Ethanol → HCID 178513112, compound

Participants

Reaction Steps

3-[4-(6 tert-Butoxypyridin-3-yl)piperazin-1-yl]-2-fluorobenzyl carbamimidoylcarbamate (132 mg) was dissolved in dichloromethane (3.4 ml), and TFA (508 mg) was added thereto, followed by stirring at room temperature for 4 hours. The reaction mixture was concentrated under reduced pressure, the residue was mixed with CHCl3/MeOH, and basic silica gel was added thereto, followed by concentrating under reduced pressure. The residue was purified by basic silica gel column chromatography (CHCl3/MeOH). The purified product thus obtained was mixed with EtOH (5 ml), and L-tartaric acid (41.0 mg) were added thereto, followed by stirring at 80° C. for 1 hour, and then stirring at room temperature for 1 hour. The solid was collected by filtration, washed with EtOH, and then dried at 50° C. under reduced pressure to obtain 2-fluoro-3-[4-(6-oxo-1,6-dihydropyridin-3-yl)piperazin-1-yl]benzyl carbamimidoylcarbamate L-tartrate (125 mg).

Provenance & Evidence