(+/-)-methyl 5,6-O,O-isopropylidinecyclohexa-1,3-diene-2-carboxylate 、
苯硫酚 在
sodium hydride 作用下,
生成
methyl 2β,6β-diphenylthio-3α,4α-isopropylidenedioxycyclohexan-1β-oate 、 methyl 4α,5α-isopropylidenedioxy-6α-phenylthiocyclohexenoate 、 methyl 4α,5α-isopropylidenedioxy-6β-phenylthiocyclohexenoate