Synthesis of some novel annelated 1,2,3‐selena/thiadiazoles and 2<i>h</i>‐diazaphospholes

Abstract

Abstract A number of annelated heterocyclic indene derivatives having 1,2,3‐selena/thiadiazole and 2 H ‐1,2,3‐diazaphosphole rings have been synthesized by exploiting the α‐ketomethylene functionality in some novel 1‐methyl‐piperidin‐4‐ones and 1‐oxo‐tetrahydrothiopyran‐4‐ones and were characterized by their physical and spectral data.