Triethylamine → N-[4-(5H-Pyrrolo[2,1-c][1,4]benzodiazepin-10(11H)ylcarbonyl)phenyl]-5-fluoro-2-methylbenzamide

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 500 mg of 10,11-dihydro-10-(4-aminobenzoyl)-5H-pyrrolo[2,1-c][1,4]-benzodiazepine in 3 ml of methylene chloride, cooled to 0° C., under argon, is added 346 μl of triethylamine followed by the addition of 340 mg of 2-methyl-5-fluorobenzoyl chloride in 2 ml of methylene chloride. The cooling bath is removed and stirring continued for 18 hours. After cooling to 0° C., an additional 342 mg of 2-methyl-5-fluorobenzoyl chloride in 2 ml of methylene chloride is added. The cooling bath is removed and stirring continued for 18 hours. The volatiles are removed in vacuo to a residue which is dissolved in 50 ml of methylene chloride and washed with 20 ml each of water, 2 N citric acid, 1 M sodium bicarbonate and brine. The organic layer is dried over Na2SO4 and passed through a pad of hydrous magnesium silicate. The filtrate is evaporated in vacuo to a residue which is crystallized from ethyl acetate-hexane to give 295 mg of the desired product as a white solid, m.p. 170-180° C.

Provenance & Evidence