Abstract
Decarbonylation is the major reaction path for acyl-alkyl-1,4-biradical 6a formed by photochemical cleavage of the lactone O-CO bond in benzopyrandione 7a. While the α- vs β-cleavage product ratio is not affected by R = CF3 as substituntt on C(3) of the biradical (6b), ketene elimination becomes the major reaction path for 6c (R = tert-butyl).
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Hobel, K., Margaretha, P. Decarbonylation vs. ketene elimination α- vs. β-cleavage) in acyl-alkyl-1,4-biradicals. Res Chem Intermed 12, 263–268 (1989). https://doi.org/10.1163/156856789X00285
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DOI: https://doi.org/10.1163/156856789X00285