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Photo-rearrangements of some 3-allyloxy-2-phenyl-chromones: Synthesis of vinyl substituted benzopyronopyranes

Rupesh Kumar and Mohamad Yusuf ,

Org. Commun. (2008), 1:3 ; 39-47

Department of Chemistry, Punjabi University, Patiala 147002, India

Abstract: Photochemical reactions of some 3-allyloxy-2-phenylchromones have been studied. Photoreactions of the compounds afforded substituted pyronopyrane derivatives through the 1,4-biradicals.

Keywords: Photo-cyclisation; H-abstraction; allyloxychromones; photoreactivity