D. Chen et al. / Chinese Chemical Letters 21 (2010) 1326–1329
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1601.1, 1423.0, 1383.4, 1297.2; ESI-MS (m/z, %): 358.1 (M+H)+; 1H NMR (300 MHz, DMSO-d6): d 8.06 (d, 2H, J = 8.4 Hz), 7.40 (d, 2H,
J = 8.4 Hz), 7.25 (d, 1H, J = 10.8 Hz), 4.25 (s, 2H), 2.68 (s, 4H), 2.54 (s, 3H), 1.81 (s, 4H). 14c: mp: 161–163 8C; IR (KBr, cmÀ1): 3432.6,
3134.7, 2940.6, 1629.8, 1400.7, 1270.8; ESI-MS (m/z, %): 365.2 (M+H)+; 1H NMR (300 MHz, DMSO-d6): d 12.63 (s, 1H), 9.47 (br, 1H), 8.09
(d, 2H, J = 7.8 Hz), 7.46 (d, 2H, J = 7.7 Hz), 7.28 (d, 1H, J = 8.6 Hz), 7.15 (s, 1H), 6.84 (d, 1H, J = 8.6 Hz), 6.61 (s, 1H), 5.32 (s, 2H), 3.07 (q,
2H, J = 7.2 Hz), 2.59 (s, 3H), 1.29 (t, 3H, J = 6.9 Hz). 14d: mp: 120–122 8C; IR (KBr, cmÀ1): 3423.5, 3123.2, 2947.5, 2604.4, 1629.9, 1477.4,
1398.9, 1272.4; ESI-MS (m/z, %): 379.1 (M+H)+; 1H NMR (300 MHz, DMSO-d6): d 12.84 (s, 1H), 9.61 (br, 1H), 8.13 (d, 2H, J = 8.3 Hz), 7.79
(s, 1H), 7.46 (d, 2H, J = 8.3 Hz), 7.21 (d, 1H, J = 8.5 Hz), 7.02 (s, 1H), 6.85 (d, 1H, J = 8.5 Hz), 6.81 (s, 1H), 5.44 (s, 2H), 2.96 (d, 2H,
J = 6.8 Hz), 1.86 (m, 1H), 1.02 (d, 6H, J = 6.6 Hz). 14e: mp: 154–156 8C; IR (KBr, cmÀ1): 3428.0, 3142.8, 2941.5, 2604.8, 1630.7, 1476.7,
1398.7, 1272.9; ESI-MS (m/z, %): 393.1 (M+H)+; 1H NMR (300 MHz, DMSO-d6): d 12.89 (s, 1H), 9.60 (br, 1H), 8.09 (d, 2H, J = 8.0 Hz), 7.46
(d, 2H, J = 7.8 Hz), 7.28 (d, 1H, J = 8.6 Hz), 7.20 (s, 1H), 6.85 (d, 2H, J = 8.6 Hz), 6.62 (s, 1H), 5.39 (s, 2H), 2.95 (d, 2H, J = 6.7 Hz), 2.67 (s,
3H), 1.85 (m, 1H), 1.02 (d, 6H, J = 6.6 Hz). 15f: mp: 156–158 8C; IR (KBr, cmÀ1): 3427.5, 3129.2, 1629.1, 1401.9, 1265.7; ESI-MS (m/z, %):
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330.1 (M+H)+; H NMR (300 MHz, DMSO-d6): d 8.38 (d, 2H, J = 7.8 Hz), 7.83 (d, 2H, J = 8.3 Hz), 7.41 (s, 1H, J = 8.6 Hz), 6.75 (d, 1H,
J = 8.6 Hz), 4.17 (s, 2H), 2.81 (s, 3H), 2.44 (s, 6H). 15g: mp: 129–131 8C; IR (KBr, cmÀ1): 3423.6, 3128.3, 2977.0, 2603.5, 1629.6, 1399.3,
1272.8; ESI-MS (m/z, %): 356.1 (M+H)+; 1H NMR (300 MHz, DMSO-d6): d 8.43 (d, 2H, J = 7.9 Hz), 7.84 (d, 2H, J = 8.2 Hz), 7.47 (d, 1H,
J = 8.5 Hz), 6.87 (d, 1H, J = 8.7 Hz), 4.54 (s, 2H), 3.14 (s, 4H), 2.81 (s, 3H), 1.90 (s, 4H). 15h: mp: 119–121 8C; IR (KBr, cmÀ1): 3432.7,
3130.6, 1628.6, 1435.4, 1400.7, 1263.7; ESI-MS (m/z, %): 372.2 (M+H)+; 1H NMR (300 MHz, DMSO-d6): d 12.63 (s, 1H), 10.29 (br, 1H), 8.35
(s, 2H), 7.83 (d, 2H, J = 8.3 Hz), 7.35 (d, 1H, J = 8.7 Hz), 6.72 (d, 1H, J = 8.6 Hz), 4.13 (s, 2H), 3.63 (s, 4H), 2.81 (s, 3H), 2.56 (s, 4H). 15i: mp:
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129–131 8C; IR (KBr, cmÀ1): 3423.6, 3131.0, 2976.6, 2604.4, 1629.6, 1439.0, 1399.0, 1275.3; ESI-MS (m/z, %): 370.1 (M+H)+; H NMR
(300 MHz, DMSO-d6): 10.31 (br, 1H), 8.47 (s, 2H), 7.78 (d, 2H, J = 8.3 Hz), 7.50 (d, 1H, J = 8.5 Hz), 6.92 (d, 1H, J = 8.6 Hz), 4.62 (s, 2H),
3.25 (s, 4H), 3.10 (q, 2H, J = 7.2 Hz), 1.92 (s, 4H), 1.05 (t, 3H, J = 7.3 Hz). 15j: mp: 137–140 8C; IR (KBr, cmÀ1): 3422.4, 3184.9, 2958.4,
1626.8, 1433.9, 1400.0, 1262.9; ESI-MS (m/z, %): 414.1 (M+H)+; 1H NMR (300 MHz, DMSO-d6): 12.58 (s, 1H), 10.32 (br, 1H), 8.33 (d, 2H,
J = 7.8 Hz), 7.82 (d, 2H, J = 8.1 Hz), 7.35 (d, 1H, J = 8.6 Hz), 6.72 (d, 1H, J = 8.6 Hz), 4.06 (d, 2H, J = 44.9 Hz), 3.63 (s, 4H), 2.78 (d, 2H,
J = 6.9 Hz), 2.55 (s, 4H), 2.10 (m, 1H), 1.12 (d, 3H, J = 6.6 Hz), 1.01 (d, 3H, J = 6.7 Hz). 15k: mp: 150–152 8C; IR (KBr, cmÀ1): 3423.7,
3133.6, 1631.6, 1601.5, 1433.4, 1291.4; ESI-MS (m/z, %): 348.1 (M+H)+; 1H NMR (300 MHz, DMSO-d6): d 8.35 (d, 2H, J = 8.1 Hz), 7.83 (d,
2H, J = 8.1 Hz), 7.33 (d, 1H, J = 10.8 Hz), 4.11 (s, 2H), 2.81 (s, 3H), 2.35 (s, 6H). 15l: mp: 151–153 8C; IR (KBr, cmÀ1): 3421.1, 3127.8,
1633.5, 1600.4, 1428.7, 1292.5; ESI-MS (m/z, %): 374.1 (M+H)+; 1H NMR (300 MHz, DMSO-d6): d 8.42 (d, 2H, J = 8.1 Hz), 7.82 (d, 2H,
J = 8.1 Hz), 7.38 (d, 1H, J = 10.2 Hz), 4.46 (s, 2H), 2.88 (s, 4H), 2.81 (s, 3H), 1.85 (s, 4H). 15m: mp: 160–162 8C; IR (KBr, cmÀ1): 3429.7,
3124.7, 1632.8, 1452.9, 1400.9, 1270.5; ESI-MS (m/z, %): 390.1 (M+H)+; 1H NMR (300 MHz, DMSO-d6): d 8.35 (d, 2H, J = 8.1 Hz), 7.83 (d,
2H, J = 8.4 Hz), 7.34 (d, 1H, J = 11.1 Hz), 4.14 (s, 2H), 3.64 (m, 4H), 2.81 (s, 3H), 2.58 (m, 4H). 15n: mp: 160–162 8C; IR (KBr, cmÀ1):
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3421.6, 3142.4, 2960.4, 1604.2, 1559.7, 1400.6, 1278.7; ESI-MS (m/z, %): 409.1 (M+H)+; H NMR (300 MHz, DMSO-d6): d 8.35 (d, 2H,
J = 8.3 Hz), 7.84 (d, 2H, J = 8.2 Hz), 7.39 (d, 1H, J = 8.6 Hz), 7.06 (s, 1H), 6.88 (d, 1H, J = 8.6 Hz), 6.61 (s, 1H), 5.33 (s, 2H), 2.78 (d, 2H,
J = 6.9 Hz), 2.56 (s, 3H), 2.15–2.04 (m, 1H), 1.11 (d, 3H, J = 6.6 Hz), 1.01.(d, 3H, J = 6.7 Hz).