Potassium Phosphate, Tribasic → HCID 24822773, compound

Participants

Reaction Conditions

Reaction Steps

A resealable tube was charged with 4-chloro-3-fluoro-6,7-dimethoxyquinoline (prepared by the method described in WO 98/13350) (0.610 g, 2.52 mmol), 6-hydroxy-1-naphthoic acid (0.474 g, 2.52 mmol), palladium acetate (0.023 g, 0.101 mmol), 2-di-t-butylphosphino-2′,4′,6′-tri-1-propyl-1,1′-biphenyl (0.086 g, 0.202 mmol), potassium phosphate (2.14 g, 10.08 mmol), and DMF (12.6 mL, Aldrich). The system was flushed with argon and the tube was sealed. The mixture was stirred at 100° C. for 19 h then cooled to RT. Water (13 mL) was added, and the pH was adjusted to 6-7 with aqueous 6 N HCl solution. The resulting precipitate was filtered, washed with water, and purified by column chromatography on silica gel (eluting with 0-100% (50:50:2, EtOAc:hexane:AcOH)) to afford 6-(3-fluoro-6,7-dimethoxyquinolin-4-yloxy)-1-naphthoic acid as an off-white solid. MS (ESI, pos. ion) m/z: 394.0 (M+H). Mass Calc'd for C22H16FNO5: 393.1

Provenance & Evidence