Periselective intramolecular [4+2] cycloadditions of ketenimines:: synthesis of pyrido[1,2-a]benzimidazoles

被引：31

作者：

Alajarín, M ^{[1
]}

Vidal, A ^{[1
]}

Tovar, F ^{[1
]}

机构：

[1] Univ Murcia, Fac Quim, Dept Quim Organ, Murcia 30100, Spain

来源：

TETRAHEDRON LETTERS | 2000年 / 41卷 / 36期

关键词：

D O I：

10.1016/S0040-4039(00)01197-7

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A new synthesis of pyrido[1,2-a]benzimidazole derivatives is described. Easily available N-(2-propenylideneaminophenyl)ketenimines underwent an intramolecular [4+2] cycloaddition reaction, in which the cumulated C=C bond of the ketenimine fragment acts as the 2 pi-electron component and the alpha,beta-unsaturated imine function as the 4 pi-electron component, yielding the titled compounds in a periselective manner. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：7029 / 7032

页数：4

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