53404-49-2Relevant articles and documents
Biomass toward fine chemical products: Oxidation of α-pinene over sieves nanostructured modified with vanadium
Cánepa, Analía L.,Chanquía, Corina M.,Vaschetti, Virginia M.,Eimer, Griselda A.,Casuscelli, Sandra G.
, p. 65 - 73 (2015/05/05)
Vanadium-containing molecular sieves (V-M(x)) were synthetized and applied as heterogeneous catalysts for the liquid phase oxidation of α-pinene with hydrogen peroxide at 70°C. It has been found that the vanadium content in V-M(x) materials affected the conversion of α-pinene and product distribution. The turnover numbers increased strongly with the decreasing of V content probably caused by a high V dispersion. The major products were verbenone, trans-sobrerol and campholenic aldehyde. The acid-base properties of V-M(x) affected the distribution of products formed via the isomerization of α-pinene oxide over Lewis acid sites to campholenic aldehyde while Br?nsted acid sites brought about the formation of 1,2 pinanediol and trans-sobrerol by hydrolysis and by the opening of oxirane ring. The increase in V content in V-M(x) led to the increase in campholenic aldehyde, 1,2 pinanediol, trans- sobrerol and over oxidation products. Moreover, the effect of several solvents on the reaction oxidation was studied. The results showed that the highest α-pinene conversions are obtained in the following order: acetonitrile > ethanol > isoamyl alcohol > methyl ethyl ketone. Thus, using aprotic solvents, the catalytic activity was increased and the formation of alkyl glycol ethers as by-product was not observed.
Accelerating ligands for osmium tetraoxide catalyzed racemic dihydroxylation of α-pinene
Erdik,Kahya,Daskapan
, p. 1 - 7 (2007/10/03)
Osmium tetraoxide catalyzed racemic cis-dihydroxylation of α-pinene usinf N-oxide as cooxidant and hexamethylenetetraamine as accelerating ligand in tert-butyl alcohol gives excellent yield of α-pinanediol.