(E)-3-(6-{(1S,2R)-2-(tert-Butyl-dimethyl-silanyloxy)-6-[2-trimethylsilanyl-eth-(E)-ylidene]-cyclohexyl}-benzo[1,3]dioxol-5-yl)-acrylic acid ethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
四丁基氟化铵                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                以65%的产率得到((4bS,5R,8aS,9R)-5-Hydroxy-8a-vinyl-5,6,7,8,8a,9-hexahydro-4bH-1,3-dioxa-cyclopenta[b]fluoren-9-yl)-acetic acid ethyl ester