Potassium Carbonate → 3-(2-Bromo-5-(trifluoromethyl)phenyl)pyridine

Participants

Reaction Conditions

Reaction Steps

A solution of Pd(Ph3P)4 (1.410 g, 1.220 mmol), 1-bromo-2-iodo-4-(trifluoromethyl)benzene (3.94 ml, 24.41 mmol), pyridin-3-ylboronic acid (3.00 g, 24.41 mmol), and potassium carbonate (13.49 g, 98 mmol) in 32 mL dioxane and 16 mL water was heated to 120° C. overnight. LC/MS showed incomplete conversion, so an additional portion of pyridin-3-ylboronic acid (3.00 g, 24.41 mmol) and potassium carbonate (13.49 g, 98 mmol) were added and the reaction mixture was heated to 120° C. for 3 hours. LC/MS showed no further conversion, so the reaction mixture was poured into water and was extracted with DCM. The organics were then concentrated. Purification of the crude residue by column chromatography (0-100% EtOAc/heptane) gave 3-(2-bromo-5-(trifluoromethyl)phenyl)pyridine (5.150 g, 17.05 mmol, 69.8% yield) as a yellow solid. m/z (ESI) 303.9 (M+H)+.

Provenance & Evidence