Metal organic frameworks as heterogeneous catalysts for the selective N-methylation of aromatic primary amines with dimethyl carbonate
作者:Amarajothi Dhakshinamoorthy、Mercedes Alvaro、Hermenegildo Garcia
DOI:10.1016/j.apcata.2010.01.042
日期:2010.4.15
polymethylation of aromatic amines with dimethyl carbonate (DMC). N-methylation prevails over carbamoylation even though they are competing parallel processes. The present N-methylation protocol using DMC enjoys advantages such as convenient reaction conditions, benign, reusable, cost-effective catalyst, avoids the use of additional solvent and uses a safe, green methylating agent that only produces CO2 and methanol
以铝,铜和铁为中心金属原子并以1,4-苯二甲酸(铝)和1,3,5-苯三甲酸(铜和铁)为配体的金属有机骨架(MOF)是选择性和活性的催化剂芳香胺与碳酸二甲酯(DMC)的多甲基化。N-甲基化比氨基甲酰基化更重要,即使它们竞争并行过程。当前使用DMC进行的N-甲基化方案具有以下优点:反应条件便利,温和,可重复使用,具有成本效益的催化剂,避免使用额外的溶剂并使用安全的绿色甲基化剂,仅产生CO 2和甲醇作为副产物。