作者:Akira Yanagisawa、Ryoji Miyake、Kazuhiro Yoshida
DOI:10.1002/ejoc.201402351
日期:2014.7
A catalytic asymmetric aldol reaction of alkenyl trihaloacetates or a γ,δ-unsaturated δ-lactone with aldehydes or an α-keto ester was achieved by using a 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl·silver trifluoromethanesulfonate complex as the chiral precatalyst and N,N-diisopropylethylamine as the base precatalyst in the presence of methanol. Optically active α-alkyl β-hydroxy ketones with enantioselectivities
通过使用 2,2'-双(二苯基膦)-1,1'-联萘·三氟甲磺酸银实现了烯基三卤乙酸酯或 γ,δ-不饱和 δ-内酯与醛或 α-酮酯的催化不对称醛醇反应在甲醇存在下,络合物作为手性预催化剂,N,N-二异丙基乙胺作为碱预催化剂。通过原位生成的手性银烯醇化物,以中等至高产率非对映选择性地获得了对映选择性高达 95% ee 的光学活性 α-烷基 β-羟基酮。