Chemistry of Heterocyclic Compounds p. 567 - 574 (1993)
Update date:2022-08-02
Topics:
Popov, I. I.
Upon interaction with caustic in a DMSO medium, 2-chloromethylbenzimidazoles are subjected to cyclodimerization, forming 5H,12H-pyrazino<1,2-a:4,5-a'>bis-benzimidazoles; in the presence of nucleophiles (ammonia, amines, anions of β-diketones), under the indicated conditions, the products are the corresponding substituted amines or derivatives of pyrrolo<1,2-a>benzimidazole.
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