1997
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Abstract: The cyclopropylmethyl and (trans-2-phenylcyclopropyl)methyl radical clocks were used to estimate the lifetimes of triplet state biradicals formed from substituted 1-alkoxy-9,10-anthraquinones by photoexcitation and subsequent 1,5-hydrogen atom transfer. Irradiation (350 nm) of 1-(cyclopropylmethoxy)-2-methyl-9,10-anthraquinone (1cp) in argon-purged methanol generated the primary anthrahydroquinone product (2). Upon exposure to air, 2 was rapidly converted to cyclopropanecarboxaldehyde and 1-hydroxy-2-X-9,10-an… Show more

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