一种新型聚合物催化剂——聚苯乙烯-四氯化钛复合物

<正> 易于水解的三氯化铝和三氟化硼都可与聚苯乙烯反应形成稳定的复合物,具有催化酯化、缩醛、缩酮等有机反应的效能。我们将在空气中强烈水解的四氯化钛与聚苯乙烯反应,制备了一种稳定的新型聚合物固载化的Lewis酸催化剂,并证明它对酯化、缩醛、缩酮、付氏烷基化及α-甲基苯乙烯的聚合反应都具有良好的催化作用。

A NEW POLYMER SUPPORTED CATALYST——A Complex of Polystyrene-Titanium Tetrachloride

Polystyrene, cross-linked with 4% of divinylbenzene, is combined with TiCl in CS2 to form a stable complex containing 20.3% of chlorine. The TiCl4 complexed in polystyrene is resistant to water and can be stored in air at least one year. The complex is a strong solid Lewis acid and can be used to catalyze a lot of organic synthesis reactions in high yield, such as esterications, acetal formations, ketogenesis, and the Friedel-Cra-fts alkylations. The complex is also a good catalyst for polymerization of α-methyl styrene.