Direct N-alkylation of amines with alcohols was successfully performed by using nanosized zeolite beta, which showed the highest catalytic activity among other conventional zeolites. This method has several advantages, such as eco-friendliness, moderate to high yields, and simple work-up procedure. The catalyst was successfully recovered and reused without significant loss of activity and only water is produced as co-product. In addition, imines were also efficiently prepared from the tandem reactions of amines with 2-, 3- and 4-nitrobenzyl alcohols using nanosized zeolite beta.
使用纳米尺寸的Beta
沸石成功实现了胺与醇的直接N-烷基化反应,Beta
沸石在其他传统
沸石中显示出最高的催化活性。该方法具有多个优点,如环保性、适中至高产率以及简便的后续处理程序。催化剂可成功回收并重复使用,活性无明显损失,副产物仅为
水。此外,通过使用纳米尺寸的Beta
沸石,胺与2-、3-和
4-硝基苄醇的串联反应也能高效制备
亚胺。