New Methodologie Eco-Friendly Using Calcined Eggshell Meal Catalyst for Synthesis of Benzimidazoles, Benzoxazoles and Benzothiazoles

The Calcined Eggshell Meal (CEM) doped is a new solid support has been employed as a catalyst for efficient synthesis of benzimidazoles, benzoxazoles and benzothiazoles. Taking into account environmental and economical considerations, the handling of CEM used here presents many advantages such as simple and convenient procedure, easy purification and shorter reaction time and enhanced recycling possibilities, which are now well established in fine organic synthesis.