2-噻吩甲酰氯 、
9α-fluoro-17α,21-dihydroxy-16α-methyl-1,4-pregnadiene-3,11,20-trione 21-acetate 在
4-二甲氨基吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 72.0h,
以39%的产率得到Thiophene-2-carboxylic acid (8S,9R,10S,13S,14S,16R,17R)-17-(2-acetoxy-acetyl)-9-fluoro-10,13,16-trimethyl-3,11-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl ester