Hydrochloric Acid → N-dodecyl-3,5-bis(m-trifluoromethylphenyl)4-(2-hydroxyethoxy)benzamide

Participants

Reaction Conditions

Reaction Steps

To a flame-dried flask containing dodecyl amine (0.278 g, 1.5 mmol) in THF (5 mL) cooled to −78° C. was added n-BuLi (titrated to 2.37 M in hexanes) (0.670 mL, 1.59 mmol) dropwise. The solution was stirred at −78° C. for 20 min. and then warmed to room temperature over 20 min. The reaction was then recooled to −40° C. and 3,5-bis-(m-trifluoromethylphenyl)4-(2-hydroxyethoxy)benzoic acid ethyl ester (0.215 g, 0.43 mmol) in THF (5 mL) was added. This mixture was allowed to warm to room, temperature over 20 min. The reaction mixture was then poured into 0.1 N HCl solution and extracted with EtOAc. The combined organic layers were washed with 2 N HCl solution (3×), dried over MgSO4 and concentrated in vacuo. The residue was purified by flash chromatography (30% EtOAc:hexane) to afford N-dodecyl-3,5-bis(m-trifluoromethylphenyl)-4-(2-hydroxyethoxy)benzamide (0.254 g, 93%) as a white solid. 1H NMR (CDCl3) δ7.90 (m, 2H); 7.82-7.76 (m, 4H); 7.65-7.56 (m, 4H); 6.22 (bt, 1H); 3.45 (dd, 2H); 3.30 (m, 4H); 1.60 (m, 2H); 1.25 (m, 18H); 0.84 (m, 3H).

Provenance & Evidence