tetrafluoroboric acid 、
(Z)-1-(tert-butyl)-2-ethylidene-2',3',4',5',6'-pentamethyl-3,4-diphenyl-1l11,2'l5,3'l5,4'l5,5'l5-spiro[cyclopentane-1,1'-pentacyclo[2.2.0.01,3.01,5.02,6]hexane]-2',3,4'-triene 以
乙醚 为溶剂,
以>99的产率得到(Z)-1-(tert-butyl)-2-ethylidene-2',3',4',5',6'-pentamethyl-3,4-diphenyl-1l11,2'l5,3'l5,4'l5,5'l5-spiro[cyclopentane-1,1'-pentacyclo[2.2.0.01,3.01,5.02,6]hexane]-2',3,4'-triene compound with neopentane (1:1)