Water → 5-Bromo-1-methyl-3-(6-(oxetan-3-yl)-5,6,7,8-tetrahydro-1,6-naphthyridin-2-ylamino)pyridin-2(1H)-one

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Reaction Conditions

Reaction Steps

A mixture of 5-bromo-1-methyl-3-(5,6,7,8-tetrahydro-1,6-naphthyridin-2-ylamino)pyridine-2(1H)-one hydrochloride 205a (800 mg, 2.16 mmol), oxetan-3-one (778 mg, 10.8 mmol), NaBH3CN (681 mg, 10.8 mmol), and zinc chloride (1.47 g, 10.8 mmol) in methanol (30 mL) was stirred for 4 hours at 50° C. The mixture was added to H2O (30 mL) and extracted with DCM (50 mL×3). The organic layers were concentrated under reduced pressure. The residue was purified by column chromatography eluting with 10:1 ethyl acetate/methanol to give 219a as a yellow solid (750 mg, 89%). MS: [M+H]+ 391.

Provenance & Evidence