Triethylamine → HCID 67065645, compound

Participants

Reaction Steps

To a stirred solution of 1,6-dihydro-6-oxo-1,2-diphenyl-5-pyrimidinecarboxylic acid (i.e. Step B product (B) or the product from Step B1) (1.40 g, 4.8 mmol) in dichloromethane (30 mL) was added oxalyl chloride (1.21 g, 9.61 mmol) at 0° C. followed by catalytic amount (2 drops) of N,N-dimethylformamide. The reaction mixture was allowed to warm to room temperature and stir for 1 h. Then the reaction mixture was concentrated under reduced pressure. To the resulting residue was added dichloromethane (30 mL), 1,3-cyclohexanedione (646 mg, 5.76 mmol), followed by triethylamine (976 mg, 9.60 mmol), and the reaction mixture was stirred at room temperature for 30 min. Saturated aqueous ammonium chloride solution was added, and the mixture was extracted with dichloromethane. The organic layer was dried (MgSO4) and concentrated under reduced pressure. The residue was purified by column chromatography eluting with 50% ethyl acetate in hexanes to afford the title product as a white solid (1.1 g).

Provenance & Evidence