HCID 11664349, compound → HCID 11621422, compound

Participants

Reaction Steps

To a −40° C. solution of (4S,5R)-3-[2-(4-acetyl-1,3-thiazol-2-yl)-5-(trifluoromethyl)benzyl]-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one (Example 135) (38.1 mg, 0.064 mmol) in THF/heptanes (1:1, 8 mL) was added MeMgBr (21 μL of a 3M solution in Et2O, 0.07 mmol). The temperature was maintained between −40° C. and −20° C. and the reaction was monitored closely by TLC; additional MeMgBr was added dropwise until nearly all starting ketone was consumed. At this point, the reaction was quenched by pouring it into saturated NH4Cl (15 mL). The mixture was extracted with EtOAc (50 mL) and the organic layer was washed with water and brine (15 mL each). The organic layer was dried over Na2SO4, filtered, and concentrated. Purification of the residue by flash chromatography on silica gel (10 to 60% EtOAc/hexanes) afforded (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-[2-[4-(1-hydroxy-1-methylethyl)-1,3-thiazol-2-yl]-5-(trifluoromethyl)benzyl]-4-methyl-1,3-oxazolidin-2-one. Rf=0.20 (40% EtOAc/hexanes). LCMS=613 (M+1)+. 1H NMR (CD2Cl2, 500 MHz) δ 7.90 (s, 1H), 7.85 (d, J=8.0 Hz, 1H), 7.77 (s, 3H), 7.71 (d, J=8.3 Hz, 1H), 7.32 (s, 1H), 5.59 (d, J=8.0 Hz, 1H), 5.28 (d, J=15.8 Hz, 1H), 4.74 (d, J=15.8 Hz, 1H), 3.89 (m, 1H), 3.01 (bs, 1H), 1.63 (s, 3H), 1.62 (s, 3H), 0.64 (d, J=6.5 Hz, 3H).

Provenance & Evidence