cis-4a-cisoid-4a,4b-trans-4b-(tert-butyldimethylsilyloxy)-1,4,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydro-2,4b-dimethyl-10-oxophenanthrene-10a-carbaldehyde                                                                                                                                                              在
                                                                                                                                                                                 
sodium ethanolate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 0.08h,
                                                                                                                以73%的产率得到cis-4a-cisoid-4a,4b-trans-4b-3-(tert-butyldimethylsilyloxy)-1,4,4a,4b,5,6,7,8,8a,10,10a-dodecahydro-2,4b-dimethylphenanthrene-10-one