Substituent and Solvent Effects on the Photosensitized Oxygenation of 5,6-Dihydro-1,4-oxathiins. Intramolecular Oxygen Transfer vs Normal Cleavage of the Dioxetane Intermediates
作者:F. Cermola、M. R. Iesce
DOI:10.1021/jo020008m
日期:2002.7.1
ketosulfoxides 7 and 8 depending on the nature of the substituent at C3 and on the reaction conditions. The normal fragmentation of dioxetanes 2 to 4 competes with an intramolecular oxygen transfer to ring sulfur, which leads to 7 and 8, presumably via the labile epoxides 5. This new pathway is promoted by electron-withdrawing groups at C3 and, for unsubstituted and monosubstituted amide derivatives 1h and 1i
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