Dimethylformamide → HCID 86583795, compound

Participants

Reaction Steps

13.8 ml of phosphoryl chloride were added dropwise to 12.6 g of 3-[4-chloro-3-(2-chloro-2-ethoxycarbonylethenyl)-phenyl]-2,4-dioxo-6-trifluoromethyl-1,2,3,4-tetrahydropyrimidine, and stirring was carried out for 2 hours at room temperature. Thereafter, 2.1 ml of dimethylformamide were added and stirring was continued for 15 hours at 110-115° C. The reaction mixture was evaporated down under reduced pressure, the residue was added to 150 ml of ice water and the mixture was extracted with twice 100 ml of dichloromethane. The combined organic phases were washed with water, 10% strength sodium bicarbonate and again with water, dried over sodium sulfate and evaporated down. The oil obtained was subjected to flash chromatography (dichloromethane), and the crystalline solid obtained therefrom was stirred with petroleum ether, removed, washed with a little petroleum ether and dried.

Provenance & Evidence