乙酸酐 、
(4E,8E)-(1S,2S,12R,13S)-12-(tert-Butyl-dimethyl-silanyloxy)-2-hydroxy-4,8,12-trimethyl-14-oxa-bicyclo[11.3.1]heptadeca-4,8-dien-16-one 在
4-二甲氨基吡啶 、
sodium acetate 作用下,
以
氯仿 为溶剂,
以70%的产率得到Acetic acid (4E,8E)-(1S,2S,12R,13S)-12-(tert-butyl-dimethyl-silanyloxy)-4,8,12-trimethyl-16-oxo-14-oxa-bicyclo[11.3.1]heptadeca-4,8-dien-2-yl ester