311-38-6Relevant academic research and scientific papers
Study of selectivity of metal phosphates and phosphonates in Baeyer-Villiger oxidations
Rocha, Graca M. S. R. O.,Santos, Teresa M.,Bispo, Claudia S. S.
experimental part, p. 100 - 110 (2011/10/05)
Layered materials including metal phosphates and phosphonates have been widely investigated in several fields acting as good selective catalysts in a great number of oxidative reactions. Zirconium phosphate amorphous [Zr(HPO 4)2?H2O; ZrPA], sodium exchanged zirconium phosphate amorphous [Zr(NaPO4)2; NaZrPA], potassium exchanged zirconium phosphate amorphous [Zr(KPO4)2; KZrPA], zirconium phenylphosphonate amorphous [Zr(O3PC 6H5)2; ZrPPA], zirconium carboxyethylphosphonate [Zr(O3PCH2CH2COOH) 2; ZrCEP] and aluminium carboxyethylphosphonate [Al 3(OH)3(O3PCH2CH2CO 2)2?3H2O; AlCEP] were prepared, characterized and evaluated as selective catalysts in the Baeyer-Villiger oxidation of cyclopentanone, p-methoxybenzaldehyde and 2,4,6- trimethylbenzaldehyde by hydrogen peroxide, in acetic acid. The selectivity of δ-valerolactone, p-methoxyphenol and 2,4,6-trimethylphenol have been found to be strongly related with the properties and structure of each catalyst. Graphical Abstract: The selectivity of zirconium phosphate amorphous [Zr(HPO4)2?H2O; ZrPA], sodium exchanged zirconium phosphate amorphous [Zr(NaPO4)2; NaZrPA], potassium exchanged zirconium phosphate amorphous [Zr(KPO4) 2; KZrPA], zirconium phenylphosphonate amorphous [Zr(O 3PC6H5)2; ZrPPA], zirconium carboxyethylphosphonate [Zr(O3PCH2CH2COOH) 2; ZrCEP] and aluminium carboxyethylphosphonate [Al 3(OH)3(O3PCH2CH2CO 2)2?3H2O; AlCEP] was evaluated in the Baeyer-Villiger oxidation of cyclopentanone, p-methoxybenzaldehyde and 2,4,6-trimethylbenzaldehyde by hydrogen peroxide, in acetic acid. Different selectivities have been found which were correlated with the properties and structure of each compound.
Supported sulfonic acid as green and efficient catalyst for Baeyer-Villiger oxidation with 30% aqueous hydrogen peroxide
Piscopo, Calogero G.,Loebbecke, Stefan,Maggi, Raimondo,Sartori, Giovanni
experimental part, p. 1625 - 1629 (2010/10/01)
Silica-supported propylsulfonic acid is a very good heterogeneous catalyst for the Baeyer-Villiger oxidation of cyclic ketones to lactones with stoichiometric 30% aqueous hydrogen peroxide in 1,1,1,3,3,3-hexafluoro-2- propanol as solvent.
Synthesis and antimalarial activities of novel 3,3,6,6-tetraalkyl-1,2,4,5-tetraoxanes
Zmitek, Katja,Stavber, Stojan,Zupan, Marko,Bonnet-Delpon, Daniele,Charneau, Sebastien,Grellier, Phillipe,Iskra, Jernej
, p. 7790 - 7795 (2007/10/03)
The oxidative system H2O2/fluorinated alcohol (TFE, HFIP) was used for direct acid- and MeReO3-catalyzed synthesis of 1,2,4,5-tetraoxanes from cyclic (C6, C7, and C12) and acyclic ketones. The influence of ring size and alkyl chain length were studied and antimalarial activities of synthetic 3,3,6,6-tetraalkyl-1,2,4,5-tetraoxanes were determined. Variations in their antimalarial activities were significant, although they share similar electrochemical properties of the peroxide bond.
Dispiro-1,2,4-trioxolanes by Ozonolysis of Cycloalkylidenecycloalkanes on Polyethylene
Griesbaum, Karl,Krieger-Beck, Petra,Beck, Johannes
, p. 391 - 396 (2007/10/02)
Ozonolyses of symmetrical (1b-d) and of unsymmetrical cycloalkylidenecycloalkanes (8a, b) afforded the dispiro-1,2,4-trioxolanes 4b-d and 9a, b, respectively.Their thermal decompositions gave mixtures of the cyclic ketones (3) and lactones (6).Photolysis afforded in addition to 3 and 6 the cyclic anhydrides 13, which are isomeric with the corresponding disoiro-1,2,4-trioxolanes.
