1
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Miller BA, Narangoda CJ, Kwain S, Bridges WT, Noori M, Solomon EE, Bragg AA, Sung AT, Iwai Y, Ulisse L, Schmidt WH, McMillen CD, Dominy BN, Whitehead DC. Cycloaddition of Phenyltriazolinedione with Carbazole-Alkynes and Yne-Carbamates to Access Diazacyclobutenes. J Org Chem 2024; 89:4990-4999. [PMID: 38494854 DOI: 10.1021/acs.joc.4c00213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
Previously, we described the synthesis of stable, bicyclic examples of the rather rare diazacyclobutene (DCB) motif by means of a cycloaddition between triazolinediones and electron-rich thiolated alkynes. Here, we report the investigation of the cycloaddition of triazolinediones with related electron-rich yne-carbamates and carbazole-alkynes. Bicyclic DCBs arising from yne-carbamates were isolated in 8-65% yield, while those arising from carbazole-alkynes were isolated in 28-59% yield. Mechanistic studies and characterization of isolable byproducts shed light on the underlying issues leading to poor to moderate yields.
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Affiliation(s)
- Brock A Miller
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
- Department of Chemistry, High Point University, High Point, North Carolina 27268, United States
| | - Chandima J Narangoda
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Gangodawila, Nugegodo 10250, Sri Lanka
| | - Samuel Kwain
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
| | - William T Bridges
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
| | - Monireh Noori
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
| | - Erin E Solomon
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
| | - Alexis A Bragg
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
| | - Alex T Sung
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
| | - Yusuke Iwai
- Creative Engineering Program, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
| | - Lauren Ulisse
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
| | - William H Schmidt
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
| | - Colin D McMillen
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
| | - Brian N Dominy
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
| | - Daniel C Whitehead
- Department of Chemistry, Clemson University, Clemson, South Carolina 29631, United States
- Eukaryotic Pathogens Innovation Center, Clemson University, Clemson, South Carolina 29634, United States
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2
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Badeji AA, Liu Y, Oladipo SD, Osinubi AD. Computational insights into the mechanisms and origins of switchable selectivity in gold(i)-catalyzed annulation of ynamides with isoxazoles via 6π-electrocyclizations of azaheptatrienyl cations. RSC Adv 2023; 13:18025-18037. [PMID: 37323448 PMCID: PMC10265590 DOI: 10.1039/d3ra02839a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 06/05/2023] [Indexed: 06/17/2023] Open
Abstract
Electrocyclizations of acyclic conjugated π-motifs have emerged as a versatile and effective strategy for accessing various ring systems with excellent functional group tolerability and controllable selectivity. Typically, the realization of 6π-electrocyclization of heptatrienyl cations to afford seven-membered motif has proven difficult due to the high-energy state of the cyclizing seven-membered intermediate. Instead, it undergoes the Nazarov cyclization, affording a five-membered pyrrole product. However, the incorporation of a Au(i)-catalyst, a nitrogen atom and tosylamide group in the heptatrienyl cations unexpectedly circumvented the aforementioned high energy state to afford a seven-membered azepine product via 6π-electrocyclization in the annulation of 3-en-1-ynamides with isoxazoles. Therefore, extensive computational studies were carried out to investigate the mechanism of Au(i)-catalyzed [4+3] annulation of 3-en-1-ynamides with dimethylisoxazoles to produce a seven-membered 4H-azepine via the 6π-electrocyclization of azaheptatrienyl cations. Computational results showed that after the formation of the key α-imino gold carbene intermediate, the annulation of 3-en-1-ynamides with dimethylisoxazole occurs via the unusual 6π-electrocyclization to afford a seven-membered 4H-azepine exclusively. However, the annulation of 3-cyclohexen-1-ynamides with dimethylisoxazole occurs via the commonly proposed aza-Nazarov cyclization pathway to majorly generate five-membered pyrrole derivatives. The results from the DFT predictive analysis revealed that the key factors responsible for the different chemo-, and regio-selectivities observed are the cooperating effect of the tosylamide group on C1, the uninterrupted π-conjugation pattern of the α-imino gold(i) carbene and the substitution pattern at the cyclization termini. The Au(i)-catalyst is believed to assist in the stabilization of the azaheptatrienyl cation.
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Affiliation(s)
| | - Yuan Liu
- School of Chemistry and Chemical Engineering, Nantong University 9 Seyuan Road Nantong 226019 China
| | - Segun D Oladipo
- Department of Chemical Sciences, Olabisi Onabanjo University 2002 Ago-Iwoye Nigeria
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3
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Iftikhar R, Mazhar A, Iqbal MS, Khan FZ, Askary SH, Sibtain H. Ring forming transformations of ynamides via cycloaddition. RSC Adv 2023; 13:10715-10756. [PMID: 37025669 PMCID: PMC10072253 DOI: 10.1039/d3ra00139c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 03/29/2023] [Indexed: 04/07/2023] Open
Abstract
Ynamides are N-alkyne compounds bearing an electron withdrawing group at the nitrogen atom. They offer unique pathways for the construction of versatile building blocks owing to their exceptional balance between reactivity and stability. Recently several studies have been reported that explore and illustrate the synthetic potential of ynamides and ynamide-derived advanced intermediates in cycloadditions with different reaction partners to yield heterocyclic cycloadducts of synthetic and pharmaceutical value. Cycloaddition reactions of ynamides are the facile and preferable routes for the construction of structural motifs having striking importance in synthetic, medicinal chemistry, and advanced materials. In this systematic review, we highlighted the recently reported novel transformations and synthetic applications that involved the cycloaddition reaction of ynamides. The scope along with the limitations of the transformations are discussed in detail. Synthetic potential of ynamides and ynamide-derived advanced intermediates in cycloaddition reactions with different reaction partners to yield versatile heterocyclic adducts.![]()
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Affiliation(s)
- Ramsha Iftikhar
- Department of Chemistry, Government College University Faisalabad38000-FaisalabadPakistan
| | - Aqsa Mazhar
- Faculty of Health and Medicine, University of New South Wales2033-SydneyAustralia
| | - Muhammad Saqlain Iqbal
- Department of Electrical Information Engineering, Polytechnic University of Bari70126-BariItaly
| | - Faiza Zahid Khan
- Institute of Chemistry, RheinischeFriedrich-Wilhelms-Universität BonnBonnGermany
| | - Syed Hassan Askary
- Department of Chemistry, University of Management and Technology54770-LahorePakistan
| | - Hifza Sibtain
- Department of Chemistry, University of Management and Technology54770-LahorePakistan
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4
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Fang R, Liu K, Kirillov AM, Yang L. DFT Rationalization of Gold(I)-Catalyzed Couplings between Alkynyl Thioether and Nitrenoid Derivatives: Mechanism, Selectivity Patterns, and Effects of Substituents. J Org Chem 2022; 87:7193-7201. [PMID: 35579210 DOI: 10.1021/acs.joc.2c00407] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The present work focuses on a theoretical investigation of mechanistic features, chemoselectivity, regioselectivity, and effect of substituents in the gold-catalyzed reactions of alkynyl thioethers and isoxazoles. The DFT calculations reveal that the nucleophilic attack of isoxazole to a β-position of catalyst-bound ynamide forms a vinyl intermediate. This undergoes cleavage of the N-O isoxazole bond and isomerizes to form an α-imino α'-sulfenyl gold carbene complex with stabilization of the Au-S interaction. For 3,5-dimethylisoxazole, the reaction follows a formal [3 + 2] cycloaddition pathway and a 1,3-H migration to give the pyrrole products. Replacement of 3,5-dimethylisoxazole by 3,5-dimethyl-4-phenylisoxazole leads to the formation of deacylative annulation products and desulfenylated 3-acylated pyrroles. Reactions with 4-methyl-3,5-diphenylisoxazoles induce the formation of N-acylated pyrroles and desulfenylated 3-acylated pyrroles. For the minor pathway, the α-addition and 1,2-S migration result in sulfur-substituted β-keto enamide derivatives. In addition, the unique features of regio- and chemoselectivity were rationalized by the distortion and interaction analysis. Apart from fully rationalizing the experimental results, the theoretical DFT data give an important support for comprehending related types of reaction mechanisms.
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Affiliation(s)
- Ran Fang
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China
| | - Kunyang Liu
- Key Laboratory of Chemical Additives for China National Light Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China
| | - Alexander M Kirillov
- Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisbon 1049-001, Portugal
| | - Lizi Yang
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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5
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Zhang C, Zhang XQ, Nie Y, Wang C, Xu T, Zhang J, Bai L, Feng C, Wang Y. Gold-catalyzed formal (3 + 2) and (4 + 2) cycloaddition reactions using propiolates: assembly of 2,3-dihydrofurans and 3,4-dihydropyrans via a multistep cascade process. Org Chem Front 2022. [DOI: 10.1039/d2qo01084d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A gold-catalyzed formal dipolar cycloaddition reaction was developed using polarized alkynes as dipolarophiles and butenediol or pentenediol derivatives as formal dipoles. Silyl groups were used to solve the selectivity issue of unsymmetrical diols.
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Affiliation(s)
- Congdi Zhang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Xiao-Qian Zhang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Yu Nie
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Chao Wang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Tianyi Xu
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Junjie Zhang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Lu Bai
- Instrumental Analysis Center, Xi'an Jiaotong University, No.28, West Xianning Road, Xi'an, Shaanxi, 710049, P.R. China
| | - Chao Feng
- Instrumental Analysis Center, Xi'an Jiaotong University, No.28, West Xianning Road, Xi'an, Shaanxi, 710049, P.R. China
| | - Youliang Wang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
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6
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Qi LJ, Shi CY, Chen PF, Li L, Fang G, Qian PC, Deng C, Zhou JM, Ye LW. Gold-Catalyzed 1,1-Carboalkoxylation of Oxetane-Ynamides via Exocyclic Metal Carbenes: Divergent and Atom-Economical Synthesis of Tricyclic N-Heterocycles. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00461] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Lin-Jun Qi
- Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Chong-Yang Shi
- Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Peng-Fei Chen
- Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Long Li
- Institute of New Materials & Industry Technology, College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Gang Fang
- Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Peng-Cheng Qian
- Institute of New Materials & Industry Technology, College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jin-Mei Zhou
- Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Long-Wu Ye
- Key Laboratory for Chemical Biology of Fujian Province, State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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7
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Hu YC, Zhao Y, Wan B, Chen QA. Reactivity of ynamides in catalytic intermolecular annulations. Chem Soc Rev 2021; 50:2582-2625. [PMID: 33367365 DOI: 10.1039/d0cs00283f] [Citation(s) in RCA: 82] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Ynamides are unique alkynes with a carbon-carbon triple bond directly attached to the nitrogen atom bearing an electron-withdrawing group. The alkyne is strongly polarized by the electron-donating nitrogen atom, but its high reactivity can be finely tempered by the electron-withdrawing group. Accordingly, ynamides are endowed with both nucleophilic and electrophilic properties and their chemistry has been an active research field. The catalytic intermolecular annulations of ynamides, featuring divergent assembly of structurally important amino-heterocycles in a regioselective manner, have gained much attention over the past decade. This review aims to provide a comprehensive summary of the advances achieved in this area involving transition metal and acid catalysis. Moreover, the intermolecular annulations of ynamide analogs including ynol ethers and thioalkynes are also discussed, which can provide insights into the reactivity difference caused by the heteroatoms.
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Affiliation(s)
- Yan-Cheng Hu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
| | - Yingying Zhao
- School of Chemistry and Chemical Engineering, Liaoning Normal University, 850 Huanghe Road, Dalian 116029, China
| | - Boshun Wan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.
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8
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Campeau D, León Rayo DF, Mansour A, Muratov K, Gagosz F. Gold-Catalyzed Reactions of Specially Activated Alkynes, Allenes, and Alkenes. Chem Rev 2020; 121:8756-8867. [DOI: 10.1021/acs.chemrev.0c00788] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Dominic Campeau
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - David F. León Rayo
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Ali Mansour
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Karim Muratov
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Fabien Gagosz
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
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9
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Li D, Zang W, Bird MJ, Hyland CJT, Shi M. Gold-Catalyzed Conversion of Highly Strained Compounds. Chem Rev 2020; 121:8685-8755. [DOI: 10.1021/acs.chemrev.0c00624] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Deyao Li
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 China
| | - Wenqing Zang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 China
| | - Melissa J. Bird
- School of Chemistry and Molecular Bioscience, Molecular Horizons Research Institute, University of Wollongong,Wollongong New South Wales 2500, Australia
| | - Christopher J. T. Hyland
- School of Chemistry and Molecular Bioscience, Molecular Horizons Research Institute, University of Wollongong,Wollongong New South Wales 2500, Australia
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 China
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10
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Catalytic Regioselective Isomerization of 2,2‐Disubstituted Oxetanes to Homoallylic Alcohols. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Cabré A, Rafael S, Sciortino G, Ujaque G, Verdaguer X, Lledós A, Riera A. Catalytic Regioselective Isomerization of 2,2-Disubstituted Oxetanes to Homoallylic Alcohols. Angew Chem Int Ed Engl 2020; 59:7521-7527. [PMID: 31981390 DOI: 10.1002/anie.201915772] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/24/2020] [Indexed: 12/27/2022]
Abstract
The selective isomerization of strained heterocyclic compounds is an important tool in organic synthesis. An unprecedented regioselective isomerization of 2,2-disubstituted oxetanes into homoallylic alcohols is described. The use of tris(pentafluorophenyl)borane (B(C6 F5 )3 ), a commercially available Lewis acid was key to obtaining good yields and selectivities since other Lewis acids afforded mixtures of isomers and substantial polymerization. The reaction took place under exceptionally mild reaction conditions and very low catalyst loading (0.5 mol %). DFT calculations disclose the mechanistic features of the isomerization and account for the high selectivity displayed by the B(C6 F5 )3 catalyst. The synthetic applicability of the new reaction is demonstrated by the preparation of γ-chiral alcohols using iridium-catalyzed asymmetric hydrogenation.
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Affiliation(s)
- Albert Cabré
- Institute of Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac 10, 08028, Barcelona, Spain.,Departament de Química Inorgànica i Orgànica, Secció Orgànica, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain
| | - Sergi Rafael
- Departament de Química Inorgànica i Orgànica, Secció Orgànica, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain
| | - Giuseppe Sciortino
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain.,Dipartimento di Chimica e Farmacia, Università di Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - Gregori Ujaque
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Xavier Verdaguer
- Institute of Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac 10, 08028, Barcelona, Spain.,Departament de Química Inorgànica i Orgànica, Secció Orgànica, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain
| | - Agustí Lledós
- Departament de Química, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Antoni Riera
- Institute of Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac 10, 08028, Barcelona, Spain.,Departament de Química Inorgànica i Orgànica, Secció Orgànica, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain
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12
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Zhou L, Yang L, Dai S, Gao Y, Fang R, Kirillov AM, Yang L. Insight into the reaction mechanism and chemoselectivity in the cycloaddition of ynamides and isoxazoles with H2O. Catal Sci Technol 2020. [DOI: 10.1039/c9cy01964b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism and chemoselectivity in the cycloaddition of ynamides and isoxazoles have been explored by the density functional theory (DFT) in model systems composed of a Brønsted acid (HNTf2), gold(i) [IPrAuNTf2] or platinum(ii) (PtCl2/CO) catalyst.
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Affiliation(s)
- Lin Zhou
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Li Yang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Songshan Dai
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Yuanyuan Gao
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Ran Fang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Alexander M. Kirillov
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- Lisbon
- Portugal
| | - Lizi Yang
- State Key Laboratory of Applied Organic Chemistry and Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province
- College of Chemistry and Chemical Engineering
- Lanzhou University
- Lanzhou 730000
- P. R. China
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13
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Aoyagi N, Endo T. Synthesis and cationic ring‐opening polymerization of oxetane monomer containing five‐membered cyclic carbonate moiety via highly chemoselective addition of CO
2. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/pola.29541] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Naoto Aoyagi
- Molecular Engineering Institute Kindai University, 11‐6 Kayanomori, Iizuka Fukuoka 820‐8555 Japan
| | - Takeshi Endo
- Molecular Engineering Institute Kindai University, 11‐6 Kayanomori, Iizuka Fukuoka 820‐8555 Japan
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14
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Li L, Zhu XQ, Zhang YQ, Bu HZ, Yuan P, Chen J, Su J, Deng X, Ye LW. Metal-free alkene carbooxygenation following tandem intramolecular alkoxylation/Claisen rearrangement: stereocontrolled access to bridged [4.2.1] lactones. Chem Sci 2019; 10:3123-3129. [PMID: 30996895 PMCID: PMC6429610 DOI: 10.1039/c9sc00079h] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 01/23/2019] [Indexed: 12/14/2022] Open
Abstract
Alkene carbooxygenation has attracted considerable attention over the past few decades as this approach provides an efficient access to various oxygen-containing molecules, especially the valuable O-heterocycles. However, examples of catalytic alkene carbooxygenation via a direct C-O cleavage are quite scarce, and the C-O cleavage in these cases is invariably initiated by transition metal-catalyzed oxidative addition. We report here a novel Brønsted acid-catalyzed intramolecular alkoxylation-initiated tandem sequence, which represents the first metal-free intramolecular alkoxylation/Claisen rearrangement. Significantly, an unprecedented Brønsted acid-catalyzed intramolecular alkene insertion into the C-O bond via a carbocation pathway was discovered. This method allows the stereocontrolled synthesis of valuable indole-fused bridged [4.2.1] lactones, providing ready access to biologically relevant scaffolds in a single synthetic step from an acyclic precursor. Moreover, such an asymmetric cascade cyclization has also been realized by employing a traceless chiral directing group. Control experiments favor the feasibility of a carbocation pathway for the process. In addition, biological tests showed that some of these newly synthesized indole-fused lactones exhibited their bioactivity as antitumor agents against different breast cancer cells, melanoma cells, and esophageal cancer cells.
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Affiliation(s)
- Long Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces , Key Laboratory for Chemical Biology of Fujian Province , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Xin-Qi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces , Key Laboratory for Chemical Biology of Fujian Province , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Ying-Qi Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces , Key Laboratory for Chemical Biology of Fujian Province , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Hao-Zhen Bu
- State Key Laboratory of Physical Chemistry of Solid Surfaces , Key Laboratory for Chemical Biology of Fujian Province , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Peng Yuan
- State Key Laboratory of Physical Chemistry of Solid Surfaces , Key Laboratory for Chemical Biology of Fujian Province , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
| | - Jinyu Chen
- State Key Laboratory of Cellular Stress Biology , School of Life Sciences , Xiamen University , Xiamen , Fujian 361102 , China
| | - Jingyi Su
- State Key Laboratory of Cellular Stress Biology , School of Life Sciences , Xiamen University , Xiamen , Fujian 361102 , China
| | - Xianming Deng
- State Key Laboratory of Cellular Stress Biology , School of Life Sciences , Xiamen University , Xiamen , Fujian 361102 , China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces , Key Laboratory for Chemical Biology of Fujian Province , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China .
- State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry , Chinese Academy of Sciences , Shanghai 200032 , China
- State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin 300071 , China
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15
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Pang Y, Liang G, Xie F, Hu H, Du C, Zhang X, Cheng M, Lin B, Liu Y. N-Fluorobenzenesulfonimide as a highly effective Ag(i)-catalyst attenuator for tryptamine-derived ynesulfonamide cycloisomerization. Org Biomol Chem 2019; 17:2247-2257. [DOI: 10.1039/c9ob00059c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
N-Fluorobenzenesulfonimide was identified for the first time as a unique Ag(i)-catalyst attenuator in the annulation of a tryptamine-derived ynesulfonamide to an azepino[4,5-b]indole.
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Affiliation(s)
- Yadong Pang
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Guoduan Liang
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Fukai Xie
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Haibin Hu
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Chuan Du
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Xinhang Zhang
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Maosheng Cheng
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Bin Lin
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
| | - Yongxiang Liu
- Key Laboratory of Structure-Based Drug Design and Discovery Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- P. R. China
- Institute of Drug Research in Medicine Capital of China
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16
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Nguyen TN, May JA. Branched Amine Synthesis via Aziridine or Azetidine Opening with Organotrifluoroborates by Cooperative Brønsted/Lewis Acid Catalysis: An Acid-Dependent Divergent Mechanism. Org Lett 2018; 20:3618-3621. [PMID: 29874082 DOI: 10.1021/acs.orglett.8b01394] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A practical catalytic method to synthesize β,β- and γ,γ-substituted amines by opening aziridines and azetidines, respectively, using alkenyl, alkynyl, or aryl/heteroaryl trifluoroborate salts is described. This reaction features simple open-flask reaction conditions, the use of transition-metal-free catalysis, complete regioselectivity, and high diastereoselectivity. Preliminary mechanistic studies suggest that carbocation formation is disfavored. Stereoretentive addition is favored with Brønsted acid present, while stereoinversion is favored in its absence, indicating divergent mechanisms.
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Affiliation(s)
- Truong N Nguyen
- Department of Chemistry , University of Houston , 3585 Cullen Boulevard, Fleming Building Room 112 , Houston , Texas 77204-5003 , United States
| | - Jeremy A May
- Department of Chemistry , University of Houston , 3585 Cullen Boulevard, Fleming Building Room 112 , Houston , Texas 77204-5003 , United States
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17
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Zhao Y, Wang C, Hu Y, Wan B. Brønsted acid-catalyzed formal [5+2+1] cycloaddition of ynamides and isoxazoles with water: access to oxygen-bridged tetrahydro-1,4-oxazepines. Chem Commun (Camb) 2018; 54:3963-3966. [DOI: 10.1039/c8cc00881g] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The unique property of the Brønsted acid, as well as introducing a small amount of water, shows distinct chemoselectivity from the corresponding gold-catalyzed cycloadditions.
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Affiliation(s)
- Yingying Zhao
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
- University of Chinese Academy of Sciences
| | - Chunxiang Wang
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Yancheng Hu
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Boshun Wan
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
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18
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Duret G, Le Fouler V, Bisseret P, Bizet V, Blanchard N. Diels-Alder and Formal Diels-Alder Cycloaddition Reactions of Ynamines and Ynamides. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700986] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Guillaume Duret
- CNRS, LCM UMR 7509; Université de Strasbourg; 67000 Strasbourg France
| | - Vincent Le Fouler
- CNRS, LCM UMR 7509; Université de Strasbourg; 67000 Strasbourg France
| | - Philippe Bisseret
- CNRS, LCM UMR 7509; Université de Strasbourg; 67000 Strasbourg France
| | - Vincent Bizet
- CNRS, LCM UMR 7509; Université de Strasbourg; 67000 Strasbourg France
| | - Nicolas Blanchard
- CNRS, LCM UMR 7509; Université de Strasbourg; 67000 Strasbourg France
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19
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Egger L, Guénée L, Bürgi T, Lacour J. Regioselective and Enantiospecific Synthesis of Dioxepines by (Cyclopentadienyl)ruthenium-Catalyzed Condensations of Diazocarbonyls and Oxetanes. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700638] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Léo Egger
- Department of Organic Chemistry; University of Geneva; Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Laure Guénée
- Laboratory of Crystallography; University of Geneva; Quai Ernest Ansermet 24 1211 Geneva 4 Switzerland
| | - Thomas Bürgi
- Department of Physical Chemistry; University of Geneva; Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Jérôme Lacour
- Department of Organic Chemistry; University of Geneva; Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
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20
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Li PH, Yang JM, Wei Y, Shi M. Silver(I)-Catalyzed Intramolecular Cyclizations of Epoxide-Propargylic Esters to 1,4-Oxazine Derivatives. ChemistryOpen 2017; 6:21-24. [PMID: 28168146 PMCID: PMC5288764 DOI: 10.1002/open.201600123] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Indexed: 12/21/2022] Open
Abstract
An interesting silver(I)‐catalyzed, one‐pot intramolecular cyclization of epoxide‐propargylic esters is described. A variety of 1,4‐oxazine derivatives were obtained through a novel domino sequence, including three‐membered ring‐opening, 3,3‐sigmatropic rearrangement, 6‐exo‐cycloisomerization and subsequent intramolecular elimination in moderate yields under mild conditions.
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Affiliation(s)
- Peng-Hua Li
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecule Engineering East China University of Science and Technology 130 Mei Long Road Shanghai 200237 P. R. China
| | - Jin-Ming Yang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecule Engineering East China University of Science and Technology 130 Mei Long Road Shanghai 200237 P. R. China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Linglin Lu Shanghai 200032 P. R. China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry and Molecule Engineering East China University of Science and Technology 130 Mei Long Road Shanghai 200237 P. R. China; State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Linglin Lu Shanghai 200032 P. R. China
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21
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Duret G, Quinlan R, Yin B, Martin RE, Bisseret P, Neuburger M, Gandon V, Blanchard N. Intramolecular Inverse Electron-Demand [4 + 2] Cycloadditions of Ynamides with Pyrimidines: Scope and Density Functional Theory Insights. J Org Chem 2017; 82:1726-1742. [PMID: 28059511 DOI: 10.1021/acs.joc.6b02986] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
4-Aminopyridines are valuable scaffolds for the chemical industry in general, from life sciences to catalysis. We report herein a collection of structurally diverse polycyclic fused and spiro-4-aminopyridines that are prepared in only three steps from commercially available pyrimidines. The key step of this short sequence is a [4 + 2]/retro-[4 + 2] cycloaddition between a pyrimidine and an ynamide, which constitutes the first examples of ynamides behaving as electron-rich dienophiles in [4 + 2] cycloaddition reactions. In addition, running the ihDA/rDA reaction in continuous mode in superheated toluene, to overcome the limited scalability of MW reactions, results in a notable production increase compared to batch mode. Finally, density functional theory investigations shed light on the energetic and geometric requirements of the different steps of the ihDA/rDA sequence.
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Affiliation(s)
- Guillaume Duret
- Laboratoire de Chimie Moléculaire UMR 7509, Université de Strasbourg, CNRS , Strasbourg F-67000, France
| | - Robert Quinlan
- Laboratoire de Chimie Moléculaire UMR 7509, Université de Strasbourg, CNRS , Strasbourg F-67000, France
| | - Boyang Yin
- Laboratoire de Chimie Moléculaire UMR 7509, Université de Strasbourg, CNRS , Strasbourg F-67000, France
| | - Rainer E Martin
- Medicinal Chemistry, Roche Pharma Research and Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche, Ltd. , Grenzacherstrasse 124, Basel CH-4070, Switzerland
| | - Philippe Bisseret
- Laboratoire de Chimie Moléculaire UMR 7509, Université de Strasbourg, CNRS , Strasbourg F-67000, France
| | - Markus Neuburger
- Department of Chemistry, University of Basel , Spitalstrasse 51, Basel CH-4056, Switzerland
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay , bâtiment 420, Orsay cedex 91405, France.,Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay , 1 av. de la Terrasse, Gif-sur-Yvette 91198, France
| | - Nicolas Blanchard
- Laboratoire de Chimie Moléculaire UMR 7509, Université de Strasbourg, CNRS , Strasbourg F-67000, France
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22
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Zeng Z, Jin H, Song X, Wang Q, Rudolph M, Rominger F, Hashmi ASK. Gold-catalyzed intermolecular cyclocarboamination of ynamides with 1,3,5-triazinanes: en route to tetrahydropyrimidines. Chem Commun (Camb) 2017; 53:4304-4307. [DOI: 10.1039/c7cc00789b] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,3,5-Triazinanes serve as surrogates for 1,4-dipoles in gold-catalyzed formal 4+2 cycloadditions.
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Affiliation(s)
- Zhongyi Zeng
- Organisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hongming Jin
- Organisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Xinlong Song
- Organisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Qian Wang
- Organisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Matthias Rudolph
- Organisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Frank Rominger
- Organisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
- Chemistry Department
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23
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Sahani RL, Liu RS. Development of Gold-catalyzed [4+1] and [2+2+1]/[4+2] Annulations between Propiolate Derivatives and Isoxazoles. Angew Chem Int Ed Engl 2016; 56:1026-1030. [DOI: 10.1002/anie.201610665] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Indexed: 01/03/2023]
Affiliation(s)
| | - Rai-Shung Liu
- Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
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24
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Sahani RL, Liu RS. Development of Gold-catalyzed [4+1] and [2+2+1]/[4+2] Annulations between Propiolate Derivatives and Isoxazoles. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201610665] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
| | - Rai-Shung Liu
- Department of Chemistry; National Tsing-Hua University; Hsinchu Taiwan, ROC
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25
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Bull JA, Croft RA, Davis OA, Doran R, Morgan KF. Oxetanes: Recent Advances in Synthesis, Reactivity, and Medicinal Chemistry. Chem Rev 2016; 116:12150-12233. [DOI: 10.1021/acs.chemrev.6b00274] [Citation(s) in RCA: 241] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- James A. Bull
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Rosemary A. Croft
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Owen A. Davis
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Robert Doran
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Kate F. Morgan
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
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26
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Pirovano V, Negrato M, Abbiati G, Dell’Acqua M, Rossi E. Gold-Catalyzed cis-Hydroarylation of Ynamides with Indoles: Regio- and Stereoselective Synthesis of a Class of 2-Vinylindoles. Org Lett 2016; 18:4798-4801. [DOI: 10.1021/acs.orglett.6b02189] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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
| | - Marco Negrato
- Dipartimento
di Scienze Farmaceutiche
− Sezione di Chimica Generale e Organica “A. Marchesini”, Università degli Studi di Milano Via Venezian, 21 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
| | - Monica Dell’Acqua
- 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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27
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Sahani RL, Liu RS. Gold-catalyzed [4+3] and [4+4]-annulation reactions of t-butyl propiolate derivatives with epoxides and oxetanes for the construction of 1,4-dioxepane and 1,5-dioxocane cores. Chem Commun (Camb) 2016; 52:7482-5. [PMID: 27198065 DOI: 10.1039/c6cc02124g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Gold-catalyzed [4+n]-annulations (n = 3, 4) of tert-butyl propiolate derivatives with epoxides or oxetanes proceed smoothly to yield seven- or eight-membered oxacyclic products efficiently. In the context of the [4+3]-annulations, product analysis reveals a retention of stereochemistry upon the intramolecular SN2 attack of an epoxide. We also report the [4+5]-annulation between one tert-butyl propiolate and γ-lactol, to manifest the utility toward medium-sized rings.
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Affiliation(s)
- Rajkumar Lalji Sahani
- Department of Chemistry, National Tsing-Hua University, 101, Sec. 2, Kuang-Fu Rd. Hsinchu, 30013, Taiwan, Republic of China.
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28
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Miaskiewicz S, Weibel JM, Pale P, Blanc A. Gold(I)-Catalyzed Cyclization/Nucleophilic Substitution of 1-(N-Sulfonylazetidin-2-yl) Ynones into N-Sulfonylpyrrolin-4-ones. Org Lett 2016; 18:844-7. [DOI: 10.1021/acs.orglett.6b00135] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Solène Miaskiewicz
- Laboratoire de Synthèse,
Réactivité Organiques et Catalyse, Institut de Chimie, UMR 7177-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg, France
| | - Jean-Marc Weibel
- Laboratoire de Synthèse,
Réactivité Organiques et Catalyse, Institut de Chimie, UMR 7177-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg, France
| | - Patrick Pale
- Laboratoire de Synthèse,
Réactivité Organiques et Catalyse, Institut de Chimie, UMR 7177-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg, France
| | - Aurélien Blanc
- Laboratoire de Synthèse,
Réactivité Organiques et Catalyse, Institut de Chimie, UMR 7177-CNRS, Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg, France
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29
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Pan F, Shu C, Ye LW. Recent progress towards gold-catalyzed synthesis of N-containing tricyclic compounds based on ynamides. Org Biomol Chem 2016; 14:9456-9465. [DOI: 10.1039/c6ob01774f] [Citation(s) in RCA: 221] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The recent advances in the gold-catalyzed construction of N-containing tricycles based on ynamides are reviewed by highlighting their specificity and applicability, and the mechanistic rationale.
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Affiliation(s)
- Fei Pan
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- China
| | - Chao Shu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Key Laboratory for Chemical Biology of Fujian Province
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- China
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30
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Campbell CD, Greenaway RL, Holton OT, Walker PR, Chapman HA, Russell CA, Carr G, Thomson AL, Anderson EA. Ynamide carbopalladation: a flexible route to mono-, bi- and tricyclic azacycles. Chemistry 2015; 21:12627-39. [PMID: 26189754 PMCID: PMC4557052 DOI: 10.1002/chem.201501710] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Indexed: 11/09/2022]
Abstract
Bromoenynamides represent precursors to a diversity of azacycles by a cascade sequence of carbopalladation followed by cross-coupling/electrocyclization, or reduction processes. Full details of our investigations into intramolecular ynamide carbopalladation are disclosed, which include the first examples of carbopalladation/cross-coupling reactions using potassium organotrifluoroborate salts; and an understanding of factors influencing the success of these processes, including ring size, and the nature of the coupling partner. Additional mechanistic observations are reported, such as the isolation of triene intermediates for electrocyclization. A variety of hetero-Diels-Alder reactions using the product heterocycles are also described, which provide insight into Diels-Alder regioselectivity.
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Affiliation(s)
- Craig D Campbell
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA (U.K.) edward E-mail:
| | - Rebecca L Greenaway
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA (U.K.) edward E-mail:
| | - Oliver T Holton
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA (U.K.) edward E-mail:
| | - P Ross Walker
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA (U.K.) edward E-mail:
| | - Helen A Chapman
- Syngenta Ltd. Jealott's Hill International Research CentreBracknell, Berkshire, RG42 6EY (U.K.)
| | - C Adam Russell
- Syngenta Ltd. Jealott's Hill International Research CentreBracknell, Berkshire, RG42 6EY (U.K.)
| | - Greg Carr
- AstraZenecaAlderley Park, Macclesfield, SK10 4TF (U.K.)
| | - Amber L Thomson
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA (U.K.) edward E-mail:
| | - Edward A Anderson
- Chemistry Research Laboratory, University of Oxford12 Mansfield Road, Oxford, OX1 3TA (U.K.) edward E-mail:
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31
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Abstract
Silver is a less expensive noble metal. Superior alkynophilicity due to π-coordination with the carbon-carbon triple bond makes silver salts ideal catalysts for alkyne-based organic reactions. This review highlights the progress in alkyne chemistry via silver catalysis primarily over the past five years (ca. 2010-2014). The discussion is developed in terms of the bond type formed with the acetylenic carbon (i.e., C-C, C-N, C-O, C-Halo, C-P and C-B). Compared with other coinage metals such as Au and Cu, silver catalysis is frequently observed to be unique. This critical review clearly indicates that silver catalysis provides a significant impetus to the rapid evolution of alkyne-based organic reactions, such as alkynylation, hydrofunctionalization, cycloaddition, cycloisomerization, and cascade reactions.
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Affiliation(s)
- Guichun Fang
- Department of Chemistry, Northeast Normal University, Changchun 130024, China.
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Zhou AH, He Q, Shu C, Yu YF, Liu S, Zhao T, Zhang W, Lu X, Ye LW. Atom-economic generation of gold carbenes: gold-catalyzed formal [3+2] cycloaddition between ynamides and isoxazoles. Chem Sci 2015; 6:1265-1271. [PMID: 29560212 PMCID: PMC5811108 DOI: 10.1039/c4sc02596b] [Citation(s) in RCA: 230] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 11/12/2014] [Indexed: 12/21/2022] Open
Abstract
The generation of gold carbenes via the gold-catalyzed intermolecular reaction of nucleophiles containing relatively labile N-O or N-N bonds with alkynes has received considerable attention during recent years. However, this protocol is not atom-economic as the reaction produces a stoichiometric amount of pyridine or quinoline waste, the cleaved part of the N-O or N-N bonds. In this article, we disclose an unprecedented gold-catalyzed formal [3+2] cycloaddition between ynamides and isoxazoles, allowing rapid and practical access to a wide range of synthetically-useful 2-aminopyrroles. Most importantly, mechanistic studies and theoretical calculations revealed that this reaction presumably proceeds via an α-imino gold carbene pathway, thus providing a strategically novel, atom-economic route to the generation of gold carbenes. Other significant features of this approach include the use of readily-available starting materials, high flexibility, simple procedure, mild reaction conditions, and in particular, no need to exclude moisture or air ("open flask").
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Affiliation(s)
- Ai-Hua Zhou
- State Key Laboratory for Physical Chemistry of Solid Surfaces , The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , Fujian , P. R. China . ; ; Tel: +86-592-218-5833
| | - Qiao He
- State Key Laboratory of Physical Chemistry of Solid Surfaces , Key Laboratory for Theoretical and Computational Chemistry of Fujian Province and Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , Fujian , P. R. China .
| | - Chao Shu
- State Key Laboratory for Physical Chemistry of Solid Surfaces , The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , Fujian , P. R. China . ; ; Tel: +86-592-218-5833
| | - Yong-Fei Yu
- State Key Laboratory for Physical Chemistry of Solid Surfaces , The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , Fujian , P. R. China . ; ; Tel: +86-592-218-5833
| | - Shuang Liu
- State Key Laboratory for Physical Chemistry of Solid Surfaces , The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , Fujian , P. R. China . ; ; Tel: +86-592-218-5833
| | - Tian Zhao
- State Key Laboratory for Physical Chemistry of Solid Surfaces , The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , Fujian , P. R. China . ; ; Tel: +86-592-218-5833
| | - Wei Zhang
- State Key Laboratory for Physical Chemistry of Solid Surfaces , The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , Fujian , P. R. China . ; ; Tel: +86-592-218-5833
| | - Xin Lu
- State Key Laboratory of Physical Chemistry of Solid Surfaces , Key Laboratory for Theoretical and Computational Chemistry of Fujian Province and Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , Fujian , P. R. China .
| | - Long-Wu Ye
- State Key Laboratory for Physical Chemistry of Solid Surfaces , The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry , College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , Fujian , P. R. China . ; ; Tel: +86-592-218-5833
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Martinand-Lurin E, Gruber R, Retailleau P, Fleurat-Lessard P, Dauban P. Studies on the formal [3 + 2] cycloaddition of aziridines with alkenes for the synthesis of 1-azaspiroalkanes. J Org Chem 2015; 80:1414-26. [PMID: 25521526 DOI: 10.1021/jo502333j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The Lewis acid-mediated [3 + 2] cycloaddition of N-sulfonyl- and N-sulfamoylaziridines with alkenes provides a rapid and efficient access to 1-azaspiro[4.n]alkanes. Experimental studies have been combined with DFT calculations to explore the mechanism of the reaction. They demonstrate that the nature of the electron-withdrawing nitrogen protecting group has a very limited influence on the course of the reaction and, particularly, on the initial formation of the 1,3-zwitterionic species through C-N bond cleavage, which has been found to be the rate-determining step. Compared to N-sulfonylaziridines, N-sulfamoylaziridines have proved to be more synthetically useful synthons that afford crystalline polycyclic structures in good yields. A short sequence of catalytic C(sp(3))-H amination-cyclization-[3 + 2] cycloaddition has then been successfully designed to afford the homologue 1-azaspiro[5.n]alkanes, thereby illustrating the higher versatility of sulfamates in these cycloadditions.
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Affiliation(s)
- Elodie Martinand-Lurin
- Centre de Recherche de Gif-sur-Yvette, Institut de Chimie des Substances Naturelles, UPR 2301 CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France
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Mansfield SJ, Campbell CD, Jones MW, Anderson EA. A robust and modular synthesis of ynamides. Chem Commun (Camb) 2015; 51:3316-9. [DOI: 10.1039/c4cc07876d] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A flexible, modular ynamide synthesis is reported that uses a wide range of amides and electrophiles, including acyclic carbamates, hindered sulfonamides, and aryl amides.
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Yang Y, Wang L, Zhang F, Zhu G. Preparation of (Z)-α,β-disubstituted enamides via palladium-catalyzed addition of boronic acids to ynamides. J Org Chem 2014; 79:9319-24. [PMID: 25229505 DOI: 10.1021/jo501894j] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A Pd-catalyzed, highly regio- and stereoselective addition of boronic acids to ynamides has been realized. This protocol generates (Z)-α,β-disubstituted enamides in high yields with excellent regio- and stereoselectivity under the mild reaction conditions, thereby providing a good complementary method for the diverse synthesis of multifunctional enamides. A wide collection of functional groups are found to be tolerated. It represents a straightforward and useful means to assemble stereodefined enamides from readily available starting materials.
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Affiliation(s)
- Yuanfa Yang
- Department of Chemistry, Zhejiang Normal University , 688 Yingbin Road, Jinhua 321004, China
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