Sulfuric Acid → 1H-Benzimidazole-2-pentanamine

Participants

Reaction Steps

339.5 g (3 mols) of caprolactam, 430 g (4 mols) of o-phenylene diamine and 30 g of 50 % by weight sulphuric acid are reacted in the same way as described in Example 3, giving 510 g (83.7 % of the theoretical) of 2-(5'-aminopentyl)-benzimidazole with a boiling point at 0.1 Torr of 210° to 220°C, and a melting point of 101°C.

Provenance & Evidence