Benzoic acid (3S,3aS,6aR,7aR,11R,11aS,11bS,11cS)-11-(tert-butyl-dimethyl-silanyloxy)-5-ethoxy-3,11a-dimethyl-2-oxo-tetradecahydro-6-oxa-benzo[de]anthracen-11c-ylmethyl ester 在
吡啶 、
甲醇 、
potassium carbonate 作用下,
以
四氢呋喃 、
二氯甲烷 为溶剂,
反应 42.0h,
生成
Thiocarbonic acid O-[(3S,3aS,6aR,7aR,11R,11aS,11bS,11cS)-11-(tert-butyl-dimethyl-silanyloxy)-5-ethoxy-3,11a-dimethyl-2-oxo-tetradecahydro-6-oxa-benzo[de]anthracen-11c-ylmethyl] ester O-phenyl ester