Dimethylformamide → 4-(1-Methyl-5-(5-(4-(oxetan-3-yl)piperazin-1-yl)pyridin-2-ylamino)-6-oxo-1,6-dihydropyridin-3-yl)-2-(4-oxo-7,8,9,10-tetrahydropyridazino[4,5-a]indolizin-3(4H)-yl)nicotinaldehyde

Participants

Reaction Conditions

Reaction Steps

A 50-mL round bottomed flask equipped with a reflux condenser was charged with 4-chloro-2-(4-oxo-7,8,9,10-tetrahydropyridazino[4,5-a]indolizin-3(4H)-yl)nicotinaldehyde 192c (118 mg, 0.36 mmol), 1-methyl-3-(5-(4-(oxetan-3-yl)piperazin-1-yl)pyridin-2-yl-amino)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one 101l (171 mg, 0.36 mmol), Na2CO3 (78 mg, 0.72 mmol), Pd (dppf)Cl2 (30 mg, 0.036 mmol), DMF (10 mL), and water (1 mL). After bubbling nitrogen through the mixture for 30 minutes, it was heated at 50° C. for 10 hours under N2 protection. It was then cooled to room temperature and evaporated under reduced pressure. The residue was purified by silica-gel column chromatography eluting with 20:1 dichloromethane/methanol to afford 198a (93 mg, 40%) as a brown solid. MS-ESI: [M+H]+ 634.3.

Provenance & Evidence