4-氯苯甲酰氯 、
(4aR,4bS,8R,8aR,10R)-8-(tert-Butyl-dimethyl-silanyloxymethyl)-10-hydroxy-4b,8-dimethyl-4,4a,4b,5,6,7,8,8a,9,10-decahydro-3H-phenanthren-2-one 在
吡啶 作用下,
反应 24.0h,
以3.6 mg的产率得到4-Chloro-benzoic acid (1R,4aS,4bR,9R,10aR)-1-(tert-butyl-dimethyl-silanyloxymethyl)-1,4a-dimethyl-7-oxo-1,2,3,4,4a,4b,5,6,7,9,10,10a-dodecahydro-phenanthren-9-yl ester