ethyl 3-[(3S,3aS,5aS,6R,7R,8R,9aS,9bS)-3,8-bis[[tert-butyl(dimethyl)silyl]oxy]-6-(1,3-dithian-2-ylmethyl)-7-hydroxy-3a,6-dimethyl-1,2,3,4,5,5a,8,9,9a,9b-decahydrocyclopenta[a]naphthalen-7-yl]propanoate                                                                                                                                                              在
                                                                                                                                                                                 
potassium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇   、                                                                                         
水                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以91%的产率得到(3S,3aS,5aS,6R,7R,8R,9aS,9bS)-3,8-bis[[tert-butyl(dimethyl)silyl]oxy]-6-(1,3-dithian-2-ylmethyl)-3a,6-dimethylspiro[1,2,3,4,5,5a,8,9,9a,9b-decahydrocyclopenta[a]naphthalene-7,5'-oxolane]-2'-one