3-Bromo-5-methylaniline → HCID 118216481, compound

Participants

Reaction Conditions

Reaction Steps

2-Chloro-4-(difluoromethyl)-5-fluoropyrimidine (30 g, 162 mmol, 1.00 equiv) p-TsOH (37 g, 215 mmol, 1.33 equiv), 1,4-dioxane (600 mL), 3-bromo-5-methylaniline (46 g, 247 mmol, 1.53 equiv) were added into a 1000-mL pressure tank reactor purged and maintained with an inert atmosphere of nitrogen. The resulting solution was stirred for 72 h at 105° C. The reaction mixture was cooled to room temperature. The solid was filtered out and the filtrate was concentrated under reduced pressure. The residue was applied onto a silica gel and purified column chromatography on silica (1:20 ethyl acetate/petroleum ether) to afford N-(3-bromo-5-methylphenyl)-4-(difluoromethyl)-5-fluoropyrimidin-2-amine as a yellow solid. MS ESI calc'd. for C12H10BrF3N3 [M+H]+332/334. found 332/334. 1H NMR (400 MHz, CDCl3): δ 8.45 (1H, s), 7.73 (1H, s), 7.21 (1H, s), 7.18 (1H, s), 7.05 (1H, s), 6.63 (1H, t, J=53.37 Hz), 2.34 (3H, s).

Provenance & Evidence