1
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Kong X, Ren J, Li J, Liu Y, Li K. Modular Synthesis of α-Aryl-α-Heteroaryl α-Amino Acid Derivatives via a Copper-Catalyzed Cross-Dehydrogenative-Coupling Reaction Using Air as the Sole Oxidant. Org Lett 2023; 25:7073-7077. [PMID: 37767976 DOI: 10.1021/acs.orglett.3c01934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
A novel copper-catalyzed cross-dehydrogenative-coupling (CDC) process of arylglycine derivatives with N-heteroarenes for the straightforward synthesis of α-aryl-α-heteroaryl α-amino acid scaffolds has been successfully developed. This protocol exhibits a broad substrate scope with good functional group compatibility by utilizing air as the sole oxidant. The use of the reaction is also displayed through the late-stage functionalization of arylglycines bearing natural compounds or drug motifs.
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Affiliation(s)
- Xiangxiang Kong
- Biophamaceutical Research Institute, West China Hospital, Sichuan University, 37 Guoxue Alley, Chengdu 610041, China
| | - Jing Ren
- Biophamaceutical Research Institute, West China Hospital, Sichuan University, 37 Guoxue Alley, Chengdu 610041, China
| | - Jinlong Li
- Biophamaceutical Research Institute, West China Hospital, Sichuan University, 37 Guoxue Alley, Chengdu 610041, China
| | - Yu Liu
- Biophamaceutical Research Institute, West China Hospital, Sichuan University, 37 Guoxue Alley, Chengdu 610041, China
| | - Kaizhi Li
- Biophamaceutical Research Institute, West China Hospital, Sichuan University, 37 Guoxue Alley, Chengdu 610041, China
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2
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Shen HR, Li CX, Jiang X, Lin Y, Liu JH, Zhu F, Wu ZL, Cai T, Wen W, He RX, Guo QX. Chiral aldehyde catalysis enables direct asymmetric α-substitution reaction of N-unprotected amino acids with halohydrocarbons. Chem Sci 2023; 14:5665-5671. [PMID: 37265737 PMCID: PMC10231321 DOI: 10.1039/d3sc01294h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 05/02/2023] [Indexed: 06/03/2023] Open
Abstract
The direct catalytic α-hydrocarbylation of readily available amino acids with halohydrocarbons is one of the most straightforward methods leading to α,α-disubstituted non-proteinogenic α-amino acid compounds. However, all the reported methodologies depend on N-protected amino acids as starting materials. Herein, we report on three highly efficient aldehyde-catalyzed direct α-hydrocarbylations of N-unprotected amino acid esters with aryl-, allyl-, and benzyl halides. By promoting a simple chiral BINOL-aldehyde catalyst or combining catalysts of a chiral aldehyde and Lewis acid ZnCl2, the asymmetric α-arylation, α-allylation, and α-benzylation of amino acid esters with the corresponding halohydrocarbons proceed smoothly, producing α,α-disubstituted α-amino acids in moderate-to-high yields and good-to-excellent enantioselectivities. The asymmetric α-arylation reaction can be applied in the formal synthesis of the clinical candidate compound (+)-AG-041R. Based on the results given by control experiments, three reaction models are proposed to illustrate the stereoselective-control outcomes.
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Affiliation(s)
- Hao-Ran Shen
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Chao-Xing Li
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Xin Jiang
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Yao Lin
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Jian-Hua Liu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Fang Zhu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Zhu-Lian Wu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Tian Cai
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Wei Wen
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Rong-Xing He
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
| | - Qi-Xiang Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality, Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University Chongqing 400715 China
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3
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Beutner GL, George DT. Opportunities for the Application and Advancement of the Corey–Chaykovsky Cyclopropanation. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Gregory L. Beutner
- Chemical Process Development, Bristol Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - David T. George
- Chemical Process Development, Bristol Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
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4
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Sterligov G, Ageshina AA, Rzhevskiy SA, Shurupova OV, Topchiy MA, Minaeva LI, Asachenko AF. One-Pot Modified Madelung Synthesis of 3-Tosyl- and 3-Cyano-1,2-disubstituted Indoles. ACS OMEGA 2022; 7:38505-38511. [PMID: 36340104 PMCID: PMC9631411 DOI: 10.1021/acsomega.2c03754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
A One-pot, two-step procedure for the synthesis of 1,2-disubstituted-3-tosyl and 1,2-disubstituted-3-cyanoindoles from the corresponding N-(o-tolyl)benzamides is reported. The developed procedure is operationally simple, does not utilize any transition metals, and provides variably substituted indoles in good yields from readily available starting materials.
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5
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Calcatelli A, Denton RM, Ball LT. Modular Synthesis of α,α-Diaryl α-Amino Esters via Bi(V)-Mediated Arylation/S N2-Displacement of Kukhtin–Ramirez Intermediates. Org Lett 2022; 24:8002-8007. [PMID: 36278869 PMCID: PMC9641671 DOI: 10.1021/acs.orglett.2c03201] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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We report a concise and modular approach to α,α-diaryl
α-amino esters from readily available α-keto esters. This
mild, one-pot protocol proceeds via ketone umpolung, with in situ formation of a Kukhtin–Ramirez intermediate
preceding sequential electrophilic arylation by Bi(V) and SN2 displacement by an amine. The methodology is compatible with a
wide range of anilines and primary amines - including derivatives
of drugs and proteinogenic amino acids - Bi(V) arylating agents, and
α-keto ester substrates.
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Affiliation(s)
| | - Ross M. Denton
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, U.K
- GlaxoSmithKline Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, 6 Triumph Road, Nottingham NG7 2GA, U.K
| | - Liam T. Ball
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, U.K
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6
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Loro C, Sala R, Penso M, Foschi F. DBU Catalysed Enantioselective Degradative Rearrangement: a Way to Tetrasubstituted 2‐Aryl‐2‐Amino Esters. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Camilla Loro
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 9 IT-20100 Como Italy
| | - Roberto Sala
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 9 IT-20100 Como Italy
| | - Michele Penso
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC) Via Golgi 19 IT-20133 Milano Italy
| | - Francesca Foschi
- Dipartimento di Scienza e Alta Tecnologia Università degli Studi dell'Insubria Via Valleggio 9 IT-20100 Como Italy
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7
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Puleo TR, Sujansky SJ, Wright SE, Bandar JS. Organic Superbases in Recent Synthetic Methodology Research. Chemistry 2021; 27:4216-4229. [DOI: 10.1002/chem.202003580] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Indexed: 12/23/2022]
Affiliation(s)
- Thomas R. Puleo
- Department of Chemistry Colorado State University Fort Collins Colorado 80523 USA
| | - Stephen J. Sujansky
- Department of Chemistry Colorado State University Fort Collins Colorado 80523 USA
| | - Shawn E. Wright
- Department of Chemistry Colorado State University Fort Collins Colorado 80523 USA
| | - Jeffrey S. Bandar
- Department of Chemistry Colorado State University Fort Collins Colorado 80523 USA
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8
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Michelet B, Castelli U, Appert E, Boucher M, Vitse K, Marrot J, Guillard J, Martin-Mingot A, Thibaudeau S. Access to Optically Pure Benzosultams by Superelectrophilic Activation. Org Lett 2020; 22:4944-4948. [PMID: 32573238 DOI: 10.1021/acs.orglett.0c01301] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Through superacid activation, N-(arenesulfonyl)-aminoalcohols derived from readily available ephedrines or amino acids undergo an intramolecular Friedel-Crafts reaction to afford enantiopure benzosultams bearing two adjacent stereocenters in high yields with fully controlled diastereoselectivity. Low-temperature NMR spectroscopy demonstrated the crucial role played by the conformationally restricted chiral dicationic intermediates.
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Affiliation(s)
- Bastien Michelet
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Ugo Castelli
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Emeline Appert
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Maude Boucher
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Kassandra Vitse
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Jérôme Marrot
- Institut Lavoisier de Versailles, UMR CNRS 8180, 45 avenue des Etats-Unis, Versailles 78035 Cedex, France
| | - Jérôme Guillard
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Agnès Martin-Mingot
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
| | - Sébastien Thibaudeau
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique, 4 rue Michel Brunet, TSA 51106, Poitiers 86073 Cedex 9, France
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9
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Mambrini A, Gori D, Kouklovsky C, Kim H, Yoshida JI, Alezra V. Memory of Chirality in a Flow-Based System: Enantioselective Synthesis of Quaternary α-Amino Acids Using Flow Microreactors. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801305] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Antonin Mambrini
- Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques; ICMMO, UMR 8182, CNRS, Univ. Paris-Sud; Université Paris-Saclay, Faculté des Sciences d′Orsay; Bât 410 91405 Orsay France
| | - Didier Gori
- Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques; ICMMO, UMR 8182, CNRS, Univ. Paris-Sud; Université Paris-Saclay, Faculté des Sciences d′Orsay; Bât 410 91405 Orsay France
| | - Cyrille Kouklovsky
- Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques; ICMMO, UMR 8182, CNRS, Univ. Paris-Sud; Université Paris-Saclay, Faculté des Sciences d′Orsay; Bât 410 91405 Orsay France
| | - Heejin Kim
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University; Nishikyo-ku 615-8510 Kyoto Japan
| | - Jun-ichi Yoshida
- Suzuka College; National Institute of Technology; 510-0294 Suzuka, Mie Japan
| | - Valérie Alezra
- Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques; ICMMO, UMR 8182, CNRS, Univ. Paris-Sud; Université Paris-Saclay, Faculté des Sciences d′Orsay; Bât 410 91405 Orsay France
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10
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Maheshwar Rao B, Yadav JS, Sridhar B, Subba Reddy BV. Silver(i)-catalyzed sequential hydroamination and Prins type cyclization for the synthesis of fused benzo-δ-sultams. Org Biomol Chem 2018; 16:5163-5166. [PMID: 29964283 DOI: 10.1039/c8ob00918j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
An intramolecular annulation strategy has been developed for the synthesis of tetrahydrobenzo[e]pyrano[4,3-c][1,2]thiazine derivatives by means of coupling of aldehydes with 2-(4-hydroxybut-1-yn-1-yl)-N-arylsulfonamides using a catalytic amount of silver hexafluoroantimonate in toluene at 80 °C. This is the first report on the synthesis of fused benzo-δ-sultam derivatives through C-N, C-O, and C-C bond formations. The reaction proceeds through a cascade of hydroamination and Prins type cyclization.
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Affiliation(s)
- B Maheshwar Rao
- Centre for Semiochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India.
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11
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Veeraswamy V, Goswami G, Mukherjee S, Ghosh K, Saha ML, Sengupta A, Ghorai MK. Memory of Chirality Concept in Asymmetric Intermolecular Michael Addition of α-Amino Ester Enolates to Enones and Nitroalkenes. J Org Chem 2018; 83:1106-1115. [PMID: 29272115 DOI: 10.1021/acs.joc.7b02315] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly stereoselective asymmetric intermolecular conjugate addition of α-amino ester derivatives to cyclic enones via the memory of chirality (MOC) concept in high yields with excellent diastereo- and enantioselectivity (dr >99:1, up to 99% ee) is reported. The applicability and the generality of the strategy was demonstrated by its further exploration to acyclic α,β-unsaturated ketone and aromatic nitroalkenes, resulting in the formation of δ-keto-α-amino ester derivative and γ-nitro-α-amino ester derivatives, respectively, with excellent ee and dr.
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Affiliation(s)
| | - Gaurav Goswami
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | | | - Koena Ghosh
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | - Manik Lal Saha
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | - Arunava Sengupta
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
| | - Manas K Ghorai
- Department of Chemistry, Indian Institute of Technology , Kanpur, 208016, India
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12
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Affiliation(s)
- Sudarshan Debnath
- Department of Chemistry; Syamsundar College; 713424 Shyamsundar India
| | - Shovan Mondal
- Department of Chemistry; Syamsundar College; 713424 Shyamsundar India
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13
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Tomohara K, Kasamatsu K, Yoshimura T, Furuta T, Kawabata T. Asymmetric Synthesis of Multisubstituted Dihydrobenzofurans by Intramolecular Conjugate Addition of Short-Lived C-O Axially Chiral Enolates. Chem Pharm Bull (Tokyo) 2016; 64:899-906. [PMID: 27150792 DOI: 10.1248/cpb.c16-00272] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Enantioselective intramolecular conjugate addition reactions of short-lived C-O axially chiral enolates have been developed. The reactions proceeded with inversion of the configuration and provided dihydrobenzofurans with contiguous tetra- and trisubstituted carbon centers in up to 96% enantiomeric excess (ee).
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14
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Sokolyuk PA, Kondratov IS, Gavrylenko OV, Tolmachov AA. Synthesis of diverse pyrazole-4-sulfonyl chlorides starting from 2-(benzylthio)malonaldehyde. Mol Divers 2015; 20:1-7. [PMID: 26363794 DOI: 10.1007/s11030-015-9633-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Accepted: 08/25/2015] [Indexed: 11/25/2022]
Abstract
A series of pyrazole-4-sulfonyl chlorides was obtained by a convenient 2-step method starting from synthetically available 2-(benzylthio)malonaldehyde. The method can be applied for the effective multi-gram synthesis of diverse pyrazole-containing sulfonyl chlorides which are mostly not available by other methods.
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Affiliation(s)
- Pavlo A Sokolyuk
- Kyiv National Taras Shevchenko University, 64 Volodymirska st., Kyiv, 33, 01033, Ukraine
- Enamine Ltd., 23 A. Matrosova st., Kyiv, 01103, Ukraine
| | - Ivan S Kondratov
- Enamine Ltd., 23 A. Matrosova st., Kyiv, 01103, Ukraine.
- Institute of Bioorganic Chemistry and Petrochemistry, National Ukrainian Academy of Science, Murmanska 1, Kyiv, 94, 02660, Ukraine.
| | - Olexiy V Gavrylenko
- Kyiv National Taras Shevchenko University, 64 Volodymirska st., Kyiv, 33, 01033, Ukraine
- Enamine Ltd., 23 A. Matrosova st., Kyiv, 01103, Ukraine
| | - Andrey A Tolmachov
- Kyiv National Taras Shevchenko University, 64 Volodymirska st., Kyiv, 33, 01033, Ukraine
- Enamine Ltd., 23 A. Matrosova st., Kyiv, 01103, Ukraine
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15
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Kim JH, Lee S, Kim S. Biomimetic Total Synthesis of (−)-Penibruguieramine A Using Memory of Chirality and Dynamic Kinetic Resolution. Angew Chem Int Ed Engl 2015; 54:10875-8. [DOI: 10.1002/anie.201504954] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Indexed: 11/07/2022]
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16
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Kim JH, Lee S, Kim S. Biomimetic Total Synthesis of (−)-Penibruguieramine A Using Memory of Chirality and Dynamic Kinetic Resolution. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504954] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Atkinson RC, Fernández-Nieto F, Mas Roselló J, Clayden J. Pseudoephedrine-Directed Asymmetric α-Arylation of α-Amino Acid Derivatives. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502569] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Atkinson RC, Fernández-Nieto F, Mas Roselló J, Clayden J. Pseudoephedrine-Directed Asymmetric α-Arylation of α-Amino Acid Derivatives. Angew Chem Int Ed Engl 2015; 54:8961-5. [DOI: 10.1002/anie.201502569] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 05/06/2015] [Indexed: 11/10/2022]
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19
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Kumaran RS, Mehta G. An enantiodivergent protocol from R-(−)-carvone: synthesis of dihydroagarofuran sesquiterpenoid 1-deacetoxy-ent-orbiculin A. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.01.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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20
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Nakamura S, Sano M, Toda A, Nakane D, Masuda H. Organocatalytic Enantioselective Decarboxylative Reaction of Malonic Acid Half Thioesters with CyclicN-Sulfonyl Ketimines by UsingN-Heteroarenesulfonyl Cinchona Alkaloid Amides. Chemistry 2015; 21:3929-32. [DOI: 10.1002/chem.201406270] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Indexed: 11/09/2022]
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21
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Šumanovac Ramljak T, Sohora M, Antol I, Kontrec D, Basarić N, Mlinarić-Majerski K. Memory of chirality in the phthalimide photocyclization of adamantane dipeptides. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.118] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Kothapalli RB, Niddana R, Balamurugan R. Synthesis of Chiral α-Diarylacetic Esters by Stereospecific 1,2-Aryl Migration Promoted by in Situ Generated Acetals from Benzoins. Org Lett 2014; 16:1278-81. [DOI: 10.1021/ol500292c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Raveendra Babu Kothapalli
- School of Chemistry, University of Hyderabad, Dr. C. R. Rao Road, Gachibowli, Hyderabad 500046, India
| | - Ramana Niddana
- School of Chemistry, University of Hyderabad, Dr. C. R. Rao Road, Gachibowli, Hyderabad 500046, India
| | - Rengarajan Balamurugan
- School of Chemistry, University of Hyderabad, Dr. C. R. Rao Road, Gachibowli, Hyderabad 500046, India
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23
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Ye W, Zhang L, Ni C, Rong J, Hu J. Stereoselective [3+2] cycloaddition of N-tert-butanesulfinyl imines to arynes facilitated by a removable PhSO2CF2 group: synthesis and transformation of cyclic sulfoximines. Chem Commun (Camb) 2014; 50:10596-9. [DOI: 10.1039/c4cc05042h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
An unprecedented [3+2] cycloaddition between N-tert-butane sulfinyl imines and arynes provides a stereoselective method for the synthesis of cyclic sulfoximines.
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Affiliation(s)
- Wenchao Ye
- Key Laboratory of Organofluorine Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai, China
| | - Laijun Zhang
- Key Laboratory of Organofluorine Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai, China
| | - Chuanfa Ni
- Key Laboratory of Organofluorine Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai, China
| | - Jian Rong
- Key Laboratory of Organofluorine Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai, China
| | - Jinbo Hu
- Key Laboratory of Organofluorine Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai, China
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