Potassium Phosphate, Tribasic → HCID 70664635, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-ethyl-1H-indazol-5-ylboronic acid (196 mg, 1.03 mmol) in dioxane (6 mL) was added methyl 2-chloro-3-(isopropyl(methyl)amino)quinoxaline-6-carboxylate (Scheme I, 120 mg, 0.41 mmol), K3PO4 (259 mg, 1.23 mmol), Pd(PPh3)4 (20 mg, 0.02 mmol) and water (5 drops) with stirring for 4 h at 90° C. in an oil bath under an inert atmosphere of nitrogen. The reaction mixture was concentrated under vacuum and then purified by a silica gel column with 1% to 5% ethyl acetate in petroleum ether to afford methyl 2-(1-ethyl-1H-indazol-5-yl)-3-(isopropyl(methyl)amino)quinoxaline-6-carboxylate as a light yellow solid (80 mg, 49%).

Provenance & Evidence