(((2S,4S,5'R,6aR,6bS,8aS,8bR,9S,10R,11aS,12aS,12bR)-2-(allyloxy)-5',6a,8a,9-tetramethyldocosahydrospiro[naphtho[2',1':4,5]indeno[2,1-b]furan-10,2'-pyran]-4-yl)oxy)(tert-butyl)diphenylsilane                                                                                                                                                              在
                                                                                                                                                                                 perchloric acid on silica gel                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 0.5h,
                                                                                                                以89%的产率得到(2S,4S,5'R,6aR,6bS,8aS,8bR,9S,10R,11aS,12aS,12bR)-2-(allyloxy)-5',6a,8a,9-tetramethyldocosahydrospiro[naphtho[2',1':4,5]indeno[2,1-b]furan-10,2'-pyran]-4-ol