“…96-97 °C). [44] 1 H NMR (400 MHz, CDCl 3 ): δ = 7.75 (d, J = 7.3 Hz, 2H), 7.51 (t, J = 7.3 Hz, 1H), 7.43 (t, J = 7.5 Hz, 2H), 6.56 (br s, 1H), 3.71 (q, J = 6.4 Hz, 2H), 2.46 ppm (qt, J = 10.8, 6.4 Hz, 2H). 13 C NMR (126 MHz, CDCl 3 ): δ = 167.9, 134.1, 131.9, 128.8, 127.0, 126.7 (q, J = 276.9 Hz), 33.8 (q, J = 27.7 Hz), 33.7 ppm (q, J = 3.8 Hz).…”