<1aS-(1aα,1bβ,5α,5aβ,6aα)> 1a,1b,2,3,5,5a,6,6a-octahydro-1b,5-dimethyl-6a-(1-methylethyl)cycloprop<α>inden-4(1H)-one 、
碘甲烷 在
potassium tert-butylate 作用下,
生成
<1aS-(1aα,1bβ,5aβ,6aα)> 1a,1b,2,3,5,5a,6,6a-octahydro-1b,5,5-trimethyl-6a-(1-methylethyl)cycloprop<α>inden-4(1H)-one