Triethylamine → HCID 19898220, compound

Participants

Reaction Steps

Triethylamine (3.4 ml) was added at 0°-5° C. to a stirred solution of 2-nitrobenzoyl chloride (4.9 g) and 6-phenylpiperidine-2,4-dione (5 g) in dry dichloromethane (100 ml) and the mixture stirred at ambient temperature for 3.5 hours. The solution was washed successively with 2N hydrochloric acid (25 ml), water (2×25 ml), 5% w/v aqueous sodium carbonate solution (25 ml) and water (3×25 ), dried over magnesium sulphate and evaporated under reduced pressure to give a pale yellow solid which was recrystallised from a mixture of ethyl acetate and hexane (4:1; 20 ml) to give 5,6-dihydro-4-(2-nitrobenzoyl)-6-phenylpyridin-2(1H)-one (4.8 g), mp 139°-141° C., as a light yellow crystalline solid.

Provenance & Evidence