Tetrabutylammonium Tribromide (TBATB) as An Efficient Generator of HBr for an Efficient Chemoselective Reagent for Acetalization of Carbonyl Compounds
作者:Rangam Gopinath、Sk. Jiaul Haque、Bhisma K. Patel
DOI:10.1021/jo025701o
日期:2002.8.1
Acyclic and cyclic acetals of various carbonyl compounds were obtained in excellent yields under a mild reaction condition in the presence of trialkyl orthoformate and a catalytic amount of tetrabutylammonium tribromide (TBATB) in absolute alcohol. Chemoselective acetalization of an aldehyde in the presence of ketone, unsymmetrical acetal formation, shorter reaction times, mild reaction conditions
在原甲酸三烷基酯和催化量的三丁基溴化四丁基铵(TBATB)在无水醇中存在的条件下,在温和的反应条件下,以优异的收率获得了各种羰基化合物的无环和环状缩醛。在酮存在下对醛进行化学选择性乙缩醛化,不对称缩醛形成,较短的反应时间,温和的反应条件,酸敏感保护基团的稳定性,高效率,所需产物的容易分离以及试剂的催化性质本方法学是一种实用的选择。