Methylamine → 4-[2-(5-Chloro-2-fluorophenyl)-6,7-dihydrofuro[3,2-d]pyrimidin-4-ylamino]-N-methyl nicotinamide

Participants

Reaction Steps

To a suspension of 4-[2-(5-chloro-2-fluorophenyl)-6,7-dihydrofuro[3,2-d]pyrimidin-4-ylamino]-nicotinic acid (75 mg, 0.19 mmol, 1 eq) in DMF (2 ml) was added triethylamine (30 μl, 0.21 mmol, 1.1 eq) followed by methylamine (1.17 ml, 3.89 mmol, 2 M solution in THF, 20 eq). To the suspension was added a solution of PyBrOP (100 mg, 0.21 mmol, 1.2 eq) in DMF (1 ml) dropwise. The reaction mixture was stirred at room temperature for 16 h. The reaction was concentrated in vacuo and the residue was triturated with ether (2×20 ml). The crude residue was purified by flash column chromatography (5% MeOH in CHCl3) to afford 4-[2-(5-chloro-2-fluorophenyl)-6,7-dihydrofuro[3,2-d]pyrimidin-4-ylamino]-N-methyl nicotinamide, i.e. compound of formula (44) (20 mg, 26%) as a white solid.

Provenance & Evidence