Water → N-hydroxy-4-[2-(benzofuran-2-yl-carbonylamino)-ethoxy]-benzamide

関与物質

反応手順

A mixture of benzofuran-2-carboxylic acid (0.162 g, 1 mmol), EDC.HCl (0.268 g, 1.4 mmol) and HOBT.H2O (0.203 g, 1.5 mmol) in DMF (6 ml) was stirred for 2 h. Methyl 4-(2-aminoethoxy)benzoate hydrochloride (0.232 g, 1 mmol) was added followed by triethylamine (0.121 g, 1.2 mmol). The reaction mixture was stirred for 2 h and then diluted with ethyl acetate, washed with saturated sodium bicarbonate solution, and brine. The organic layer was concentrated in vacuo and the crude 4-[2-(benzofuran-2-ylcarbonylamino)ethoxy]-benzoate was converted to the title compound as described in Example 1, Step 5 above. 1H NMR (DMSO-d6) δ 11.05 (s, 1H), 8.92 (t, J=5.6 Hz, 1H), 8.88 (s, 1H), 7.76 (d, J=8.0 Hz, 1H), 7.70 (d, J=9.2 Hz, 2H), 7.64 (d, J=8.0 Hz, 1H), 7.55 (s, 1H), 7.46 (t, J=6.8 Hz, 1H), 7.32 (t, J=8.0 Hz, 1H), 7.01 (d, J=8.2 Hz, 2H), 4.18 (t, J=5.6 Hz, 2H), 3.67 (m, 2H). EM (calc.): 340.1; MS (ESI) m/e: (M+1H)+: 341.0, (M−1H)−: 339.1.

情報源と証拠