Acetic Acid → HCID 9884982, compound

Participants

Reaction Steps

A mixture of N-(dimethylaminomethylene)-4-(5H,11H-pyrrolo[2,1-c][1,4]-benzodiazepine-10-carbonyl)-benzamide (1.0 g) from Example 46, glacial acetic acid (15 ml), and anhydrous hydrazine (0.16 g) was refluxed for 15 hours and the volatiles removed in vacuo. Saturated aqueous sodium bicarbonate solution was added and the resultant solid was recovered by filtration. The solid was refluxed for 4 hours and the volatiles removed in vacuo to give a solid. The solid was dissolved in dichloromethane and filtered through a short column of hydrous sodium magnesium silicate and further eluted with several volumes of dichloromethane. The combined organic phase was concentrated on a steam bath with the gradual addition of hexane until crystallization occurred. After cooling, the crystals were collected by filtration to yield the title compound (0.39 g), m.p. 225-227° C.; MS, m/z: 355 (M)+.

Provenance & Evidence