Abstract
1, 3-Dibenzyl-2-substituted-5-chloro benzimidazolines have been prepared from N, N2-dibenzyl-4-chloro-o-phenylenediamine and various aldehydes. Pyrolysis of these benzimidazolines yielded 1-benzyl-2-substituted-5-chloro-benzimidazoles, by preferential elimination of benzyl group from the N, meta to chloro group. Structure of the pyrolytic products has been confirmed by comparison with authentic 5-chloro and 6-chloro isomers.
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Veeranagaiah, V., Ratnam, C.V. & Subba Rao, N.V. Studies in the formation of heterocyclic rings containing nitrogen. Proc. Indian Acad. Sci. 79, 230–235 (1974). https://doi.org/10.1007/BF03051324
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DOI: https://doi.org/10.1007/BF03051324