Dimethyl Sulfoxide → 7-Benzylthio-4-[(2,4-dichloro-5-methoxyphenyl)amino]-6-methoxy-3-quinolinecarbonitrile

Participants

Reaction Conditions

Reaction Steps

A mixture of sodium hydride (169 mg, 4.2 mmol), benzyl mercaptan (145 mg, 1.2 mmol) and 4-[(2,4-dichloro-5-methoxyphenyl)amino]-7-fluoro-6-methoxy-3-quinolinecarbonitrile (250 mg, 0.64 mmol) in 1 mL of tetrahydrofuran is heated at 70° C. for 1 hour, then stirred at room temperature overnight. Upon addition of 1 mL of dimethyl sulfoxide a solution is obtained. Additional amounts of sodium hydride and benzyl mercaptan are added and the reaction mixture is heated at 100° C. The reaction mixture is partitioned between ethyl acetate and water. The organic layer is dried over sodium sulfate, filtered and concentrated in vacuo. The residue is purified by preparative thin layer chromatography, eluting with 1:2 ethyl acetate:hexane to provide 150 mg of 7-benzylthio-4-[(2,4-dichloro-5-methoxyphenyl)amino]-6-methoxy-3-quinolinecarbonitrile, mp 123-125° C.

Provenance & Evidence