ZSM-5-SO3H as a novel, efficient, and reusable catalyst for the chemoselective synthesis and deprotection of 1,1-diacetates under eco-friendly conditions
作者:Ahmad Reza Massah、Roozbeh Javad Kalbasi、Anahita Shafiei
DOI:10.1007/s00706-011-0646-8
日期:2012.4
time as a mild, convenient, reusable, and heterogeneous catalyst. Various types of aldehydes were efficiently converted to their 1,1-diacetates using a catalytic amount of ZSM-5-SO3H in excellent yields under solvent-free and heterogeneous conditions at room temperature. The deprotection of 1,1-diacetates has also been achieved using this novel catalyst in ethanol. The procedure is operationally simple
摘要ZSM-5已被改性为负载型硫酸(ZSM-5-SO 3 H),并首次作为温和,方便,可重复使用的多相催化剂引入。在室温下在无溶剂和非均相条件下,使用催化量的ZSM-5-SO 3 H以优异的收率将各种类型的醛有效地转化为1,1,2-二乙酸酯。使用这种新型催化剂在乙醇中也可以实现1,1-二乙酸酯的脱保护。该过程操作简单,对环境无害,并且仅使用化学计量的酸酐。 图形概要