“…Phenylbenzo[d]imidazo[2,1-b]thiazole (3a)28 Yield: 95%, white solid; mp: 88-90 C, R f : 0.5% (40% EtOAc/n-Hexane);1 H NMR (400 MHz, CDCl 3 ) 7.87 (s, 1H), 7.79 (d, J ¼ 7.52 Hz, 2H), 7.60 (d, J ¼ 7.96 Hz, 1H), 7.50 (d, J ¼ 8.0 Hz, 1H), 7.37-7.32 (m, 3H), 7.24-7.18 (m, 2H); 13 C NMR (100 MHz, Scheme 4 A plausible mechanism for the syntheses of benzo[d]imidazo[2,1-b]thiazole derivatives. This journal is © The Royal Society of Chemistry 2020 RSC Adv., 2020, 10, 770-778 | 775 Paper RSC Advances Open Access Article.…”