Potassium Phosphate, Tribasic → 4-{5-[4-({(4S,5R)-5-[3,5-Bis(trifluoromethyl)phenyl]-4-methyl-2-oxo-1,3-oxazolidin-3-yl}methyl)-2-(methylsulfanyl)pyrimidin-5-yl]-4-tert-butyl-1,3-thiazol-2-yl}-3-methylbenzoic acid

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Reaction Steps

To a solution of (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-3-{[2-(methylsulfanyl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrimidin-4-yl]methyl}-1,3-oxazolidin-2-one (INTERMEDIATE 21, 2.0 g, 3.46 m mol), 4-(5-bromo-4-tert-butylthiazol-2-yl)-3-methylbenzoic acid (INTERMEDIATE 41, 1.350 g, 3.81 mmol), potassium phosphate (8.18 mL, 1.27 M, 10.39 m mol) in THF (5 mL) and water (5.00 mL) was added tetrakis(triphenylphosphine)palladium(0) (0.400 g, 0.346 mmol). It was degassed, and refilled with nitrogen. The reaction mixture was heated to reflux for 2 hours to see complete conversion by LCMS. It was distributed between 100 mL of water and 300 mL of ethyl acetate. The organic layer was collected, dried over sodium sulfate, filtered and the filtrate concentrated. The crude isolate was purified by silica gel chromatography, eluting with 30% ethyl acetate in hexanes to give the title compound as white solid (225 mg, 9.0% yield). LCMS (M+H)+: 725.0

Provenance & Evidence