1. Department of Chemistry, Bharathiar University, Coimbatore, Tamil Nadu, India;2. Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
Abstract:
A new method was adopted for the synthesis of benzo[b]carbazoles by Claisen condensation followed by Fischer indole cyclization. Newly synthesized benzo[b]carbazoles were treated with ethanol amine in the presence of polyphosphoric acid which leads to the formation of pyrazino carbazoles. All the synthesized compounds were characterized by all spectral means.