Abstract
Abstract It has been considered that, in the reaction of α-bromo-α, β-unsaturated ketones with amines, α-bromo-β-amino ketones are produced first by the 1,4-addition of amines and converted to ethylenimine ketones in the presence of excess amines. The ethylenimine ketones react with hydrogen chloride to give α-chloro-β-amino and β-chloro-α-amino ketones, the yields of these ketones depending on the variation of the fractional positive charge at the α-carbon atom and on the delocalization energy on the β-carbon atom by R′.
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