Acetonitrile → (S)-4-(1-Methyl-5-(5-(2-methyl-4-(oxetan-3-yl)piperazin-1-yl)pyridin-2-ylamino)-6-oxo-1,6-dihydropyridin-3-yl)-2-(1-oxo-6,7,8,9-tetrahydropyrazino[1,2-a]indol-2(1H)-yl)nicotinaldehyde

Participants

Reaction Conditions

Reaction Steps

A round-bottomed flask was charged with 4-chloro-2-(1-oxo-6,7,8,9-tetrahydropyrazino[1,2-a]indol-2(1H)-yl)nicotinaldehyde 121a (180 mg, 0.55 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 191j (397 mg, 0.82 mmol), PdCl2(dppf) (45 mg, 0.06 mmol), K3PO4 trihydrate (286 mg, 1.10 mmol), sodium acetate (90 mg, 1.10 mmol), acetonitrile (15 mL), and water (1.5 mL). After three cycles of vacuum/argon flush, the mixture was heated at 100° C. for 3 h. It was then filtered and the filtrate was evaporated under reduced pressure. The residue was purified by silica-gel column chromatography eluting with 1:20 methanol/dichloromethane to afford 176a as a red solid (228 mg, 64%). MS-ESI: [M+H]+ 647.3

Provenance & Evidence