Indion 190 resin: Reusable catalyst for the synthesis of quinoxalines and pyrido-pyrazines at ambient temperature

@article{Meshram2013Indion1R,
  title={Indion 190 resin: Reusable catalyst for the synthesis of quinoxalines and pyrido-pyrazines at ambient temperature},
  author={Gangadhar Meshram and Shruti S. Deshpande and Vipul A. Vala and P. Wagh},
  journal={European Journal of Chemistry},
  year={2013},
  volume={4},
  pages={422-424}
}
An efficient method for synthesis of quinoxalines and substituted pyrido-pyrazines has been developed from different 1,2-dicarbonyl compounds and substituted 1,2-diamines using Indion 190 resin as a solid acid catalyst. Ambient reaction conditions, high product yield and reusability of the catalyst with minimal loading are the salient features of the present protocol. 
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The synthesis of benzimidazoles and quinoxalines from aromatic diamines and alcohols by iridium-catalyzed acceptorless dehydrogenative alkylation.
TLDR
The synthesis of both classes of compounds starting from aromatic diamines and alcohols (benzimidazoles) or diols (quinoxalines) is reported, with the highest catalytic activity for both reactions.
6-6 Bicyclic Systems: Three Heteroatoms 1:2

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