BF<sub>3</sub>-Promoted Aromatic Substitution of<i>N</i>-Alkyl<i>α</i>-Trifluoromethylated Imine: Facile Synthesis of 1-Aryl-2,2,2-trifluoroethylamines
作者:Yuefa Gong、Katsuya Kato、Hiroshi Kimoto
DOI:10.1246/bcsj.75.2637
日期:2002.12
The aromatic substitution of three representative N-alkyl trifluoromethyl imines 1a–c (R: a, benzyl; b, benzhydryl; c, methyl), obtained from primary alkyl amines and trifluoroacetaldehyde ethyl hemiacetal, was used to investigate the preparation of 1-aryl-2,2,2-trifluoroethylamines. In the presence of BF3·OEt2, the reaction of imine 1 with various aromatic compounds proceeded smoothly at room temperature
从伯烷基胺和三氟乙醛乙基半缩醛中获得的三种代表性 N-烷基三氟甲基亚胺 1a-c(R:a,苄基;b,二苯甲基;c,甲基)的芳族取代用于研究 1-芳基的制备-2,2,2-三氟乙胺。在BF3·OEt2的存在下,亚胺1与各种芳香族化合物在室温下反应顺利进行,得到了中高产率的N-烷基-1-芳基-2,2,2-三氟乙胺。此外,通过在盐酸中水解或通过钯催化的氢解,成功地区域选择性去除 N-苄基和 N-二苯甲基。