Triphenylphosphine → 4-{2-[3-Bromo-5-(8-phenyl-octylcarbamoyl)-3'-trifluoromethyl-biphenyl-2-yloxy]-ethoxy}-2-hydroxy-benzoic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of N-(8-phenyl-octyl)-3-bromo-5-(m-trifluoromethylphenyl)-4-(2-hydroxyethoxy)-benzamide (0.687 g, 1.16 mmol, 1 eq) in THF (10 mL) was added triphenylphosphine (0.680 g, 2.59 mmol, 2.23 eq) and methyl 2,4 dihydroxybenzoate (0.388 g, 2.30 mmol, 2.0 eq). The reaction was cooled to 0° C. and diethyl azodicarboxylate (0.220 mL, 1.40 mmol, 1.2 eq) was added. The cold bath was removed and the reaction was stirred overnight at rt. The reaction mixture was then poured into 0.1 N HCl solution and extracted with EtOAc. The combined organic layers were washed with brine, dried over MgSO4 and concentrated in vacuo. The residue was purified by flash chromatography (20% EtOAc:hexane) to afford 4-{2-[3-Bromo-5-(8-phenyl-octylcarbamoyl)-3′-trifluoromethyl-biphenyl-2-yloxy]-ethoxy}-2-hydroxy-benzoic acid methyl ester 1H NMR (CDCl3) δ11.90 (s, 1H); 7.97 (d, 1H); 7.84-7.50 (m, 6H); 7.28-7.12 (m, 5H); 6.40 (m, 1H); 6.24 (m, 1H); 6.10 (bt, 1H); 4.12 (dd, 2H); 4.00 (m, 2H); 3.92 (s, 3H); 3.45 (dd, 2H); 2.59 (t, 2H); 1.60 (m, 4H); 1.33 (m, 8H).

Provenance & Evidence