Potassium Carbonate → HCID 90122616, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 6,8-dibromo-3-(tert-butyl)-3,4-dihydro-2H-benzo[e][1,3]oxazine (Intermediate 6) (0.621 g, 1.79 mmol), 6-(trifluoromethyl)pyridine-3-boronic acid [purchased from Frontier Scientific] (1.025 g, 5.37 mmol), and potassium carbonate (1.979 g, 14.3 mmol) in 2-propanol (30 mL) and water (6 mL) was purged with nitrogen for 20 minutes. Tetrakis(triphenylphosphine)palladium (0) (114 mg, 0.099 mmol) was added and the resulting mixture heated at 72° C. for 60 minutes then the cooled reaction mixture concentrated under reduced pressure. The residue was dissolved in ethyl acetate, washed with water, dried (MgSO4), filtered and concentrated under reduced pressure to afford a dark brown oil. The product was purified using flash chromatography on silica eluting with a solvent gradient of 0 to 30% ethyl acetate in hexanes to give a yellow solid. The solid was triturated with 1:1 v/v MTBE/hexane, filtered and then dried at 40° C./4-8 mm Hg to give 2-((tert-butylamino)methyl)-4,6-bis(6-(trifluoromethyl)pyridin-3-yl)phenol (0.358 g) as an off-white solid.

Provenance & Evidence