1H NMR (400 MHz, CDCl3) δ 8.21 (d, J = 7.3 Hz, 2H), 7.58 (t, J = 7.3 Hz, 1H), 7.53 – 7.45 (m, 5H), 7.45 – 7.41 (m, 2H), 7.25 (s, 1H), 4.40 (d, J = 7.4 Hz, 2H), 1.86 (dt, J = 13.7, 6.9 Hz, 1H), 0.68 (d, J = 6.7 Hz, 6H). 13C{1H} NMR (101 MHz, CDCl3) δ 184.9, 143.8, 139.0, 137.9, 132.6, 130.7, 129.6, 129.4, 129.2, 128.9, 128.9, 128.1, 52.5, 30.1, 19.6. HRMS (EI) m/z: calcd for C20H20N2O, 304.1576; found, 304.1572.
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