已经开发了一种二元酸体系,其特征是具有空气稳定性的有机金属前体,二茂钛二氯化物和简单的有机协作布朗斯台德酸,可实现芳基和烷基酮的温和高效的曼尼希反应,并具有优异的收率和令人满意的非对映选择性。机理研究,包括1 H NMR滴定,X射线结构分析以及催化活性物质的分离,阐明了这种新的二元酸体系的巨大协同作用。
Deep Eutectic Solvent as a Recyclable Catalyst for Three-Component Synthesis of β-Amino Carbonyls
作者:Fariba Keshavarzipour、Hossein Tavakol
DOI:10.1007/s10562-014-1471-6
日期:2015.4
We have reported one-pot, three-component Mannich type reaction of aldehyde, amines and ketone (acetone and acetophenones), catalyzed by deep eutectic solvent (choline chloride/zinc chloride) at room temperature to give beta-amino carbonyls in good yields. The catalyst could be recycled at least four times without remarkable decrease in its catalytic activity. The general method is easy, fast and environmental friendly.