反应详情

Following the procedure described in Example 14, step 3, but substituting carboxylic acid 50b for 37 and using 1.1 equivalent of NH2OH.HCl and triethylamine each, the title compound was obtained as light yellow solid in 48% yield: 1H NMR (300 MHz, CD3OD/CDCl3=5/1) δ 7.94 (d, J=9.0 Hz, 2H), 6.95 (d, J=9.0 Hz, 2H), 3.88 (s, 3H), 2.93 (t, J=7.2 Hz, 2H), 2.11 (t, J=7.5 Hz, 2H), 1.59-1.79(m, 4H), 1.37 (m, 4H); 13C NMR (75.4 MHz, CD3OD/CDCl3=5/1) δ 24.15, 25.04, 28.59(2), 32.51, 37.88, 55.21, 113.54, 129.58, 130.20, 163.39, 171.10, 200.06.