Tetrahydrofuran → (4S,5R)-3-[(6-azetidin-1-yl-3-bromopyridin-2-yl)methyl]-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one

To a microwave tube containing (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-[(3-bromo-6-chloropyridin-2-yl)methyl]-4-methyl-1,3-oxazolidin-2-one (330 mg, 0.637 mmol) was added a 2M solution of azetidine in THF (4 mL, 8 mmol). The tube was sealed and the reaction was heated at 150° C. for 30 minutes in the microwave. The reaction was cooled and concentrated. The residue was purified via flash chromatography on silica gel (0 to 75% ethyl acetate/hexanes) to afford (4S,5R)-3-[(6-azetidin-1-yl-3-bromopyridin-2-yl)methyl]-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one. LCMS=537.9 and 539.8 (M+H)+. 1H NMR (CDCl3, 500 MHz) δ 7.88 (s, 1H), 7.78 (s, 2H), 7.51 (d, J=8.6 Hz, 1H), 6.10 (d, J=8.7 Hz, 1H), 5.77 (d, J=8.6 Hz, 1H), 4.86 (d, J=17.0 Hz, 1H), 4.35 (m, 1H), 4.20 (d, J=16.9 Hz, 1H), 4.01 (m, 4H), 2.40 (m, 2H), 0.78 (d, J=6.7 Hz, 3H).