p-Toluenesulfonic acid → N2-(4-bromo-2,5-dimethylphenyl)-5-chloro-N4-(5-methyl-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazol-3-yl)pyrimidine-2,4-diamine

Participants

Reaction Steps

To a solution of N2-(4-bromo-2,5-dimethylphenyl)-5-chloro-N4-(5-methyl-1H-pyrazol-3-yl)pyrimidine-2,4-diamine (280 mg, 0.69 mmol) in THF (3 mL) was added p-TSA (119 mg, 0.69 mmol) and 3,4-dihydro-2H-pyran (348 mg, 2.86 mmol). The mixture was stirred at room temperature for 14 h and then poured into saturated aqueous NaHCO3 solution (10 mL). The resulting mixture was extracted with EtOAc (3×10 mL) and the combined organic layers were concentrated. The resulting residue was purified by flash column chromatography (silica gel, 0-50% EtOAc in hexanes gradient) to provide N2-(4-bromo-2,5-dimethylphenyl)-5-chloro-N4-(5-methyl-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazol-3-yl)pyrimidine-2,4-diamine as a white solid; ESMS m/z 491.1 (M+H+).

Provenance & Evidence