4-Iodoaniline → HCID 67486301, compound

Participants

Reaction Steps

To a stirred suspension of 4-[2-carboxy-2-(4-hydroxy-phenyl)-ethyl]-benzoic acid methyl ester (Step C, 1.5 g, 5.0 mmol) in anhydrous CH2Cl2 (10 mL), was added oxalylchloride (1.57 g, 12.5 mmol) at rt, the reaction mixture was stirred for 14 h. The reaction mixture was concentrated under reduced pressure and azeotroped with CH2Cl2 (2×10 mL) dried under vacuum for 3 h, The crude acid chloride (1.8 g, 5.66 mmol) was treated with 4-iodoaniline (1.48 g, 6.79 mmol) and N,N-diispropylethylamine (3.0 mL, 16.9 mmol) in CH2Cl2 at 0° C. The reaction mixture was stirred for 14 h at rt and the reaction mixture was concentrated under reduced pressure. The mixture was extracted with ethyl acetate (100 mL) and the organic layer was washed with brine, dried over Na2SO4 and concentrated under reduced pressure. The residue was treated with CH2Cl2 to get solid compound, which was filtered and washed with CH2Cl2 to give 4-[2-(4-hydroxy-phenyl)-2-(4-iodo-phenyl-carbamoyl)-ethyl]-benzoic acid methyl ester as a yellowish solid (1.6 g, 64%): 1H NMR (300 MHz, DMSO-d6): δ 10.05 (s, 1H, NH), 9.28 (s, 1H, OH), 7.81 (d, J=8.1 Hz, 2H), 7.53 (d, J=8.7 Hz, 2H), 7.31 (t, J=8.4 Hz, 4H), 7.18 (d, J=8.4 Hz, 2H), 6.65 (d, J=8.4 Hz, 2H), 3.85 (t, J=6.9 Hz, 1H), 3.77 (s, 3H), 3.40-3.36 (m, 1H), 2.95 (dd, J=6.0, 12.9 Hz, 1H); TLC conditions: Uniplate silica gel, 250 microns; mobile phase=ethyl acetate/hexanes (1:2); Rf=0.5.

Provenance & Evidence