The allylic halogenation of methyl 3-methylbut-2-enoate
Abstract
N-Bromosuccinimide, 1,3-dibromo-5,5-dimethylhydantoin, and t-butyl hypochlorite react with methyl 3-methyl-but-2-enoate in the presence of a radical initiator to give a mixture of the corresponding methyl cis- and trans-4-halogeno-3-methylbut-2-enoate.