(8R,9S,13S,14S)-3-Methoxy-13-methyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-16-carboxylic acid allyl ester 在
o,o,p-MeC
5H
2NF
(1+)*OTf
(1-) 、 sodium hydride 作用下,
以
四氢呋喃 为溶剂,
以78%的产率得到(8R,9S,13S,14S)-16-Fluoro-3-methoxy-13-methyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-16-carboxylic acid allyl ester