The chemistry of O-silylated ketene acetals; diastereoselective Aldol reaction of 2,3-O-isopropylidene-D (and L)-glyceraldehydes leading to 2-deoxy-D (and L)-riboses
作者:Yasuyuki Kita、Hitoshi Yasuda、Osamu Tamura、Fumio Itoh、Yuan Ke Ya、Yasumitsu Tamura
DOI:10.1016/s0040-4039(00)98924-x
日期:——
Diastereoselective carbon-carbon bond forming reaction of 2,3-O-isopropylidene-D (and L)-glyceraldehydes (D and L-2) with ketene silyl acetals (1a,b) occurred in acetonitrile under mild conditions to give the corresponding anti-β-siloxyesters (D and L-3a) as major products, which could be converted through a few additional steps to 2-deoxy-D(and L)-riboses.
2,3-O-异亚丙基-D(和L)-甘油醛(D和L-2)与乙烯酮甲硅烷基缩醛(1a,b)的非对映选择性碳-碳键形成反应在温和的乙腈中发生,得到相应的抗-β-甲硅烷氧基酯(D和L-3a)为主要产物,可以通过一些额外的步骤将其转化为2-脱氧-D(和L)-核糖。