Synthesis and some transformations of trans-1-methyl-2-[β-(2′-thienyl)vinylene]-1H-benzimidazole

被引：0

作者：

Illenzeer, E. V. ^{[1
]}

El'chaninov, M. M. ^{[1
]}

Alexandrov, A. A. ^{[1
]}

机构：

[1] South Russian State Tech Univ, Novocherkassk 346428, Russia

来源：

RUSSIAN JOURNAL OF GENERAL CHEMISTRY | 2013年 / 83卷 / 01期

关键词：

Benzimidazole; Acetic Anhydride; Thiophene Ring; Polyphosphoric Acid; Protonated Molecule;

D O I：

10.1134/S1070363213010155

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The condensation of 1,2-dimethylbenzimidazole with thiophene-2-aldehyde in the presence of fused zinc chloride results in 1-methyl-2-[beta-(2-thienyl)vinylene]-1H-benzimidazole. Its electrophilic substitution reactions (nitration, bromination, sulfonation, formylation, acylation) were studied. All the reactions occur in the 5-position of the thiophene ring. Only in the case of bromination in dichloroethane 5',5(6)-dibromo-derivative was obtained. Data of the quantum-chemical calculations of the total positive charge on the carbon atoms of the protonated molecules of thienylbenzimidazoles including the vinylene group and without it are reported.

引用

页码：91 / 94

页数：4