Cobalt-Catalyzed Synthesis of Functionalized Nordazepams and Benzimidazoquinazolines and Their Photophysical Properties

An efficient and environmentally friendly one-pot sequential synthesis of functionalized nordazepam and a benzimidazoquinazoline analogue is reported, utilizing cobalt as the metal catalyst. The reaction proceeds via either the alpha-alkenylation or dehydrogenative sp3 C-H functionalization pathway. This transformation includes mild reaction conditions, operational simplicity, and good functional group tolerance. Additionally, this method is suitable for the gram-scale synthesis of functionalized nordazepam and benzimidazoquinazoline compounds. Furthermore, the synthetic utility, photophysical properties and real-life application of the synthesized derivatives were explored.