Sodium cyanoborohydride → (S)-5-bromo-1-methyl-3-(5-(2-methyl-4-(oxetan-3-yl)piperazin-1-yl)pyrazin-2-ylamino)pyridin-2(1H)-one

Participants

Reaction Conditions

Reaction Steps

A mixture of 230e (2.0 g, 5.3 mmol), oxetan-3-one (763 mg, 10.6 mmol), NaBH3CN (835 mg, 13.3 mmol), and zinc chloride (1.8 g, 13.3 mmol) in methanol (60 mL) was stirred at 50° C. for 30 min. The mixture was concentrated under reduced pressure. To the residue was added water and the resulting mixture was extracted with dichloromethane three times. The combined organic layer was then concentrated under reduced pressure and the resulting residue was purified by silica-gel column chromatography eluting with dichloromethane/methanol (50:1 to 20:1) to afford 230f as a yellow oil (1.6 g, 70%). MS: [M+H]+ 437.2.

Provenance & Evidence