(3S,5aR,6S,8S)-3,6-dimethyl-8-(2-methylprop-1-en-1-yl)-4,5,5a,6,7,8-hexahydrocyclohepta[cd]isobenzofuran-9(3H)-one                                                                                                                                                              在
                                                                                                                                                                                 
1,8-二氮杂双环[5.4.0]十一碳-7-烯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 48.0h,
                                                                                                                以100%的产率得到(3S,5aR,6S,8R)-3,6-dimethyl-8-(2-methylprop-1-en-1-yl)-4,5,5a,6,7,8-hexahydrocyclohepta[cd]isobenzofuran-9(3H)-one