ENANTIOSELECTIVE SYNTHESIS OF α-HYDROXYTHIOACETALS BY THE BAKER’S YEAST REDUCTION OF α-KETOTHIOACETALS
作者:Tamotsu Fujisawa、Eiji Kojima、Toshiyuki Itoh、Toshio Sato
DOI:10.1246/cl.1985.1751
日期:1985.11.5
Asymmetric reduction of a-ketothioacetals was achieved by fermenting baker’s yeast to afford optically pure α-hydroxythioacetals which play as equivalents of valuable α-hydroxy aldehydes. The utility of the present method was demonstrated in the stereo-selective syntheses of (4S,5S)- and (4S,5R)-4,5-dihydroxydecanoic acid γ-lactones from (S)-(−)-1-(1,3-dithian-2-yl)-1,4-butanediol.
α-酮硫缩醛的不对称还原是通过发酵面包酵母来实现的,得到光学纯的 α-羟基硫缩醛,它相当于有价值的 α-羟基醛。本方法的效用在 (4S,5S)- 和 (4S,5R)-4,5-二羟基癸酸 γ-内酯的立体选择性合成中得到了证明 (S)-(-)-1-(1 ,3-dithian-2-yl)-1,4-丁二醇。