三光气 、
(Z)-7-[(1S,2R,3S,5R)-2-(tert-Butyl-diphenyl-silanyloxymethyl)-3,5-dihydroxy-cyclopentyl]-hept-5-enoic acid methyl ester 在
吡啶 作用下,
以
二氯甲烷 为溶剂,
以85%的产率得到(Z)-7-[(1S,5R,6S,7R)-7-(tert-Butyl-diphenyl-silanyloxymethyl)-3-oxo-2,4-dioxa-bicyclo[3.2.1]oct-6-yl]-hept-5-enoic acid methyl ester