反应详情

The above procedure was repeated except that 27.4 parts of ethyl 3,3-dimethyl-4,6,6-trichloro-5-hexenoate was used in lieu of methyl 3,3-dimethyl-4,6,6-trichloro-5-hexenoate. In this case, 19.8 parts of 3,3-dimethyl-4-(2',2'-dichlorovinyl)-4-butanolide was obtained (yield 95%).