Preparation of optically active α-silylcarbonyl compounds using asymmetric alkylation of α-silylacetic esters and asymmetric metal-carbene insertion into the SiH bond
作者:Yannick Landais、Denis Planchenault
DOI:10.1016/s0040-4020(97)00002-1
日期:1997.2
Substituted α-silylacetic esters have been prepared in good yields and with reasonable diastereoselectivities by three different routes. The first two involved alkylation of the parent α-silylacetic ester enolates, with the chiral auxiliaries being present either on silicon or on the ester function. The third route involving asymmetric insertion of metal-carbenoids into the SiH bond was found to afford
已经通过三种不同的途径以高收率和合理的非对映选择性制备了取代的α-甲硅烷基酯。前两个涉及母体α-甲硅烷基酯烯酸酯的烷基化,其中手性助剂存在于硅或酯官能团上。使用泛内酯作为手性助剂,发现第三种途径涉及将金属类金属化合物不对称地插入SiH键中,从而提供更好的非对映选择性。