Alkylation and aralkylation of N-heterocycles - Part III. Methylation and benzylation of 5 (or 6)-chloro benzimidazoles
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Methylation and benzylation of 5 (or 6)-chloro benzimidazoles have been carried out under uniform conditions and the structures of the products obtained have been established by comparison with authentic samples prepared by unambiguous methods. The results are explained on the basis of inductive (−I) and resonance (+M) effects of chlorogroup and the tautomer stabilisation.
K Kondal Reddy1 N V Subba Rao1