Acetic Acid → N1-((2-(dimethoxymethyl)-5,6,7,8-tetrahydro-1,8-naphthyridin-3-yl)methyl)-N2,N2-dimethylethane-1,2-diamine

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Reaction Steps

To a solution of 2-(dimethoxymethyl)-5,6,7,8-tetrahydro-1,8-naphthyridine-3-carbaldehyde (intermediate 41, 1.5 g, 6.35 mmol) in DCM (40 ml) at room temperature was added 2-dimethylaminoethylamine (1.387 ml, 12.70 mmol) and AcOH (0.472 mL, 8.25 mmol), followed by Na(AcO)3BH (2.69 g, 12.70 mmol) and the reaction mixture was allowed to stir at room temperature overnight. The reaction mixture was diluted with DCM, quenched with saturated aqueous NaHCO3 and stirred for 20 min. Phases were separated and the water phase was extracted with DCM. Organic phases were combined, dried using Na2SO4, filtered and concentrated. The crude product was purified via silica gel column chromatography eluting with a gradient of MeOH (0-15%) in DCM. Fractions containing the product were combined and concentrated to yield the title compound.

Provenance & Evidence