Cesium carbonate → tert-butyl N-[(3S)-1-[3-cyclopropyl-6-[6-(5-ethyl-3-pyridyl)pyrazolo[4,3-c]pyridin-1-yl]-2-pyridyl]-3-piperidyl]carbamate

Participants

Reaction Conditions

Reaction Steps

A mixture of tert-butyl N-[(3S)-1-[3-chloro-6-[6-(5-ethyl-3-pyridyl)pyrazolo[4,3-c]pyridin-1-yl]-2-pyridyl]-3-piperidyl]carbamate (0.0801 mmol; 42.8 mg), potassium cyclopropyl trifluoroborate (0.120 mmol; 18.3 mg), butyldi-1-adamantylphosphine (0.0240 mmol; 9.07 mg), cesium carbonate (0.240 mmol; 78.3 mg) and palladium (II) acetate (0.0160 mmol; 3.60 mg) in Water (0.5 mL) and Toluene (4.5 mL) was purged with Argon for 1 minute. The reaction mixture in a pressure tube was stirred at 105° C. for 3 days. The layers were separated. The organic later was concentrated. The residue was purified on silica eluted with 0 to 5% MeOH in DCM to afford tert-butyl N-[(3S)-1-[3-cyclopropyl-6-[6-(5-ethyl-3-pyridyl)pyrazolo[4,3-c]pyridin-1-yl]-2-pyridyl]-3-piperidyl]carbamate (32.2 mg, 74%).

Provenance & Evidence