Heterocycles with a bridging nitrogen atom. 15. the novel recyclization of dipyrido[1,2-a:1′(,2′-c]-imidazolium salts to pyrido[1,2-a]- benzimidazole-8-carboxaldehydes

被引：0

作者：

Babaev E.V. ^{[1
]}

Tikhomirov G.A. ^{[1
]}

机构：

[1] M. V. Lomonosov Moscow State Univ.

来源：

Chemistry of Heterocyclic Compounds | 2005年 / 41卷 / 1期

关键词：

Dipyrido[1,2-a:1′,2′-c]imidazoles; Pyrido[1,2-a]benzimidazole; Recyclization; Synthesis of aldehydes; Transformation of a pyridine ring to benzene; Tricyclic aromatic heterocycles with a bridging nitrogen atom;

D O I：

10.1007/s10593-005-0117-4

中图分类号：

学科分类号：

摘要：

A previously unknown recyclization of an 11-acyldipyrido[1,2-a:1′, 2′-c]imidazolium cation to 8-formyl-9-methyl(aryl)pyrido[1,2-a] benzimidazoles has been discovered. The proposed reaction mechanism includes a selective opening of one of the pyridinium rings and the formation of a benzaldehyde fragment via condensation of the intermediate with the participation of the acyl group. © 2005 Springer Science+Business Media, Inc.

引用

页码：119 / 123

页数：4