(2R,3S,5R,6R)-2,3-Diacetoxy-7-(tert-butyl-diphenyl-silanyloxy)-5-hydroxy-6-methyl-heptanoic acid methyl ester 在
camphor-10-sulfonic acid 作用下,
以
苯 为溶剂,
反应 14.0h,
以50%的产率得到(3R,4S,6R)-3,4-diacetoxy-6<(1R)-2-(tert-butyldiphenylsilyloxy)-1-methylethyl>-2H-3,4,5,6-tetrahydropyran-2-one