Abstract
Abstract Pyrolysates obtained from the proto-photoadducts of methyl 2,4-dioxopentanoate with olefins were shown to be 3-acetyl-1,2-cyclopentanedione derivatives. One-pot formation of polyfunctionalized cyclopentane derivatives via a photocycloaddition has no precedence. Intentional preparation of the ring system was also achieved by a diethyl azodicarboxylate–triphenylphosphine treatment of the proto-adducts.
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