Journal
RSC ADVANCES
Volume 5, Issue 86, Pages 70604-70608Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra14671b
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Funding
- CSIR, New Delhi, India
- DRILS
- CSIR [02(0127)/13/EMR-II]
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Quinoxaline has been identified as a new directing group for the Pd (or Ru)-catalyzed ortho C-H alkenylation of aniline derivatives and subsequent hypervalent iodine promoted intramolecular ortho C-H cycloamination of the resulting N-arylquinoxalin-2-amine derivatives. This two-step strategy afforded alkenyl substituted benzo[4,5] imidazo [1,2-a] quinoxalines as inhibitors of PDE4. The Pd-catalyzed ortho C-H alkenylation of phenol derivatives was also performed successfully when quinoline was found to be an effective directing group.
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