A practical approach to non-natural or N-unsubstituted α-arylglycine derivatives: Hf(OTf)4-doped Me3SiCl system-catalyzed aminomethylation of electron-rich arenes with a new type of N,O-acetal
作者:Norio Sakai、Junichi Asano、Yuta Shimano、Takeo Konakahara
DOI:10.1016/j.tet.2008.07.052
日期:2008.9
demonstrated the Hf(OTf)4-doped Me3SiCl system-catalyzed aminomethylation of electron-rich aromatic compounds, such as indoles and anilines, with new types of N,O-acetals having a variety of functional groups, such as cyano, ester, bis(trimethylsilyl)amino, diallylamino, and cyclic amino moieties, for the preparation of non-natural aromatic amino acid derivatives. Aminomethylation using an N,O-acetal with a
作者已经证明了Hf(OTf)4掺杂的Me 3 SiCl系统催化的富电子芳族化合物(如吲哚和苯胺)的氨甲基化,以及具有各种官能团的新型N,O-乙缩醛,如氰基,酯,双(三甲基甲硅烷基)氨基,二烯丙基氨基和环状氨基部分,用于制备非天然芳香族氨基酸衍生物。在直接制备N-未取代的α-吲哚基甘氨酸衍生物的过程中,使用N,O-乙缩醛与双(三甲基甲硅烷基)氨基的氨基甲基化特别成功,该过程仅需进行标准的水性处理即可。