(10R,11R,1'R)-10,11-bis(methoxymethyl)-5-(8-phenyl-1,2,3,4,-tetrahydro-1-naphthalenyliden-2'-thirrane)-10,11-dihydro-3,7-dibromo-5H-dibenzo[a,d]cycloheptene                                                                                                                                                              在
                                                                                                                                                                                 
三(二甲胺基)膦                                                                                                                                  作用下,
                                                                                                                以
                                                                                         neat (no solvent)                                                                                  为溶剂,
                                                                                                                                                    反应 12.0h,
                                                                                                                以95%的产率得到(10R,11R,R(a))-10,11-bis(methoxymethyl)-5-(8-phenyl-1,2,3,4,-tetrahydro-1-naphthalenylidene)-10,11-dihydro-3,7-dibromo-5H-dibenzo[a,d]cycloheptene