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Xiang Y, Du R, Wang S, Wu X, Tang J, Yang F, Xing D. KOtBu-catalysed α-homoallylic alkylation of acyclic amides with 1-aryl-1,3-dienes. Mol Divers 2022:10.1007/s11030-022-10503-8. [PMID: 36001226 DOI: 10.1007/s11030-022-10503-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 07/19/2022] [Indexed: 11/28/2022]
Abstract
Herein, we report a KOtBu-catalysed α-homoallylic alkylation of acyclic amides with 1-aryl-1,3-dienes. With this transition metal-free and atom-economic protocol, a series of α-homoallylic alkylated acyclic amides were synthesized in good to excellent yields. This transformation is proposed to proceed through a cation-π interaction-based C-C bond formation from the in situ-generated potassium enolate with the diene unit.
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Affiliation(s)
- Yunfei Xiang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Ruisheng Du
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Shang Wang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Xiang Wu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Jie Tang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China
| | - Fan Yang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China.
| | - Dong Xing
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China.
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Zaid Y, Mboyi CD, Drapeau MP, Radal L, Chahdi FO, Rodi YK, Ollevier T, Taillefer M. Transition-Metal-Free α-Vinylation of Enolizable Ketones with β-Bromostyrenes. Org Lett 2019; 21:1564-1568. [PMID: 30801194 DOI: 10.1021/acs.orglett.8b04004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An α-vinylation of enolizable ketones has been developed by using β-bromostyrenes and a KO tBu/NMP system. β,γ-Unsaturated ketones of E configuration were obtained in excellent yield and selectivity. Further synthetic possibilities are highlighted by one-pot functionalization via trapping of intermediate dienolates with alkyl, allyl, benzyl, and propargyl halides to generate quaternary centers. The reported transformation is believed to involve phenylacetylene and propargylic alcohol derivatives.
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Affiliation(s)
- Yassir Zaid
- Laboratoire de Chimie Organique Appliquée , FST Fès BP 2202 , 30000 Fès , Morocco.,CNRS, UMR 5253, AM2N , Institut Charles Gerhardt Montpellier ENSCM , 8 rue de l'École Normale , F-34296 Montpellier Cedex 5 , France
| | - Clève Dionel Mboyi
- CNRS, UMR 5253, AM2N , Institut Charles Gerhardt Montpellier ENSCM , 8 rue de l'École Normale , F-34296 Montpellier Cedex 5 , France
| | - Martin Pichette Drapeau
- Département de chimie , Université Laval , 1045 avenue de la Médecine , Québec (Québec), G1V 0A6 , Canada.,CNRS, UMR 5253, AM2N , Institut Charles Gerhardt Montpellier ENSCM , 8 rue de l'École Normale , F-34296 Montpellier Cedex 5 , France
| | - Léa Radal
- Département de chimie , Université Laval , 1045 avenue de la Médecine , Québec (Québec), G1V 0A6 , Canada
| | | | - Youssef Kandri Rodi
- Laboratoire de Chimie Organique Appliquée , FST Fès BP 2202 , 30000 Fès , Morocco
| | - Thierry Ollevier
- Département de chimie , Université Laval , 1045 avenue de la Médecine , Québec (Québec), G1V 0A6 , Canada
| | - Marc Taillefer
- CNRS, UMR 5253, AM2N , Institut Charles Gerhardt Montpellier ENSCM , 8 rue de l'École Normale , F-34296 Montpellier Cedex 5 , France
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Formation mechanism and conformational structure of 2,3,4-trimethyl-1,5-di(thiophen-2-yl)pentane-1,5-dione: quantum chemical study. Russ Chem Bull 2016. [DOI: 10.1007/s11172-016-1311-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Assemblage of 1-hydroxy-2-cyclopentene and 7-methylene-6,8-dioxabicyclo[3.2.1]octane from acetylene and 4-acetylpyridine molecules in a suspension of KOH-DMSO. Russ Chem Bull 2014. [DOI: 10.1007/s11172-014-0755-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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