(2R,3S,4R,5S,6R)-2,3-Diacetoxy-7-(tert-butyl-diphenyl-silanyloxy)-5-hydroxy-4,6-dimethyl-heptanoic acid methyl ester 在
camphor-10-sulfonic acid 作用下,
以
苯 为溶剂,
反应 0.17h,
以58%的产率得到(3R,4S,5R,6S)-3,4-diacetoxy-6<(1R)-2-(tert-butyldiphenylsilyloxy)-1-methylethyl>-5-methyl-2H-3,4,5,6-tetrahydropyran-2-one