反应详情

(4S,5R)-5-[3,5-bis(3-trifluoromethyl)phenyl]-3-[(3-bromo-6-chloropyridin-2-yl)methyl]-4-methyl-1,3-oxazolidin-2-one (INTERMEDIATE 9) (500 mg, 0.966 mmol), methyl 4′-methoxy-2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)biphenyl-4-carboxylate (554 mg, 1.45 mmol), 1,1′-bis(diphenylphosphino)ferrocene-palladium dichloride dichloromethane adduct (158 mg, 20%), aqueous potassium carbonate (966 μL, 2M, 1.93 mmol) and ethanol (5 mL) were heated in an 80° C. oil bath for 1 h. Volatiles were then removed from the crude mixture under reduced pressure. The pot residue was treated with water followed by EtOAc extraction. The combined extracts were dried over Na2SO4 followed by filtration and concentration to afford a dark oil. The resulting oil was purified by flash chromatography (SiO2, Biotage 40+M cartridge, 0-40% EtOAc in hexanes) to afford methyl 3′-[2-({(4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-2-oxo-1,3-oxazolidin-3-yl}methyl)-6-chloropyridin-3-yl]-4′-methoxy-2-methylbiphenyl-4-carboxylate (152 mg), as a yellow glass. LCMS calc.=692.15; found=693.19 (M+1).

1. customVolatiles were then removed from the crude mixture under reduced pressure
2. additionThe pot residue was treated with water
3. extractionfollowed by EtOAc extraction
4. dry with materialThe combined extracts were dried over Na2SO4
5. filtrationfollowed by filtration and concentration
6. customto afford a dark oil
7. customThe resulting oil was purified by flash chromatography (SiO2, Biotage 40+M cartridge, 0-40% EtOAc in hexanes)