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Synthesis of Pharmaceutical Intermediates by Toluene Benzylation over Heteropoly Acids on Different Support

机译:不同载体上杂多酸对甲苯苯甲酸酯合成药物中间体

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摘要

象由液相的 diphenylmethane , dimethyl-diphenylmethane ,本甲基甲苯和 benzole 酸一样的药品的中介的选择形成,有是的本甲基氯化物的甲苯 benzylation 一个本甲基 ating 代理人,系统地在飞机泥土上被学习( K-10 , montmorillonite ),飞机H贝它,飞机 MFI 组织了 titanosilicate ( TS-1 )和 heteropoly [ HPA ,也就是 dodeca-tungstophosphoric 酸[ H3PO4 ?¤- 12WO3 ? ¤x H2O ]( TPA ), dodeca-molybdo 磷酸铵水合盐[ H12Mo12N3O40P+aq ]( DMAA ),钨酸钠含水净化[ Na12WO4-2H2O ]( STH )]在泥土,H贝它和 TS-1 上支持了。20%TPA/Clay, 30%TPA/H-Beta 和 30%TPA/TS-1,被观察是在飞机泥土,飞机 H 贝它和飞机 TS-1 上的最好的催化剂样品。催化剂样品为 diphenylmethane, dimethyl-diphenylmethane,本甲基甲苯和 benzole 酸与到本甲基氯化物变换和选择的尊重相比。反应跟随伪 first 顺序率幂律模型。明显的速度常数被计算并且与报导的相比。给词调音:甲苯;benzylation;本甲基氯化物;heteropolyacid;diphenylmethane;dimethyl-diphenyl 甲烷;本甲基甲苯;benzole
机译:Selective formation of pharmaceutical intermediates like diphenylmethane, dimethyldiphenylmethane, benzyl toluene and benzoic acid by liquid phase, toluene benzylation with benzyl chloride as a benzylating agent, was systematically studied over plane clay (K-10, montmorillonite),plane H-Beta, plane MFI structured titanosilicate (TS-1) and heteropoly acids [HPA, namely dodecasupported on clay, H-beta and TS-1. The 20%TPA/Clay, 30%TPA/H-Beta and 30%TPA/TS-1, were observed to be the best catalyst samples over plane clay, plane H-Beta and plane TS-1. The catalyst samples are compared with respect to benzyl chloride conversion and selectivities for diphenylmethane,dimethyl-diphenylmethane, benzyl toluene and benzoic acid. The reaction follows the pseudo-first order rate power law model. The apparent rate constants are calculated and compared with the reported ones.

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