Benzazole derivatives. IV. Reaction of 1,2,3-trimethylbenzimidazolium salts with aromatic aldehydes

Benzazole derivatives. IV. Reaction of 1,2,3-trimethylbenzimidazolium salts with aromatic aldehydes

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1,2,3-Trimethylbenzimidazolium iodide and its analogue salts with one or two substituents on benzene ring (X = NO2, Br,Cl, CH3) are, due to the reactivity of the 2-methyl group, able to react with para-substituted aromatic aldehydes (X = OH, OCH3, CH3, NMe2, NO2) using piperidine as a catalyst. 1-Me...

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Bibliographic Details
Main Authors: CORINA CERNATESCU, EUGENIA COMANITA
Format: Article
Language:English
Published: Serbian Chemical Society 2005-12-01
Series:Journal of the Serbian Chemical Society
Subjects:
benzimidazolium iodides
condensation reactions
2-stryrylbenzimidazole iodomethylates
Online Access:http://www.shd.org.yu/HtDocs/SHD/vol70/No12/JSCS_V70_No12-01.pdf
Description
Summary:1,2,3-Trimethylbenzimidazolium iodide and its analogue salts with one or two substituents on benzene ring (X = NO2, Br,Cl, CH3) are, due to the reactivity of the 2-methyl group, able to react with para-substituted aromatic aldehydes (X = OH, OCH3, CH3, NMe2, NO2) using piperidine as a catalyst. 1-Methyl-2-styrylbenzimidazole iodomethylates were obtained and their structure elucidated by means of NMR and IR spectroscopy. The compounds are interesting as hemicyanine dyes. They lend themselves to studies based on electronic absorption spectroscopy and they have potential practical applications linked to their photosensitive properties.
ISSN:0352-5139

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