1-甲基环丁烯 、
1'(R),6-Dimethyl-4'(S)-isopropyl-4-oxospiro--dioxin> 以
正己烷 为溶剂,
生成 、 、 (1S,1'S,2S,2'R,5R,5'S,6'R)-2-isopropyl-2',5,6'-trimethyl-7',9'-dioxaspiro[cyclohexane-1,8'-tricyclo[4.4.0.02,5]decan]-10'-one 、
(1S,1'S,2S,2'R,5R,5'S,6'R)-2-isopropyl-2',5,6'-trimethyl-7',9'-dioxaspiro[cyclohexane-1,8'-tricyclo[4.4.0.02,5]decan]-10'-one