氯仿 、 <29-13C>-(Z)-6β-methoxy-3α,5-cyclo-5α-stigmast-24(28)-ene 在
sodium hydroxide 、
苄基三乙基氯化铵 作用下,
反应 16.0h,
生成 <29-
13C>-(24S,28S)-24,28-(dichloromethylene)-6β-methoxy-3α,5-cyclo-5α-stigmastane 、 <29-
13C>-(24S,28R)-24,28-(dichloromethylene)-6β-methoxy-3α,5-cyclo-5α-stigmastane 、
<29-13C>-(24R,28S)-24,28-(dichloromethylene)-6β-methoxy-3α,5-cyclo-5α-stigmastane 、 <29-
13C>-(24R,28R)-24,28-(dichloromethylene)-6β-methoxy-3α,5-cyclo-5α-stigmastane