Benzoic acid (3R,4S,6S)-4-(tert-butyl-dimethyl-silanyloxy)-2-((1R,2S)-2-carboxy-1,2-dihydroxy-ethyl)-6-furan-2-yl-6-methoxy-tetrahydro-pyran-3-yl ester 在
camphor-10-sulfonic acid 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以100%的产率得到Benzoic acid (1S,2S,3S,5R)-3-(tert-butyl-dimethyl-silanyloxy)-7-((R)-1,2-dihydroxy-ethyl)-5-furan-2-yl-6,8-dioxa-bicyclo[3.2.1]oct-2-yl ester