An unprecedented 'carbonyl-O-assisted' 1,3-H atom transfer from a CH2 group to a primary alkyl radical center in 1,4-biradicals, formed in a crossed addition mode in the photocycloisomerization of 4-pent-4-enylcyclohex-2-enones, is discussed.
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http://dx.doi.org/10.1039/b403724c | DOI Listing |
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