Photorearrangement of a γ-butyrolactone: generation of intermediates in photochemical reactions

Abstract
The photolysis of 6,7,8,9-tetrahydro-9-hydroxy-7-oxo-5,8-methano-5H-benzocycloheptene-10-carboxylic acid lactone yields, in addition to CO2, naphthalene, keten, 3,4-benzotricyclo[3,3,0,02,8]octan-7-one, and benzobicyclo[2,2,2]octadienone, the same products obtained from the sensitized photolysis of benzobicyclo[2,2,2]octadienone.

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