A New Experimental Protocol for Intrazeolite Photooxidations. The First Product-Based Estimate of an Upper Limit for the Intrazeolite Singlet Oxygen Lifetime
作者:Andrea Pace、Edward L. Clennan
DOI:10.1021/ja027053w
日期:2002.9.1
interior of the zeolite was documented. The nearly identical reaction rates in the two slurry solvents are attributed to a leveling of the singletoxygenlifetime by the zeolite framework. A consideration of the rates of the various intrazeolite processes was used to estimate an upper limit for the intrazeolite lifetime of singletoxygen.
Singlet oxygen addition to homoallylic substrates in solution and microemulsion: novel secondary reactions
作者:Axel G. Griesbeck、Miyeon Cho
DOI:10.1016/j.tetlet.2008.10.094
日期:2009.1
The photooxygenation of three homoallylic substrates, the γ,δ-unsaturated ketone 1a, nitrile 2a, and the γ,δ-unsaturated ester 3a was investigated in homogeneous solution and in microemulsion (for 1a). Two secondary reaction pathways were detected for the allylic hydroperoxides of type b and c, respectively. The cyclization reactions of 1b and 2b to the 1,2-dioxanes 1d and 2d followed well-known reaction
Intrazeolite Photooxidations of Electron-Poor Alkenes
作者:Edward L. Clennan、Jakub P. Sram、Andrea Pace、Katie Vincer、Sophia White
DOI:10.1021/jo025657c
日期:2002.5.1
The inability of the intrazeolite environment to influence the regiochemistry of addition of singlet oxygen to electron-poor olefins is reported. This divergent behavior with respect to electron-rich alkenes is rationalized with a multicomplexation model that emphasizes the importance of intrazeolite substrate-cation binding.