A General, Facile, and Safe Procedure for the Preparation of <i>S</i>-Methyl <i>N</i>-Alkylthiocarbamates by Methylthiocarbonylation of Primary Aliphatic Amines with <i>S</i>,<i>S</i>-Dimethyl Dithiocarbonate
作者:Rita Fochi、Emma Artuso、Gianni Carvoli、Iacopo Degani、Claudio Magistris
DOI:10.1055/s-2007-965943
日期:2007.4
A general procedure is reported for the selective preparation of S-methyl N-alkylthiocarbamates by methylthiocarbonylation of primary aliphatic amines, employing S,S-dimethyl dithiocarbonate as a phosgene substitute. The reactions are carried out in water at room temperature (20-25 °C), with S,S-dimethyl dithiocarbonate/amine ratios varying between 1:1.2 and 1:2, and with quantitative recovery of the excess amine. The target products are obtained in exceptionally high yields (generally >95%) and with very high purity (generally >99.5%). Also to be noted is the complete chemoselectivity of the reactions, which can be carried out in the presence of hydroxy or aminophenyl groups.
报告了一种利用 S,S-二硫代碳酸二甲酯作为光气替代物,通过伯胺脂肪族胺的甲基硫代羰基化选择性制备 S-甲基 N-烷基硫代氨基甲酸酯的一般程序。反应在室温(20-25 °C)的水中进行,S,S-二硫代碳酸二甲酯/胺的比例在 1:1.2 和 1:2 之间变化,并可定量回收过量的胺。目标产物的收率极高(一般大于 95%),纯度极高(一般大于 99.5%)。另外值得注意的是,反应具有完全的化学选择性,可以在羟基或氨基苯基存在的情况下进行。