可的松 、
5-norbornene-endo-2-carbonyl chloride 在
吡啶 作用下,
反应 0.5h,
以50%的产率得到[2-[(8S,9S,10R,13S,14S,17R)-17-hydroxy-10,13-dimethyl-3,11-dioxo-1,2,6,7,8,9,12,14,15,16-decahydrocyclopenta[a]phenanthren-17-yl]-2-oxoethyl] bicyclo[2.2.1]hept-5-ene-2-carboxylate