“…Data was consistent with that reported in the literature. 26 2,2′-Biquinoline (2r). The product was isolated as a white solid in 72% yield (461 mg): mp =193−195 °C; R f = 0.66 (petroleum ether/ ethyl acetate = 3:1); 1 H NMR (400 MHz, CDCl 3 ) δ 8.81 (d, J = 8.6 Hz, 2H), 8.28 (d, J = 8.6 Hz, 2H), 8.20 (d, J = 8.3 Hz, 2H), 7.83 (d, J = 8.1 Hz, 2H), 7.70 (t, J = 7.2 Hz, 2H), 7.52 (t, J = 7.4 Hz, 2H); 13 C NMR (100 MHz, CDCl 3 ) δ 150.0, 146.5, 136.8, 130.2, 127.7, 127.1, 125.8, 122.4, 121.6.…”