Benzimidazole is a benzo derivative of imidazole. It is a kind of bicyclic aromatic organic compounds, which is formed by fusing a six-membered benzene ring and five-membered imidazole at positions 4 and 5 of imidazole ring. It is an important pharmacophore of many biologically active heterocyclic compounds with various pharmacological activities. Benzimidazoles and their derivatives have developed into dynamic heterocyclic systems due to their potency in a variety of biologically active compounds such as anticancer, bactericidal and antiviral drugs. Benzimidazoles are a class of therapeutic motifs with broad relevance in medicinal chemistry.
Benzothiazines are well‐recognized compounds in medicinal chemistry, and many derivatives have been explored as target structures in drug development. Fused-benzothiazines are of much interest for various fields of science as these scaffolds demonstrate a wide spectrum of biological applications like anti-microbial, anti-malarial, anti-cancer, anti-viral, ant-oxidant, anti-inflammatory, etc.
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