Potassium Phosphate, Tribasic → 7-(1,4-dimethyl-1H-pyrazol-5-yl)-4-pyridin-2-yl-4,5-dihydroimidazo[1,5,4-de][1,4]benzoxazin-2(1H)-one

Participants

Reaction Conditions

Reaction Steps

7-Bromo-4-pyridin-2-yl-4,5-dihydroimidazo[1,5,4-de][1,4]benzoxazin-2(1H)-one (28 mg, 0.084 mmol) was dissolved in 1,4-dioxane (0.67 mL). 1,4-Dimethyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (28 mg, 0.13 mmol) and potassium phosphate (40 mg, 0.2 mmol) in water (0.17 mL) was added. The reaction mixture was deoxygenated with nitrogen. Dicyclohexyl(2′,4′,6′-triisopropylbiphenyl-2-yl)phosphine-(2′-aminobiphenyl-2-yl)(chloro)palladium (1:1) (2 mg, 0.002 mmol) was added and the mixture was again deoxygenated with nitrogen. The reaction mixture was then stirred at 90° C. under nitrogen for 2 h. Product was purified using preparative LCMS (pH 10) to give the title compound. LCMS calc. for C19H17N5O2 (M+H)+: m/z=348.1. found: 348.0.

Provenance & Evidence