Terminal alkenes, R–CH=CH2 (R=Et, n-Pr, n-Bu, n-Hex), were readily transformed into 1-chloro-3-iodoalkanes by the AIBN-induced free radical addition of chloroiodomethane. Thus, 1-chloro-3-iodoheptane was obtained from 1-hexene in an 88% yield; this in turn was allowed to react with dialkyl malonates in the presence of alkoxides in alcohols to give dialkyl 2-butylcyclobutane-1,1-dicarboxylates and dialkyl
通过 AIBN 诱导的
氯碘甲烷自由基加成,末端烯烃 R–CH=
CH2(R=Et、n-Pr、n-Bu、n-Hex)很容易转化为 1-chloro-3-iodoalkanes。因此,1-
氯-
3-碘庚烷以88%的产率从
1-己烯得到;在醇中的醇盐存在下,这又使其与
丙二酸二烷基酯反应,得到 2-丁基
环丁烷-1,1-二
羧酸二烷基酯和 (E)-3-
辛烯-1,1-二
羧酸二烷基酯 (7),可以通过选择实验参数优先获得。烯烃产物7进一步用于合成(E)-
5-癸烯乙酸酯和/或1,4-壬内酯。