2- and 4-Nitrobenzenesulfonamides: Exceptionally versatile means for preparation of secondary amines and protection of amines
作者:Tohru Fukuyama、Chung-Kuang Jow、Mui Cheung
DOI:10.1016/0040-4039(95)01316-a
日期:1995.9
4-Nitrobenzenesulfonamides, readily prepared from primary amines, undergo smooth alkylation by Mitsunobu reaction or by conventional methods to give N-alkylated sulfonamides in near quantitative yields. These sulfonamides could be deprotected readily via Meisenheimer complexes upon treatment with thiolates in DMF at room temperature, giving secondary amines in high yields.
由伯胺容易制备的2-和4-硝基苯磺酰胺通过Mitsunobu反应或通过常规方法进行平滑烷基化,以接近定量的产率得到N-烷基化磺酰胺。这些磺酰胺在室温下在DMF中用硫醇盐处理后,可以很容易地通过Meisenheimer配合物脱保护,从而以高收率得到仲胺。