Dimethylformamide → HCID 117770754, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 3-amino-7-bromo-5-(3-methylbutan-2-yl)-1,5-dihydro-4H-pyrazolo[4,3-c]pyridin-4-one obtained in Step G (332 mg), 1-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (347 mg), tetrakis(triphenylphosphine)palladium(0) (128 mg), aqueous sodium carbonate solution (2 M, 1.11 ml) and N,N-dimethylformamide (6.0 mL) was heated with microwave irradiation at 120° C. for 1 hr. The reaction mixture was cooled to room temperature, and poured into water, and the mixture was extracted with ethyl acetate. The extract was washed with water and saturated brine, and dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (methanol/ethyl acetate), and then HPLC (C18, mobile phase: water/acetonitrile (containing 0.1% TFA)). To the obtained fraction was added saturated aqueous sodium hydrogen carbonate solution, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give the title compound (36.0 mg).

Provenance & Evidence