Potassium Carbonate → HCID 66587467, compound

Participants

Reaction Conditions

Reaction Steps

1.90 g (7.52 mmol) of methyl 3-amino-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxylate 1.50 g (8.27 mmol) of 2-chloro-5-trifluoromethylpyridine, 0.275 g (0.3 mmol) of tris(dibenzylacetone)dipalladium, 0.286 g (0.60 mmol) of 2-dicyclohexylphosphino-2,4,6-triisopropyl-1,1-biphenyl and 3.12 g (22.5 mmol) of potassium carbonate were initially charged in 190 ml of tert-butanol, and the reaction mixture was stirred at 100° C. for 24 hours. After cooling, the mixture was poured into water and extracted repeatedly with ethyl acetate, and the extracts were dried over magnesium sulphate. The solvent was distilled off under reduced pressure and the residue was chromatographed on silica gel, which gave 950 mg (29% of theory) of methyl 1-(3-chloropyridin-2-yl)-3-{[5-(trifluoromethyl)pyridin-2-yl]amino}-1H-pyrazole-5-carboxylate. (logP: 3.14; MH+: 398.0); 1H-NMR (400 MHz, CD3CN, δ, ppm): 3.74 (s, 3H), 7.26 (m, 1H), 7.37 (s, 1H), 7.66 (m, 1H), 7.95 (m, 1H), 8.25 (d, 1H), 8.56 (m, 2H).)

Provenance & Evidence