PROCESS FOR SYNTHESIS OF 2-SUBSTITUTED PYRROLIDINES AND PIPERADINES
申请人:Leleti Rajender Reddy
公开号:US20120302756A1
公开(公告)日:2012-11-29
The present invention provides a highly efficient, versatile one-step process for asymmetric synthesis of either diastereomer of 2-substituted pyrrolidines from a single starting material with excellent yields and high diastereoselectivety. Also provided is a method for the asymmetric synthesis of both diastereomers of 2-substituted piperidines with good yields and excellent diastereoselectivety. Diasteroselectivity is controlled effectively by choice of reducing agent.
[EN] PROCESS FOR SYNTHESIS OF 2-SUBSTITUTED PYRROLIDINES AND PIPERADINES<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE PYRROLIDINES ET DE PIPÉRIDINES SUBSTITUÉES EN POSITION 2
申请人:NOVARTIS AG
公开号:WO2011103263A2
公开(公告)日:2011-08-25
The present invention provides a highly efficient, versatile one-step process for asymmetric synthesis of either diastereomer of 2-substituted pyrrolidines from a single starting material with excellent yields and high diastereoselectivety. Also provided is a method for the asymmetric synthesis of both diastereomers of 2-substituted piperidines with good yields and excellent diastereoselectivety. Diasteroselectivity is controlled effectively by choice of reducing agent.
Asymmetric synthesis of 2-arylpyrrolidines starting from γ-chloro N-(tert-butanesulfinyl)ketimines
作者:Erika Leemans、Sven Mangelinckx、Norbert De Kimpe
DOI:10.1039/b925209f
日期:——
The enantioselective reductive cyclization of gamma-chloro N-(tert-butanesulfinyl)ketimines towards the short and efficient synthesis of (S)- and (R)-2-arylpyrrolidines (ee >99%) is described for the first time by treatment with LiBEt(3)H and subsequent acid deprotection.