Hydrochloric Acid → 4-aminomethyl-1-phenyl-1H-pyridin-2-one

Participants

Reaction Steps

Tert-butyl (2-oxo-1-phenyl-1,2-dihydropyridin-4-ylmethyl)-carbamate (83 mg, 0.28 mmol) is treated with 4N hydrogen chloride in dioxane in order to remove the Boc protecting group. The hydrochloride salt of 4-aminomethyl-1-phenyl-1H-pyridin-2-one, obtained after concentration of the reaction mixture, is dissolved in N,N-dimethylformamide (5 mL) and is coupled to (4E)-6-iodo-4-(methoxymethylene)isoquinoline-1,3(2H,4H)-dione (92 mg, 0.28 mmol) in the presence of triethylamine (200 μL). After one hour, the reaction mixture is concentrated under reduced pressure and purified by flash silica gel chromatography (methanol/chloroform) to provide (4Z)-6-iodo-4-({[(2-oxo-1-phenyl-1,2dihydropyridin-4-yl)methyl]amino}methylene)isoquinoline-1,3(2H,4H)-dione as a pale yellow solid (8.8 mg, 6.3%).

Provenance & Evidence