1-((1S,2S,4aS,4bR,6R,8R,8aS,10S,10aS)-10-(tert-butyldimethylsilyloxy)-1-(2-hydroxyethyl)-3-methoxy-1,2,4a,6-tetramethyl-8-(triethylsilyloxy)-1,2,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydrophenanthren-2-yl)ethanone   、                                                                                      
叔丁基二甲基氯硅烷                                                                                                                                                              在
                                                                                                                                                                                 
4-二甲氨基吡啶   、                                                                                                  
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以103.3 mg的产率得到1-((1S,2S,4aS,4bR,6R,8R,8aS,10S,10aS)-10-(tert-butyldimethylsilyloxy)-1-(2-(tert-butyldimethylsilyloxy)ethyl)-3-methoxy-1,2,4a,6-tetramethyl-8-(triethylsilyloxy)-1,2,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydrophenanthren-2-yl)ethanone