Telluropyran and telluropyrylium derivatives, their preparation, and reactivity

Abstract

Telluropyran and telluropyrylium derivatives are organotellurium compounds featuring a tellurium atom integrated into a pyran or pyrylium ring system. These compounds are of interest due to their unique electronic properties and potential applications in various fields such as materials science, catalysis, and medicine.

When benzene, indene and/or thiophene are fused with the b edge of 4H-telluropyran, four distinct condensed telluropyrans structures can be identified. These include 7H-telluropyrano[3,2-b]thiophene, 4H-tellurochromene, 9H-telluroxanthene and 9-dihydroindeno[2,1-b]telluropyran and 9H-tellurochromeno-[3,2-b]thiophene. The synthesis of telluropyran derivatives is achievable through various chemical pathways, encompassing Suzuki coupling reactions, Stille coupling reactions, and Sonogashira coupling reactions.