Aniline → HCID 18929250, compound

Participants

Reaction Steps

A solution of 6-chloro-2-(bromoacetamido)benzoic acid from Example 42 (7 g, 0.024 mol), aniline (5.6 g, 6 mL, 250 mol %) and DMF (40 mL) was heated at 100° C. for 5 h. The reaction mixture was cooled to rt, poured onto ice and the resulting crystalline product was solubilized by adding 5% KOH (70 mL, pH=9). The resulting milky homogenous solution was extracted with CH2Cl2 (3×100 mL), and the aqueous layer was acidified to pH=3 with 5% HBr and extracted with EtOAc (4×100 mL). Combined EtOAc washings were dried and concentrated. Recrystallization of the resulting solid from EtOAc/Hex, afforded 6 g (82%) of the title compound as white crystals, 176-178.2° C.; 1H NMR (DMSO-d6) δ 9.93 (s, 1H, COOH), 7.97 (d, 1H, J=8), 7.42 (t, 1H, J=8), 7.30 (d, 1H, J=7.6), 7.12 (t, 2H, J=7.2), 6.65 (t, 3H, J=7.2), 3.82 (s, 2H); 13C NMR (DMSO-d6) δ 170.19, 166.30, 148.15, 136.56, 131.12, 130.53, 128.98, 125.51, 121.39, 117.23, 112.71, 48.13; MS (EI, m/z) 304 (M+)

Provenance & Evidence