Synthesis of 2,3‐dihydro‐6H‐1‐oxa‐3a‐aza‐phenalene and its benzo/hetero‐fused analog

Abstract

A simple and efficient method for the synthesis of highly substituted benzo‐ and hetero‐fused analog of 2, 3‐dihydro‐6H‐oxa‐3a‐aza‐phenalene was developed using 2H‐1, 4‐benzoxazine and α‐oxoketene dithio‐acetals. J. Heterocyclic Chem., (2011).