Cesium carbonate → HCID 59813238, compound

Participants

Reaction Steps

A resealable tube was charged with 6-hydroxy-1-naphthoic acid (0.596 g, 3.17 mmol), cesium carbonate (3.10 g, 9.51 mmol), and N,N-dimethylformamide (15 mL, Aldrich). The system was flushed with argon, the tube was sealed, and the mixture stirred at RT for 15 min. A solution of 4-chloro-3-cyano-6,7-dimethoxyquinoline (0.788 g, 3.17 mmol) in N,N-dimethylformamide (10 mL) was added (along with a 5 mL DMF rinse), and the system was again flushed with argon. The tube was sealed and the mixture stirred at 60° C. for 2 h. The mixture was diluted with water (30 mL) and 6 N HCl (aq) was added dropwise with stirring until the pH of the solution was 6-7. The resulting precipitate was filtered and washed with water. The filter cake was dried under vacuum to afford 6-(3-cyano-6,7-dimethoxyquinolin-4-yloxy)-1-naphthoic acid as a light brown solid. MS (ESI, pos. ion) m/z: 401.0 (M+H). Mass Calc'd for C23H16N2O5: 400.

Provenance & Evidence