Trifluoroacetic acid → 6-[(3-Chloro-pyridin-4-ylmethyl)-amino]-nicotinic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To 6-amino-nicotinic acid methyl ester (553, 2.15 g, 0.014 mol) in acetonitrile (60.0 mL) were added 3-chloro-pyridine-4-carbaldehyde (554, 2.00 g, 0.014 mol), triethylsilane (11.00 mL, 0.069 mol) and trifluoroacetic acid (5.00 mL, 0.065 mol). The reaction was stirred at 80° C. overnight. The reaction was concentrated, poured into aqueous potassium carbonate, and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and purified by silica gel column chromatography eluting with 20% to 100% ethyl acetate in hexane to give the desired compound (555, 1.5 g, 38.2%). MS (ESI) [M+H+]+=278.9.

Provenance & Evidence