Journal of Organic Chemistry p. 6030 - 6037 (1993)
Update date:2022-07-29
Topics:
Minguez, Jose M.
Gandasegui, Teresa
Vaquero, Juan J.
Alvarez-Builla, Julio
Garcia-Navio, Jose L.
et al.
Reaction of N-<(2'-benzimidazolyl)methyl>pyridinium salts 2 with isothiocyanates results in a series of 3-(2'-benzimidazolyl)imidazo<1,2-a>pyridinium 2-thiolate derivatives 3 classified as conjugated mesomeric betaines.S-Methylation followed by deprotonation easily converts 3 into a new family of conjugated betaines 5.Semiempirical molecular orbital calculations provide complementary information to the X-ray analysis and experimental dipole moments of both betaines.
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