Novel Oxa-di-π-methane and Norrish type I reactions in the S2 (π, π*) excited state of a series of β, γ-unsaturated ketones

D Armesto, MJ Ortiz, AR Agarrabeitia…

Index: Armesto, Diego; Ortiz, Maria J.; Agarrabeitia, Antonia R.; Martin-Fontecha, Mar Organic Letters, 2005 , vol. 7, # 13 p. 2687 - 2690

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Citation Number: 14

Abstract

β, γ-Unsaturated methyl ketones with electron-withdrawing groups at the γ-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 S2 (π, π*) as reactive excited states in these processes.