反应详情

Compound (6b) (0.5 g) was dissolved in DMF (13 mL), and sodium hydride (0.145 g, a 55% dispersion in paraffin liquid) was added to the resulting solution at 0° C., followed by stirring for 30 min. Then, 3-chloro-4-fluorobenzonitrile was added to the reaction solution, followed by stirring at 60° C. for 1 hr. Water was added to the reaction solution. The precipitate was collected by filtration and washed by sprinkling water to obtain compound (99a) (0.72 g, 85′. %) as a brown solid.

1. stirringby stirring at 60° C. for 1 hr
2. filtrationThe precipitate was collected by filtration
3. washwashed