Journal
SYNLETT
Volume 24, Issue 8, Pages 1016-1020Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0032-1316898
Keywords
phenanthridin-6(5H)-ones; Cu-catalyzed; cyclization; 2-phenylbenzamides; air
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Funding
- National Science Foundation of China [21072051]
- NCET program [NCET-09-0334]
- Fundamental Research Funds for the Central Universities, Hunan University
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Synthesis of phenanthridin-6(5H)-ones was achieved via copper-catalyzed cyclization of 2-phenylbenzamides using air as the oxidant and KOt-Bu as the base. It was discovered that, besides Ph3P, other ligands such as 1,10-phenanthroline, TMEDA as well as L-proline could also be used as the ligand to effect the transformation.
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