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到目前为止,芳烃的烃化反应应用最广的催化剂仍为BF_3,AlCl_3及H_2SO_4等,它们的缺点是副反应和二次反应较多。因此,探索选择性更高的催化剂,仍然是十分引人注意的研究裸题。我们发现,卤代烷基铝可作为以卤代烷进行芳烃烃化时的催化剂。在同一时期的文献中,只兄到一篇关于以卤代烷基铝作为用环己烯进行芳烃烃化的催化剂的报导。根据我们的初步结果,在有溴代乙基鲴倍牛物,即C_2H_5AlBr_2和(C_2H_5)_2AlBr的等分子混合物存在下,甲苯与溴乙烷作用,或苯与1-氯丙烷作用时,均能发生烃化反应,且其烃化产率、选择性及异构化性能均比AlCl_3的文献结果为高。
So far, the most widely used catalysts for the alkylation of aromatics are still BF_3, AlCl_3 and H_2SO_4, which have the disadvantages of many side reactions and secondary reactions. Therefore, exploring more selective catalysts is still a very attractive study topic. We have found that haloalkyl aluminum can be used as a catalyst for the arene alkylation with alkyl halides. In the same period, only one article on the use of haloalkylaluminum as a catalyst for the arene alkylation with cyclohexene was reported. According to our preliminary results, in the presence of an equimolar mixture of ethyl bromoacetate, ie, C_2H_5AlBr_2 and (C_2H_5) _2AlBr, toluene can react with ethyl bromide or benzene with 1-chloropropane Alkylation occurred, and its alkylation yield, selectivity and isomerization performance were higher than those of AlCl_3.