4-chloro-2-(7,7-dimethyl-1-oxo-1,3,4,6,7,8-hexahydro-2H-cyclopenta(4,5)pyrrolo(1,2-a)pyrazin-2-yl)nicotinaldehyde → 2-{4,4-Dimethyl-9-oxo-1,10-diazatricyclo[6.4.0.02,6]dodeca-2(6),7-dien-10-yl}-4-[1-methyl-5-({5-methyl-4H,5H,6H,7H-pyrazolo[1,5-a]pyrazin-2-yl}amino)-6-oxo-1,6-dihydropyridin-3-yl]pyridine-3-carbaldehyde

Participants

Reaction Conditions

Reaction Steps

A 100-mL single-neck round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 141a (130 mg, 0.38 mmol), 1-methyl-3-(5-methyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2(1H)-one 135a (146 mg, 0.38 mmol), Pd(dppf)Cl2 (31 mg, 0.038 mmol), K3CO3 (105 mg, 0.76 mmol), and DMF (20 mL). After three cycles of vacuum/argon flush, the mixture was heated at 110° 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 silica-gel column chromatography eluting with dichloromethane/methanol (30:1) to afford 141b as brown solid (160 mg, 74.6%). MS: [M+H]+ 567.3.

Provenance & Evidence