Photolysis of 2,4-dimethyl-1-phenylpentane-1,3-dione (1) in the presence of oxygen gave 2,2,4-trimethyl-5-phenylfuran-3(2H)-one (2) and 6-hydroxy-3,3,5-trimethyl-6-phenyl-1,2-dioxan-4-one (3)via the interaction of the type II biradical with oxygen.
M. Yoshioka, M. Oka, Y. Ishikawa, H. Tomita and T. Hasegawa, J. Chem. Soc., Chem. Commun., 1986, 639 DOI: 10.1039/C39860000639
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