3-[(S)-2-((1aR,3aR,3bS,5aS,6R,8aS,8bS,10R,10aR)-10-Methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-propyl]-1,1-dimethyl-urea 在
对甲苯磺酸 作用下,
以
1,4-二氧六环 为溶剂,
以80%的产率得到3-[(S)-2-((3S,8S,9S,10R,13S,14S,17R)-3-Hydroxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-propyl]-1,1-dimethyl-urea