Tetrahydrofuran → HCID 9875187, compound

Participants

Reaction Steps

To a suspension of N-dodecyl-3-bromo-4-hydroxy-5-(m-trifluoromethylphenyl)-benzamide (1.799 g, 1.51 mmol, 1 eq) in 0.05 N tris(hydroxymethyl)aminomethane pH 9 buffer/THF (10:3) (7.5 mL) was added 2.5 N NaOH (0.665 mL, 1.66 mmol, 1.1 eq) and THF (10 mL). The reaction was stirred at rt for 30 minutes and then cooled to 5° C. 4-Chlorosulfonyl-2-hydroxy-benzoic acid (0.715 g, 3.02 mmol, 2 eq) was added portionwise while keeping the pH at 9 by the addition of 2.5 N NaOH. This mixture was allowed to warm to rt and to stir for 2 days. The reaction was quenched by the addition of 2 M 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 (30% EtOAc:hexane+1% Formic Acid) to afford the title compound (0.895 g, 79%) as a yellow foam. 1H NMR (DMSO-d6) δ 11.40 (bs, 1H); 10.35 (bs, 1H); 8.70 (t, 1H); 8.22 (d, 1H); 7.85 (d, 1H); 7.72–7.45 (m, 5H); 6.98 (dd, 1H); 6.86 (d, 1H); 3.25 (dd, 2H); 1.50 (dd, 2H); 1.25 (m, 18H); 0.85 (t, 3H); IR (KBr) 3410, 2800, 2700, 1690, 1640, 1605, 1390, 1330, 1180, 1120, 620, 600 cm1; mass spectrum [(+)APCI], m/z 728/730 (M+H)+; Anal. Calcd. for C33H37BrF3NO7S+0.25 C4H8O2: C, 54.40; H, 5.24; N, 1.87. Found: C, 53.23; H, 4.77; N, 1.79.

Provenance & Evidence