Mechanistic Studies on the Photogenerated Dienol with α-Phenyl-<i>N-tert</i>-Butylnitrones
作者:Kai Pan、Tong-Ing Ho
DOI:10.1002/jccs.199700037
日期:1997.6
AbstractThe mechanism for the photochemical reactions of o‐methyl‐benzaldehyde (1), o‐methyl‐acetophenone (2) and o‐methyl‐benzophenone (3) in the presence of α‐phenyl‐N‐tert‐butylnitrone (PBN) to the formation of stable nitroxyl radicals 4–6 is studied.The nitroxyl radical product 6 can also be obtained by the thermolysis of benzocyclobutenol with PBN. Thus, the radical products were derived from a novel and regioselective 4+2 cycloaddition of the photogenerated dienol intermediate with PBN.
Forrester,A.R. et al., Journal of the Chemical Society. Perkin transactions I, 1979, p. 621 - 631