Potassium Acetate → 3-Chloro-7-(2-fluoropyridin-3-yl)-5H-chromeno[2,3-c]pyridin-5-one

Participants

Reaction Conditions

Reaction Steps

A vial was charged with 7-bromo-3-chloro-5H-chromeno[2,3-c]pyridin-5-one (3 g, 9.66 mmol), 2-fluoropyridin-3-ylboronic acid (1.497 g, 10.63 mmol), bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(H) (0.684 g, 0.966 mmol), and KOAc (1.510 mL, 24.15 mmol). The vial was evacuated and backfilled with nitrogen (this procedure was repeated twice). ACN (20 mL), dioxane (30 mL) and water (3 mL) were added, and the vial was sealed and the reaction mixture was heated to 120° C. for 4 h. The reaction mixture was cooled to RT. Upon addition of EtOAc, a solid precipitated which was filtered off and dried under vacuum to provide 3-Chloro-7-(2-fluoropyridin-3-yl)-5H-chromeno[2,3-c]pyridin-5-one as a tan solid.

Provenance & Evidence