Dimethylamine → 3-(5-Cyclopropyl-1,2,4-oxadiazol-3-yl)-4-methyl-5-oxo-6-dimethylamino-4,5-dihydro-imidazo(1,5-a)quinazoline

Participants

Reaction Steps

Gaseous dimethylamine was passed through a stirred solution of 3-(5-cyclopropyl-1,2,4-oxadiazol-3-yl)-4-methyl-5-oxo-6-chloro-4,5-dihydro-imidazo(1,5-a)quinazoline (0.4 g, 1.2 mmol) in 25 ml of dry dimethylformamide at 110° C. for 2 h. The reaction mixture was evaporated in vacuo and the residue was triturated with 20 ml of water, filtered off and dried to give 0.35 g (86%) of 3-(5-cyclopropyl-1,2,4-oxadiazol-3-yl)-4-methyl-5-oxo-6-dimethylamino-4,5-dihydro-imidazo(1,5-a)quinazoline, M.p. 170°-171° C.

Provenance & Evidence