Thiyl Radicals: Versatile Reactive Intermediates for Cyclization of Unsaturated Substrates

Dylan M. Lynch, Eoin M. Scanlan (Lead / Corresponding author)

Research output: Contribution to journalReview articlepeer-review

15 Citations (Scopus)
68 Downloads (Pure)


Sulfur centered radicals are widely employed in chemical synthesis, in particular for alkene and alkyne hydrothiolation towards thioether bioconjugates. The steadfast radical chain process that enables efficient hydrothiolation has been explored in the context of cascade reactions to furnish complex molecular architectures. The use of thiyl radicals offers a much cheaper and less toxic alternative to the archetypal organotin-based radical methods. This review outlines the development of thiyl radicals as reactive intermediates for initiating carbocyclization cascades. Key developments in cascade cyclization methodology are presented and applications for natural product synthesis are discussed. The review provides a chronological account of the field, beginning in the early seventies up to very recent examples; a span of almost 50 years.

Original languageEnglish
Article number3094
Number of pages40
Issue number13
Publication statusPublished - 7 Jul 2020


  • Carbocyclization
  • Cyclisation
  • Radical
  • Sulfur
  • Thiyl radicals

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Pharmaceutical Science
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry


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