丁炔二酸二甲酯 、
(4'R,7'S)-2',2'-dimethyl-4',5',6',7'-tetrahydro-2'H-spiro[cyclopropane-1,8'-[4,7]methanoindene] 以
氯仿 为溶剂,
反应 2.5h,
以21.8%的产率得到dimethyl (1'R,3'R,6'S,8'S)-12',12'-dimethylspiro[cyclopropane-1,11'-tetracyclo[6.2.1.13,6.02,7]dodeca-2(7),4-diene]-4',5'-dicarboxylate