Sodium Thiosulfate → 4-(2-(difluoro(5-fluoropyridin-2-yl)methyl)-4-((5-methyl-1H-pyrazol-3-yl)amino)quinazolin-8-yl)morpholin-3-one

Participants

Reaction Steps

To 4-(2-(difluoro(5-fluoropyridin-2-yl)methyl)-4-(methylthio)quinazolin-8-yl)morpholin-3-one (180 mg, 0.428 mmol) in DCM (5 mL) at 0° C. was added 3-chloroperbenzoic acid (70%, 158 mg, 0.64 mmol) and the mixture was stirred for 30 min. The mixture was diluted with DCM and then aq sodium thiosulfate was added, followed by saturated aq sodium bicarbonate solution. The organic layer was separated, dried over sodium sulfate, and concentrated under reduced pressure. To the residue were added THF (3 mL) and 5-methyl-1H-pyrazol-3-amine (124 mg, 1.28 mmol) and the mixture was stirred at rt for 5 min. A precipitate formed which was collected by filtration and then purified by preparative HPLC (Varian C-18 reverse phase column, eluted with gradient of solvent B=0.05% formic acid/ACN and solvent A=5% ACN/0.05% formic acid/H2O) to afford 4-(2-(difluoro(5-fluoropyridin-2-yl)methyl)-4-((5-methyl-1H-pyrazol-3-yl)amino)quinazolin-8-yl)morpholin-3-one (40 mg, 20%). 1H NMR (300 MHz, DMSO-d6) δ ppm 2.21 (s, 3H) 3.65 (d, J=4.52 Hz, 2H) 3.85-3.93 (m, 2H) 4.18 (s, 2H) 6.20 (s, 1H) 7.63-7.71 (m, 1H) 7.82 (d, J=7.16 Hz, 1H) 7.93-8.05 (m, 2H) 8.57-8.73 (m, 2H) 10.84 (br s, 1H) 12.24 (br s, 1H); LC-MS (ESI) m/z 470 (M+H)+.

Provenance & Evidence