乙酸酐 、
Acetic acid (1R,2R,3R,4S,5R)-4-acetoxy-2-(tert-butyl-diphenyl-silanyloxy)-6,8-dioxa-bicyclo[3.2.1]oct-3-yl ester 在
三乙基硅基三氟甲磺酸酯 作用下,
以95%的产率得到Acetic acid (2R,3S,4R,5R,6R)-2,3-diacetoxy-6-acetoxymethyl-5-(tert-butyl-diphenyl-silanyloxy)-tetrahydro-pyran-4-yl ester