529-02-2

Upstream product

• 89-82-7 pulegone 
• 64-17-5 ethanol 
• 5392-40-5 (E/Z)-3,7-dimethyl-2,6-octadienal 
• 89-82-7 pulegone 
• 106-23-0 3,7-dimethyl-oct-6-enal 
• 89-79-2 Isopulegol 
• 158137-71-4 (2-Isopropylidene-5-methyl-cyclohexyloxymethyl)-benzene 

Downstream Products

• 586-67-4 3,8-p-Menthadien 
• 586-63-0 isoterpinolene 
• 84161-98-8 8-methoxy-p-menth-3-ene 
• 24301-81-3 1-(1-Ethoxy-1-methyl-ethyl)-4-methyl-cyclohexene 
• 89-82-7 pulegone 
• 29606-79-9 isopulegone 
• 158137-71-4 (2-Isopropylidene-5-methyl-cyclohexyloxymethyl)-benzene 
• 24302-23-6 p-menth-3-en-8-ol 

Relevant academic research and scientific papers

Pd nanoparticles immobilized on graphite oxide modified with a base: Highly efficient catalysts for selective hydrogenation of citral

In this work, the Pd-based catalysts were designed via immobilizing Pd nanoparticles on graphite oxide (GO) modified with organic base, 1,1,3,3-tetramethylguanidine (TMG), which was used for the selective hydrogenation of citral. These catalysts were characterized by various techniques including IR, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was demonstrated that the Pd particles with size less than 5 nm were uniformly distributed throughout the support, and they were in the electron-deficient state due to the strong interactions with the modified support. The resultant Pd-TMG/GO catalyst displayed high efficiency for the selective hydrogenation of citral with a turnover frequency of 7100 h-1 as well as superior selectivity to citronellal of 89.6%. Moreover, the catalyst can be reused for five times without obvious activity loss, which may result from its stable structure.

Physically and chemically mixed TiO2-supported Pd and Au catalysts: unexpected synergistic effects on selective hydrogenation of citral in supercritical CO2

The selective hydrogenation of citral was studied with various TiO2-supported monometallic and bimetallic Pd and Au catalysts and their physical mixtures in supercritical CO2 (scCO2). Significant synergistic effects appeared when active Pd species was chemically or physically mixed with less active Au species. The total rate of conversion was greatly enhanced and the selectivity to citronellal (CAL) was improved. The physical properties of those catalysts were characterized by TEM, HRTEM-EDS, XPS, and UV/Vis and their features of H2 desorption were examined by TPD. The physical and chemical characterization results were used to discuss the reasons for the unexpected synergistic effects observed. The same selective hydrogenation was also conducted in a conventional non-polar organic solvent of n-hexane to examine the roles of scCO2. The use of scCO2 was effective for accelerating the hydrogenation of citral and improving the selectivity to CAL.

Colloidal noble-metal and bimetallic alloy nanocrystals: A general synthetic method and their catalytic hydrogenation properties

A general single-step strategy has been developed for the direct thermal decomposition of noble-metal salts in octadecylamine to synthesize octahedron- and rod-shaped noblemetal aggregates and monodisperse noble-metal or bimetallic alloy nanocrystals without introducing any additive into the system. It has presented a facile and economic way to fabricate these nanocrystals, especially alloy nanocrystals, which does not require a post-synthesis solid-state annealing process. The morphology of the nanocrystals can be easily controlled by tuning the synthetic temperature. Their ability to catalyze heterogeneous Suzuki coupling reactions has been investigated and showed satisfactory catalytic activity. The catalytic performanee of the monometallic and bimetallic alloy nanocrystals were also evaluated in the selective hydrogenation of citral in a conventional organic solvent (toluene) and a green solvent (supercritical carbon dioxide, scCO2). Interestingly, the catalysts performed differently to each other when they were in ScCO2 owing to the different morphology, which should be readily optimized for further use.

A METHOD OF PRODUCING CYCLIC DIOLS

The invention described a method of producing a 5-alkyl-2-α-hydroxyalkyl-cyclohexanol of the formula (I), the method including the step of exposing a 6,7-unsaturated aldehyde or ketone starting material of the formula (II) in a two phase reaction system, one phase being an aqueous phase, to an acid catalyst at a temperature of above 100 degree Celcius [deg C] and 250 deg C, the amount of acid being between about 0.05 and 4.0 % (m/m) to produce the 5-alkyl-2-α-hydroxyalkyl-cyclohexanol (I).

Lipase-catalyzed resolution of p-menthan-3-ols monoterpenes: Preparation of the enantiomer-enriched forms of menthol, isopulegol, trans- and cis-piperitol, and cis-isopiperitenol

A study on the enzymic resolution of the most common p-menthan-3-ol monoterpene isomers is described. Enantioenriched alcohols 1, 5, 10, 11 and 12 are obtained by means of the lipase-mediated kinetic acetylation of the corresponding racemic materials. The stereochemical aspects of the enzymic process have been investigated. We found that the structural features of the starting p-menthan-3-ol as well as the kind of lipase used, impacted strongly on the enantioselectivity of the resolution. The potentialities of this approach for preparative purposes are discussed.

A novel, efficient, and highly selective O-Bn bond cleavage reaction via a rare K-induced electron transfer process

A new, efficient and highly selective deprotective method of both benzyl and benzylidene groups for protection of monohydroxyl and dihydroxyl, respectively, has been developed by using the system K-t-BuNH2-t-BuOH-18-crown-6. This method is valu

Dimethyl-(4-methyl-1-cyclohexenyl)methyl and 2-(1-methylethylidene)-5- methylcyclohexyl ethers from pulegone

NaBH4 reduction of pulegone (1) in short chain alcohols followed by acidification of the reaction mixture gives dimethyl-(4-methyl-1- cyclohexenyl) ethers. Acid catalyzed transetherification of these ethers in longer chain alcohols yields mixtures of the title compounds.

ALKYL METAL ASYMMETRIC REDUCTION. 11. THE REACTION OF α,β-UNSATURATED KETONES WITH β-BRANCHED TRIALKYLALUMINIUM COMPOUNDS.

The reduction of a series of α,β-unsaturated ketones has been studied under various experimental conditions, by using β-branched trialkylalanes.Asymmetric induction phenomena are observed when optically active trialkylalanes are used.