α-Bromo- and α-chloroaldimines 1 are easily converted into α-azidoaldimines 2 which are reduced by lithium aluminum hydride to afford N-monoalkylated 1,2-diamines 3. In a similar way, aromatic α-bromoketimines 7 are transformed into the corresponding α-azidoketimines 8 and α-monoalkylated 1,2-diamines 9. The 1,2-diamines, thus obtained, are converted into 2-imidazolidinones 4, 10 and 2-imidazolidinethiones 5, 11.
δ-
溴和δ-
氯醛酸
亚胺 1 很容易转化成δ-
叠氮醛酸
亚胺 2,后者经
氢化铝锂还原后得到 N-单烷基化的 1,2-二胺 3。同样,芳香族 δ±-
溴酮
亚胺 7 也可转化为相应的δ-
叠氮酮
亚胺 8 和δ-单烷基化 1,2-二胺 9。由此得到的 1,2-二胺可转化为
2-咪唑烷酮 4、10 和
2-咪唑烷硫酮 5、11。