analysis. These solid acids were observed as highly efficient reusable catalysts at room temperature for the selective synthesis of β-amino carbonyl compounds via Mannich-type reactions of acetophenone, arylamine and arylaldehydes using two different conditions in CH2Cl2 solution and solvent-free grinding within a short time. The more acidic two catalysts could be recycled for up to five cycles with
摘要 通过将三种
羧酸(CF3COOH、CCl3COOH 和 CH3COOH)在室温下在
乙醚中浸渍在
二氧化硅载体上制备了新型负载型酸性有机催化剂。通过扫描电子显微镜、能量色散 X 射线分析 (EDX)、Brunauer-Emmett-Teller-表面积分析 (BET)、热重分析、傅里叶变换红外和粉末 X 射线衍射分析对催化剂进行了表征。这些固体酸在室温下被观察为高效可重复使用的催化剂,用于通过
苯乙酮、芳胺和芳醛的曼尼希型反应在
CH2Cl2 溶液中使用两种不同条件和无溶剂研磨在短时间内选择性合成 β-
氨基羰基化合物. 酸性更强的两种催化剂最多可循环使用五个循环,催化活性损失很小。图形概要