Beilstein Journal of Organic Chemistry (Dec 2014)

A one-pot multistep cyclization yielding thiadiazoloimidazole derivatives

  • Debabrata Samanta,
  • Anup Rana,
  • Jan W. Bats,
  • Michael Schmittel

DOI
https://doi.org/10.3762/bjoc.10.317
Journal volume & issue
Vol. 10, no. 1
pp. 2989 – 2996

Abstract

Read online

A versatile synthetic procedure is described to prepare the benzimidazole-fused 1,2,4-thiadiazoles 2a–c via a methanesulfonyl chloride initiated multistep cyclization involving the intramolecular reaction of an in-situ generated carbodiimide with a thiourea unit. The structure of the intricate heterocycle 2a was confirmed by single-crystal X-ray analysis and its mechanism of formation supported by DFT computations.

Keywords