全氟辛基磺酸催化液态烯烃Friedel-Crafts反应的研究

Studies on Friedel-Crafts Alkylation with Liquid Alkenes Catalyzed by Perfluorooctane Sulfonic Acid

烯烃的Friedel-Crafts烷基化反应(以下简称F-C烷基化反应)一般采用金属卤化物和浓硫酸作催化剂,但两种情况下的后处理都比较复杂,要消耗大量溶剂,催化剂只能一次性使用。近年来,由于苯乙烯与二甲苯反应产物为具有多种工业用途的材料“PXE”,国内外相继报道使用不同的催化剂来改进该反应,这些反应各有优点。

The Friedel-Crafts reaction of aromatic compounds with styrene and cyclohexene as the alkylation reagents, and with solid superacid perfluorooctane sulfonic acid (POSA) as the catalyst is reported. The reaction has high yields, simple procedure and is easy to work up. The reaction with styrene as the alkylation reagent gives 100% para-substituted products, and the reaction with cyclohexene as the alkylation reagent also has a high position selectivity. The catalyst POSA can be reused or recovered, and no waste acidic solution drain off.