Diastereo- and enantioselective reduction of α,β-diketodithiane with the baker's yeast
作者:Tamotsu Fujisawa、Eiji Kojima、Toshiyuki Itoh、Toshio Sato
DOI:10.1016/s0040-4039(00)95133-5
日期:——
The Baker's yeast reduction of 1-(1,3-dithian-2-yl)-1,2-propanedione gave highly enantio-and diastereoselectively (S)-(+)-(1-1,3-dithian-2-yl)-2-hydroxy-1-propanone or (1S,23-(+)-(1)-(1,3-dithian-2-yl-1,2-propanediol, depending on the reaction time. The hydroxy ketone was reduced with diisobutylaluminum hydride to give (1R,2S)-1-(1,3-dithian-2-yl)-1,2-propanediol with high diastereoselectivity. The
贝克的1-(1,3-二噻-2-基)-1,2-丙二酮酵母还原反应得到高度对映体和非对映选择性的(S)-(+)-(1-1,3-二噻二-2-基) )-2-羟基-1-丙酮或(1S,23-(+)-(1)-(1,3-二噻-2--2-基-1,2-丙二醇),取决于反应时间。用二异丁基氢化铝还原,得到非对映选择性高的(1R,2S)-1-(1,3-二硫-2-基)-1,2-丙二醇,将前一个(1S,2S)-二醇转化为L-数字氧糖。