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

Participants

Reaction Steps

N-(5-cyanopyrazin-2-yl)-7-(dimethoxymethyl)-3,4-dihydro-1,8-naphthyridine-1(2H)-carboxamide (intermediate 2A, 32 mg, 0.090 mmol) was treated with HCl (4M in dioxane, 2 ml, 65.8 mmol) and stirred at room temperature for 1 h. The reaction mixture was concentrated under vacuum to dryness. The crude material was purified by normal phase chromatography (4 g silica gel cartridge, DCM/(DCM/MeOH 9:1) 100:0 to 0:100). The product containing fraction was collected and concentrated under vacuum to obtain the title compound as a white solid.

Provenance & Evidence