反-1-甲氧基-3-(三甲基硅氧基)-1,3-丁二烯 、
(2S,2'S,5'R)-4-oxo-5-trifluoromethyl-4H-1,3-dioxine-2-spiro(2'-isopropyl-5'-methyl)cyclohexane 在
potassium fluoride 作用下,
生成 (1S,2'S,3S,5'R,6S,7R)-7-methoxy-5,9-dioxo-6-trifluoromethyl-2,4-dioxabicyclo<4.4.0>decane-3-spiro(2'-isopropyl-5'-methyl)cyclohexane