Brønsted acid sites in the Beta zeolite induced highly efficient amidation of styrene in the aqueous phase
作者:Jiteng Liu、Xueqin Jia、Lei Zhang、Wenqian Fu
DOI:10.1039/d3nj05870k
日期:2024.3.18
an environmentally friendly catalyst system is a highly attractive strategy for organic synthesis. In this work, a H-form mesoporous Beta (H-MBeta) zeolite with an irregular spherical particle shape was synthesized and was found to realize the direct amidation of styrene and nitriles for the synthesis of N-alkylated amides in the aqueous phase. This strong acidic H-MBeta catalyst exhibited superior activity
开发环境友好的催化剂体系对于有机合成来说是一个极具吸引力的策略。本工作合成了一种具有不规则球形颗粒形状的H型介孔β(H-MBeta)沸石,并发现其可以实现苯乙烯和腈的直接酰胺化,从而在水相中合成N-烷基化酰胺。与酸脱铝法获得的H-MBeta-0.3和H-MBeta-1.0沸石相比,这种强酸性H-MBeta催化剂表现出优异的活性和产物选择性。这归因于H-MBeta沸石中存在丰富的强布朗斯台德酸位点,可以通过与质子氢相互作用的CC键诱导苯乙烯的吸附和活化,有利于关键中间碳正离子的形成。