Lithium-<i>N</i>-lithiomethyldithiocarbamate: Neue<i>N</i>-Alkylaminomethylanion-Äquivalente II<sup>1</sup>Untersuchungen zur Anwendungsbreite der Methode: Sterisch gehinderte und aromatische<i>N</i>-Methylamine
作者:Hubertus Ahlbrecht、Christine Schmitt、Dieter Kornetzky
DOI:10.1055/s-1991-26532
日期:——
Lithium N-Lithiomethyldithiocarbamates: New N-Alkylaminomethyl Anion Equivalents II1 Investigations on the Scope of the Method: Sterically Hindered and Aromatic N-Methylamines The scope of the methyl deprotonation of secondary methylamines protected as lithiodithiocarbamates has been investigated. Deprotonation is possible with branched N-alkylmethylamines such as the cyclohexyl derivative but failed in the case of N-tert-butylmethylamine. With aromatic methylamines such as N-methylaniline regioselective methyl- as well as ortho-deprotonation is possible depending on the base used.
N-锂甲基二硫代氨基甲酸锂:新的 N-烷基氨基甲基阴离子等价物 II1 方法范围的研究:研究了作为二硫代氨基甲酸锂保护的仲甲胺的甲基去质子化范围。支链 N-烷基甲胺(如环己基衍生物)可以发生去质子化反应,但 N-叔丁基甲胺则不能。对于芳香族甲胺(如 N-甲基苯胺),根据所用碱的不同,可以进行区域选择性甲基和正交去质子化反应。