Photochemistry of Hemicyclone Diels-Alder Adducts of Substituted Benzoquinones

Abstract

The Diels -Alder reactions between hemicyclone and a number of substituted benzoquinones are reported. Photolysis of the products produces pentacyclo [5,4,0,0^2,6,0^3,10,0^5,9] undecane derivatives and/or 2- oxapentacyclo [6,4,0,0^1,4,0^3,7,0^5,9] dodecane derivatives depending on the substituents. X-ray crystal structures of oxetan (8) and cyanohydrin (33) are also reported.