36156-91-9Relevant academic research and scientific papers
Photooxygenation of Silyl Ketene Acetals: Dioxetanes as Precursors to α-Silylperoxy Esters in the Silatropic Ene Reaction
Adam, Waldemar,Wang, Xiaoheng
, p. 4737 - 4741 (2007/10/02)
Photooxygenation of silyl ketene acetals afforded dioxetanes, which subsequently underwent secondary reactions to give rearrangement products (α-silylperoxy esters, major products) and cleavage products (pivalaldehyde, minor product).The kinetics of these reactions were studied by NMR and chemiluminescence.The activation energy of the chemiluminescence cleavage process was 2-3 kcal/mol higher than that of the rearrangement.In the presence of catalytic amounts of CF3COCF3 or CF3COCH3, the (E)-silyl ketene acetals rearranged into their Z isomers.Photooxygenation of the (E)- and (Z)-silyl ketene acetals showed that the cycloaddition was rigorously diastereoselective.Trapping experiments with acetaldehyde confirmed the intermediacy of 1,4-zwitterions in the rearrangement of the (E)- and (Z)-dioxetanes into α-silylperoxy esters, but such intermediates were not detected during the photooxygenation of the silyl ketene acetals; the latter proceeds presumably via perepoxides.
The synthesis of 1, 2, 4-trioxan-5-ones
Jefford, Charles W.,Currie, Jane,Richardson, Geoffrey D.,Rossier, Jean-Claude
, p. 1239 - 1246 (2014/12/12)
Several 3,6-substituted 1, 2, 4-trioxan-5-ones have been prepared in good yield by condensing aldehydes and ketones with trimethylsilyl α-[(trimethylsilyl)peroxy]alkanoates in the presence of trimethylsilyl trifluoromethanesulfonate as catalyst.
