1
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Pan J, Ho TO, Chen YC, Yang BM, Zhao Y. Enantioselective Construction of Eight-Membered N-Heterocycles from Simple 1,3-Dienes via Pd(0) Lewis Base Catalysis. Angew Chem Int Ed Engl 2024; 63:e202317703. [PMID: 38100515 DOI: 10.1002/anie.202317703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 12/17/2023]
Abstract
We report herein an unprecedented enantioselective (4+4) cycloaddition of simple 1,3-dienes with azadienes for the construction of fused eight-membered N-heterocycles. In this transformation, the π-Lewis basic Pd(0) catalyst achieves activation of 1,3-dienes to induce nucleophilic addition to azadienes followed by ring cyclization via a selective terminal allylic substitution. Furthermore, highly efficient and diastereoselective derivatizations of the eight-membered rings provide a facile access to diverse enantiopure fused tetra- to hexacyclic compounds with potential application in medicinal chemistry.
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Affiliation(s)
- Jiaoting Pan
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University Binhai New City, Fuzhou, 350207, China
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Takumi Ogawa Ho
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, P. R. China
| | - Bin-Miao Yang
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University Binhai New City, Fuzhou, 350207, China
| | - Yu Zhao
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University Binhai New City, Fuzhou, 350207, China
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
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2
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Ren Y, Shi W, Tang Y, Piao S, Yu S, Wu Y, Guo H. Phosphine-Catalyzed (3 + 2) Annulation of γ-Substituted Cinnamic Aldehyde-Derived Morita-Baylis-Hillman Carbonates through Remote Activation. Org Lett 2023; 25:7374-7379. [PMID: 37782039 DOI: 10.1021/acs.orglett.3c02887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
A series of γ-substituted Morita-Baylis-Hillman (MBH) carbonates were synthesized and subjected to phosphine-catalyzed annulations with electrophilic exocyclic alkenes, giving various valuable spirocyclopentenes in moderate to excellent yields with moderate to excellent diastereoselectivities. A large scope of MBH carbonates bearing γ-hydrogen, alkenyl, and alkynyl substituents was well tolerated. The annulation unprecedentedly involves β-, γ-, and δ-carbons of MBH carbonates.
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Affiliation(s)
- Yue Ren
- 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
| | - Yi Tang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Shixiang Piao
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
| | - Songcheng Yu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Yongjun Wu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, P. R. China
| | - Hongchao Guo
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P. R. China
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3
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Huang Y, Tan M, Wang N, Zhang Y, Yao H, Xiao X, Huang N, Zou K. Highly Regio- and Diastereoselective Phosphine-Catalyzed [2 + 4] Annulation of Benzofuran-Derived Azadienes with Allyl Carbonates: Access to Spiro[benzofuran-cyclohexanes]. J Org Chem 2023; 88:13030-13041. [PMID: 37648964 DOI: 10.1021/acs.joc.3c01154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
A novel highly regio- and diastereoselective phosphine-catalyzed [2 + 4] annulation of benzofuran-derived azadienes (BDAs) with acidic hydrogen-tethered allyl carbonates has been developed ingeniously. A range of functionalized spiro[benzofuran-cyclohexane] derivatives with two consecutive stereocenters were smoothly obtained in moderate to excellent yields under mild reaction conditions from readily available materials. Moreover, this method is a practical and scalable strategy that creates the core structural motif of the fungistatic drug, griseofulvin.
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Affiliation(s)
- Yifei Huang
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China
| | - Mengting Tan
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China
| | - Nengzhong Wang
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China
| | - Yufei Zhang
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China
| | - Hui Yao
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China
| | - Xiao Xiao
- Institute of Pharmaceutical Science and Technology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Nianyu Huang
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China
| | - Kun Zou
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China
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4
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Wei X, Huang Y, Karimi Z, Qu J, Wang B. DMAP-Catalyzed [4+3] Spiroannulation of Pyrazolone-Derived Morita-Baylis-Hillman Carbonates with N-( o-Chloromethyl)aryl Amides to Forge Spiro[pyrazolone-azepine] Scaffolds. J Org Chem 2023. [PMID: 37389982 DOI: 10.1021/acs.joc.3c00262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2023]
Abstract
A novel DMAP-catalyzed [4+3] spiroannulation of pyrazolone-derived Morita-Baylis-Hillman carbonates with N-(o-chloromethyl)aryl amides was developed. This reaction led to the assembly of medicinally relevant pyrazolone and azepine nuclei into a structurally new spirocyclic scaffold, and a diverse array of spiro[pyrazolone-azepine] products were afforded in good to excellent yields (up to 93%) with a wide substrate scope (23 examples) under mild conditions. Moreover, a gram-scale reaction and product transformations were conducted, which further increased the diversity of products.
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Affiliation(s)
- Xingfu Wei
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yue Huang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Zahra Karimi
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, Department of Pharmaceutical Sciences, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
- Ningbo Institute of Dalian University of Technology, Ningbo 315016, P. R. China
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5
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Remote stereocontrol in the (4 + 2) cycloadditions of 1,7-zwitterions: Asymmetric synthesis of multifunctionalized tetrahydroquinoline derivatives. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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6
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A Lewis Acid-Promoted Michael Addition and Ring-Expansion Cascade for the Construction of Nitrogen-Containing Medium-Sized Rings. Molecules 2023; 28:molecules28041650. [PMID: 36838638 PMCID: PMC9966210 DOI: 10.3390/molecules28041650] [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: 12/26/2022] [Revised: 02/03/2023] [Accepted: 02/04/2023] [Indexed: 02/11/2023] Open
Abstract
A Lewis acid-promoted annulation of azadienes and cyclobutamines was developed. This reaction proceeded through Michael addition and ring-expansion cascade, affording the corresponding nitrogen-containing medium-sized rings with a broad scope in moderate to high yields. The catalytic asymmetric version of this reaction has also been explored using a chiral base.
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7
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Li L, Liu T, Ren W, Wang Y. Catalyst-free and atom-economical [4+3] cycloaddition of azadienes with cyclic azomethine imines for facile synthesis of 1,2,4-triazepines. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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8
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Liao J, Han Q, Liu M, Shi W, Xu J, Wang W, Wu Y, GUO H. Phosphine‐Catalyzed (4+2) Annulation of Alkenes with Acidic Hydrogen‐Tethered Allylic Carbonates. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | - Min Liu
- China Agricultural University CHINA
| | | | | | - Wei Wang
- China Agricultural University CHINA
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9
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Shi W, Ren Y, Zhao H, Tang Y, Piao S, Mao B, Wang W, Wu Y, Wang B, Guo H. Phosphine-Catalyzed (4 + 2) Annulation of Allenoates with Benzofuran-Derived Azadienes and Subsequent Thio-Michael Addition. Org Lett 2022; 24:3747-3752. [PMID: 35549282 DOI: 10.1021/acs.orglett.2c01500] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A phosphine-catalyzed (4 + 2) annulation of tetrahydrobenzofuranone-derived allenoates and benzofuran-derived azadienes (BDAs) has been achieved to construct the decahydro-2H-naphtho[1,8-bc]furan derivatives, which were subsequently treated with 4-methylbenzenethiol and trimethylamine to produce thio-Michael addition products in high to excellent yields with good diastereoselectivities.
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Affiliation(s)
- Wangyu Shi
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, PR China
| | - Yue Ren
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, PR China
| | - Haoran Zhao
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, PR China
| | - Yi Tang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, PR China
| | - Shixiang Piao
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, PR China
| | - Biming Mao
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, PR China
| | - Wei Wang
- College of Public Health, Zhengzhou University, Zhengzhou 450001, PR China
| | - Yongjun Wu
- College of Public Health, Zhengzhou University, Zhengzhou 450001, PR China
| | - Bo Wang
- Department of Chemistry, Tsinghua University, Beijing 100084, PR China
| | - Hongchao Guo
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, PR China
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10
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Lin J, Zhu Y, Cai W, Huang Y. Phosphine-Mediated Sequential [2+4]/[2+3] Annulation to Construct Pyrroloquinolines. Org Lett 2022; 24:1593-1597. [PMID: 35179034 DOI: 10.1021/acs.orglett.1c04388] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A domino [2+4]/[2+3] sequential annulation reaction of MBH carbonates with N-unprotected indoles has been developed to provide various pyrroloquinoline derivatives in ≤94% yield and 20:1 dr. The reaction could be either mediated by stoichiometric PCy3 or catalyzed by R3PO via PIII/PV═O redox cycling in the presence of phenylsilane. This method assembles polycyclic 1,7-fused indoles in one step diastereoselectively.
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Affiliation(s)
- Junhui Lin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yannan Zhu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Wei Cai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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11
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Tu L, Gao L, Wang Q, Cao Z, Huang R, Zheng Y, Liu J. Substrate-Switched Chemodivergent Pyrazole and Pyrazoline Synthesis: [3 + 2] Cycloaddition/Ring-Opening Rearrangement Reaction of Azadienes with Nitrile Imines. J Org Chem 2022; 87:3389-3401. [PMID: 35157462 DOI: 10.1021/acs.joc.1c02998] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
By virtue of a fundamentally new reaction model of benzofuran-derived azadienes (BDAs), an unprecedented synthesis of biologically important pyrazoles has been achieved through a tandem [3 + 2] cycloaddition/ring-opening rearrangement reaction of BDAs with nitrile imines. The nature and type of substrates are found to act as a chemical switch to trigger two distinct reaction pathways. A minor modification to the substrates allows the access to spiro-pyrazolines.
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Affiliation(s)
- Liang Tu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Limei Gao
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Qiang Wang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Zhixing Cao
- Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Rong Huang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Yongsheng Zheng
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China.,National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan 430074, China
| | - Jikai Liu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
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12
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Liao J, Xu J, Wu Y, Hou Y, GUO H. 4‐(Dimethylamino)pyridine‐Catalyzed (3+2) Annulation of Pyrazoledione‐Derived Morita–Baylis–Hillman Carbonates with 2‐Arylideneindane‐1,3‐diones: An Access to Dispirocyclic Compounds. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101251] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Khan A, Silva LF, Rabnawaz M. Iodine(III)‐Promoted Ring Expansion Reactions: A Metal‐Free Approach toward Seven‐Membered Heterocyclic Rings. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ajmir Khan
- School of Packaging Michigan State University 448 Wilson Road East Lansing MI 48824-1223 USA
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 São Paulo SP CEP 05508-000 Brazil
| | - Luiz F. Silva
- Department of Fundamental Chemistry Institute of Chemistry University of São Paulo Av. Prof. Lineu Prestes, 748 São Paulo SP CEP 05508-000 Brazil
| | - Muhammad Rabnawaz
- School of Packaging Michigan State University 448 Wilson Road East Lansing MI 48824-1223 USA
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14
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Cai W, Zhou Y, He Y, Huang Y. DABCO catalyzed [4+2] annulations of Morita-Baylis-Hillman carbonates with isocyanates. Chem Commun (Camb) 2021; 57:8985-8988. [PMID: 34486589 DOI: 10.1039/d1cc03502a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly concise method for 1,4-diazabicyclo[2.2.2]octane (DABCO) catalyzed [4+2] annulations of o-amino-acylation of aryl MBH carbonates with isocyanates has been developed. For the first time, MBH carbonates served as 1,4-dipoles, providing functionalized 3,4-dihydroquinazolinones in mild conditions with good to excellent yields. The density functional theory calculations of the mechanism supports our hypothesis.
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Affiliation(s)
- Wei Cai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Yiming Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Yanlin He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
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15
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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.
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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
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16
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Cai W, He Y, Zhou Y, Huang Y. Catalyst-Controlled Divergent Intramolecular Cyclizations of Morita-Baylis-Hillman Carbonates. J Org Chem 2021; 86:12267-12276. [PMID: 34423976 DOI: 10.1021/acs.joc.1c01618] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Unprecedented catalyst-controlled divergent cyclizations of Morita-Baylis-Hillman carbonates have been established using either Cs2CO3 or quinuclidine as the catalyst. 1,2-Dihydroquinolines and 4H-3,1-benzoxazines were efficiently synthesized via SN2' and SN2'-SN2' processes, respectively. DFT calculations have led to a deeper understanding of these reaction modes and chemoselectivity.
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Affiliation(s)
- Wei Cai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Yanlin He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Yiming Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
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17
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Cai W, Zhou Y, He Y, Chen K, Yu C, Huang Y. Designing and Accurately Developing a [6 + 2] Dipolar Cycloaddition for the Synthesis of Benzodiazocines. Org Lett 2021; 23:5430-5434. [PMID: 34196563 DOI: 10.1021/acs.orglett.1c01770] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
1,6-Dipolar cycloadditions represent a valuable strategy for the rapid construction of medium-sized rings. Herein, we describe the concept for the design of 1,6-dipoles that bypasses the regioselectivity. Through the introduction of an amino group into Morita-Baylis-Hillman (MBH) carbonates, unprecedented [6 + 2] dipolar cycloadditions were accurately developed with Cs2CO3, efficiently delivering a series of benzodiazocines in mild conditions. Computational studies bring a deeper understanding of this reaction.
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Affiliation(s)
- Wei Cai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Yiming Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Yanlin He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Kaihong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Cui Yu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
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18
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Li H, Shi W, Wang C, Liu H, Wang W, Wu Y, Guo H. Phosphine-Catalyzed Cascade Annulation of MBH Carbonates and Diazenes: Synthesis of Hexahydrocyclopenta[c]pyrazole Derivatives. Org Lett 2021; 23:5571-5575. [PMID: 34232667 DOI: 10.1021/acs.orglett.1c01975] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A phosphine-catalyzed cascade annulation of Morita-Baylis-Hillman (MBH) carbonates and diazenes was achieved, giving tetrahydropyrazole-fused heterocycles bearing two five-membered rings in moderate to excellent yields. The reaction underwent an unprecedented reaction mode of MBH carbonates, in which two molecules of MBH carbonates were fully merged into the ring system.
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Affiliation(s)
- Hongxiang Li
- 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
| | - Chang Wang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P.R. China
| | - Hao Liu
- 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
| | - Hongchao Guo
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, P.R. China
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19
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Feng Q, Wu A, Zhang X, Song L, Sun J. An unusual formal migrative cycloaddition of aurone-derived azadienes: synthesis of benzofuran-fused nitrogen heterocycles. Chem Sci 2021; 12:7953-7957. [PMID: 34168849 PMCID: PMC8188467 DOI: 10.1039/d1sc00941a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aurone-derived azadienes are well-known four-atom synthons for direct [4 + n] cycloadditions owing to their s-cis conformation as well as the thermodynamically favored aromatization nature of these processes. However, distinct from this common reactivity, herein we report an unusual formal migrative annulation with siloxy alkynes initiated by [2 + 2] cycloaddition. Unexpectedly, this process generates benzofuran-fused nitrogen heterocyclic products with formal substituent migration. This observation is rationalized by less common [2 + 2] cycloaddition followed by 4π and 6π electrocyclic events. DFT calculations provided support to the proposed mechanism.
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Affiliation(s)
- Qiang Feng
- Department of Chemistry, Shenzhen Research Institute, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
| | - An Wu
- Department of Chemistry, Shenzhen Research Institute, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China
| | - Xinhao Zhang
- Shenzhen Bay Laboratory, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School Shenzhen China
| | - Lijuan Song
- School of Science, Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China
| | - Jianwei Sun
- Department of Chemistry, Shenzhen Research Institute, The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR China .,The Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction Clear Water Bay Kowloon Hong Kong SAR China
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20
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Fairuz Binte Sheikh Ismail SN, Yang B, Zhao Y. Access to 5,6-Spirocycles Bearing Three Contiguous Stereocenters via Pd-Catalyzed Stereoselective [4 + 2] Cycloaddition of Azadienes. Org Lett 2021; 23:2884-2889. [PMID: 33769066 DOI: 10.1021/acs.orglett.1c00505] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We present herein a highly diastereo- and enantioselective Pd-catalyzed [4 + 2] cycloaddition of benzofuran-derived azadienes with vinyl benzoxazinanones, which represents a rare highly stereoselective cycloaddition of this class of fused azadienes as a two-atom synthon. The use of a phosphoramidite ligand bearing a chiral secondary amine with a simple biphenyl backbone proved to be the key to construct the novel spirocyclic tetrahydroquinoline scaffold containing three contiguous stereocenters as a single diastereomer in high enantioselectivity.
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Affiliation(s)
| | - Binmiao Yang
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Republic of Singapore
| | - Yu Zhao
- Department of Chemistry, National University of Singapore, 4 Science Drive 2, Singapore 117544, Republic of Singapore.,Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China
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21
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Lam H, Lautens M, Abel-Snape X, Köllen MF. Recent Advances in Transition-Metal-Free (4+3)-Annulations. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1706023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Abstract(4+3)-Annulations are incredibly versatile reactions which combine a 4-atom synthon and a 3-atom synthon to form both 7-membered carbocycles as well as heterocycles. We have previously reviewed transition-metal-catalyzed (4+3)-annulations. In this review, we will cover examples involving bases, NHCs, phosphines, Lewis and Brønsted acids as well as some rare examples of boronic acid catalysis and photocatalysis. In analogy to our previous review, we exclude annulations involving cyclic dienes like furan, pyrrole, cyclohexadiene or cyclopentadiene, as Chiu, Harmata, Fernándes and others have recently published reviews encompassing such substrates. We will however discuss the recent additions (2010–2020) to the literature on (4+3)-annulations involving other types of 4-atom-synthons.1 Introduction2 Bases3 Annulations Using N-Heterocyclic Carbenes3.1 N-Heterocyclic Carbenes (NHCs)3.2 N-Heterocyclic Carbenes and Base Dual-Activation4 Phosphines5 Acids5.1 Lewis Acids5.2 Brønsted Acids6 Boronic Acid Catalysis and Photocatalysis7 Conclusion
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Affiliation(s)
- Heather Lam
- Davenport Research Laboratories, Department of Chemistry, University of Toronto
| | - Mark Lautens
- Davenport Research Laboratories, Department of Chemistry, University of Toronto
| | - Xavier Abel-Snape
- Davenport Research Laboratories, Department of Chemistry, University of Toronto
| | - Martin F. Köllen
- Ludwig-Maximilians-Universität München, Department Chemie und Biochemie
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22
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Liu K, Yang J, Li X. Palladium-Catalyzed Diastereo- and Enantioselective [3 + 2] Cycloaddition of Vinylcyclopropanes with Azadienes: Efficient Access to Chiral Spirocycles. Org Lett 2021; 23:826-831. [DOI: 10.1021/acs.orglett.0c04062] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kai Liu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Jianfeng Yang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Xiaoxun Li
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
- Suzhou Institute of Shandong University, NO. 388 Ruoshui Road, SIP, Suzhou, Jiangsu 215123, China
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23
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Gao Y, Song X, Yan RJ, Du W, Chen YC. Asymmetric β,γ′-regioselective [4 + 3] and [4 + 2] annulations of α-vinylenals via cascade iminium ion-dienamine catalysis. Org Biomol Chem 2021; 19:151-155. [PMID: 33112340 DOI: 10.1039/d0ob02068k] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
α-Vinylenal substrates have been designed and applied in β,γ′-regioselective asymmetric [4 + 3] and [4 + 2] annulation reactions via cascade aminocatalysis.
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Affiliation(s)
- Yang Gao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
| | - Xue Song
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
| | - Ru-Jie Yan
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
- China
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24
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Huang Y, Liao J, Wang W, Liu H, Guo H. Synthesis of heterocyclic compounds through nucleophilic phosphine catalysis. Chem Commun (Camb) 2020; 56:15235-15281. [PMID: 33320123 DOI: 10.1039/d0cc05699e] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Nucleophilic phosphine catalysis is a practical and powerful tool for the synthesis of various heterocyclic compounds with the advantages of environmentally friendly, metal-free, and mild reaction conditions. The present report summarizes the construction of four to eight-membered heterocyclic compounds containing nitrogen, oxygen and sulphur atoms through phosphine-catalyzed intramolecular annulations and intermolecular [2+2], [3+2], [4+1], [3+1+1], [5+1], [4+2], [2+2+2], [3+3], [4+3] and [3+2+3] annulations of electron-deficient alkenes, allenes, alkynes and Morita-Baylis-Hillman carbonates.
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Affiliation(s)
- Yifan Huang
- Department of Chemistry and Innovation Center of Pesticide Research, China Agricultural University, Beijing 100193, China.
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25
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Deng Q, Meng X. Recent Advances in the Cycloaddition Reactions of 2‐Benzylidene‐1‐benzofuran‐3‐ones, and Their Sulfur, Nitrogen and Methylene Analogues. Chem Asian J 2020; 15:2838-2853. [DOI: 10.1002/asia.202000550] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 07/13/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Qingsong Deng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion Tianjin Key Laboratory of Drug Targeting and Bioimaging School of Chemistry & Chemical Engineering Tianjin University of Technology Tianjin 300384 P.R. China
| | - Xiangtai Meng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion Tianjin Key Laboratory of Drug Targeting and Bioimaging School of Chemistry & Chemical Engineering Tianjin University of Technology Tianjin 300384 P.R. China
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26
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Selvaraj K, Chauhan S, Sandeep K, Swamy KCK. Advances in [4+3]‐Annulation/Cycloaddition Reactions Leading to Homo‐ and Heterocycles with Seven‐Membered Rings. Chem Asian J 2020; 15:2380-2402. [DOI: 10.1002/asia.202000545] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/06/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Karuppu Selvaraj
- School of ChemistryUniversity of Hyderabad Hyderabad-500046 Telangana India
| | - Sachin Chauhan
- School of ChemistryUniversity of Hyderabad Hyderabad-500046 Telangana India
| | - K. Sandeep
- School of ChemistryUniversity of Hyderabad Hyderabad-500046 Telangana India
| | - K. C. Kumara Swamy
- School of ChemistryUniversity of Hyderabad Hyderabad-500046 Telangana India
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27
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Fang QY, Yi MH, Wu XX, Zhao LM. Regio- and Diastereoselective Spirocyclopropanation of Benzofuran-Derived Azadienes through 1,4-Addition-Induced Dearomatization Reaction under Mild Conditions. Org Lett 2020; 22:5266-5270. [DOI: 10.1021/acs.orglett.0c01987] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qing-Yun Fang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
| | - Meng-Hao Yi
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
| | - Xiao-Xia Wu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
| | - Li-Ming Zhao
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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28
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Yan RJ, Liu BX, Xiao BX, Du W, Chen YC. Asymmetric (4 + 3) and (4 + 1) Annulations of Isatin-derived Morita–Baylis–Hillman Carbonates to Construct Diverse Chiral Heterocyclic Frameworks. Org Lett 2020; 22:4240-4244. [PMID: 32412770 DOI: 10.1021/acs.orglett.0c01283] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Ru-Jie Yan
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Bao-Xin Liu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ben-Xian Xiao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
- College of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
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29
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Ma S, Yu A, Zhang S, Zhang L, Meng X. Construction of [6-5-5-6-6] Pentacyclic Skeleton via a Phosphine-Catalyzed Domino Reaction and Mechanism Study. J Org Chem 2020; 85:7884-7895. [DOI: 10.1021/acs.joc.0c00566] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Shanshan Ma
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry & Chemical Engineering Tianjin University of Technology, Tianjin 300384, P.R. China
| | - Aimin Yu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry & Chemical Engineering Tianjin University of Technology, Tianjin 300384, P.R. China
| | - Shunguang Zhang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry & Chemical Engineering Tianjin University of Technology, Tianjin 300384, P.R. China
| | - Lei Zhang
- Tianjin Engineering Technology Center of Chemical Wastewater Source Reduction and Recycling, School of Science, Tianjin Chengjian University, Tianjin 300384, P.R. China
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Xiangtai Meng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry & Chemical Engineering Tianjin University of Technology, Tianjin 300384, P.R. China
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30
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Li T, Yang Z, Song Z, Chauvin R, Cui X. Rhodium(III)-Catalyzed [4+3] Annulation of N-Aryl-pyrazolidinones and Propargylic Acetates: Access to Benzo[c][1,2]diazepines. Org Lett 2020; 22:4078-4082. [DOI: 10.1021/acs.orglett.0c01139] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Tingfang Li
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
| | - Zi Yang
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
| | - Zhenyu Song
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
| | - Remi Chauvin
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
- LCC-CNRS, Université de Toulouse, UPS, 205 route de Narbonne, 31077 Toulouse, France
| | - Xiuling Cui
- Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Key Laboratory of Precision Medicine and Molecular Diagnosis of Fujian Universities, Key Laboratory of Xiamen Marine and Gene Drugs, School of Biomedical Sciences, Huaqiao University, Xiamen 361021, P. R. China
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31
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Duan K, An XD, Li LF, Sun LL, Qiu B, Li XJ, Xiao J. Hydride Transfer Initiated Redox-Neutral Cascade Cyclizations of Aurones: Facile Access to [6,5] Spirocycles. Org Lett 2020; 22:2537-2541. [PMID: 32186385 DOI: 10.1021/acs.orglett.0c00309] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Reported herein is the hydride transfer initiated redox-neutral cascade cyclizations of aurones, providing a variety of [6,5] spiro-heterocycles in satisfactory yields and good diastereoselectivities.
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Affiliation(s)
- Kang Duan
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xiao-De An
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Long-Fei Li
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Lian-Lian Sun
- The Affiliated Hospital of Huizhou Health Sciences Polytechnic, Huizhou, 516025, China
| | - Bin Qiu
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xian-Jiang Li
- Shandong Kangqiao Biotechnology Co. Ltd., Binzhou, 256500, China
| | - Jian Xiao
- School of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, China.,School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
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32
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Asymmetric Remote Addition Reactions of Heterocycle-Based Dearomative Dienamine or Trienamine Species to 1-Azadienes: Application to Construct Chiral Azocanes and Azecanes. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901848] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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33
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Deng Q, Li SJ, Wei D, Lan Y. Insights into Lewis base-catalyzed chemoselective [3 + 2] and [3 + 4] annulation reactions of MBH carbonates. Org Chem Front 2020. [DOI: 10.1039/d0qo00457j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chemoselectivity of Lewis base-catalyzed [3 + 2] and [3 + 4] annulation reactions of MBH carbonates can be predicted using FMO overlap analysis.
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Affiliation(s)
- Qianqian Deng
- College of Chemistry
- and Institute of Green Catalysis
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Shi-Jun Li
- College of Chemistry
- and Institute of Green Catalysis
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Donghui Wei
- College of Chemistry
- and Institute of Green Catalysis
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| | - Yu Lan
- College of Chemistry
- and Institute of Green Catalysis
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
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34
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Fang QY, Zhao LM. A [4+3] annulation of benzofuran-derived azadienes and α-bromohydroxamates for the synthesis of benzofuran-fused 1,4-diazepinones. Chem Commun (Camb) 2020; 56:14079-14082. [DOI: 10.1039/d0cc06061e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Cs2CO3-mediated formal [4+3] cycloaddition involving benzofuran-derived azadienes (BDAs) and α-bromohydroxamates to afford benzofuran-fused 1,4-diazepinones is established.
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Affiliation(s)
- Qing-Yun Fang
- School of Chemistry and Materials Science
- Jiangsu Normal University
- Xuzhou 221116
- China
| | - Li-Ming Zhao
- School of Chemistry and Materials Science
- Jiangsu Normal University
- Xuzhou 221116
- China
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
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35
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Xie YS, Huang RF, Li R, Zhang CB, Fu JY, Zhao LL, Yuan JF. Metal-free [3+3] benzannulation of 1-indanylidene-malononitrile with Morita–Baylis–Hillman carbonates: direct access to functionalized fluorene and fluorenone derivatives. Chem Commun (Camb) 2020; 56:1948-1951. [DOI: 10.1039/d0cc00143k] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient [3+3] benzannulation of Morita–Baylis–Hillman carbonates with 1-indanylidenemalononitrile was achieved selectively delivering a wide range of functional fluorene or fluorenone compounds in high yields (up to 86% yields).
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Affiliation(s)
- Ya-Sa Xie
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
| | - Run-Feng Huang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing
| | - Ran Li
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
| | - Chuan-Bao Zhang
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
| | - Ji-Ya Fu
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
- Institute of Fine Chemistry and Engineering
| | - Li-Li Zhao
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing
| | - Jin-Fang Yuan
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
- China
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36
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Qiu H, Chen X, Zhang J. Design, synthesis and application of a new type of bifunctional Le-Phos in highly enantioselective γ-addition reactions of N-centered nucleophiles to allenoates. Chem Sci 2019; 10:10510-10515. [PMID: 32055374 PMCID: PMC6988743 DOI: 10.1039/c9sc04073k] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 09/01/2019] [Indexed: 12/20/2022] Open
Abstract
A novel class of cyclic phosphine derived bifunctional catalysts (Le-Phos) is reported, which can be readily prepared from inexpensive and commercially available starting materials and exhibit good performances in enantioselective γ-addition reactions of N-centered nucleophiles and allenoates under mild conditions. The salient features of this reaction include high product yields, good enantioselectivity, mild reaction conditions, and broad substrate scope and gram-scale scalability.
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Affiliation(s)
- Haile Qiu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes , School of Chemistry and Molecular Engineering , East China Normal University , 3663 N. Zhongshan Road , Shanghai , P. R. China (200062) .
| | - Xiaofeng Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes , School of Chemistry and Molecular Engineering , East China Normal University , 3663 N. Zhongshan Road , Shanghai , P. R. China (200062) .
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes , School of Chemistry and Molecular Engineering , East China Normal University , 3663 N. Zhongshan Road , Shanghai , P. R. China (200062) .
- Department of Chemistry , Fudan University , 2005 Songhu Road , Shanghai , P. R. China (200438) .
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37
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Dai Z, Zhu J, Wang J, Su W, Yang F, Zhou Q. Phosphine‐Catalyzed Chemoselective [4+3] Cycloaddition of Alminine Esters and β′‐acetoxy Allenoates for Divergent Synthesis of Azepines. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901132] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zonghao Dai
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry China Pharmaceutical University Nanjing 210009 People's Republic of China
| | - Jin Zhu
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry China Pharmaceutical University Nanjing 210009 People's Republic of China
| | - Jiahua Wang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry China Pharmaceutical University Nanjing 210009 People's Republic of China
| | - Wenbo Su
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry China Pharmaceutical University Nanjing 210009 People's Republic of China
| | - Fulai Yang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry China Pharmaceutical University Nanjing 210009 People's Republic of China
| | - Qingfa Zhou
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry China Pharmaceutical University Nanjing 210009 People's Republic of China
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38
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Xie HP, Sun L, Wu B, Zhou YG. Copper-Catalyzed Alkynylation/Cyclization/Isomerization Cascade for Synthesis of 1,2-Dihydrobenzofuro[3,2-b]pyridines and Benzofuro[3,2-b]pyridines. J Org Chem 2019; 84:15498-15507. [DOI: 10.1021/acs.joc.9b02512] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Huan-Ping Xie
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Lei Sun
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Bo Wu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Yong-Gui Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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39
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Xie HP, Wu B, Wang XW, Zhou YG. Chiral Brønsted acid-catalyzed conjugate addition of indoles to azadienes: Enantioselective synthesis of hetero-triarylmethanes. CHINESE JOURNAL OF CATALYSIS 2019. [DOI: 10.1016/s1872-2067(19)63396-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Fan T, Zhang ZJ, Zhang YC, Song J. Construction of All-Carbon Quaternary Stereocenters via Sequential Photoactivation/Isothiourea Catalysis. Org Lett 2019; 21:7897-7901. [DOI: 10.1021/acs.orglett.9b02892] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Tao Fan
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Zi-Jing Zhang
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Yu-Chen Zhang
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
| | - Jin Song
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China
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41
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Chen Z, Chen Z, Yang Z, Guo L, Du W, Chen Y. Cooperative Tertiary Amine/Chiral Iridium Complex Catalyzed Asymmetric [4+3] and [3+3] Annulation Reactions. Angew Chem Int Ed Engl 2019; 58:15021-15025. [DOI: 10.1002/anie.201907797] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 08/10/2019] [Indexed: 01/14/2023]
Affiliation(s)
- Zhi‐Chao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Zhi Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Zhen‐Hong Yang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Li Guo
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Ying‐Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
- College of Pharmacy Third Military Medical University Chongqing 400038 China
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42
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Chen Z, Chen Z, Yang Z, Guo L, Du W, Chen Y. Cooperative Tertiary Amine/Chiral Iridium Complex Catalyzed Asymmetric [4+3] and [3+3] Annulation Reactions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907797] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zhi‐Chao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Zhi Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Zhen‐Hong Yang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Li Guo
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Ying‐Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University Chengdu 610041 China
- College of Pharmacy Third Military Medical University Chongqing 400038 China
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43
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Chen J, Yin Z, Huang Y. Phosphine-Catalyzed Divergent [4+3] Domino Annulations of CF3-Containing Imines with MBH Carbonates: Construction of Perfluoroalkylated Benzazepines. Org Lett 2019; 21:7060-7064. [DOI: 10.1021/acs.orglett.9b02626] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Junlong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhongmo Yin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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44
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An XD, Duan K, Li XJ, Yang JM, Lu YN, Liu Q, Xiao J. Synthesis of Tetrahydro[1,3,4]triazepines via Redox-Neutral α-C(sp3)–H Amination of Cyclic Amines. J Org Chem 2019; 84:11839-11847. [DOI: 10.1021/acs.joc.9b01703] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Xian-Jiang Li
- Shandong Kangqiao Biotechnology Co. Ltd., Binzhou 256500, China
| | | | - Yong-Na Lu
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Qing Liu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
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45
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Li K, Wang L, Yu A, Zhu L, Zhang L, Gu Y, Meng X. Synthesis of Benzothiophene-Fused Oxa[6.6.5]tricyclic Skeletons through a Cinchonidine- or NaOH-Promoted Quadruple Domino Sequence. Chemistry 2019; 25:9665-9669. [PMID: 31066939 DOI: 10.1002/chem.201900890] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Indexed: 12/26/2022]
Abstract
Two base-promoted quadruple domino reactions between thioaurones and allylic phosphonium salts have been developed to synthesize benzothiophene-fused oxa[6.6.5]tricyclic skeletons in moderate to good yields with excellent stereoselectivity and broad functional-group tolerance. This is a simple and useful protocol for the rapid construction of the umbrella-like oxa[6.6.5]tricyclic skeleton.
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Affiliation(s)
- Ke Li
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, P.R. China
| | - Liang Wang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, P.R. China
| | - Aimin Yu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, P.R. China
| | - Lingli Zhu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, P.R. China
| | - Lei Zhang
- Tianjin Engineering Technology Center of Chemical, Wastewater Source Reduction and Recycling, School of Science, Tianjin Chengjian University, Tianjin, 300384, P.R. China
| | - Yingchun Gu
- Tianjin Engineering Technology Center of Chemical, Wastewater Source Reduction and Recycling, School of Science, Tianjin Chengjian University, Tianjin, 300384, P.R. China
| | - Xiangtai Meng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, P.R. China
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46
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He X, Tang Y, Wang Y, Chen J, Xu S, Dou J, Li Y. Phosphine‐Catalyzed Activation of Alkylidenecyclopropanes: Rearrangement to Form Polysubstituted Furans and Dienones. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903320] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xin He
- Department of ChemistrySchool of Science and Xi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Yuhai Tang
- Department of ChemistrySchool of Science and Xi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Yongzhuang Wang
- Department of ChemistrySchool of Science and Xi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Jian‐Bo Chen
- Institute of Chemical MaterialsChina Academy of Engineering Physics Mianyang 621999 P. R. China
| | - Silong Xu
- Department of ChemistrySchool of Science and Xi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Jianwei Dou
- College of PharmacyXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Yang Li
- Department of ChemistrySchool of Science and Xi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an 710049 P. R. China
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47
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He X, Tang Y, Wang Y, Chen J, Xu S, Dou J, Li Y. Phosphine‐Catalyzed Activation of Alkylidenecyclopropanes: Rearrangement to Form Polysubstituted Furans and Dienones. Angew Chem Int Ed Engl 2019; 58:10698-10702. [DOI: 10.1002/anie.201903320] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/28/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Xin He
- Department of ChemistrySchool of Science and Xi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Yuhai Tang
- Department of ChemistrySchool of Science and Xi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Yongzhuang Wang
- Department of ChemistrySchool of Science and Xi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Jian‐Bo Chen
- Institute of Chemical MaterialsChina Academy of Engineering Physics Mianyang 621999 P. R. China
| | - Silong Xu
- Department of ChemistrySchool of Science and Xi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Jianwei Dou
- College of PharmacyXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Yang Li
- Department of ChemistrySchool of Science and Xi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an 710049 P. R. China
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48
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Li X, Yan J, Qin J, Lin S, Chen W, Zhan R, Huang H. Enantioselective Synthesis of Benzofuran-Fused N-Heterocycles via Chiral Squaramide Catalyzed [4 + 2] Cyclization of Azadienes with Azlactones. J Org Chem 2019; 84:8035-8045. [PMID: 31188599 DOI: 10.1021/acs.joc.9b00911] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An asymmetric cyclization reaction of azadienes and azlactones was investigated by employing a Cinchona squaramide catalyst, which could afford a series of benzofuran-fused six-membered heterocycles containing a α,α-disubstituted amino acid unit in a highly diastereoselective (>20:1 dr) and enantioselective (up to 99% ee) manner with good to excellent yields (up to 92%). A plausible pathway was proposed to explain the reaction process.
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Affiliation(s)
- Xiaoping Li
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education , Guangzhou , 510006 , China
| | - Juzhang Yan
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education , Guangzhou , 510006 , China
| | - Jialiang Qin
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education , Guangzhou , 510006 , China
| | - Shilin Lin
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education , Guangzhou , 510006 , China
| | - Weiwen Chen
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education , Guangzhou , 510006 , China
| | - Ruoting Zhan
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education , Guangzhou , 510006 , China
| | - Huicai Huang
- Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Key Laboratory of Chinese Medicinal Resource from Lingnan (Guangzhou University of Chinese Medicine), Ministry of Education , Guangzhou , 510006 , China
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49
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Xie P, Fu W, Wu Y, Cai X, Sun Z, Li S, Gao C, Yang X, Loh TP. Allylic Phosphorus Ylides Directly Generated from Alcohols with Water as the Only Byproduct. Org Lett 2019; 21:4168-4172. [DOI: 10.1021/acs.orglett.9b01349] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Peizhong Xie
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Weishan Fu
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Ying Wu
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Xinying Cai
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Zuolian Sun
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Shuangshuang Li
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Cuiqing Gao
- Co-Innovation Center for the Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing, 210037, China
| | - Xiaobo Yang
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Teck-Peng Loh
- School of Chemistry and Molecular Engineering, Institute of Advanced Synthesis, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, P. R. China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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50
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Wang H, Zhang J, Tu Y, Zhang J. Phosphine‐Catalyzed Enantioselective Dearomative [3+2]‐Cycloaddition of 3‐Nitroindoles and 2‐Nitrobenzofurans. Angew Chem Int Ed Engl 2019; 58:5422-5426. [DOI: 10.1002/anie.201900036] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Indexed: 01/18/2023]
Affiliation(s)
- Huamin Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University Shanghai 200062 P. R. China
| | - Junyou Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University Shanghai 200062 P. R. China
| | - Youshao Tu
- College of Chemistry and Life ScienceAdvanced Institute of Materials ScienceChangchun University of Technology 2055 N. Yan'an Avenue Changchun 130012 P. R. China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal University Shanghai 200062 P. R. China
- Department of ChemistryFudan University 2005 Songhu Road Shanghai 200438 P. R. China
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