4-溴-1-丁烯   、                                                                                      (1S)-1-[(1S,3R,10R,13S,14R,17S)-1,3-bis[[tert-butyl(dimethyl)silyl]oxy]-10,13-dimethyl-2,3,4,9,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-17-yl]ethanol                                                                                                                                                              在
                                                                                                                                                                                 
4-溴-1-丁烯                                                                                                                                  作用下,
                                                                                                                                                                                                                            以86的产率得到Silane, [[(1I+/-,3I(2),20S)-20-(3-butenyloxy)pregna-5,7-diene-1,3-diyl]bis(oxy)]bis[(1,1-dimethylethyl)dimethyl-