 For instance, in the presence of a copper(II) catalyst, bulky organozinc reagents react with "O"-acylhydroxylamines to afford hindered amines.Allylic metal species can be used to prepare allylic amines through electrophilic amination.Although allylic amines are usually prepared through nucleophilic amination of allylic halides, a few examples of electrophlic amination of allylic substrates are known.