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18 MS: m/z found
M+ 256.10991; C16H16O3 requires 256.10995.
IR: νmax = 3069, 2976, 2932, 1735,
1606, 1589, 1485, 1465, 1451, cm-1. 1H
NMR (400 MHz, CDCl3): δ = 1.40 (d,
6 H, J = 6.4
Hz), 4.59 (sept., 1 H, J = 6.4
Hz), 6.88 (m, 3 H), 7.35 (m, 1 H), 7.54 (m, 2 H), 7.66 (m, 1 H),
8.28 (m, 2 H) ppm. 13C NMR (100 MHz,
CDCl3): δ = 24.23 (Me), 72.29 (CH),
111.67 (CH), 115.71 (CH), 115.89 (CH), 130.86 (2 × Me),
131.83 (C), 132.16 (CH), 132.39 (2 × CH),
135.87 (CH), 154.24 (C), 161.17 (C), and 167.26 (C=O) ppm.
19 MS: m/z found M+ 152.08346;
C9H12O2 requires 152.08346. IR: νmax = 3385,
2976, 2932, 1595, 1490 cm-1. 1H
NMR (400 MHz, CDCl3): δ = 1.32 (d,
6 H, J = 6.0
Hz), 4.51 (sept., 1 H, J = 6.0
Hz), 6.40 (m, 2 H), 6.47 (m, 1 H), 7.11 (m, 1 H) ppm. 13C
NMR (100 MHz, CDCl3): δ = 22.43 (2 × Me),
70.36 (CH), 103.71 (CH), 107.95 (CH), 108.69 (CH), 130.48 (CH),
157.15 (C), and 159.66 (C) ppm.
20 Mp 118 ºC. MS (FAB): m/z (%) = 202
(100) [M + H+] found 202.0868,
C12H12NO2 requires 202.0868. Found:
C, 71.61; H, 5.47; N, 6.88%. C12H11NO2 requires
C, 71.63; H, 5.51; N, 6.96%. IR (KBr): νmax = 3058
(br), 2731, 2611, 1617, 1600, 1572, 1439, 1380, 1300, 1243, 1179,
1157, 1061, 749 cm-1. 1H
NMR (400 MHz, d
6-acetone): δ = 5.14
(s, 2 H), 6.46 (ddd, 1 H, J = 1.0,
2.2, 8.0 Hz), 6.50-6.52 (m, 2 H), 7.07-7.12 (m, 1
H), 7.28-7.32 (m, 1 H), 7.52, (br d, 1 H, J = 9.2
Hz), 7.81 (ddd, 1 H, J = 1.8,
7.7, 7.7 Hz), 8.45 (br s, 1 H,), and 8.57 (ddd, 1 H, J = 1.0, 1.7,
4.8 Hz) ppm. 13C NMR (100 MHz, CDCl3): δ = 71.3
(CH2), 103.1 (CH), 106.8, (CH), 109.1 (CH), 122.1 (CH),
123.5 (CH), 130.8 (CH), 137.5 (CH), 150.0 (CH), 158.4 (C), 159.6
(C), and 160.8 (C) ppm.