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Methylpyridylbenzimidazoles. Part I. Mono, bis‐quaternary salts and related polymethyne dyes
Author(s) -
Barni Ermanno,
Savarino Piero,
Viscardi Guido,
Pelizzetti Ezio
Publication year - 1983
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570200106
Subject(s) - chemistry , pyridinium , benzimidazole , imidazole , alkylation , azine , halide , azole , alkyl , ring (chemistry) , pyridinium compounds , medicinal chemistry , organic chemistry , polymer chemistry , antifungal , medicine , dermatology , catalysis
The reaction of 2‐(4‐methyl‐2‐pyridyl)benzimidazole with long chain alkyl halides led to N ‐alkylation at the imidazole ring. The bases obtained were selectively quaternized at the azine and azole nitrogen atoms. The pyridinium salts gave the corresponding polymethyne dyes. Spectral (nmr and uv) and surface properties are briefly discussed.