Potassium Phosphate, Tribasic → (S)-methyl 6-(1-(1-benzylpiperidin-4-yl)-5-fluoro-1H-pyrazol-4-yl)-5-cyclobutoxy-2-methyl-3,4-dihydroquinoline-1(2H)-carboxylate

Participants

Reaction Conditions

Reaction Steps

XPhos Precatalyst 2nd Generation (6.0 mg, 0.008 mmol) was added to a nitrogen purged solution of (S)-methyl 5-cyclobutoxy-2-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydroquinoline-1(2H)-carboxylate (30.8 mg, 0.077 mmol), 1-benzyl-4-(4-bromo-5-fluoro-1H-pyrazol-1-yl)piperidine (26.0 mg, 0.077 mmol), and potassium phosphate (81 mg, 0.384 mmol) in 1,4-dioxane (1.00 mL) and water (0.20 mL), and the reaction mixture was heated at 100° C. overnight. The crude reaction mixture was purified directly via column chromatography on silica gel (Biotage 25 g column, gradient elution with 10-20% ethyl acetate in hexanes) to afford methyl (S)-6-(1-(1-benzylpiperidin-4-yl)-5-fluoro-1H-pyrazol-4-yl)-5-cyclobutoxy-2-methyl-3,4-dihydroquinoline-1(2H)-carboxylate (16 mg, 39%) as a white solid. MS (ESI, pos. ion) m/z 533 [M+H]+.

Provenance & Evidence