2-[(3R,4S,5S,8S,9S,10S,11R,13R,14S,16R)-3-Acetoxy-16-bromo-11-hydroxy-4,8,10,14-tetramethyl-hexadecahydro-cyclopenta[a]phenanthren-(17Z)-ylidene]-6-methyl-heptanoic acid 4-nitro-benzyl ester 在
氢氧化钾 、 Py*HClCrO
3 作用下,
以
乙醇 、
二氯甲烷 为溶剂,
生成
2-[(3R,4S,5S,8S,9S,10S,13R,14S,16S)-3-Acetoxy-16-isopropylsulfanyl-4,8,10,14-tetramethyl-11-oxo-hexadecahydro-cyclopenta[a]phenanthren-(17Z)-ylidene]-6-methyl-hept-5-enoic acid 4-nitro-benzyl ester