Cesium carbonate → 5-[(2-Aminopyridin-4-yl)oxy]-6-ethyl-3-{[4-(4-methylpiperazin-1-yl)phenyl]amino}pyrazine-2-carboxamide

Participants

Reaction Conditions

Reaction Steps

A mixture of 5-chloro-6-ethyl-3-{[4-(4-methylpiperazin-1-yl)phenyl]amino}pyrazine-2-carboxamide (200 mg), 2-amino-4-pyridinol (118 mg), cesium carbonate (348 mg), and N-methylpyrrolidone (2 mL) was stirred at 120° C. for 3 hours. The reactant was purified by silica gel column chromatography (eluent; chloroform:methanol=95:5-80:20, NH2 type: eluent; chloroform:methanol=99:1-98:2) and then washed with ethyl acetate to obtain 5-[(2-aminopyridin-4-yl)oxy]-6-ethyl-3-{[4-(4-methylpiperazin-1-yl)phenyl]amino}pyrazine-2-carboxamide (104 mg) as a yellow solid.

Provenance & Evidence