4.7 Article

(2+1+1+1)-Annulation Reactions of Aryldiazonium Tetrafluoroborates with Sulfur Ylides to Polysubstituted Pyrazoles

Journal

JOURNAL OF ORGANIC CHEMISTRY
Volume 86, Issue 13, Pages 8997-9006

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.1c00949

Keywords

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Funding

  1. Zhejiang Provincial Natural Science Foundation of China [LY20H300001]
  2. Agricultural and Social Development Fundation of Hangzhou Science and Technology Committee [20201203B148]
  3. Medical Health Science and Technology Project of Zhejiang Provincial Health Commission [2020KY681, 2020KY679, 2019RC085]
  4. Scientific Research Foundation of Zhejiang University City College [J-20011, J-20010]
  5. Hangzhou Municipal University

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A novel divergent domino annulation reactions of sulfur ylides with aryldiazonium tetrafluoroborates have been developed, producing various tetra- and trisubstituted pyrazole derivatives in moderate to good yields. In these one-pot reactions, three molecules of sulfur ylides were used as C-1 synthon to construct complex products with five new chemical bonds formed.
Novel divergent domino annulation reactions of sulfur ylides with aryldiazonium tetrafluoroborates have been developed, affording various tetra- and trisubstituted pyrazole derivatives in moderate to good yields. Three molecules of sulfur ylides were applied as C-1 synthon to construct the complex products with five new chemical bonds formed in these one-pot reactions.

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