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Communication | Regular issue | Vol 24, No. 11, 1986, pp.3031-3037
Published online, 1st January, 1970
DOI: 10.3987/R-1986-11-3031
Isolation of Photo-Diels-Alder Mono-adducts of 4,6-Dimethyl-2-pyrone and Formation of Cross-adducts

Tetsuro Shimo, Hiroyuki Yoshimura, Hisako Uemura, Kenichi Somekawa,* and Otohiko Tsuge

*Department of Applied Chemistry, Faculty of Engineering, Kagoshima University, Korimoto, Kagoshima 890, Japan

Abstract

The Diels-Alder mono-adducts between 4,6-dimethyl-2-pyrone and olefinic dienophiles could be isolated from the low temperature photochemical reactions. The adducts reacted with second olefins to afford cross-adducts with the concurrent decarboxylation. Irradiation of the cross-adducts to p-benzoquinone gave cage compounds.