Lewis Acid-Promoted Reaction of β,β-Difluorinated<i>N</i>,<i>O</i>-Acetal with Silylated Nucleophiles
作者:Takashi Tsukamoto、Tomoya Kitazume
DOI:10.1246/cl.1992.1377
日期:1992.7
Lewis acid-promoted reaction of ethyl 3-ethoxy-2,2-difluoro-3-(dimethylamino)propionate (1) with some silylated nucleophiles afforded β,β-difluoroamines in good yields. The formation of iminium ion intermediate from 1 and BF3·OEt2 was confirmed by 19F and 13C NMR spectroscopy.
在路易斯酸的促进下,3-乙氧基-2,2-二氟-3-(二甲基氨基)丙酸乙酯(1)与一些硅烷化的亲核物发生反应,生成了β,β-二氟化胺,产率很高。19F 和 13C NMR 光谱证实了由 1 和 BF3-OEt2 生成的亚氨基离子中间体。