Hydrochloric Acid → N-(4,5-dicyanopyridin-2-yl)-7-formyl-3,4-dihydro-1,8-naphthyridine-1(2H)-carboxamide

Participants

Reaction Steps

N-(4,5-dicyanopyridin-2-yl)-7-(dimethoxymethyl)-3,4-dihydro-1,8-naphthyridine-1(2H)-carboxamide (intermediate 2F, 15 mg, 0.040 mmol) was dissolved in THF (0.6 ml) and water (0.6 ml) and treated at room temperature with conc. HCl (0.10 ml). The reaction mixture was stirred at room temperature for 1.5 h, diluted in EtOAc and washed with sat. aq. NaHCO3 (2×) and brine. The combined organic layers were dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was triturated with MeOH, the solid was filtered and dried overnight at 40° C. under vacuum to obtain the title compound as a white solid.

Provenance & Evidence