1
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Reddy CR, Theja A, Srinivasu E, Subbarao M. Dearomative ipso-Cyclization to Spiropseudoindoxyls: An Extendable Approach To Access Indolo[3,2- c]quinolinones and Isocryptolepine. Org Lett 2024; 26:68-72. [PMID: 38160428 DOI: 10.1021/acs.orglett.3c03643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
A metal-free oxidative intramolecular dearomative spirocyclization of indole-3-formyl-2-carboxamides has been developed for the first time, affording spiropseudoindoxyls in good yields. This domino process proceeds through sequential oxidation, decarboxylation and ipso-arylation. The unique feature of this approach includes the compatibility of N-protected-indole-2-carboxamides. Further, a hitherto unknown rearrangement of spiropseudoindoxyls to indoloquinolones has been achieved. The synthetic utility of this strategy has also been showcased by the construction of a natural alkaloid, isocryptolepine.
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Affiliation(s)
- Chada Raji Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Agnuru Theja
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ejjirotu Srinivasu
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Muppidi Subbarao
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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2
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Zhang M, Chen L, Sun H, Liu Z, Yan SJ, Yu F. Rh(III)-Catalyzed [3 + 2] Annulation/Pinacol Rearrangement Reaction of Enaminones with Iodonium Ylides: Direct Synthesis of 2-Spirocyclo-pyrrol-3-ones. Org Lett 2023; 25:7214-7219. [PMID: 37751319 DOI: 10.1021/acs.orglett.3c02810] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
A novel Rh(III)-catalyzed cascade alkenyl C-H activation/[3 + 2] annulation/pinacol rearrangement reaction of enaminones with iodonium ylides has been developed. This methodology provides a new and straightforward synthetic strategy to afford highly functionalized 2-spirocyclo-pyrrol-3-ones in satisfactory yield from readily available starting materials under mild conditions. Moreover, gram-scale reactions and further derivatization experiments are implemented to demonstrate the potential utility of this developed approach.
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Affiliation(s)
- Mingshuai Zhang
- Faculty of Life Science and Technology, Kunming, University of Science and Technology, Kunming 650500, People's Republic of China
| | - Longkun Chen
- Faculty of Life Science and Technology, Kunming, University of Science and Technology, Kunming 650500, People's Republic of China
| | - Haifeng Sun
- Faculty of Life Science and Technology, Kunming, University of Science and Technology, Kunming 650500, People's Republic of China
| | - Zhuoyuan Liu
- Faculty of Life Science and Technology, Kunming, University of Science and Technology, Kunming 650500, People's Republic of China
| | - Sheng-Jiao Yan
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
| | - Fuchao Yu
- Faculty of Life Science and Technology, Kunming, University of Science and Technology, Kunming 650500, People's Republic of China
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3
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Xie YY, Wang YP, Zhao XJ, Wang AF, Chen ZM, Tu YQ. Oxyallyl cation promoted dearomative semipinacol rearrangement: a facile stereodivergent synthesis of spiro-indolines with contiguous quaternary centers. Chem Commun (Camb) 2021; 57:6632-6635. [PMID: 34124740 DOI: 10.1039/d1cc02033a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A novel oxyallyl cation promoted semipinacol rearrangement of indole-type allylic alcohols was disclosed for the stereodivergent synthesis of spiro-indolines. A variety of spiro-indolines were obtained with moderate to good yields. Three contiguous stereocenters, two of which are vicinal quaternary centers, were effectively formed with good diastereoselectivity. It is worth noting that two diastereoisomers of rearranged products can be readily achieved by easily regulating the reaction conditions. This method may provide an applicable approach for the synthesis of natural indole alkaloids.
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Affiliation(s)
- Yu-Yang Xie
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
| | - Yun-Peng Wang
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
| | - Xiao-Jing Zhao
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
| | - Ai-Fang Wang
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
| | - Zhi-Min Chen
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
| | - Yong-Qiang Tu
- School of Chemistry and Chemical Engineering, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China. and State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China.
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4
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Zhang XW, Zhang H, Wang HC, Zhu MH, Cong H, Liu WB. Pd-catalyzed arylation/aza-Michael addition cascade to C2-spiroindolines and azabicyclo[3.2.2]nonanones. Chem Commun (Camb) 2020; 56:12013-12016. [PMID: 32901620 DOI: 10.1039/d0cc04935b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A palladium-catalyzed arylation/aza-Michael addition cascade reaction of β-substituted cyclic enones and 2-haloanilines has been reported. Using 1 mol% Pd(PPh3)4 as a catalyst, C2-spiroindolines are accessed via an intermolecular vinylogous arylation of β-alkyl cyclic enones and 2-haloanilines followed by an intramolecular aza-Michael addition. The functional group tolerance of this transformation is examined by 18 examples in up to 93% yield. In the second part, we developed an α'-arylation/aza-Michael addition cascade strategy to construct azabicyclo[3.2.2]nonanones catalyzed by Pd(MeCN)2Cl2·PPh3. This study provides a quick route to complex and useful spiro- and bridged-heterocycles from readily available starting materials in good yields with high regioselectivity.
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Affiliation(s)
- Xiao-Wen Zhang
- Sauvage Center for Molecular Sciences, Engineering Research Center of Organosilicon Compounds & Materials (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China.
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5
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Mandal T, Dhara K, Parui N, Dash J. Domino Relay Olefin Metathesis of Triallyl Oxindole and Indole Precursors to Access Cyclic Indoxyls and Carbazoles. ChemCatChem 2020. [DOI: 10.1002/cctc.202000813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Tirtha Mandal
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032 India
| | - Kalyan Dhara
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032 India
| | - Nabin Parui
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032 India
| | - Jyotirmayee Dash
- School of Chemical Sciences Indian Association for the Cultivation of Science Jadavpur, Kolkata 700032 India
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6
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Yan X, Tang YD, Jiang CS, Liu X, Zhang H. Oxidative Dearomative Cross-Dehydrogenative Coupling of Indoles with Diverse C-H Nucleophiles: Efficient Approach to 2,2-Disubstituted Indolin-3-ones. MOLECULES (BASEL, SWITZERLAND) 2020; 25:molecules25020419. [PMID: 31968572 PMCID: PMC7024378 DOI: 10.3390/molecules25020419] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/12/2020] [Accepted: 01/15/2020] [Indexed: 11/16/2022]
Abstract
The oxidative, dearomative cross-dehydrogenative coupling of indoles with various C-H nucleophiles is developed. This process features a broad substrate scope with respect to both indoles and nucleophiles, affording structurally diverse 2,2-disubstituted indolin-3-ones in high yields (up to 99%). The oxidative dimerization and trimerization of indoles has also been demonstrated under the same conditions.
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Affiliation(s)
- Xue Yan
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
| | - Ying-De Tang
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
| | - Cheng-Shi Jiang
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
| | - Xigong Liu
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
- Correspondence: (X.L.); (H.Z.)
| | - Hua Zhang
- School of Biological Science and Technology, University of Jinan, Jinan 250022, China
- Correspondence: (X.L.); (H.Z.)
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7
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Zhang D, Zhang Y, Wu H, Gong L. Organoiodine‐Catalyzed Enantioselective Alkoxylation/Oxidative Rearrangement of Allylic Alcohols. Angew Chem Int Ed Engl 2019; 58:7450-7453. [DOI: 10.1002/anie.201903007] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Indexed: 12/29/2022]
Affiliation(s)
- Dong‐Yang Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Ying Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Hua Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
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8
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Zhang D, Zhang Y, Wu H, Gong L. Organoiodine‐Catalyzed Enantioselective Alkoxylation/Oxidative Rearrangement of Allylic Alcohols. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Dong‐Yang Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Ying Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Hua Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
| | - Liu‐Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale, and Department of ChemistryUniversity of Science and Technology of China Hefei 230026 China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin China
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9
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Pirovano V, Brambilla E, Rizzato S, Abbiati G, Bozzi M, Rossi E. Gold-Catalyzed Cascade Reactions of 4 H-Furo[3,2- b]indoles with Allenamides: Synthesis of Indolin-3-one Derivatives. J Org Chem 2019; 84:5150-5166. [PMID: 30919623 DOI: 10.1021/acs.joc.9b00143] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Merging the ability of cationic gold(I) catalysts to activate unsaturated π-systems with the electrophiles-driven ring-opening reactions of furans, we describe a new approach to synthesize 2-spiroindolin-3-ones from 4 H-furo[3,2- b]indoles. The reaction occurs through a cascade sequence involving addition of a gold-activated allene to the furan moiety of the starting furoindole followed by a ring-opening/ring-closing event affording 2-spirocyclopentane-1,2-dihydro-3 H-indolin-3-ones in moderate to good yields.
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Affiliation(s)
- Valentina Pirovano
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini" , Università degli Studi di Milano , Via Venezian 21 , 20133 Milano , Italy
| | - Elisa Brambilla
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini" , Università degli Studi di Milano , Via Venezian 21 , 20133 Milano , Italy
| | - Silvia Rizzato
- Dipartimento di Chimica , Università degli Studi di Milano , Via Golgi 19 , 20133 Milano , Italy
| | - Giorgio Abbiati
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini" , Università degli Studi di Milano , Via Venezian 21 , 20133 Milano , Italy
| | - Marta Bozzi
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini" , Università degli Studi di Milano , Via Venezian 21 , 20133 Milano , Italy
| | - Elisabetta Rossi
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini" , Università degli Studi di Milano , Via Venezian 21 , 20133 Milano , Italy
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10
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Luo J, Fang Y, Mao X, Yang M, Zhao Y, Liu Y, Chen G, Ji Y. Organocatalytic Asymmetric Cyclization Reaction of 2‐Alkynyl‐3,3‐Difluoro‐3
H
‐Indoles and 2‐Mercaptoimidazoles: Access to
gem
‐Difluorinated C2‐Spiro Indolines. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801524] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jian Luo
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical EngineeringGuangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Yu‐Bo Fang
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical EngineeringGuangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Xiang‐Yu Mao
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical EngineeringGuangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Meng Yang
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical EngineeringGuangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Yu‐Lei Zhao
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong People's Republic of China
| | - Yun‐Lin Liu
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical EngineeringGuangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Guo‐Shu Chen
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical EngineeringGuangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Yong‐Fei Ji
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical EngineeringGuangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
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11
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Liu X, Yan X, Tang Y, Jiang CS, Yu JH, Wang K, Zhang H. Direct oxidative dearomatization of indoles: access to structurally diverse 2,2-disubstituted indolin-3-ones. Chem Commun (Camb) 2019; 55:6535-6538. [DOI: 10.1039/c9cc02956g] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Described is an efficient oxidative dearomatization of indoles with TEMPO oxoammonium salt and a broad range of nucleophiles.
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Affiliation(s)
- Xigong Liu
- School of Biological Science and Technology
- University of Jinan
- Jinan 250022
- P. R. China
| | - Xue Yan
- School of Biological Science and Technology
- University of Jinan
- Jinan 250022
- P. R. China
| | - Yingde Tang
- School of Biological Science and Technology
- University of Jinan
- Jinan 250022
- P. R. China
| | - Cheng-Shi Jiang
- School of Biological Science and Technology
- University of Jinan
- Jinan 250022
- P. R. China
| | - Jin-Hai Yu
- School of Biological Science and Technology
- University of Jinan
- Jinan 250022
- P. R. China
| | - Kaiming Wang
- School of Biological Science and Technology
- University of Jinan
- Jinan 250022
- P. R. China
| | - Hua Zhang
- School of Biological Science and Technology
- University of Jinan
- Jinan 250022
- P. R. China
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12
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Ji Y, He X, Peng C, Huang W. Recent advances in the synthesis of C2-spiropseudoindoxyls. Org Biomol Chem 2019; 17:2850-2864. [DOI: 10.1039/c8ob03122c] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review summarizes the recent development of novel approaches to construct structurally unique oxindoles featuring a spirocycle at the C2 position.
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Affiliation(s)
- Yanling Ji
- State Key Laboratory of Southwestern Chinese Medicine Resources
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- People's Republic of China
| | - Xianghong He
- State Key Laboratory of Southwestern Chinese Medicine Resources
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- People's Republic of China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- People's Republic of China
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine
| | - Wei Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
- People's Republic of China
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13
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Mao XY, Lin XT, Yang M, Chen GS, Liu YL. Organocatalytic Synthesis of gem
-Difluorinated C2-Spiro Indolines and Pyrimido[1,2-a
]benzimidazoles from 2-Alkynyl-3,3-Difluoro-3H
-Indoles. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800716] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xiang-Yu Mao
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering; Guangzhou University; 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Xiao-Tong Lin
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering; Guangzhou University; 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Meng Yang
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering; Guangzhou University; 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Guo-Shu Chen
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering; Guangzhou University; 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Yun-Lin Liu
- Guangzhou Key Laboratory for Environmentally Functional Materials and Technology, School of Chemistry and Chemical Engineering; Guangzhou University; 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
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14
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Tang X, Zhu HP, Zhou J, Chen Y, Pan XL, Guo L, Li JL, Peng C, Huang W. Highly diastereoselective synthesis of cyclopropane-fused spiro-pseudoindoxyl derivatives through [2 + 1] annulation of 2-ylideneoxindoles and sulfonium bromides. Org Biomol Chem 2018; 16:8169-8174. [DOI: 10.1039/c8ob02034e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We developed an efficient method for diastereoselective synthesis of cyclopropane-fused spiropseudoindoxyl derivatives through [2 + 1] annulation.
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Affiliation(s)
- Xue Tang
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
| | - Hong-Ping Zhu
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
| | - Jin Zhou
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
| | - Yang Chen
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
| | - Xiao-Li Pan
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
| | - Li Guo
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
| | - Jun-Long Li
- Sichuan Industrial Institute of Antibiotics
- Chengdu University
- Chengdu 610052
- China
| | - Cheng Peng
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
| | - Wei Huang
- State Key Laboratory Breeding Base of Systematic Research
- Development and Utilization of Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu 611137
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15
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Zhao YL, Tang YQ, Fei XH, Xiao T, Lu YD, Fu XZ, He B, Zhou M, Li C, Xu PF, Yang YY. Palladium-catalyzed direct C(sp3)–H arylation of indole-3-ones with aryl halides: a novel and efficient method for the synthesis of nucleophilic 2-monoarylated indole-3-ones. RSC Adv 2018; 8:25292-25297. [PMID: 35539771 PMCID: PMC9082533 DOI: 10.1039/c8ra04807j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 07/09/2018] [Indexed: 12/25/2022] Open
Abstract
A novel and efficient method for the synthesis of nucleophilic 2-monoarylated indole-3-ones via palladium-catalyzed direct C(sp3)–H arylation of indole-3-ones with aryl halides has been developed.
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16
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Ganesh M, Rao MP, Mirajakar SJ. Part I: Diastereoselective Reactions Involving β-Mono- and β,β′-Disubstituted Alkylidene Oxindoles: Pondering Alkene Geometry. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700410] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Madhu Ganesh
- Department of Chemistry, P.O. Box 1908, B.M.S.; College of Engineering; Bull Temple Road Bengaluru 560019 India
| | - Madhuri P. Rao
- Department of Chemistry, P.O. Box 1908, B.M.S.; College of Engineering; Bull Temple Road Bengaluru 560019 India
| | - Shruti J. Mirajakar
- Department of Chemistry, P.O. Box 1908, B.M.S.; College of Engineering; Bull Temple Road Bengaluru 560019 India
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17
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Wu H, Wang Q, Zhu J. Copper-Catalyzed Enantioselective Domino Arylation/Semipinacol Rearrangement of Allylic Alcohols with Diaryliodonium Salts. Chemistry 2017; 23:13037-13041. [DOI: 10.1002/chem.201703563] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Indexed: 12/15/2022]
Affiliation(s)
- Hua Wu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304; 1015 Lausanne Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304; 1015 Lausanne Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304; 1015 Lausanne Switzerland
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18
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Wu H, Wang Q, Zhu J. Organocatalytic Enantioselective Acyloin Rearrangement of α-Hydroxy Acetals to α-Alkoxy Ketones. Angew Chem Int Ed Engl 2017; 56:5858-5861. [PMID: 28436195 DOI: 10.1002/anie.201701098] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/22/2017] [Indexed: 12/27/2022]
Abstract
We report an unprecedented organocatalytic enantioselective acyloin rearrangement of α,α-disubstituted α-hydroxy acetals. In the presence of a catalytic amount of chiral binol-derived N-triflyl phosphoramide, α-hydroxy acetals rearranged to α-alkoxy ketones in good to high yields with high enantioselectivities. Formation of an ion pair between the in situ generated oxocarbenium ion and the chiral phosphoramide anion was proposed to be responsible for the highly efficient transfer of chirality. Conditions for removal of cyclohexyl and cyclopentyl groups from the corresponding α-alkoxy ketones were uncovered underpinning their potential general utility as hydroxy protecting groups. Conversion of the rearranged products to the enantioenriched α-hydroxy ketone, 1,2-diol, β-amino alcohol and 1,4-dioxane was also documented.
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Affiliation(s)
- Hua Wu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
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19
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Wu H, Wang Q, Zhu J. Organocatalytic Enantioselective Acyloin Rearrangement of α-Hydroxy Acetals to α-Alkoxy Ketones. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701098] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hua Wu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Fédérale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Fédérale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering; Ecole Polytechnique Fédérale de Lausanne; EPFL-SB-ISIC-LSPN, BCH 5304 1015 Lausanne Switzerland
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20
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Li YJ, Yan N, Liu CH, Yu Y, Zhao YL. Gold/Copper-Co-catalyzed Tandem Reactions of 2-Alkynylanilines: A Synthetic Strategy for the C2-Quaternary Indolin-3-ones. Org Lett 2017; 19:1160-1163. [DOI: 10.1021/acs.orglett.7b00200] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yi-Jin Li
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Na Yan
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Chun-Hua Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yang Yu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yu-Long Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
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21
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Shao Y, Zeng YM, Ji JY, Sun XQ, Yang HT, Miao CB. The Cs2CO3–Catalyzed Reaction of 2-Oxindoles with Enones for the Preparation of Indolin-3-Ones and Their Further Transformation. J Org Chem 2016; 81:12443-12450. [DOI: 10.1021/acs.joc.6b01993] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ying Shao
- Jiangsu Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Yu-Mei Zeng
- Jiangsu Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Jie-Ying Ji
- Jiangsu Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Xiao-Qiang Sun
- Jiangsu Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Hai-Tao Yang
- Jiangsu Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
| | - Chun-Bao Miao
- Jiangsu Key Laboratory of
Advanced Catalytic Materials and Technology, Advanced Catalysis and
Green Manufacturing Collaborative Innovation Center, School of Petrochemical
Engineering, Changzhou University, Changzhou 213164, China
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22
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Kong L, Wang M, Zhang F, Xu M, Li Y. Copper-Catalyzed Oxidative Dearomatization/Spirocyclization of Indole-2-Carboxamides: Synthesis of 2-Spiro-pseudoindoxyls. Org Lett 2016; 18:6124-6127. [DOI: 10.1021/acs.orglett.6b03131] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lingkai Kong
- Shanghai Key Laboratory of
Green Chemistry and Chemical Processes, School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Mengdan Wang
- Shanghai Key Laboratory of
Green Chemistry and Chemical Processes, School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Fangfang Zhang
- Shanghai Key Laboratory of
Green Chemistry and Chemical Processes, School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Murong Xu
- Shanghai Key Laboratory of
Green Chemistry and Chemical Processes, School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Yanzhong Li
- Shanghai Key Laboratory of
Green Chemistry and Chemical Processes, School of Chemistry and Molecular
Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
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23
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Wu H, Wang Q, Zhu J. Organocatalytic Enantioselective Vinylogous Pinacol Rearrangement Enabled by Chiral Ion Pairing. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609911] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Hua Wu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304; 1015 Lausanne Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304; 1015 Lausanne Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304; 1015 Lausanne Switzerland
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24
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Srivastava A, Patel SS, Chandna N, Jain N. Copper-Catalyzed anti-Markovnikov Hydroindolation of Terminal Alkynes: Regioselective Synthesis of Bis(indolyl)alkanes. J Org Chem 2016; 81:11664-11670. [DOI: 10.1021/acs.joc.6b02058] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ananya Srivastava
- Department
of Chemistry, Indian Institute of Technology, Delhi 110016, India
| | - Shyam Sunder Patel
- Department
of Chemistry, Indian Institute of Technology, Delhi 110016, India
| | - Nisha Chandna
- Department
of Chemistry, Indian Institute of Technology, Delhi 110016, India
| | - Nidhi Jain
- Department
of Chemistry, Indian Institute of Technology, Delhi 110016, India
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25
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Wu H, Wang Q, Zhu J. Organocatalytic Enantioselective Vinylogous Pinacol Rearrangement Enabled by Chiral Ion Pairing. Angew Chem Int Ed Engl 2016; 55:15411-15414. [DOI: 10.1002/anie.201609911] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Indexed: 01/28/2023]
Affiliation(s)
- Hua Wu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304; 1015 Lausanne Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304; 1015 Lausanne Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products; Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304; 1015 Lausanne Switzerland
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26
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Guchhait SK, Chaudhary V, Rana VA, Priyadarshani G, Kandekar S, Kashyap M. Oxidative Dearomatization of Indoles via Pd-Catalyzed C–H Oxygenation: An Entry to C2-Quaternary Indolin-3-ones. Org Lett 2016; 18:1534-7. [DOI: 10.1021/acs.orglett.6b00244] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sankar K. Guchhait
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector
67, SAS Nagar (Mohali), Punjab 160062, India
| | - Vikas Chaudhary
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector
67, SAS Nagar (Mohali), Punjab 160062, India
| | - Vijay A. Rana
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector
67, SAS Nagar (Mohali), Punjab 160062, India
| | - Garima Priyadarshani
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector
67, SAS Nagar (Mohali), Punjab 160062, India
| | - Somnath Kandekar
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector
67, SAS Nagar (Mohali), Punjab 160062, India
| | - Maneesh Kashyap
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER), Sector
67, SAS Nagar (Mohali), Punjab 160062, India
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27
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Zhang LJ, Wang Y, Hu XQ, Xu PF. Hydrogen-Bonding Network Promoted [3+2] Cycloaddition: Asymmetric Catalytic Construction of Spiro-pseudoindoxyl Derivatives. Chem Asian J 2016; 11:834-8. [DOI: 10.1002/asia.201600013] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Liang-Jie Zhang
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 China
| | - Yao Wang
- School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 China
| | - Xiu-Qin Hu
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 China
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 China
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28
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Oxidative photochemical cyclization of ethyl 3-(indol-3-yl)-3-oxo-2-phenylpropanoate derivatives: synthesis of benzo[a]carbazoles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.03.107] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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29
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Peng JB, Qi Y, Jing ZR, Wang SH, Tu YQ, Zhu DY, Zhang FM. Efficient Oxa-Diels–Alder/Semipinacol Rearrangement/Aldol Cascade Reaction: Short Approach to Polycyclic Architectures. Org Lett 2015; 17:1014-7. [DOI: 10.1021/acs.orglett.5b00125] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jin-Bao Peng
- A State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yue Qi
- A State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Ze-Ran Jing
- A State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Shao-Hua Wang
- A State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yong-Qiang Tu
- A State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Dao-Yong Zhu
- A State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Fu-Min Zhang
- A State Key Laboratory of Applied Organic Chemistry & College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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30
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Marien N, Brigou B, Pinter B, De Proft F, Verniest G. Synthesis of 2-Spiropseudoindoxyls via an Intramolecular Nitroalkyne Redox–Dipolar Cycloaddition Cascade. Org Lett 2014; 17:270-3. [DOI: 10.1021/ol503364w] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Niels Marien
- Research
Group of Organic Chemistry, Department of Chemistry and Department
of Bio-Engineering Sciences, Faculty of Science and Bio-Engineering
Sciences, and ‡Research Group of General Chemistry, Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | | | | | | | - Guido Verniest
- Research
Group of Organic Chemistry, Department of Chemistry and Department
of Bio-Engineering Sciences, Faculty of Science and Bio-Engineering
Sciences, and ‡Research Group of General Chemistry, Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
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31
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Guo C, Schedler M, Daniliuc CG, Glorius F. N-Heterocyclic Carbene Catalyzed Formal [3+2] Annulation Reaction of Enals: An Efficient Enantioselective Access to Spiro-Heterocycles. Angew Chem Int Ed Engl 2014; 53:10232-6. [DOI: 10.1002/anie.201405381] [Citation(s) in RCA: 158] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Indexed: 11/12/2022]
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32
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Guo C, Schedler M, Daniliuc CG, Glorius F. Durch N-heterocyclische Carbene katalysierte formale [3+2]-Anellierungen von Enalen: enantioselektiver Zugang zu Spiroheterocyclen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405381] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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33
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Patel P, Narendraprasad Reddy B, Ramana C. The synthesis of the central tricyclic core of the isatisine A: harmonious orchestration of [metal]-catalyzed reactions in a sequence. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.11.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Vandavasi JK, Kuo KK, Hu WP, Shen HC, Lo WS, Wang JJ. A convenient method to construct (Z)-oxazines via 6-exo-dig iodocyclization and synthesis of indolin-3-one. Org Biomol Chem 2013; 11:6520-5. [DOI: 10.1039/c3ob41272e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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