(4E)-(1R,3R,5R)-1-acetoxy-3-[(tert-butyldimethylsilyl)oxy]-6-oxa-4-[3'-(p-toluenesulfonyloxy)propylidene]bicyclo[3.2.1]octan-7-one 在
sodium tetrahydroborate 作用下,
以
乙醇 为溶剂,
反应 38.0h,
以79%的产率得到(5R,7R,8aR)-5-[(tert-butyldimethylsilyl)oxy]-7-hydroxymethyl-3,5,6,7,8,8a-hexahydro-2H-chromen-7-ol