Potassium Phosphate, Tribasic → 3-(1-Methyl-5-(5-methyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-6-oxo-1,6-dihydropyridin-3-yl)-5-(1-oxo-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-2(1H)-yl)isonicotinaldehyde

Participants

Reaction Conditions

Reaction Steps

A 100-mL single-neck round-bottomed flask was charged with 3-bromo-5-(1-oxo-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-2(1H)-yl)isonicotinaldehyde 101f (298 mg, 0.7 mmol), 1-methyl-3-(5-methyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-5-(4,4,5,5-tetra-methyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one 135a (325 mg, 0.84 mmol), PdCl2(dppf) (30 mg, 0.035 mmol), K3PO4 (300 mg, 1.4 mmol), and NaOAc.3H2O (200 mg, 1.4 mmol) in CH3CN (70 mL). The system was evacuated and refilled with Argon. The reaction mixture was heated at 100° C. 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 flash column chromatography eluting with 25:1 DCM/MeOH to afford 138a (220 mg, 55%) as a pale yellow solid. MS: [M+H]+ 553.3.

Provenance & Evidence