ethyl 2-[(1'S,4'aS,8'aS)-1',4'a-dimethyl-2'-methylidenespiro[1,3-dioxolane-2,5'-3,4,6,7,8,8a-hexahydronaphthalene]-1'-yl]acetate                                                                                                                                                              在
                                                                                                                                         Rh on carbon                                                                                                                                                                                                                               
氢气                                                                                                                                  作用下,
                                                                                                                                                                                                                            以80%的产率得到ethyl 2-((4aS,5R,6R,8aS)-5,6,8a-trimethyloctahydro-2H-spiro[naphthalene-1,2'-[1,3]dioxolan]-5-yl)acetate