1-Hydroxybenzotriazole → N-{2-[4-(2-bromo-phenylamino)-piperidin-1-yl]-2-oxo-ethyl}-4-phenylamino-benzamide

Participants

Reaction Steps

To a stirred solution of (4-phenylamino-benzoylamino)-acetic acid (0.074 g, 0.00027 mol) in DMF (5 mL) was added DIPEA (0.088 g, 0.0006827 mol), HOBt (0.036 g, 0.00027 mol) and EDCI.HCl (0.065 g, 0.00034 mol) at ambient temperature. After 2 minutes (2-bromo-phenyl)-piperidin-4-yl-amine dihydrochloride (0.066 g, 0.00023 mol) and the resulting mixture was stirred overnight. The reaction mixture was then diluted with cold water and the product was extracted with ethyl acetate. The ethyl acetate layer was washed with brine solution, dried over sodium sulfate and concentrated under reduced pressure. The resulting residue was purified by column chromatography using silica gel 60-120 mesh (60% ethyl acetate in hexane) to afford 0.036 g (31%) of N-{2-[4-(2-bromo-phenylamino)-piperidin-1-yl]-2-oxo-ethyl}-4-phenylamino-benzamide. LCMS: 507.13 (M+1)+, 96.75%, 1H NMR (DMSO-d6): δ 8.6 (s, 1H), 8.2 (t, 1H), 7.8 (d, 2H), 7.4 (dd, 1H), 7.3 (t, 2H), 7.2 (m, 3H), 7.1 (d, 2H), 6.9 (t, 1H), 6.8 (d, 1H), 6.6 (t, 1H), 4.6 (d, 1H), 4.3 (d, 1H), 4.1 (d, 2H), 3.9 (d, 1H), 3.6 (s, 1H), 3.2 (m, 3H), 2.8 (m, 2H), 2.0 (m, 3H).

Provenance & Evidence