反应详情

Following the procedure as described in Example 9, making variations only as required to use phenethyl 4-methylbenzenesulfonate in place of 2-cyclopropylethyl 4-methylbenzenesulfonate to react with N-benzyl-5-(4-hydroxy-2-oxopyridin-1(2H)-yl)-3-methylthiophene-2-carboxamide, the title compound was obtained as a colorless solid in 59% yield: mp 159-160° C.; 1H NMR (300 MHz, DMSO-d6) δ 8.55 (t, J=5.9 Hz, 1H), 8.12 (d, J=7.9 Hz, 1H), 7.35-7.20 (m, 11H), 6.18 (dd, J=7.9, 2.6 Hz, 1H), 6.06 (d, J=2.6 Hz, 1H), 4.41 (d, J=6.0 Hz, 2H), 4.27 (t, J=6.7 Hz, 2H), 3.04 (t, J=6.6 Hz, 2H), 2.42 (s, 3H); 13C NMR (75 MHz, DMSO-d6) δ 166.3, 162.4, 161.0, 139.6, 138.8, 137.7, 137.1, 135.0, 128.8, 128.3, 128.2, 127.3, 127.1, 126.6, 126.3, 120.5, 102.4, 96.8, 68.8, 42.5, 34.2, 15.5; MS (ES+) m/z 445.3 (M+1).