3,5-二溴水杨醛 、 1,1,3,8,10,10-hexamethyl-2,9-dimethylidene-1,2,3,8,9,10-hexahydroindolo[4,5-e]indole 以
乙醇 为溶剂,
反应 1.0h,
以28%的产率得到6,6'',8,8''-tetrabromo-1',1',3',8',10',10'-hexamethyl-1',2',3',8',9',10'-hexahydro-dispiro[chromene-2,2'-indolo[4,5-e]indole-9',2''-chromene]