Professor, Department of Chemistry, Faculty of Science, Cairo University, Egypt. Research interests: Synthesis and characterization of new heterocyclic compounds, especially those containing nitrogen, oxygen and sulfur atoms. Development of new synthetic methodologies for the construction of heterocyclic ring systems. Studies on the biological activity of newly synthesized heterocyclic compounds. Over 100 publications in international journals. Supervised over 30 MSc and 15 PhD theses. Member of the Editorial Board of the Journal of Heterocyclic Chemistry.