Potassium Carbonate → 6-chloro-3-(difluoro-methoxy)-1-trityl-1H-pyrazolo[4,3-c]pyridine

Participants

Reaction Conditions

Reaction Steps

A solution of 6-chloro-1-trityl-1H-pyrazolo[4,3-c]pyridin-3 (2H)-one (Intermediate 3B; 368 mg, 0.893 mmol) and methyl 2-chloro-2,2-difluoroacetate (0.5 mL, 4.74 mmol) in DMF (2 mL) was charged with K2CO3 (2.5 g, 18.09 mmol) at room temperature. The reaction was stirred at 80° C. for 30 min. The reaction mixture was diluted with H2O and filtered to give 6-chloro-3-(difluoro-methoxy)-1-trityl-1H-pyrazolo[4,3-c]pyridine, which was carried onto the next step without further purification. MS ESI calc'd. For C26H18ClF2N3O [M+1]+ 462. found 462.

Provenance & Evidence