Potassium Carbonate → 5-(4-Chloro-phenyl)-3-ethynyl-7-trifluoromethyl-pyrazolo[1,5-a]pyrimidine

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-(4-Chloro-phenyl)-7-trifluoromethyl-3-trimethylsilanylethynyl-pyrazolo[1,5-a]pyrimidine (13.3 g, 34 mmol) in THF (60 mL) and MeOH (150 mL) at 0° C. was added K2CO3 (467 mg, 10 mol %) and the mixture was stirred at 0° C. for 6 h, diluted with TBME and ice water, separated, washed with brine, dried over Na2SO4, concentrated and purified by column chromatography (heptane/EtOAc 100:0-90:10), triturated in heptane, filtered and dried to give the title compound (5.0 g, 45%) as an orange crystalline solid. MS (ISP) 322.2 [(M+H)+] and 324.2 [(M+2+H)+]; mp 102-103° C.

Provenance & Evidence