Novel Oxa-di-π-methane and Norrish Type I Reactions in the S<sub>2</sub> (π,π*) Excited State of a Series of β,γ-Unsaturated Ketones
作者:Diego Armesto、Maria J. Ortiz、Antonia R. Agarrabeitia、Mar Martín-Fontecha
DOI:10.1021/ol050846d
日期:2005.6.1
[reaction: see text] Beta,gamma-unsaturated methyl ketones with electron-withdrawing groups at the gamma-position of the ene moiety undergo ODPM rearrangements and Norrish type I reactions on direct irradiation at 254 nm. The results are consistent with the involvement of alkene S(2) (pi,pi*) as reactiveexcitedstates in these processes.