4.7 Article

Solvent-free ruthenium trichloride-mediated [2+2+2] cycloaddition of α,ω-diynes and cyanamides: a convenient access to 2-aminopyridines

Journal

ORGANIC CHEMISTRY FRONTIERS
Volume 4, Issue 6, Pages 1063-1068

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c7qo00058h

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Funding

  1. M.E.N.E.S.R. (Ministere de l'Education Nationale, de l'Enseignement Superieur et de la Recherche)
  2. Centre National de la Recherche Scientifique (CNRS)
  3. China Scholarship Council (CSC)

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A convenient access to functionalized 2-aminopyridines via a solventless Ru-catalyzed [2 + 2 + 2] cyclo-addition reaction of alpha,omega-diynes and cyanamides is described. This transformation efficiently proceeds in the presence of a stable, easy to handle, and cost-effective RuCl3 center dot nH(2)O complex, leading to various 2-aminopyridines in good to excellent yields according to an eco-friendly, straightforward approach.

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