mechanistic investigation was performed to elucidate the reaction mechanism. For the cyclization of geranyl acetate, it was found that the cleavage of the leaving group is the rate-determiningstep. Furthermore, the studies revealed that trace amounts of acid are required as cocatalyst. A series of control experiments demonstrate that a synergistic interplay between the supramolecular capsule and the
Hybrid catalysts based on platinum and palladium nanoparticles for the hydrogenation of terpenes under slurry conditions
作者:E. A. Karakhanov、M. P. Boronoev、E. S. Subbotina、A. V. Zolotukhina、A. L. Maximov、T. Yu. Filippova
DOI:10.1134/s0965544116120045
日期:2016.12
Catalysts based on platinum and palladium nanoparticles immobilized in mesoporous phenolformaldehyde polymers modified with sulfo groups have been used for the hydrogenation of a number of terpenes, such as (S)-(–)-limonene, α-terpinene, γ-terpinene, and terpinolene. It has been found that Pd-containing catalysts exhibit higher activity in the exhaustive hydrogenation of terpenes, whereas Pt-containing
efficient transitionmetal triflate catalyzed approach to convert biomass-based compounds, such as monoterpene alcohols, sugar alcohols, octyl acetate and tea tree oil, to their corresponding olefins in high yields. The reaction proceeds through C–O bond cleavage under solvent-free conditions, where the catalytic activity is determined by the oxophilicity and the Lewis acidity of the metal catalyst
Isomerization equilibrium of the p-menthadienes in the vapor phase
作者:Z. A. Filippenko、O. M. Baranov、G. N. Roganov、G. Ya. Kabo
DOI:10.1007/bf00574247
日期:——
The isomerization equilibrium between nine p-menthadienes has been studied in the vaporphase at 250°C and their equilibrium ratios have been determined. A method for the quantitative GLC analysis of mixtures of isomeric p-menthadienes has been developed.
thionin-supported zeoliteNa-Y. The same reactions occur in Na-Y dried under the same conditions as thionin/Na-Y. It is postulated that the thermal treatment of Na-Y generates ‘electron holes’ (probably acidic sites). The transformation of monoterpenes occurs more likely via an electron transfer-induced reaction subordinated to the occurrence of the acidic sites. The radicalcation of the more thermodynamically