ABSTRACT
Sulfur-containing heterocycles and their polycyclic derivatives comprise an important heterocyclic class that exhibit remarkable electrochemical and optical properties (Roncali 1992, 1997). Also, benzothiophenes and their conjugates have a wide range of applications in advanced materials such as conjugated polymers, semiconductors, and light-emitting devices (Huynh, Dittmer, and Alivisatos 2002). In addition, S-heterocyclic cores are found in some pharmaceuticals (Holmes et al. 1994) and display a wide range of biological activities (Al Nakib et al. 1990). Therefore, the development of new approaches for the preparation of S-heterocycles is of interest to synthetic and material scientists. Cross-dehydrogenative coupling of the aromatic C–H bond is one of the most powerful methods for the preparation of these types of heterocycles in a one-step and quantitative synthesis.
