β-Siloxy-α-haloketones through Highly Diastereoselective Single and Double Mukaiyama Aldol Reactions
作者:Jakub Saadi、Hisashi Yamamoto
DOI:10.1002/chem.201204493
日期:2013.3.18
Double‐action haloketones: A super silyl group enabled the first highly diastereoselective Mukaiyama aldol reactions of α‐chloro‐ and α‐fluoroketones with a wide range of aldehydes, providing anti‐β‐siloxy‐α‐haloketones. This process is compatible with one‐pot double‐aldol methodology and allows for rapid access to new halogen‐modified polyketide fragments bearing up to four contiguous stereocenters
双作用卤代酮:超级甲硅烷基使α-氯代酮和α-氟代酮与多种醛发生首次高度非对映选择性Mukaiyama羟醛反应,从而提供反-β-甲硅烷氧基-α-卤代酮。该过程与一锅双羟醛方法兼容,并允许快速获得具有多达四个连续立体中心的新卤素改性聚酮化合物片段(参见方案)。