7-bromo-4-chloro-5H-pyrrolo[3,2-d]pyrimidine → HCID 24958369, compound

Participants

Reaction Steps

To a chilled (−78° C.) solution of 7-bromo-4-chloro-5H-pyrrolo[3,2-d]pyrimidine (80 mg, 0.34 mmol, 1 equiv.) in 5 mL of THF was added tert-BuLi (1.7 M in pentane, 0.43 mL, 0.73 mmol, 2.1 equiv.) dropwise. After 5 minutes, a chilled (−78° C.) solution of 2,2,2-trifluoro-1-[1-(4-fluorophenyl)-1H-indazol-5-yl]ethanone (106 mg, 0.34 mmol, 1 equiv.) in 1 mL of THF was added in one portion. After 15 minutes, the reaction was quenched with 15 mL of water, warmed to room temperature, diluted with 100 mL of saturated aqueous ammonium chloride, and then extracted with EtOAc. The combined organic layers were dried, filtered, and concentrated in vacuo. The residue was dissolved in DMF and purified by reverse phase HPLC (5-95% CH3CN/water+0.1% TFA). The major fractions collected were made basic with saturated NaHCO3 and the CH3CN was concentrated in vacuo. The aqueous was extracted with EtOAc and washed with brine. The organic layers were dried, filtered, and concentrated in vacuo to provide 52 mg (32%) of the title compound as a white solid. MS m/z 462.56 (MH+).

Provenance & Evidence