(12Z,16E)-(3S,8S,15S)-7-(tert-Butyl-dimethyl-silanyloxy)-15-hydroxy-3-(4-methoxy-benzyloxy)-4,4,6,8,16-pentamethyl-17-(2-methyl-thiazol-4-yl)-5-oxo-heptadeca-12,16-dienoic acid 在
4-二甲氨基吡啶 、
三乙胺 作用下,
以
四氢呋喃 、
甲苯 为溶剂,
反应 1.25h,
生成
(Z)-(4S,7R,8S,9S,16S)-8-(tert-Butyl-dimethyl-silanyloxy)-4-(4-methoxy-benzyloxy)-5,5,7,9-tetramethyl-16-[(E)-1-methyl-2-(2-methyl-thiazol-4-yl)-vinyl]-oxacyclohexadec-13-ene-2,6-dione