The Acceleration of the Rearrangement of α-Hydroxy Aldimines by Lewis or Brønsted Acids
作者:William Wulff、Xin Zhang、Yijing Dai
DOI:10.1055/s-0037-1610262
日期:2018.9
α-hydroxy imines. The reaction occurs through an α-iminol rearrangement involving the migration of a substituent of the carbinol carbon to the imine carbon. The optimal catalysts were found to be silica gel or montmorillonite K 10, which effected migration of a variety of aryl and alkyl substituents in high yields. The rearrangement can also be carried out on imines generated in situ from aldehydes and amines
开发了一种从 α-羟基亚胺合成 α-氨基酮的有效方法。该反应通过 α-亚胺醇重排发生,包括甲醇碳的取代基迁移到亚胺碳。发现最佳催化剂是硅胶或蒙脱石 K 10,它们以高产率影响各种芳基和烷基取代基的迁移。重排也可以在由醛和胺原位生成的亚胺上进行,其产率与由预先形成的亚胺的产率基本相同。