylated Aza- and Oxa-spiro[4,5]-trienones. J Org Chem 2022; 87:5643-5659. [PMID: 35416658 DOI: 10.1021/acs.joc.1c03118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A method for the preparation of 3-alkylated spiro[4.5]trienones via alkylation/ipso-cyclization of activated alkynes with 4-alkyl-DHPs under transition-metal-free conditions is proposed. This alkylation successively undergoes the generation of alkyl radicals, addition of alkyl radicals to the alkynes, and intramolecular ipso-cyclization. The mechanism studies suggest that the alkylation/ipso-cyclization involves a radical process. This ipso-cyclization procedure shows a series of advantages, such as accessibility, mild conditions, high efficiency, greater safety, and an environmentally friendly method.
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Affiliation(s)
- Pu Chen
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Jian-Hong Fan
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - 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
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Jun Xie
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
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11
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Xiong B, Si L, Liu Y, Xu W, Jiang T, Cao F, Tang KW, Wong WY. Metal-free, Phosphoric Acid-catalyzed Regioselective 1,6-Hydroarylation of para-Quinone Methides with Indoles in Water. Chem Asian J 2022; 17:e202200042. [PMID: 35246930 DOI: 10.1002/asia.202200042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 02/19/2022] [Indexed: 11/08/2022]
Abstract
An efficient, cheap and green protocol for the highly regioselective 1,6-hydroarylation of para -quinone methides ( p -QMs) with indoles at the C-3 position has been established by phosphoric acid catalysis in water under the transition-metal-free reaction conditions. A wide range of indole derivatives and para -quinone methides ( p -QMs) are compatible for the reaction, affording the corresponding 1,6-hydroarylation products with good to excellent yields. The possible mechanism of the reaction has been explored by step-by-step control experiments. The protocol is convenient for practical application, leading a safe, green and feasible way for the formation of C-3 diarylmethyl functionalized indole derivatives.
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Affiliation(s)
- Biquan Xiong
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Lulu Si
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Yu Liu
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Weifeng Xu
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Tao Jiang
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Fan Cao
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Ke-Wen Tang
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Wai-Yeung Wong
- The Hong Kong Polytechnic University, Department of Applied Biology and Chemical Technology, Hung Hom, Hong Kong, HONG KONG
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12
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Shee M, Singh NDP. Chemical versatility of azide radical: journey from a transient species to synthetic accessibility in organic transformations. Chem Soc Rev 2022; 51:2255-2312. [PMID: 35229836 DOI: 10.1039/d1cs00494h] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The generation of azide radical (N3˙) occurs from its precursors primarily via a single electron transfer (SET) process or homolytic cleavage by chemical methods or advanced photoredox/electrochemical methods. This in situ generated transient open-shell species has unique characteristic features that set its reactivity. In the past, the azide radical was widely used for various studies in radiation chemistry as a 1e- oxidant of biologically important molecules, but now it is being exploited for synthetic applications based on its addition and intermolecular hydrogen atom transfer (HAT) abilities. Due to the significant role of nitrogen-containing molecules in synthesis, drug discovery, biological, and material sciences, the direct addition onto unsaturated bonds for the simultaneous construction of C-N bond with other (C-X) bonds are indeed worth highlighting. Moreover, the ability to generate O- or C-centered radicals by N3˙ via electron transfer (ET) and intermolecular HAT processes is also well documented. The purpose of controlling the reactivity of this short-lived intermediate in organic transformations drives us to survey: (i) the history of azide radical and its structural properties (thermodynamic, spectroscopic, etc.), (ii) chemical reactivities and kinetics, (iii) methods to produce N3˙ from various precursors, (iv) several significant azide radical-mediated transformations in the field of functionalization with unsaturated bonds, C-H functionalization via HAT, tandem, and multicomponent reaction with a critical analysis of underlying mechanistic approaches and outcomes, (v) concept of taming the reactivity of azide radicals for potential opportunities, in this review.
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Affiliation(s)
- Maniklal Shee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
| | - N D Pradeep Singh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
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13
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Pan Y, Ren W, Zhang Z, Luo F, Hou X, Li X, Yang YF, Wang Y. Tandem 1,6-addition/cyclopropanation/rearrangement reaction of vinylogous para-quinone methides with 3-chlorooxindoles: construction of vicinal quaternary carbon centers. Org Chem Front 2022. [DOI: 10.1039/d2qo00471b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel tandem 1,6-addition/cyclopropanation/rearrangement reaction of vinylogous para-quinone methides with 3-chlorooxindoles has been developed, providing dispirooxindole–cyclopentane–cyclohexadienones with vicinal quaternary carbon centers.
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Affiliation(s)
- Yuan Pan
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Weiwu Ren
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology (QNLM), Qingdao 266237, China
| | - Zhanhao Zhang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Fengbiao Luo
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Xiaohan Hou
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Xiaoyang Li
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Yun-Fang Yang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China
| | - Yang Wang
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology (QNLM), Qingdao 266237, China
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14
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Mane BB, Waghmode SB. Iron-Catalyzed Ring Opening of Cyclopropanols and Their 1,6-Conjugate Addition to p-Quinone Methides. J Org Chem 2021; 86:17774-17781. [PMID: 34813312 DOI: 10.1021/acs.joc.1c02059] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel iron-catalyzed ring opening of cyclopropanols and their 1,6-conjugate addition to p-quinone methides for accessing substituted phenols is disclosed. In this protocol, various cyclopropanols are converted to alkyl radicals and undergo 1,6-conjugate addition to p-quinone methides toward C-C bond formation. The salient features of this methodology include operationally simple and mild reaction conditions, environmentally benign protocol, high efficiency, inexpensive catalyst, good to excellent yield, and a wide range of substrate scope.
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Affiliation(s)
- Baliram B Mane
- Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune 411007, India
| | - Suresh B Waghmode
- Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune 411007, India
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15
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Zhou Q, Xiong FT, Chen P, Xiong BQ, Tang KW, Liu Y. The visible-light-induced acylation/cyclization of alkynoates with acyl oximes for the construction of 3-acylcoumarins. Org Biomol Chem 2021; 19:9012-9020. [PMID: 34610069 DOI: 10.1039/d1ob01568k] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A nitrogen-centered radical-mediated carbon-carbon bond cleavage strategy is described to synthesize functionalized 3-acylcoumarins. The strategy is enabled by the visible-light-induced acylation/cyclization of alkynoates with various acyl oxime compounds in acetonitrile. The difunctionalization of carbon-carbon triple bonds precedes the generation of iminyl radicals, which is followed by the formation of acyl radicals. The acyl radicals then attack the carbon-carbon triple bonds, followed by 5-exo-trig cyclization and 1,2-ester migration. This strategy has wide substrate adaptability and good substituent tolerance.
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Affiliation(s)
- Quan Zhou
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Fang-Ting Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Pu Chen
- 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.
| | - Ke-Wen Tang
- 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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16
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Yu WQ, Xie J, Chen Z, Xiong BQ, Liu Y, Tang KW. Visible-Light-Induced Transition-Metal-Free Nitrogen-Centered Radical Strategy for the Synthesis of 2-Acylated 9 H-Pyrrolo[1,2- a]indoles. J Org Chem 2021; 86:13720-13733. [PMID: 34523335 DOI: 10.1021/acs.joc.1c01834] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A convenient and efficient visible-light-induced tandem acylation/cyclization of N-propargylindoles with aryl- or alkyl-substituted acyl oxime esters for the synthesis of 2-acyl-substituted 9H-pyrrolo[1,2-a]indoles under transition-metal-free conditions, which proceeds via nitrogen-centered radical-mediated cleavage of the C-C σ-bond in acyl oxime esters, is established. The aryl or alkyl acyl radicals, which come from acyl oxime esters, attack the C-C triple bonds in N-propargylindoles and then go through intramolecular cyclization/isomerization.
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Affiliation(s)
- Wen-Qin Yu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Jun Xie
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Zan Chen
- 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
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
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17
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Chen P, Xie J, Chen Z, Xiong B, Liu Y, Yang C, Tang K. Visible‐Light‐Mediated Nitrogen‐Centered Radical Strategy: Preparation of 3‐Acylated Spiro[4,5]trienones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100852] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Pu Chen
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Jun Xie
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Zan Chen
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Bi‐Quan Xiong
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Chang‐An Yang
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Ke‐Wen Tang
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
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18
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Yu KY, Deng YH, Ge XM, An XT, Shu PF, Cao YX, Zhao XH, Fan CA. Tandem (2 + 2) Annulation/Retro-4π Electrocyclization/Imino-Nazarov Cyclization Reaction of p-Quinone Methides with Ynamides: Expeditious Construction of Functionalized Aminoindenes. Org Lett 2021; 23:5885-5890. [PMID: 34279973 DOI: 10.1021/acs.orglett.1c02003] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A new tandem annulation of p-quinone methides (p-QMs) with ynamides is described. This cascade reaction features a unique combination of (2 + 2) annulation, retro-4π electrocyclization, and imino-Nazarov cyclization, wherein vinyl p-quinone methides (p-VQMs) as one of the key intermediates have been identified chemically. Significantly, an unusual structural reconstruction of p-QMs involving the cleavage of the C5-C6 bond and the late-stage formation of the C4-C6 bond is involved, leading to a methodology development for the construction of functionalized aminoindenes.
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Affiliation(s)
- Ke-Yin Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Yu-Hua Deng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Xiao-Min Ge
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Xian-Tao An
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Peng-Fei Shu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Ye-Xing Cao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Xian-He Zhao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Chun-An Fan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
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19
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Wei WT, Li Q, Zhang MZ, He WM. N-Radical enabled cyclization of 1,n-enynes. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(20)63702-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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20
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Kaur N, Singh P, Banerjee P. Vinylogous Aza‐Michael Addition of Urea Derivatives with
p
‐Quinone Methides Followed by Oxidative Dearomative Cyclization: Approach to Spiroimidazolidinone Derivatives. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100077] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Navpreet Kaur
- Department of Chemistry Indian Institute of Technology Ropar Rupnagar Punjab 140001 India
| | - Priyanka Singh
- Department of Chemistry Indian Institute of Technology Ropar Rupnagar Punjab 140001 India
| | - Prabal Banerjee
- Department of Chemistry Indian Institute of Technology Ropar Rupnagar Punjab 140001 India
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21
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Zhang J, Liu J, Dai L, Ge Y, Xu L, Xia Y, Xu L, Rong L. An efficient construction of
CN
bond under catalyst‐free and room temperature conditions. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jinpeng Zhang
- Key Lab of Environment and Health School of Public Health, Xuzhou Medical University Xuzhou Jiangsu China
| | - Jing Liu
- Key Lab of Environment and Health School of Public Health, Xuzhou Medical University Xuzhou Jiangsu China
| | - Lei Dai
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials School of Chemistry and Materials Science, Jiangsu Normal University Xuzhou Jiangsu China
| | - Yuqian Ge
- Key Lab of Environment and Health School of Public Health, Xuzhou Medical University Xuzhou Jiangsu China
| | - Linlin Xu
- Key Lab of Environment and Health School of Public Health, Xuzhou Medical University Xuzhou Jiangsu China
| | - Yingying Xia
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials School of Chemistry and Materials Science, Jiangsu Normal University Xuzhou Jiangsu China
| | - Lan Xu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials School of Chemistry and Materials Science, Jiangsu Normal University Xuzhou Jiangsu China
| | - Liangce Rong
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials School of Chemistry and Materials Science, Jiangsu Normal University Xuzhou Jiangsu China
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22
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Affiliation(s)
- Paramasivam Sivaguru
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University, Changchun 130024, China
| | - Yongquan Ning
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University, Changchun 130024, China
| | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Northeast Normal University, Changchun 130024, China
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23
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Zuo HD, Ji XS, Guo C, Tu SJ, Hao WJ, Jiang B. Cu-Catalyzed radical-triggered spirotricyclization of enediynes and enyne-nitriles for the synthesis of pentacyclic spiroindenes. Org Chem Front 2021. [DOI: 10.1039/d0qo01640c] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A new copper-catalyzed radical-triggered fluoromethylation-spirotricyclization of enediyne- and enyne-nitrile-containing para-quinone methides (p-QMs) was reported for the first time, and used to produce a series of hitherto unreported pentacyclic spiroindenes.
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Affiliation(s)
- Hang-Dong Zuo
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
- School of Chemistry & Materials Science
| | - Xiao-Shuang Ji
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Cheng Guo
- College of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
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24
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Ren H, Zhang Y, Wang H. Synthesis of aza‐diarylmethines via 1,6‐conjugate addition/aromatization of
para
‐quinone methides and isatin catalyzed by
Et
3
N
. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4139] [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]
Affiliation(s)
- Hong‐Xia Ren
- School of Chemistry and Chemical Engineering Zunyi Normal College Zunyi China
| | - Ying Zhang
- School of Chemistry and Chemical Engineering Zunyi Normal College Zunyi China
| | - Hui‐Ling Wang
- School of Chemistry and Chemical Engineering Zunyi Normal College Zunyi China
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25
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An Z, Liu Y, Sun Y, Yan R. TFA-Catalyzed [3+2] Spiroannulation of Cyclobutanols: A Route to Spiro[cyclobuta[a]indene-7,1'-cyclobutane] Skeletons. Chem Asian J 2020; 15:3812-3815. [PMID: 32997399 DOI: 10.1002/asia.202001048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/27/2020] [Indexed: 12/15/2022]
Abstract
A straightforward method for the synthesis of spiro[cyclobuta[a]indene-7,1'-cyclobutane] derivatives from cyclobutanols has been developed via one-pot [3+2] spiroannulation. A series of new spiro[cyclobuta[a]indene-7,1'-cyclobutane] derivatives are facilely synthesized in good yields under mild reaction conditions.
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Affiliation(s)
- Zhenyu An
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yafeng Liu
- Chemical Science and Engineering College, North Minzu University, Yinchuan, 750000, P. R. China
| | - Yanwei Sun
- Research Institute of Exploration & Development, Tuha Oilfield Company, Xinjiang, 830000, P. R. China
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
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26
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Liu Q, Mei Y, Wang L, Ma Y, Li P. Visible‐Light‐Induced Radical Cascade Cyclizations of 1,7‐Enynes with Sulfinic Acids: Direct Access to Sulfonated Chromanes and Sulfonated Tetrahydroquinolines under Metal‐Free Conditions. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000846] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Qi Liu
- Advanced Research Institute and Department of Chemistry Taizhou University Taizhou Zhejiang 318000 People's Republic of China
- Department of Chemistry Huaibei Normal University Huaibei Anhui 235000 People's Republic of China
| | - Yousheng Mei
- Department of Chemistry Huaibei Normal University Huaibei Anhui 235000 People's Republic of China
| | - Lei Wang
- Advanced Research Institute and Department of Chemistry Taizhou University Taizhou Zhejiang 318000 People's Republic of China
- Department of Chemistry Huaibei Normal University Huaibei Anhui 235000 People's Republic of China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Shanghai 200032 People's Republic of China
| | - Yongmin Ma
- Advanced Research Institute and Department of Chemistry Taizhou University Taizhou Zhejiang 318000 People's Republic of China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Shanghai 200032 People's Republic of China
| | - Pinhua Li
- Department of Chemistry Huaibei Normal University Huaibei Anhui 235000 People's Republic of China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Shanghai 200032 People's Republic of China
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27
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Zuo HD, Cui CC, Guo C, Hao WJ, Tu SJ, Jiang B. Metal-Catalyzed Spiroannulation-Fluoromethylfunctionaliztions of 1,5-Enynes for the Synthesis of Stereodefined (Z)-Spiroindenes. Chem Asian J 2020; 15:4070-4076. [PMID: 33016006 DOI: 10.1002/asia.202000954] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/02/2020] [Indexed: 12/12/2022]
Abstract
Two classes of new catalytic spiroannulation-fluormethylfunctionaliztions of para-quinone methide (p-QM)-containing 1,5-enynes have been established under redox-neutral conditions. Palladium-catalyzed spiroannulation-iododifluoromethylation with ethyl difluoroiodoacetate oriented completely stereoselective access to (Z)-spiroindenes and the latter included copper-catalyzed three-component spiroannulation-cyanotrifluoromethylation starting from Togni's reagent and trimethylsilanecarbonitrile (TMSCN). Both reaction pathways involve fluoroalkyl radical-triggered 1,6-addition/5-exo-dig annulation/metal radical cross-coupling/reductive elimination sequence, providing practical and stereoselective protocols for rapidly constructing cyclohexadienone-containing spiroindenes with generally good yields.
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Affiliation(s)
- Hang-Dong Zuo
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, P. R. China.,School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Chen-Chang Cui
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Cheng Guo
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
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28
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Deng YH, Chu WD, Shang YH, Yu KY, Jia ZL, Fan CA. P(NMe2)3-Mediated Umpolung Spirocyclopropanation Reaction of p-Quinone Methides: Diastereoselective Synthesis of Spirocyclopropane-Cyclohexadienones. Org Lett 2020; 22:8376-8381. [DOI: 10.1021/acs.orglett.0c02998] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yu-Hua Deng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research & Development Center for Natural Products, and School of Chemical Science and Technology, Yunnan University, No. 2 Cuihu North Road, Kunming 650091, China
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Wen-Dao Chu
- College of Chemistry and Chemical Engineering, China West Normal University, No. 1 Shida Road, Nanchong 637002, China
| | - Yun-Han Shang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Research & Development Center for Natural Products, and School of Chemical Science and Technology, Yunnan University, No. 2 Cuihu North Road, Kunming 650091, China
| | - Ke-Yin Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Zhi-Long Jia
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
| | - Chun-An Fan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000, China
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29
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Pawlowski R, Skorka P, Stodulski M. Radical‐Mediated Non‐Dearomative Strategies in Construction of Spiro Compounds. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000807] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- R. Pawlowski
- Institute of Organic Chemistry Polish Academy of Sciences Warsaw Poland
| | - P. Skorka
- Medical University of Warsaw Faculty of Pharmacy Warsaw Poland
| | - M. Stodulski
- Institute of Organic Chemistry Polish Academy of Sciences Warsaw Poland
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30
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Wang M, Tseng P, Chi W, Suresh S, Edukondalu A, Chen Y, Lin W. Diversity‐Oriented Synthesis of Spirocyclohexene Indane‐1,3‐diones and Coumarin‐Fused Cyclopentanes via an Organobase‐Controlled Cascade Reaction. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000597] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Min Wang
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Ping‐Yao Tseng
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Woei‐Jye Chi
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Sundaram Suresh
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Athukuri Edukondalu
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Yi‐Ru Chen
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
| | - Wenwei Lin
- Department of ChemistryNational Taiwan Normal University, 88, Sec. 4 Tingchow Road Taipei 11677 Taiwan
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31
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Affiliation(s)
- Moriah Locklear
- Department of Chemistry; University of Nebraska-Lincoln; 68588-0304 Lincoln NE USA
| | - Patrick H. Dussault
- Department of Chemistry; University of Nebraska-Lincoln; 68588-0304 Lincoln NE USA
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32
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Zuo HD, Hao WJ, Zhu CF, Guo C, Tu SJ, Jiang B. Electrochemical Annulation–Iodosulfonylation of 1,5-Enyne-containing para-Quinone Methides (p-QMs) to Access (E)-Spiroindenes. Org Lett 2020; 22:4471-4477. [DOI: 10.1021/acs.orglett.0c01470] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hang-Dong Zuo
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
- College of Chemistry and Molecular Engineering and Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Chi-Fan Zhu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
- College of Chemistry and Molecular Engineering and Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu P. R. China
| | - Cheng Guo
- College of Chemistry and Molecular Engineering and Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
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33
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Wang J, Zhao L, Zhao L, Pan X, Lv C, Zhi Y, Wang A, Zhao K, Hu L. Diastereoselective Synthesis of Tetrahydroquinolines Bearing Oxindole Scaffolds via Annulation of
in Situ
Generated
p
‐Quinone Methides. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000436] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Junwei Wang
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Lei Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Lin Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Xiang Pan
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Cheng Lv
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Ying Zhi
- Institute of Materia MedicaShandong First Medical University & Shandong Academy of Medical Science Jinan 250062 People's Republic of China
| | - Ai Wang
- Institute of Molecular ScienceShanxi University Taiyuan 030006 People's Republic of China
| | - Kun Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
| | - Lihong Hu
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of PharmacyNanjing University of Chinese Medicine Nanjing 210023 People's Republic of China
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34
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Lima CGS, Pauli FP, Costa DCS, de Souza AS, Forezi LSM, Ferreira VF, de Carvalho da Silva F. para
-Quinone Methides as Acceptors in 1,6-Nucleophilic Conjugate Addition Reactions for the Synthesis of Structurally Diverse Molecules. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901796] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Carolina G. S. Lima
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
| | - Fernanda P. Pauli
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
| | - Dora C. S. Costa
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
| | - Acácio S. de Souza
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
| | - Luana S. M. Forezi
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
| | - Vitor F. Ferreira
- Departamento de Tecnologia Farmacêutica; Universidade Federal Fluminense; 24241-000 Niterói RJ Brazil
| | - Fernando de Carvalho da Silva
- Departamento de Química Orgânica; Instituto de Química; Universidade Federal Fluminense; Campus do Valonguinho 24020-150 Niterói RJ Brazil
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35
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Guin S, Gudimella SK, Samanta S. 1,6-Addition of vinyl p-quinone methides with cyclic sulfamidate imines: access to 4-hydroxyaryl-2,6-diarylpyridines. Org Biomol Chem 2020; 18:1337-1342. [DOI: 10.1039/c9ob02708d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A base-promoted 1,6-addition–cyclization reaction of vinyl para-quinone methides with cyclic sulfamidate imines in an open atmosphere is reported. This method delivers good to high yields of 2,4,6-trisubstituted pyridines with a valuable phenolic moiety at the C4-position.
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Affiliation(s)
- Soumitra Guin
- Indian Institute of Technology Indore
- Discipline of Chemistry
- Indore 453552
- India
| | | | - Sampak Samanta
- Indian Institute of Technology Indore
- Discipline of Chemistry
- Indore 453552
- India
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36
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Wang JY, Hao WJ, Tu SJ, Jiang B. Recent developments in 1,6-addition reactions of para-quinone methides (p-QMs). Org Chem Front 2020. [DOI: 10.1039/d0qo00387e] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this review, we provide a comprehensive overview of recent progress in this rapidly growing field by summarizing the 1,6-conjugate addition and annulation reactions of p-QMs with consideration of their mechanisms and applications.
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Affiliation(s)
- Jia-Yin Wang
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
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37
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Zou L, Wang L, Sun L, Xie X, Li P. Photo-driven haloazidation cyclization of 1,5-enynes having cyano groups with TMSN3 and NIS/NCS/NBS under metal-free conditions. Chem Commun (Camb) 2020; 56:7933-7936. [DOI: 10.1039/d0cc02471f] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible-light-driven three-component haloazidation cyclization of 1,5-enynes having cyano groups with TMSN3 and N-iodo(bromo/chloro)succinimide (NIS/NCS/NBS) under metal-free conditions was developed.
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Affiliation(s)
- Long Zou
- Advanced Research Institute and Department of Chemistry
- Taizhou University
- Taizhou
- Zhejiang
- P. R. China
| | - Lei Wang
- Advanced Research Institute and Department of Chemistry
- Taizhou University
- Taizhou
- Zhejiang
- P. R. China
| | - Li Sun
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
| | - Xiaofei Xie
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
| | - Pinhua Li
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
- State Key Laboratory of Organometallic Chemistry
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38
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Ghotekar GS, Shirsath SR, Shaikh AC, Muthukrishnan M. 1,6-Conjugate addition initiated formal [4+2] annulation of p-quinone methides with sulfonyl allenols: a unique access to spiro[5.5]undeca-1,4-dien-3-one scaffolds. Chem Commun (Camb) 2020; 56:5022-5025. [DOI: 10.1039/d0cc01005g] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An expedient one-pot synthesis of carbocyclic spiro[5.5]undeca-1,4-dien-3-ones via 1,6-conjugate addition initiated formal [4+2] annulation sequences by employing p-quinone methides and sulfonyl allenols.
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Affiliation(s)
- Ganesh S. Ghotekar
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Sachin R. Shirsath
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Aslam C. Shaikh
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - M. Muthukrishnan
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
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39
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Wu QL, Guo J, Huang GB, Chan ASC, Weng J, Lu G. Visible-light-promoted radical cross-coupling of para-quinone methides with N-substituted anilines: an efficient approach to 2,2-diarylethylamines. Org Biomol Chem 2020; 18:860-864. [DOI: 10.1039/c9ob02600b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of 2,2-diarylethylamines were accessed via visible-light-promoted radical cross-coupling of p-QMs with N-alkyl anilines.
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Affiliation(s)
- Qiao-Lei Wu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Jing Guo
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Gong-Bin Huang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Albert S. C. Chan
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Jiang Weng
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Gui Lu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
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40
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Okamoto N, Sueda T, Minami H, Yanada R. Inter- and Intramolecular Alkyne-Carbonyl Metathesis/1,6-Addition/Oxidative Aromatization Tandem Reactions between 1,6-Diynes and Aldehydes. Org Lett 2019; 21:8847-8851. [PMID: 31633934 DOI: 10.1021/acs.orglett.9b03494] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report an efficient synthetic route to 9-arylfluorenes and biaryl compounds from 1,6-diynes and aldehydes via inter- and intramolecular alkyne-carbonyl metathesis/1,6-addition/oxidative aromatization reactions. These tandem reactions are initiated by a BF3·Et2O-promoted tandem inter- and intramolecular alkyne-carbonyl metathesis of 1,6-diynes with carbonyl compounds followed by an In(OTf)3-catalyzed 1,6-addition/oxidative aromatization with iodobenzene diacetate.
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Affiliation(s)
- Noriko Okamoto
- Faculty of Pharmaceutical Sciences , Hiroshima International University , 5-1-1 Hirokoshingai , Kure , Hiroshima 737-0112 , Japan
| | - Takuya Sueda
- Faculty of Pharmaceutical Sciences , Hiroshima International University , 5-1-1 Hirokoshingai , Kure , Hiroshima 737-0112 , Japan
| | - Hideki Minami
- Faculty of Pharmaceutical Sciences , Hiroshima International University , 5-1-1 Hirokoshingai , Kure , Hiroshima 737-0112 , Japan
| | - Reiko Yanada
- Faculty of Pharmaceutical Sciences , Hiroshima International University , 5-1-1 Hirokoshingai , Kure , Hiroshima 737-0112 , Japan
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41
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Liu Z, Xu H, Yao T, Zhang J, Liu L. Catalyst-Enabled Chemodivergent Construction of Alkynyl- and Vinyl-Substituted Diarylmethanes from p-Quinone Methides and Alkynes. Org Lett 2019; 21:7539-7543. [DOI: 10.1021/acs.orglett.9b02810] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhenli Liu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Haofeng Xu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Tengfei Yao
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Junliang Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
| | - Lu Liu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P.R. China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, P.R. China
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42
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Ni J, Jiang Y, Qi Z, Yan R. TFAA-Catalyzed Annulation Synthesis of Spiro Pyrrolo[1,2-a]quinoxaline Derivatives from 1-(2-Aminophenyl)pyrroles and Benzoquinones/Ketones. Chem Asian J 2019; 14:2898-2902. [PMID: 31283108 DOI: 10.1002/asia.201900567] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/07/2019] [Indexed: 12/31/2022]
Abstract
A metal-free trifluorosulfonate anhydride (TFAA)-catalyzed strategy for the synthesis of spiro pyrrolo[1,2-a]quinoxalines from 1-(2-aminophenyl)pyrroles and benzoquinones/ketones has been developed. With this general method, spiro pyrrolo[1,2-a]quinoxalines have been accessed via nucleophilic addition and cyclization. This reaction exhibits good functional group tolerance, and a wide range of products are obtained in moderate to good yields.
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Affiliation(s)
- Jixiang Ni
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Yong Jiang
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing, China
| | - Zhenjie Qi
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China
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43
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Aher YN, Pawar AB. Catalyst- and reagent-free 1,6-hydrophosphonylation of p-quinone methides: a practical approach for the synthesis of diarylmethyl phosphine oxides. Org Biomol Chem 2019; 17:7536-7546. [PMID: 31369029 DOI: 10.1039/c9ob01326a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We developed a catalyst-, reagent-, and additive-free protocol with 100% atom economy for the synthesis of diarylmethyl phosphine oxides via 1,6-hydrophosphonylation of p-quinone methides using water as a green solvent. The reaction showed broad scope with excellent functional group tolerance. The practicability of this method was demonstrated by carrying out the reaction on the gram scale whereby product was obtained in high yield by the filtration technique avoiding chromatographic purification.
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Affiliation(s)
- Yogesh N Aher
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
| | - Amit B Pawar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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44
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Su Y, Zhao Y, Chang B, Zhao X, Zhang R, Liu X, Huang D, Wang KH, Huo C, Hu Y. [3 + 2] Cycloaddition of para-Quinone Methides with Nitrile Imines: Approach to Spiro-pyrazoline-cyclohexadienones. J Org Chem 2019; 84:6719-6728. [PMID: 31021088 DOI: 10.1021/acs.joc.9b00434] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
[3 + 2] cycloaddition of para-quinone methides with nitrile imines under mild conditions has been achieved. The corresponding spiro-pyrazoline-cyclohexadienone products were constructed in good to excellent yields (up to 97% yield) with high regioselectivity. This straightforward protocol exhibits good functional group tolerance and scalability and provides the spiro-pyrazoline-cyclohexadienones.
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Affiliation(s)
- Yingpeng Su
- College of Chemistry and Chemical Engineering , Northwest Normal University , 967 Anning East Road , Lanzhou 730070 , P. R. China
| | - Yanan Zhao
- College of Chemistry and Chemical Engineering , Northwest Normal University , 967 Anning East Road , Lanzhou 730070 , P. R. China
| | - Bingbing Chang
- College of Chemistry and Chemical Engineering , Northwest Normal University , 967 Anning East Road , Lanzhou 730070 , P. R. China
| | - Xiaolong Zhao
- College of Chemistry and Chemical Engineering , Northwest Normal University , 967 Anning East Road , Lanzhou 730070 , P. R. China
| | - Rong Zhang
- College of Chemistry and Chemical Engineering , Northwest Normal University , 967 Anning East Road , Lanzhou 730070 , P. R. China
| | - Xuan Liu
- College of Chemistry and Chemical Engineering , Northwest Normal University , 967 Anning East Road , Lanzhou 730070 , P. R. China
| | - Danfeng Huang
- College of Chemistry and Chemical Engineering , Northwest Normal University , 967 Anning East Road , Lanzhou 730070 , P. R. China
| | - Ke-Hu Wang
- College of Chemistry and Chemical Engineering , Northwest Normal University , 967 Anning East Road , Lanzhou 730070 , P. R. China
| | - Congde Huo
- College of Chemistry and Chemical Engineering , Northwest Normal University , 967 Anning East Road , Lanzhou 730070 , P. R. China
| | - Yulai Hu
- College of Chemistry and Chemical Engineering , Northwest Normal University , 967 Anning East Road , Lanzhou 730070 , P. R. China
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45
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Deacylative 1,6-addition of Bestmann-Ohira reagent to p-quinone methides for the synthesis of α-diazo-β-diarylphosphonates and cis-stilbenyl phosphonates. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.02.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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46
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Guo J, Huang GB, Wu QL, Xie Y, Weng J, Lu G. An efficient approach to access 1,1,2-triarylethanes enabled by the organo-photoredox-catalyzed decarboxylative addition reaction. Org Chem Front 2019. [DOI: 10.1039/c9qo00380k] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient approach to access 1,1,2-triarylethanes enabled by organo-photoredox-catalyzed decarboxylative 1,6-conjugate addition of carboxylic acids to p-QMs.
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Affiliation(s)
- Jing Guo
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Gong-Bin Huang
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Qiao-Lei Wu
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Ying Xie
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Jiang Weng
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Gui Lu
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
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47
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Wang J, Pan X, Zhao L, Zhao L, Liu J, Zhi Y, Wang A, Zhao K, Hu L. Diastereoselective construction of 3-aryl-substituted indolines via annulation of in situ generated p-quinone methides. Org Biomol Chem 2019; 17:10158-10162. [DOI: 10.1039/c9ob02351h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A highly diastereoselective [4 + 1] annulation reaction of in situ generated p-quinone methides for the synthesis of 3-aryl-substituted indolines has been developed.
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Affiliation(s)
- Junwei Wang
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy
- Nanjing University of Chinese Medicine
- Nanjing
- PR China
| | - Xiang Pan
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy
- Nanjing University of Chinese Medicine
- Nanjing
- PR China
| | - Lei Zhao
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy
- Nanjing University of Chinese Medicine
- Nanjing
- PR China
| | - Lin Zhao
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy
- Nanjing University of Chinese Medicine
- Nanjing
- PR China
| | - Jian Liu
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy
- Nanjing University of Chinese Medicine
- Nanjing
- PR China
| | - Ying Zhi
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy
- Nanjing University of Chinese Medicine
- Nanjing
- PR China
| | - Ai Wang
- Institute of Molecular Science
- Shanxi University
- Taiyuan
- PR China
| | - Kun Zhao
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy
- Nanjing University of Chinese Medicine
- Nanjing
- PR China
| | - Lihong Hu
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy
- Nanjing University of Chinese Medicine
- Nanjing
- PR China
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48
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Li Q, Yin Y, Li Y, Zhang J, Huang M, Kim JK, Wu Y. A simple approach to indeno-coumarins via visible-light-induced cyclization of aryl alkynoates with diethyl bromomalonate. Org Chem Front 2019. [DOI: 10.1039/c9qo00795d] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Visible-light-induced triple-domino cyclization between aryl alkynoates and diethyl bromomalonate was developed for the synthesis of indeno-coumarins.
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Affiliation(s)
- Qingrui Li
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Yunnian Yin
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Yabo Li
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Jianye Zhang
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Mengmeng Huang
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Jung Keun Kim
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
| | - Yangjie Wu
- College of Chemistry and Molecular Engineering
- Henan Key Laboratory of Chemical Biology and Organic Chemistry
- Key Laboratory of Applied Chemistry of Henan Universities
- Zhengzhou University
- Zhengzhou
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49
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Tan Y, Jia S, Hu F, Liu Y, Peng L, Li D, Yan H. Enantioselective Construction of Vicinal Diaxial Styrenes and Multiaxis System via Organocatalysis. J Am Chem Soc 2018; 140:16893-16898. [DOI: 10.1021/jacs.8b09893] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yu Tan
- Chongqing Key Laboratory of Natural Product Synthesis
and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, People’s Republic of China
| | - Shiqi Jia
- Chongqing Key Laboratory of Natural Product Synthesis
and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, People’s Republic of China
| | - Fangli Hu
- Chongqing Key Laboratory of Natural Product Synthesis
and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, People’s Republic of China
| | - Yidong Liu
- Chongqing Key Laboratory of Natural Product Synthesis
and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, People’s Republic of China
| | - Lei Peng
- Chongqing Key Laboratory of Natural Product Synthesis
and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, People’s Republic of China
| | - Dongmei Li
- Chongqing Key Laboratory of Natural Product Synthesis
and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, People’s Republic of China
| | - Hailong Yan
- Chongqing Key Laboratory of Natural Product Synthesis
and Drug Research, School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, People’s Republic of China
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50
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Wang J, Pan X, Liu J, Zhao L, Zhi Y, Zhao K, Hu L. Diastereoselective Synthesis of Tetrahydroquinolines via [4 + 2] Annulation between in Situ Generated p-Quinone Methides and Nitroalkenes. Org Lett 2018; 20:5995-5998. [DOI: 10.1021/acs.orglett.8b02127] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Junwei Wang
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Xiang Pan
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Jian Liu
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Lin Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Ying Zhi
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Kun Zhao
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
| | - Lihong Hu
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Stake Key Laboratory Cultivation Base for TCM Quality and Efficacy, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, PR China
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