1,5-Electrocyclization of 1-alkyl- 3-[(2Z)-2,4-diaryl-4-oxobut-2-en-1-yl]-1H-benzimidazol-3-ium bromides

被引：0
|
作者：
L. M. Potikha
A. R. Turelyk
V. A. Kovtunenko
机构：
[1] Taras Shevchenko National University,
来源：
Chemistry of Heterocyclic Compounds | 2011年 / 47卷
关键词：
benzimidazolium ylide; pyrido[1,2-; ]benzimidazole; pyrrolo[1,2-; ]benzimidazole; 1,5-electrocyclization;
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暂无
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学科分类号：
摘要：
Cyclization of 1-alkyl-3-[(2Z)-2,4-diaryl-4-oxobut-2-en-1-yl]-1H-benzimidazol-3-ium bromides occurs in the presence of MeONa at a reduced temperature of 5–10°C via a 1,5-electrocyclization mechanism to give 3a,4-dihydro-3H-pyrrolo[1,2-a]benzimidazoles. These are unstable under the reaction conditions and are readily converted to {1-[2-(alkylamino)phenyl]-4-phenyl-1H-pyrrol-3-yl}(phenyl)methanones.
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页码：452 / 455
页数：3
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