1,4-Dioxane → (4S,5R)-5-[3,5-Bis(trifluoromethyl)phenyl]-3-{[5-(5-chloro-2-methoxypyridin-3-yl)-2-(methylthio)pyrimidin-4-yl]methyl}-4-methyl-1,3-oxazolidin-2-one

Participants

Reaction Conditions

Reaction Steps

A dioxane (17.3 mL) 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 mmol), 3-bromo-5-chloro-2-methoxypyridine (0.925 g, 4.16 mmol) and 2M potassium phosphate tribasic (3.5 mL, 7.00 mmol) in a microwave vial was evacuated and charged three times with nitrogen. Then Pd(Ph3P)4 (0.400 g, 0.346 mmol) was added and the reaction vial was capped. The reaction was stirred for 10 minutes at 170° C. in a microwave reactor. LCMS showed complete conversion to the product. The reaction was diluted with acetonitrile (5 mL) and filtered through a 2 g plug of RP C18 silica, rinsing with 10 mL acetonitrile. The filtrate was concentrated and the crude was purified by silica gel chromatography, eluting with a gradient of 0-50% ethyl acetate/hexanes to give the title compound as a pale yellow foam. LCMS (M+H)+: 593.3

Provenance & Evidence