、
methyl 4,6,6-trichloro-3,3-dimethyl-5-hexenoate 、
3,3-Dimethyl-6,6,6-trichlor-4-hexensaeure-methylester 在
37.9 作用下,
以to obtain 37.9 parts of methyl 2,2-dimethyl-3-(2',2'-dichlorovinyl) cyclopropanecarboxylate (yield 85% based on starting material; cis/trans ratio=29:71) and 4.6 parts of 3,3-dimethyl-4-(2',2'-dichlorovinyl)-4-butanolide (yield 11% based on starting material)的产率得到