Zeolites Catalyze the Nazarov Reaction and the tert-Butylation of Alcohols by Stabilization of Carboxonium Intermediates
作者:Antonio Leyva-Pérez、María Tejeda-Serrano、Sergio Sanz-Navarro、Finn Blake
DOI:10.1055/s-0039-1690896
日期:2020.7
Zeolites are the most used catalysts worldwide in petrochemistry processes, with particular ability to stabilize carbocations. However, the use of zeolites in organic synthesis is still scarce. We show here that representative carboxonium-mediated organic reactions, such as the Nazarov cyclization and the tert-butylation of alcohols with tert-butyl acetate, typically performed with very strong acid
沸石是全球范围内石化工艺中最常用的催化剂,具有稳定碳正离子的特殊能力。然而,在有机合成中仍很少使用沸石。我们在这里展示的是代表carboxonium介导的有机反应,如环化纳扎罗夫和叔醇与-butylation叔丁基乙酸酯,典型地在溶液中非常强的酸催化剂如三氟甲磺酸进行的,可以通过用简单的沸石催化高收率和选择性。铝硅酸盐骨架稳定了中间的碳氢化合物种类,并超越了溶液中对超酸质子的需求。