Photochemical reactions. 147th Communication. Further investigation of the photochemistry of 5,6-epoxy-5,6-dihydro-?-ionone: Product formationvia a carbonyl-ylide intermediate
作者:Anthony O'Sullivan、Bruno Frei、Oskar Jeger
DOI:10.1002/hlca.19860690305
日期:1986.5.7
On π,π*-excitation of the epoxyenone (E)-1 (λ = 254 nm, MeCN), in addition to the previously isolated compounds 2–9, the new products 10–12, derived from the ylide intermediate c were isolated. Further evidence for the ylide c was obtained by the rapid racemization of the optically active epoxyenone (−)-(E)-1.
Selective allylic electro-oxidation of α- and β-ionones
作者:Antonio Guirado、Gerard P. Moss、James H. P. Utley
DOI:10.1039/c39870000041
日期:——
Allylic ring substitution of α- and β-ionones by, respectively, anodically generated cobalt(III) acetate and bromine, is selective and efficient; in contrast direct anodic oxidation is unselective but provides a route to the novel, rearranged, carotenoid end group (7).