(1-methyl-2-oxo-1,2-dihydropyridin-3-yl)methyl methanesulfonate 、
acetic acid 2-((4aS,4bR,5S,6aS,6bR,9aS,10aS,10bS,12S)-4b,12-difluoro-5-hydroxy-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,8,9,9a,10,10a,10b,11,12-tetradecahydro-7-oxa-8-aza-pentaleno[2,1-a]phenanthren-6b-yl)-2-oxo-ethyl ester 在
N,N-二异丙基乙胺 、 sodium iodide 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 3.0h,
以46%的产率得到acetic acid 2-((4aS,4bR,5S,6aS,6bR,9aS,10aS,10bS,12S)-4b,12-difluoro-5-hydroxy-4a,6a-dimethyl-2-oxo-1692,4a,4b,5,6,6a,8,9,9a,10,10a,10b,11,12-tetradecahydro-7-oxa-8-N-(1-methyl-2-oxo-1,2-dihydro-pyridin-3-ylmethyl)-aza-pentaleno[2,1-a]phenanthren-6b-yl)-2-oxo-ethylester