Preparation of novel β-trifluoromethyl vinamidinium salt and its synthetic application to trifluoromethylated heterocycles
作者:Hiroki Yamanaka、Ta-i Takekawa、Kenji Morita、Takashi Ishihara、John T. Gupton
DOI:10.1016/0040-4039(96)00129-3
日期:1996.3
β-Trifluoromethylated vinamidinium salt (1) was prepared in high yield by the reaction between 3,3,3-trifluoropropanoic acid and phosphorus oxychloride in N,N-dimethylformamide at 70 °C for 1 h. This salt 1 reacted readily with bifunctional nitrogen nucleophiles, such as amidine and hydrazine derivatives, in acetonitrile or dimethyl sulfoxide to furnish the corresponding trifluoromethylated azaheterocycles
3,3,3-三氟丙酸与三氯氧磷在N,N-二甲基甲酰胺中于70°C反应1 h ,可以高收率制备β-三氟甲基化的ami胺盐(1)。该盐1容易在乙腈或二甲基亚砜中与双官能氮亲核试剂如am和肼衍生物反应,以高收率提供相应的三氟甲基化氮杂杂环。