Triple-channel microreactor for biphasic gas–liquid reactions: Photosensitized oxygenations

• Ram Awatar Maurya,
• Chan Pil Park and
• Dong-Pyo Kim

Beilstein J. Org. Chem. 2011, 7, 1158–1163, doi:10.3762/bjoc.7.134

• illumination homogeniety of the microreactor also plays an important role. These factors make the triple-channel microreactor quite promising for photosensitized oxygenation reactions. The ratio of hydroperoxides 2 and 3 were found to be identical (1:1.5 as determined by 1 H NMR) in both the microreactor and

Synthesis of spiroannulated and 3-arylated 1,2,4-trioxanes from mesitylol and methyl 4-hydroxytiglate by photooxygenation and peroxyacetalization

• Axel G. Griesbeck,
• Lars-Oliver Höinck and
• Jörg M. Neudörfl

Beilstein J. Org. Chem. 2010, 6, No. 61, doi:10.3762/bjoc.6.61

• sensitization of triplet oxygen with meso-tetraphenylporphyrin (TPP) were performed in polystyrene beads under solvent-free conditions (Scheme 1) [18][19]. Numerous applications of the hydroperoxides 4 and 7, that result from the singlet oxygen ene reactions, have already been reported [20][21]. In context with

The Elbs and Boyland- Sims peroxydisulfate oxidations

• E. J. Behrman

Beilstein J. Org. Chem. 2006, 2, No. 22, doi:10.1186/1860-5397-2-22

• which depends on the fact that aryl hydroperoxides are rather unstable and decompose rapidly to phenols unless electron-withdrawing elements are present in the structure. Note that the last equation in Scheme 8 is left unbalanced because the oxidized products of Elbs and Boyland-Sims reactions are

• hydroperoxide forms p-nitrophenol on decomposition. Similarly, Malykhin and Shteingarts found naphthols as products from the reaction of potassium peroxide with several nitronaphthalenes. [19] These findings are then consistent with the hypothesis that aryl hydroperoxides formed by reaction of arylphenoxide