Lewis Acid-Activated Chiral Leaving Group: Enantioselective Electrophilic Addition to Prochiral Olefins
作者:Hiroko Nakamura、Kazuaki Ishihara、Hisashi Yamamoto
DOI:10.1021/jo020165l
日期:2002.7.1
A new strategy using a BINOL derivative as a chiral leaving group and Lewis acid has been developed for enantioselective alkylation of prochiral olefins. (R)-2,2'-Bis[2-(trimethylsilyl)ethoxymethyl]-1,1'-binaphthol is demonstrated to be an effective reagent for enantioselective hydroxymethylation of silyl enol ethers and trisubstituted alkenes. Electrophilic addition to prochiral olefins is accompanied
已经开发了一种使用BINOL衍生物作为手性离去基团和路易斯酸的新策略,用于前手性烯烃的对映选择性烷基化。已证明(R)-2,2′-双[2-(三甲基甲硅烷基)乙氧基甲基] -1,1′-联苯酚是用于甲硅烷基烯醇醚和三取代烯烃的对映选择性羟甲基化的有效试剂。前手性烯烃的亲电加成伴随着乙缩醛的裂解,该缩醛被SnCl4双重激活,并且硅通过S(N)2取代过程产生了δ效应。使用该策略还描述了环状萜烯的对映选择性合成。