Convenient Unsymmetrical Disulfane Synthesis: Basic Zeolite-Catalyzed Thiol-Disulfane Exchange Reaction

Eiji Yamamoto, Yasutaka Kawai, Kei Takakura, Moemi Kimura, Haruno Murayama, Hironobu Matsueda, Shujiro Otsuki, Hiroshi Sakata, Makoto Tokunaga

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Convenient catalytic synthetic methods for the preparation of unsymmetrical disulfanes are described. Na-exchanged X type zeolite (Na-X), commercially available as MS-13X, effectively catalyzes thiol-disulfane exchange reactions with 1.0 equivalent of thiols and 2.5–3.0 equivalents of disulfanes at 10 °C to room temperature under air. The reactions of sterically-hindered disulfanes or electron-deficient thiol substrates require high temperatures under inert atmospheres to maintain the good product yields. Various functionalized thiols and disulfanes are tolerant in the present catalytic systems, affording the corresponding unsymmetrical disulfanes in good-to-high yields (up to 96 %). The Na-X catalyst was successfully recycled 10 times without loss of yield. Preliminary mechanistic studies suggest the involvement of base-catalyzed SN2-S displacement and/or addition-elimination mechanisms, assisted by hydrogen-bonding interactions.

Original languageEnglish
Pages (from-to)4694-4699
Number of pages6
Issue number22
Publication statusPublished - Nov 22 2021

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


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