17β-[(N,N-dimethylcarbamoyl)thio]carbonyl-9,11-epoxy-17α-[(2-furanylcarbonyl)oxy]-16α-methyl-3-oxoandrosta-1,4-diene 在
甲醇 、
potassium carbonate 作用下,
反应 5.0h,
以83%的产率得到9,11-epoxy-17α-[(2-furanylcarbonyl)oxy]-17α-hydroxy-16α-methyl-3-oxoandrosta-1,4-diene-17β-carbothioic acid