1H NMR (400 MHz, CDCl3): δ 8.24 (d, J = 7.9 Hz, 2H), 7.47 (d, J = 7.9 Hz, 2H), 7.44 – 7.34 (m, 3H), 7.30 – 7.24 (m, 5H), 6.94 (d, J = 7.0 Hz, 2H), 5.72 (s, 2H). 13C{1H} NMR (101 MHz, CDCl3): δ 182.7, 143.5, 139.2, 138.2, 137.3, 135.8, 135.6, 132.3, 130.7, 129.6, 129.2, 128.8, 128.4, 127.6, 126.9, 125.9, 49.4. HRMS (EI) m/z: calcd for C23H16Cl2N2O, 406.0640; found, 406.0636.