(5S,8R,9S,10S,13S,14S,17S)-2-[1-Diethylamino-meth-(E)-ylidene]-17-hydroxy-10,13,17-trimethyl-hexadecahydro-cyclopenta[a]phenanthren-3-one                                                                                                                                                              在
                                                                                                                                                                                 
1,8-二氮杂双环[5.4.0]十一碳-7-烯   、                                                                                                  
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                生成                                                 
(5α,17β)-5'-chloro-4'-(diethylamino)-17-(dichloroacetyloxy)-17-methyl-6'-H-androst-2-eno<3,2-b>pyran-6'-one