Pyridine → Sufugolix

Participants

Reaction Steps

O-methylhydroxylamine hydrochloride (351 mg, 4.20 mmol) was dissolved in dimethylacetamide (2 ml), pyridine (340 μl, 4.20 mmol) and phenyl chloroformate (phenyl chlorocarbonate)(527 μl, 4.20 mmol) were added thereto successively dropwise, and the mixture was stirred at room temperature for 20 minutes. 6-(4-aminophenyl)-5-(N-benzyl-N-methylaminomethyl)-1-(2,6-difluorobenzyl)-3-phenylthieno[2,3-d]pyrimidine-2,4(1H, 3H)-dione (500 mg, 0.84 μmol) and triethylamine (1.29 ml, 9.25 mmol) were added thereto, and the mixture was stirred at 50° C. for 18 hours. Water (40 ml) was added thereto, and the mixture was stirred vigorously. The crystals were filtered, and dried under vacuum at 40° C. to give white crystals of 5-(N-benzyl-N-methylaminomethyl)-1-(2,6-difluorobenzyl)-6-[4-(3-methoxyureido)phenyl]-3-phenylthieno[2,3-d]pyrimidine-2,4(1H, 3H)-dione (0.58 g) quantitatively.

Provenance & Evidence