【摘要】 交联聚苯乙烯白球（含DVB 5～7％）在CS₂中与TiCl₄反应可形成一种稳定的复合物,其含氯量为4.5％。这种复合物不怕水,在空气中放置一年以上不失效。这种高分子载体Lewis酸催化剂可作为酯化、缩醛、缩酮、成醚和付氏烷基化等有机合成反应的良好催化剂,还可重复使用4—5次。更多还原

【Abstract】 Polystyrene,cross-linked with 5-7% of divinylbenzene,is combined withTiCl₄ in CS₂ to form a stable complex containing 4.5% of chlorine. The TiCl₄complexed in the polymer is resistant to water and can store in air at leastfor one year. The Lewis acid complex catalyst can be used to catalyze theconversion of aromatic aldehydes,carboxylic acids,ketones and some alcoholsinto corresponding acetals,esters,ketals and ethers in hish yield. The complexis also effective for the Friedel-Crafts alkylation reaction. For these reactionsthe title catalyst can be used repeatedly 4-5 times.更多还原