Tetrahydrofuran → HCID 19787200, compound

Participants

Reaction Steps

To a mixture of 5-amino-2-chloro-4-(2-methylphenyl)thieno[2,3-b]pyridine hydrochloride ethanol solvate (160 mg) and tetrahydrofuran (3 ml) were added dropwise triethylamine (0.07 ml) and 2,4-difluorophenyl isocyanate (0.12 ml). The mixture was stirred at room temperature for 5 hours and the solvent was distilled off. Water was added to the residue and the mixture was extracted with ethyl acetate. The extract was washed with water and dried over MgSO4 and the solvent was distilled off. To the residue was added isopropyl ether to obtain N-[2-chloro-4-(2-methylphenyl)thieno[2,3-b]pyridin-5-yl]-N'-[2,4-difluorophenyl)urea (133 mg, 68.9%) as crystals. crystals were recrystallized from ethanol to obtain colorless prisms, mp; 225°-226° C.

Provenance & Evidence