Synthesis of benzamides through direct condensation of carboxylic acids and amines in the presence of diatomite earth@IL/ZrCl4 under ultrasonic irradiation
condensation of benzoic acids and amines underultrasonicirradiation in the presence of Lewis acidic ionicliquid immobilized on diatomite earth (diatomite earth@IL/ZrCl4). A new, highly efficient and green solid acid catalyst was easily prepared via a two-step procedure and used as an effective reusable catalyst. The prepared catalyst provides active sites for the synthesis of benzamides. The advantages of
据报道,绿色,快速,温和且高效的途径可制备苯甲酰胺衍生物。该反应是通过在超声波辐射下,在固定在硅藻土上的路易斯酸性离子液体(硅藻土Earth @ IL / ZrCl 4)存在下,通过苯甲酸和胺的直接缩合进行的。)。通过两步程序可以轻松制备一种新型的高效绿色固体酸催化剂,并将其用作有效的可重复使用的催化剂。制备的催化剂提供了用于合成苯甲酰胺的活性位点。该方法的优点是使用了优良且可回收的催化剂,反应时间短,过程简单,产率高且环保的工艺以及将超声波辐射用作绿色而强大的技术。由于苯甲酰胺广泛用于制药,造纸和塑料工业,并且还用作合成治疗剂的中间产品,因此针对此类化合物提出的新合成方法可能具有相当重要的意义。