Cesium carbonate → HCID 86273582, compound

Participants

Reaction Conditions

Reaction Steps

3,5-dimethylisoxazole-4-boronic acid (140 mg, 0.993 mmol), cesium carbonate (500 mg, 1.519 mmol) and 1,1-bis(diphenylphosphino)ferocene-palladium(II)dichloride dichloromethane complex are added to a microwave vessel flushed with argon. Dimethyl sulfoxide (5 mL) is added and the mixture purged with argon. Finally, 6-Chloro-3-methyl-4-phenyl-3,4-dihydro-1H-pyrido[3,4-d]pyrimidin-2-one (140 mg, 0.511 mmol) is added and the mixture again purged with argon and heated in a microwave oven at 90° C. for 120 minutes. The mixture is poured onto water and the aqueous phase extracted with dichloromethane. The organic phase is dried over magnesium sulfate. The drying agent is removed by filtration. The filtrate is concentrated to dryness and purified by chromatography on silica gel using a dichloromethane/methanol gradient. The product fractions are evaporated to dryness and purified by reverse phase HPLC. This affordes the desired product as a white solid.

Provenance & Evidence