Acetone → HCID 178439760, compound

Participants

Reaction Steps

Ammonia is passed up to saturation into a suspension of 0.4 g. (1.6 mmol) 2-(4-pyridyl)-6,7-dihydro-3H,5H-pyrrolo[2,3-f]benzimidazol-6-one in 20 ml. ethanol and 10 ml. acetone and the reaction mixture then stirred for 2 hours at 60° C. Subsequently, a further 10 ml. acetone are added thereto and stirring continued for 4 hours at 60° C., whereafter the reaction mixture is evaporated, the residue is taken up in ethanol, acidified and suction filtered from the precipitate. The residue obtained is dissolved in water and rendered neutral and the crystals obtained are filtered off with suction and recrystallised from isopropanol/ethyl acetate. Yield: 40 mg. (9% of theory); m.p. >300° C.

Provenance & Evidence