1,2-Dichloroethane → 4-[2-[2-(4-Fluoro-phenyl)-ethylsulfanyl]-2-(2,2,2-trichloro-ethoxycarbonyl)-ethyl]-benzoic acid 2-phenyl-5-trifluoromethyl-oxazol-4-ylmethylester

Participants

Reaction Steps

To a solution of 4-[2-[2-(4-fluoro-phenyl)-ethylsulfanyl]-2-(2,2,2-trichloro-ethoxy-carbonyl)-ethyl]-benzoic acid (278 mg, 0.58 mmol) and (2-phenyl-5-trifluoromethyl-oxazol-4-yl)-methanol (155 mg, 0.64 mmol) in anhydrous DCM (20 mL) was first added EDC×HCl (144 mg, 0.75 mmol) then DMAP (1.0 mg, 0.006 mol) under nitrogen atmosphere at 0° C. After complete addition the cooling bath was removed and the reaction mixture was stirred at ambient temperature until no starting material was left. The mixture was diluted with water and aq. HCl (2N) and extracted with DCM. The combined organic layers were dried (MgSO4) and the solvent was evaporated under reduced pressure. The crude product was purified by flash chromatography using n-heptane/EtOAc 4:1 as the eluent to afford the final product as an oil (289 mg, 56.6%). 1H NMR (400 MHz, CDCl3): δ 8.02 (d, 2H), 7.93 (d, 1H), 7.40-7.47 (m, 2H), 7.19-7.29 (m, 4H), 7.02 (dt, 2H), 6.89 (dt, 2H), 5.34 (d, 2H), 4.64 (q, 2H), 3.50 (dd, 1H), 3.18-3.24 (dd, 1H), 2.73-2.98 (m, 5H), 1.1 (s, 2H). Mass Spectrum: M−H+ 703.91.

Provenance & Evidence