4-<2-(4-Iodobutyl)-1,3-dioxolan-2-yl>-1-methylbutyl 2,4-Dimethoxy-6-(phenylthiomethyl)benzoate                                                                                                                                                              在
                                                                                                                                                                                 
sodium hexamethyldisilazane                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 0.5h,
                                                                                                                以85%的产率得到(4'S)-16',18'-dimethoxy-4'-methyl-13'-phenylsulfanylspiro[1,3-dioxolane-2,8'-3-oxabicyclo[12.4.0]octadeca-1(14),15,17-triene]-2'-one