Reduction of nitrobenzene derivatives using sodium borohydride and transition metal sulfides
作者:Samuel Piña、Diana M. Cedillo、Carlos Tamez、Nezhueyotl Izquierdo、Jason G. Parsons、Jose J. Gutierrez
DOI:10.1016/j.tetlet.2014.08.068
日期:2014.10
effect on the reduction of nitrobenzene while the reduction using CuS showed a marginal increase. The reduction method was applied to several aryl-nitro derivatives containing either electron-withdrawing or electron-donating groups. Halogen containing aryl-nitro compounds were reduced without dehalogenation. The reduction had no effect on other functional groups such as carboxylic acids, esters, amides
此处报道的是使用硼氢化钠和过渡金属硫化物作为催化剂还原芳香族硝基化合物。使用还原硝基苯作为模型反应来优化反应条件。研究的催化剂为硫化铁(Fe 3 S 4),硫化铜(CuS),硫化锌(ZnS),硫化钴(Co 3 S 4)和硫化镍(NiS)。使用气相色谱监测还原。使用Co 3 S 4和NiS可以实现定量转化,与非催化反应相比,反应性提高了十倍。铁3 S 4ZnS对硝基苯的还原没有明显影响,而CuS对硝基苯的还原则显示出一定程度的增加。还原方法应用于含有吸电子基团或供电子基团的几种芳基硝基衍生物。含卤素的芳基硝基化合物被还原而不脱卤。还原对其他官能团如羧酸,酯,酰胺或烯烃没有影响,表明该还原是高度化学选择性的。