1
|
Zhao P, Zhou Y, Wang C, Wu AX. Iodine-Promoted Thioylation and Dicarbonylation of Enaminone α-C Sites: Synthesis of Fully Substituted Thiazoles via C═C Bond Cleavage. J Org Chem 2024; 89:2505-2515. [PMID: 38315825 DOI: 10.1021/acs.joc.3c02539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
A novel iodine-promoted difunctionalization of α-C sites in enaminones was demonstrated as a means of synthesizing a variety of fully substituted thiazoles by constructing C-C(CO), C-S, and C-N bonds. This transformation allows the realization of enaminones as unusual aryl C2 synthons and simultaneously allows the thioylation and dicarbonylation of α-C sites. A preliminary mechanistic study was performed and indicated that the cleavage of C═C bonds in enaminones involves a bicyclization/ring-opening and oxidative coupling sequence.
Collapse
Affiliation(s)
- Peng Zhao
- Institute of Advanced Studies, School of Pharmaceutical Sciences, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - You Zhou
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Can Wang
- Institute of Advanced Studies, School of Pharmaceutical Sciences, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
| | - An-Xin Wu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| |
Collapse
|
2
|
Xiao W, Li F, Liu X, Cao W, Feng X. Catalytic Asymmetric Synthesis of Axially and Centrally Chiral 1,2-Dihydrobenzofuro[3,2- b]pyridines through a [2 + 2] Cycloaddition/Retroelectrocyclization/Re-Cycloaddition Cascade. Org Lett 2023; 25:8005-8009. [PMID: 37906677 DOI: 10.1021/acs.orglett.3c03183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
A catalytic asymmetric tandem cyclization of azadienes and ortho-alkynylnaphthols accelerated by the chiral N,N'-dioxide-gadolinium(III) complex is disclosed. This method allows the synthesis of a range of 1,2-dihydrobenzofuro[3,2-b]pyridines containing both axially and centrally chiral elements in high yields and excellent stereoselectivities (up to >99% yield, 91:9 dr, 98% ee). A control experiment revealed that this process proceeded through a multistep [2 + 2] cycloaddition/retroelectrocyclization/tautomerism/1,6-conjugate addition cascade.
Collapse
Affiliation(s)
- Wanlong Xiao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Fang Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Weidi Cao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| |
Collapse
|
3
|
Cai LY, Song XQ, Wang K, Zhang Y, Zhao HW. Pd-catalyzed decarboxylative 1,4-addition reactions of benzofuran-based azadienes with allyl phenyl carbonates. Org Biomol Chem 2023; 21:6556-6564. [PMID: 37525936 DOI: 10.1039/d3ob00968h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Under the catalysis of Pd(OAc)2/dppf/Na2CO3, the decarboxylative 1,4-addition reaction of benzofuran-based azadienes with allyl phenyl carbonates took place easily and delivered the desired products in reasonable chemical yields. The chemical structure of the target compounds was clearly identified by single crystal X-ray structural analysis.
Collapse
Affiliation(s)
- Lu-Yu Cai
- College of Life Science and Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China.
| | - Xiu-Qing Song
- Large-scale Instruments and Equipments Sharing Platform, Beijing University of Technology, Beijing 100124, P. R. China
| | - Kuo Wang
- College of Life Science and Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China.
| | - Yue Zhang
- College of Life Science and Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China.
| | - Hong-Wu Zhao
- College of Life Science and Bio-engineering, Beijing University of Technology, Beijing 100124, P. R. China.
| |
Collapse
|
4
|
Sun J, Zhang W, Song R, Yang D, Lv J. Divergent Coupling of ortho-Alkynylnaphthols and Benzofurans: [4 + 2] Cycloaddition and Friedel-Crafts Reaction. J Org Chem 2023; 88:442-454. [PMID: 36520642 DOI: 10.1021/acs.joc.2c02431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Catalytic direct [4 + 2] cycloaddition reactions and Friedel-Crafts reactions of ortho-alkynylnaphthols with benzofurans have been developed, affording functionalized hydrobenzofuro[3,2-b]chromans and hydroarylation products, respectively, in high yields with high chemoselectivity.
Collapse
Affiliation(s)
- Jiaying Sun
- Key Laboratory of Optic-Electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Wenxuan Zhang
- Key Laboratory of Optic-Electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Ran Song
- Key Laboratory of Optic-Electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Daoshan Yang
- Key Laboratory of Optic-Electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| | - Jian Lv
- Key Laboratory of Optic-Electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
| |
Collapse
|
5
|
Zhang W, Song R, Yang D, Lv J. Construction of Axially Chiral Styrenes Linking an Indole Moiety by Chiral Phosphoric Acid. J Org Chem 2022; 87:2853-2863. [DOI: 10.1021/acs.joc.1c02750] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wenxuan Zhang
- Key Laboratory of Optic-Electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Ran Song
- Key Laboratory of Optic-Electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Daoshan Yang
- Key Laboratory of Optic-Electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Jian Lv
- Key Laboratory of Optic-Electric Sensing and Analytic Chemistry for Life Science, MOE, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| |
Collapse
|
6
|
Li J, Liu S, Zhong R, Yang Y, Xu J, Yang J, Ding H, Wang Z. Cascade Cyclization of Azadienes with Difluoroenoxysilanes: A One-Pot Formal [4 + 2] Approach to Fluorinated Polyfused Heterocycles. Org Lett 2021; 23:9526-9532. [PMID: 34860022 DOI: 10.1021/acs.orglett.1c03745] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A TfOH-promoted synthesis of fluorinated polyfused heterocycles via the cascade cyclization of azadienes and difluoroenoxysilanes has been developed, leading to the facile construction of fluorinated benzofuro[3,2-b]pyridines, 5H-indeno[1,2-b]pyridines, and 5,6-dihydrobenzo[h]quinolines. This one-pot formal [4 + 2] approach involves 1,4-difluoroalkylation, desulfonylation, cyclization, and dehydrated and dehydrofluorinated aromatization and represents the first application of difluoroenoxysilane in cascade transformations. Furthermore, this methodology is highlighted by the synthesis of three fluoro analogues of bioactive molecules with potent topoisomerase inhibitory activities.
Collapse
Affiliation(s)
- Jinshan Li
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Saimei Liu
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Rong Zhong
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Yaqi Yang
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Jinjing Xu
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Jianguo Yang
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| | - Hanfeng Ding
- Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China
| | - Zhiming Wang
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, P. R. China
| |
Collapse
|
7
|
Hu Y, Shi W, Yan Z, Liao J, Liu M, Xu J, Wang W, Wu Y, Zhang C, Guo H. Base-Catalyzed Sequential 1,4-Addition/Intramolecular Cyclization/Aromatization Reaction: Synthesis of Benzofuro[3,2- b]pyridines. Org Lett 2021; 23:6780-6783. [PMID: 34432980 DOI: 10.1021/acs.orglett.1c02357] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
An efficient K2CO3-catalyzed 1,4-addition/intramolecular cyclization/aromatization reaction of aurone-derived 1-azadienes with trisubstituted allenoates has been developed, giving a series of benzofuro[3,2-b]pyridines in moderate to excellent yields. The reaction proceeded efficiently under an air atmosphere without the use of transition metal catalysts. This protocol provides a concise approach to benzofuro[3,2-b]pyridines.
Collapse
Affiliation(s)
- Yimin Hu
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Wangyu Shi
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Zhengyang Yan
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Jianning Liao
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Min Liu
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Jiaqing Xu
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Wei Wang
- College of Public Health, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Yongjun Wu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Cheng Zhang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Hongchao Guo
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| |
Collapse
|