7-[1-(2,4-Dimethyl-phenoxymethyl)-vinyl]-3-methyl-6,9-dihydro-2,5-dioxa-benzocyclohepten-1-one 、
富马酸二甲酯 以
甲苯 为溶剂,
反应 4.0h,
以95%的产率得到(5aS,6S,7S)-9-(2,4-Dimethyl-phenoxymethyl)-2-methyl-4-oxo-5,5a,6,7,8,10-hexahydro-4H-3,11-dioxa-dibenzo[a,d]cycloheptene-6,7-dicarboxylic acid dimethyl ester