Tetrahydrofuran → (S)-4-Fluoro-2-(10-fluoro-1-oxo-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-2(1H)-yl)-6-(1-methyl-5-(5-(2-methyl-4-(oxetan-3-yl)piperazin-1-yl)pyridin-2-ylamino)-6-oxo-1,6-dihydropyridin-3-yl)benzyl Acetate

Participants

Reaction Steps

A 50-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 119c (150 mg, 1.0 eq., 0.33 mmol), (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 113f (160 mg, 1.0 eq., 0.33 mmol), K3PO4 (210 mg, 3.0 eq., 0.99 mmol), PdCl2(dppf) (27.0 mg, 0.10 eq., 0.033 mmol), THF (20 mL), and water (0.1 mL). After three cycles of vacuum/argon flush, the mixture was heated at reflux for 2 h. It was then cooled to room temperature and filtered. The filtrate was concentrated under reduced pressure and the resulting residue was purified by silica-gel column chromatography eluting with 40:1 dichloromethane/methanol to afford 119d as a yellow solid (90 mg, 37%). MS: [M+H]+ 728.3.

Provenance & Evidence