p-Toluenesulfonic acid monohydrate → 2-[4-(4-acetyl-3,5-dimethyl-piperazin-1-yl)-phenyl]-5,7-difluoro-3H-quinazolin-4-one

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 2-amino-4,6-difluoro-benzamide (0.66 g, 3.84 mmol) and 4-(4-acetyl-3,5-dimethyl-piperazin-1-yl)-benzaldehyde (1.00 g, 3.84 mmol) in N,N-dimethyl acetamide (20 mL), was added sodium hydrogen sulfite (58.5 wt %, 1.04 g, 5.76 mmol) and p-toluenesulfonic acid monohydrate (0.88 g, 4.61 mmol) and the reaction mixture was stirred at 115° C. for 16 hours. The solvent was evaporated in vacuo, water was added, and the precipitated solid was filtered off, to give 2-[4-(4-acetyl-3,5-dimethyl-piperazin-1-yl)-phenyl]-5,7-difluoro-3H-quinazolin-4-one as a yellow solid, which was used in the next step without further purification.

Provenance & Evidence