Table of Contents
Organic Chemistry International
Volume 2010, Article ID 764185, 5 pages
Research Article

Effect of a Strategically Positioned Methoxy Substituent on the Photochemistry of 3-Aryl-3H-1-Oxacyclopenta[l]Phenanthren-2-Ones

1Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682022, India
2Department of Chemistry and Biochemistry, University of Missouri-St. Louis, St. Louis, MO 63121, USA

Received 29 September 2010; Accepted 24 November 2010

Academic Editor: Dipakranjan Mal

Copyright © 2010 Roshini K. Thumpakara et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Irradiation of 3-methoxy-3-aryl-3H-1-oxacyclopenta[l]phenanthren-2-one derivatives 5a–d resulted in singlet-mediated decarbonylation reaction leading to the formation of phenanthrene derivatives 9a–d. The structure of the photoproduct was unequivocally established on the basis of X-ray crystallographic analysis.