m-Chloroperbenzoic acid → HCID 56848627, compound

Participants

Reaction Conditions

Reaction Steps

To 7-bromo-2-(difluoro(5-fluoropyridin-2-yl)methyl)-4-(methylthio)quinazoline (100 mg, 0.25 mmol) in DCM (3 mL) at 0° C. was added 70% meta-chloroperoxybenzoic acid (74 mg, 0.30 mmol) and the mixture was stirred at 0° C. for 80 min. Then additional 70% meta-chloroperoxybenzoic acid (70%, 15 mg, 0.086 mmol) was added and the mixture was stirred at 0° C. for 10 min. The mixture was diluted with DCM (10 mL), washed with saturated aq NaHCO3 (20 mL) and saturated aq sodium thiosulfate (20 mL), dried over Na2SO4 and concentrated under reduced pressure. To the residue (133 mg) at rt was added 5-methyl-1H-pyrazol-3-amine (92 mg, 0.96 mmol) in THF (3 mL). The mixture was stirred for 40 min and then concentrated under reduced pressure. The residue was purified by preparative HPLC (Phenomenex C-18 reverse phase column, eluted with gradient of solvent B=0.05% AcOH/ACN and solvent A=5% ACN/0.05% AcOH/H2O) to afford 7-bromo-2-(difluoro(5-fluoropyridin-2-yl)methyl)-N-(5-methyl-1H-pyrazol-3-yl)quinazolin-4-amine (4.42 mg, 3.1%). 1H NMR (300 MHz, DMSO-d6) δ 12.09-12.33 (m, 1H), 10.73-10.99 (m, 1H), 8.66 (s, 2H), 8.00 (d, J=5.5 Hz, 3H), 7.74-7.87 (m, 1H), 5.95 (br s, 1H), 2.16 (s, 3H); LC-MS (ESI) m/z 449/451 (M+H)+.

Provenance & Evidence