Trifluoroacetic acid → HCID 178513109, compound

Participants

Reaction Steps

To a mixture of (3-{3-[(6-tert-butoxypyridin-3-yl)oxy]azetidin-1-yl}-2-fluorophenyl)methanol (120 mg) and DMF (2 ml) was added CDI (130 mg), followed by stirring at room temperature for 3 hours. To the reaction mixture was added guanidine carbonate (260 mg), followed by stirring at room temperature for 1 hour. The reaction mixture was concentrated under reduced pressure, water and CHCl3 were added thereto, and the organic layer was dried over anhydrous sodium sulfate. After concentrating under reduced pressure, the obtained residue was purified by silica gel column chromatography (CHCl3/MeOH). The purified product thus obtained was mixed with dichloromethane (2 ml), and TFA (0.5 ml) was added thereto, followed by stirring at room temperature overnight. The reaction solution was concentrated under reduced pressure, and a saturated aqueous sodium hydrogen carbonate solution and CHCl3 were then added thereto. The organic layer was dried over Na2SO4 and then concentrated under reduced pressure. The obtained residue was mixed with a mixed solution of MeCN and H2O at 95:5, and L-tartaric acid (41 mg) was added thereto, followed by stirring at room temperature for 1 hour. The solid was collected by filtration to obtain 2-fluoro-3-({3-[(6-oxo-1,6-dihydropyridin-3-yl)oxy]azetidin-1-yl}benzyl carbamimidoylcarbamate L-tartrate (118 mg).

Provenance & Evidence