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All new compounds have been fully characterized. 1H NMR (300 MHz, CDCl3), 13C NMR and APT spectral data (75 MHz, CDCl3) and elemental analysis of the key intermediates for Compound 10: white solid, mp 176-177 °C. 1H NMR: δ = 1.12 (s, 9 H, 3 CH3), 2.83 (s, 3 H, NCH3), 5.89 (d, J = 8.3 Hz, 1 H, ArH), 6.15 (d, J = 7.8 Hz, 1 H, ArH), 6.81 (t, J = 7.8 Hz, 1 H, ArH), 7.06 (t, J = 6.8 Hz, 1 H, ArH), 7.17 (t, J = 7.8 Hz, 1 H, ArH), 7.24-7.36 (m, 2 H, ArH + CHOC=O), 7.55 (d, J = 8.3 Hz, 1 H, ArH), 7.76 (d, J = 4.8 Hz, 1 H, ArH), 8.11-8.14 (m, 1 H, ArH), 9.05 (d, J = 4.8 Hz, 1 H, ArH), 9.17 (s, 1 H, ArH). 13C NMR: δ = 27.0 (3 CH3), 27.9 (CH3), 38.6 (C), 74.4 (CH), 83.4 (C), 109.9 (CH), 117.7 (CH), 122.0 (CH), 124.8 (CH),
125.6 (C), 126.8 (CH), 128.6 (CH), 128.7 (CH), 130.8 (CH), 131.4 (C), 132.5 (C), 133.8
(CH), 135.6 (C), 140.7 (C), 145.6 (CH), 146.6 (C), 151.1 (CH), 165.1 (C), 175.7 (C).
Anal. Calcd for C26H24BrN5O3 (534.42): C, 58.44; H 4.53; N, 13.10. Found: C, 58.79; H, 4.84; N, 13.37. Compound
Z-3: white solid, mp 169-170 °C. 1H NMR: δ = 1.25 (s, 9 H, 3 CH3), 3.55 (s, 3 H, NCH3), 7.25-7.47 (m, 3 H, ArH), 7.64-7.76 (m, 3 H, ArH), 8.64 (d, J = 4.9 Hz, 1 H, ArH). 13C NMR: δ = 26.8 (3 CH3), 29.4 (CH3), 39.3 (C), 116.8 (CH), 124.5 (C), 127.4 (C), 127.9 (CH), 130.0 (C), 131.8 (C), 132.0
(CH), 133.7 (CH), 134.3 (C), 134.4 (CH), 135.8 (C), 143.9 (CH), 149.3 (CH), 165.4
(C), 176.4 (C). Anal. Calcd for C20H19BrN2O3 (415.29): C, 57.84; H, 4.61; N, 6.75. Found: C, 57.61; H, 4.54; N, 6.47.