Photocyclisations of some 3-alkoxy-2-thienylchromones
作者:Mohamad Yusuf、Rupesh Kumar、S. C. Gupta
DOI:10.1002/jhet.5570450403
日期:2008.7
Photoreorganisations of some 3-allyloxy-2-thienylchromones have been described. The photoreactions are initiated through the intramolecular H-abstraction to provide angular tetracyclic compounds. These chromones yield good chemical efficiency due to the involvement of highly stabilized allylic 1,4-biradicals.