Allylation of N-Benzoylhydrazones (=N′-Alkylidene-Substituted Benzohydrazides) by Treatment with Allyl Bromide in the Presence of Zinc in Aqueous Ammonium Chloride Solution
N‐Benzoylhydrazones (=N′‐alkylidene‐substituted benzohydrazides) 1 are allylated efficiently by reaction with allyl bromide (2) in the presence of Zn in aqueous NH4Cl solution. The products 3 are formed in excellent yields (85–94%) within 35–50 min (Scheme, Table).
Ñ -Benzoylhydrazones(= N' -亚烷基-取代的benzohydrazides)1是由用烯丙基溴(反应有效地烯丙基化2中的Zn的在含水NH存在下)4 Cl溶液。产品3在35-50分钟内以优异的产率(85-94%)形成(方案,表)。