51
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Wang Y, Wang H, Liu Z. Research Progress on EWG-Substituted N-Arylsulfonylhydrazones as the Diazo Compound Precursor. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a21040179] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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52
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Zhang Z, Gao Y, Chen S, Wang J. Transition-Metal-Catalyzed Polymerization of Cyclopropenes. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202010024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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53
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Abstract
Treatment of bis(pyrazolyl)borate ligand supported [(CF3)2Bp]Cu(NCMe) with 1,2,3-trisubstituted cyclopropenes produced thermally stable copper(I) η2-cyclopropene complexes amenable to detailed solution and solid-state analysis. The [(CF3)2Bp]Cu(NCMe) also catalyzed [2 + 1]-cycloaddition chemistry of terminal and internal alkynes with ethyl diazoacetate affording cyclopropenes, including those used as ligands in this work. The tris(pyrazolyl)borate [(CF3)2Tp]Cu(NCMe) is a competent catalyst for this process as well. The treatment of [(CF3)2Tp]Cu with ethyl 2,3-diethylcycloprop-2-enecarboxylate substrate gave an O-bonded rather than a η2-cyclopropene copper complex.
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Affiliation(s)
- Anurag Noonikara-Poyil
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, United States
| | - Shawn G Ridlen
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, United States
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, United States
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54
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Kou L, Dai P, Bao X. Mechanistic Insights into the Rh(I)/Rh
2
(II)‐Catalyzed Divergent Ring‐Opening of Cyclopropenes: A Computational Study. ChemCatChem 2020. [DOI: 10.1002/cctc.202001149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Luyao Kou
- College of Chemistry Chemical Engineering and Materials Science Soochow University 199 Ren-Ai Road Suzhou Industrial Park Suzhou Jiangsu 215123 P.R. China
| | - Ping Dai
- College of Chemistry Chemical Engineering and Materials Science Soochow University 199 Ren-Ai Road Suzhou Industrial Park Suzhou Jiangsu 215123 P.R. China
| | - Xiaoguang Bao
- College of Chemistry Chemical Engineering and Materials Science Soochow University 199 Ren-Ai Road Suzhou Industrial Park Suzhou Jiangsu 215123 P.R. China
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55
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Zhang M, Zhang T, Zhang D, Hu W. Diastereoselective Trapping of Transient Carboxylic Oxonium Ylides with α,β‐Unsaturated 2‐Acyl Imidazoles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000701] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mengchu Zhang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 China
| | - Tianyuan Zhang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 China
| | - Dan Zhang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 China
| | - Wenhao Hu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 China
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56
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Yamani K, Pierre H, Archambeau A, Meyer C, Cossy J. Asymmetric Transfer Hydrogenation of
gem
‐Difluorocyclopropenyl Esters: Access to Enantioenriched
gem
‐Difluorocyclopropanes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008572] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Khalil Yamani
- Molecular, Macromolecular Chemistry, and Materials ESPCI Paris, PSL University CNRS 10 rue Vauquelin 75005 Paris France
| | - Hugo Pierre
- Molecular, Macromolecular Chemistry, and Materials ESPCI Paris, PSL University CNRS 10 rue Vauquelin 75005 Paris France
| | - Alexis Archambeau
- Molecular, Macromolecular Chemistry, and Materials ESPCI Paris, PSL University CNRS 10 rue Vauquelin 75005 Paris France
| | - Christophe Meyer
- Molecular, Macromolecular Chemistry, and Materials ESPCI Paris, PSL University CNRS 10 rue Vauquelin 75005 Paris France
| | - Janine Cossy
- Molecular, Macromolecular Chemistry, and Materials ESPCI Paris, PSL University CNRS 10 rue Vauquelin 75005 Paris France
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57
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Yamani K, Pierre H, Archambeau A, Meyer C, Cossy J. Asymmetric Transfer Hydrogenation of gem-Difluorocyclopropenyl Esters: Access to Enantioenriched gem-Difluorocyclopropanes. Angew Chem Int Ed Engl 2020; 59:18505-18509. [PMID: 32614985 DOI: 10.1002/anie.202008572] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Indexed: 12/24/2022]
Abstract
Catalytic enantioselective access to disubstituted functionalized gem-difluorocyclopropanes, which are emerging fluorinated motifs of interest in medicinal chemistry, was achieved through asymmetric transfer hydrogenation of gem-difluorocyclopropenyl esters, catalyzed by a Noyori-Ikariya (p-cymene)-ruthenium(II) complex, with (N-tosyl-1,2-diphenylethylenediamine) as the chiral ligand and isopropanol as the hydrogen donor. The resulting cis-gem-difluorocyclopropyl esters were obtained with moderate to high enantioselectivity (ee=66-99 %), and post-functionalization reactions enable access to valuable building blocks incorporating a cis- or trans-gem-difluorocyclopropyl motif.
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Affiliation(s)
- Khalil Yamani
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, PSL University, CNRS, 10 rue Vauquelin, 75005, Paris, France
| | - Hugo Pierre
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, PSL University, CNRS, 10 rue Vauquelin, 75005, Paris, France
| | - Alexis Archambeau
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, PSL University, CNRS, 10 rue Vauquelin, 75005, Paris, France
| | - Christophe Meyer
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, PSL University, CNRS, 10 rue Vauquelin, 75005, Paris, France
| | - Janine Cossy
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, PSL University, CNRS, 10 rue Vauquelin, 75005, Paris, France
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58
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Prasad Raiguru B, Nayak S, Ranjan Mishra D, Das T, Mohapatra S, Priyadarsini Mishra N. Synthetic Applications of Cyclopropene and Cyclopropenone: Recent Progress and Developments. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000193] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Sabita Nayak
- Department of ChemistryRavenshaw University Cuttack Odisha India
| | | | - Tapaswini Das
- Department of ChemistryRavenshaw University Cuttack Odisha India
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59
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Zhang D, Wang X, Zhang M, Hu W. Rhodium-Catalyzed Sequential Cycloisomerization/Aldol Addition of Cyclopropene Carboxylic Acids with Isatins. Org Lett 2020; 22:5600-5604. [PMID: 32628497 DOI: 10.1021/acs.orglett.0c01957] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A unique, rhodium-catalyzed reaction of cyclopropene carboxylic acids with isatins has been developed, which takes place through a trapping process of transient cyclic carboxylic oxonium ylides. This reaction tolerates a wide variety of cyclopropene carboxylic acids and N-protected or unprotected isatins and represents a new, direct strategy to access valuable γ-substituted γ-butenolide architectures containing an oxindole moiety in very high yields under mild reaction conditions.
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Affiliation(s)
- Dan Zhang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Xin Wang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Mengchu Zhang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Wenhao Hu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, China
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60
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Ross RJ, Jeyaseelan R, Lautens M. Rhodium-Catalyzed Intermolecular Cyclopropanation of Benzofurans, Indoles, and Alkenes via Cyclopropene Ring Opening. Org Lett 2020; 22:4838-4843. [PMID: 32496786 DOI: 10.1021/acs.orglett.0c01655] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The generation of metal carbenoids via ring opening of cyclopropenes by transition metals offers a simple entry into highly reactive intermediates. Herein, we describe a diastereoselective intermolecular rhodium-catalyzed cyclopropanation of heterocycles and alkenes using cyclopropenes as carbene precursors with a low loading of a commercially available rhodium catalyst. The reported method is scalable and could be performed with catalyst loadings as low as 0.2 mol %, with no impact to the reaction yield or selectivity.
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Affiliation(s)
- Rachel J Ross
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Rubaishan Jeyaseelan
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Mark Lautens
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
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