methyl 3-oxo-7α-acetoxy-5β-cholan-24-oate   、                                                                                      
对甲苯磺酰肼                                                                                                                                                                                              以
                                                                                         
溶剂黄146                                                                                  为溶剂,
                                                                                                                                                    反应 12.0h,
                                                                                                                以64%的产率得到methyl (4R)-4-[(5S,7R,8R,9S,10S,13R,14S,17R)-7-acetyloxy-10,13-dimethyl-3-[(4-methylphenyl)sulfonylhydrazinylidene]-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]pentanoate