Potassium Phosphate, Tribasic → 4-[1-Methyl-5-({5-[(2S)-2-methyl-4-(oxetan-3-yl)piperazin-1-yl]pyridin-2-yl}amino)-6-oxo-1,6-dihydropyridin-3-yl]-2-{6-oxo-8-thia-4,5-diaza-tricyclo[7.4.0.02,7]tri-deca-1(9),2(7),3-trien-5-yl}pyridine-3-carbaldehyde

Participants

Reaction Conditions

Reaction Steps

A 50-mL round-bottomed flask equipped with a reflux condenser was charged with (S)-1-methyl-3-(5-(2-methyl-4-(oxetan-3-yl)piperazin-1-yl)pyridin-2-ylamino)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one 191j (168 mg, 0.35 mmol), 4-chloro-2-{6-oxo-8-thia-4,5-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3-trien-5-yl}pyridine-3-carbaldehyde 124a (121 mg, 0.35 mmol), K3PO4 (148 mg, 0.70 mmol), 1,1′-bis(diphenylphosphino)ferrocenedichloropalladium(II) (13 mg, 0.0175 mmol), sodium acetate trihydrate (95 mg, 0.70 mmol), water (6 drops), and acetonitrile (10 mL). After bubbling nitrogen through the mixture for 30 minutes, it was heated at 100° C. under N2 protection for 1 h. Analysis of reaction mixture by LCMS showed completed conversion to the desired product. The reaction mixture was cooled to room temperature and filtered. The filtrate was concentrated under reduced pressure. The residue was diluted with dichloromethane (30 mL) and water (30 mL). The aqueous layer was separated and extracted with dichloromethane (3×20 mL). The combined organic layer was dried over Na2SO4, filtered, and concentrated under reduced pressure. The dark residue was purified by silica-gel column chromatography eluting with dichloromethane/methanol (80/1 to 30/1) to afford 191k (118 mg, 51%) as yellow solid. MS-ESI: [M+H]+ 665

Provenance & Evidence