Triethylamine → HCID 66693718, compound

Participants

Reaction Steps

To a stirred solution of 1,6-dihydro-6-oxo-2-phenyl-1-(phenylmethyl)-5-pyrimidinecarboxylic acid (i.e. the product from Example 2, Step C) (1.20 g, 3.92 mmol) in dichloromethane (30 mL) was added oxalyl chloride (998 mg, 7.84 mmol) at 0° C. followed by a catalytic amount (4-drops) of N,N-dimethylformamide. The reaction mixture was allowed to warm to room temperature and stir for 1 h. The reaction mixture was then concentrated under reduced pressure. To the resulting residue was added dichloromethane (30 mL) and 5-hydroxy-1-ethyl-1H-pyrazole, (572 mg, 4.7 mmol), followed by triethylamine (1.18 g, 11.8 mmol), and the reaction mixture was stirred at room temperature for 30 min. Saturated aqueous ammonium chloride solution was added to the reaction mixture, which was then extracted with dichloromethane. The organic layer was dried (MgSO4) and concentrated under reduced pressure. The residue was purified by column chromatography eluting with 70% ethyl acetate in hexanes to afford the title product as a white solid (700 mg).

Provenance & Evidence