57526-47-3Relevant academic research and scientific papers
Acidic three-liquid-phase microemulsion systems based on balanced catalytic surfactant for epoxidation and sulfide oxidation under mild conditions
Fressancourt-Collinet, Marion,Hong, Bing,Leclercq, Loic,Alsters, Paul L.,Aubry, Jean-Marie,Nardello-Rataj, Veronique
supporting information, p. 409 - 420 (2013/05/22)
Didecyldimethylammonium tungstate has been designed as a balanced catalytic surfactant to form acidic three-liquid-phase microemulsion systems at room temperature in the presence of water, a non-chlorinated solvent and dimethyldioctylammonium salts (hydrogen sulfate and dihydrogen phosphate). The triphasic system is efficient for the oxidation of olefins, sulfides and thiophenes under mild conditions. Moreover, the recovery and reusability of the catalyst, the straightforward separation of products and catalysts in two distinct phases as well as the possible use of environmentally friendly solvents such as tert-butyl acetate, make this system particularly attractive for catalytic oxidation reactions involving hydrogen peroxide as the primary oxidant under acidic or neutral conditions.
Activation of hydrogen peroxide through hydrogen-bonding interaction with acidic alcohols: Epoxidation of alkenes in phenol
Wahlen, Joos,De Vos, Dirk E.,Jacobs, Pierre A.
, p. 1777 - 1780 (2007/10/03)
(Matrix presented) Electrophilic activation of hydrogen peroxide can be achieved in acidic alcohol solvents without the need for a metal catalyst. This concept is illustrated by the epoxidation of alkenes with H2O 2 employing phenol as a solvent. It is proposed that intermolecular hydrogen bonding between H2O2 and phenol activates H 2O2 for oxygen-atom transfer. In this interaction, the role of phenol is purely catalytic.
Process for producing carbonyl or hydroxy compound
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Example 4, (2008/06/13)
There are disclosed are a method for producing at least one compound selected from a carbonyl compound and a hydroxy adduct compound by an oxidative cleavage or addition reaction of an olefinic double bond of an olefin compound,???which contains??????reacting an olefin compound with hydrogen peroxide, utilizing as a catalyst, at least one member selected from(a) tungsten,(b) molybdenum, or(c) a tungsten or molybdenum metal compound containing(ia) tungsten or (ib) molybdenum and(ii) an element of Group IIIb, IVb, Vb or VIb excluding oxygen, anda catalyst composition.
Efficient o-trimethylsilylation of alcohols and phenols with trimethylsilyl azide catalyzed by tetrabutylammonium bromide under neat conditions
Amantini,Fringuelli,Pizzo,Vaccaro
, p. 6734 - 6737 (2007/10/03)
A very efficient procedure for the trimethylsilylation of a wide variety of alcohols, including primary, allylic, benzylic, secondary, hindered secondary, tertiary, and phenols is reported. The reactions were carried out under neat conditions with trimethylsilyl azide (TMSN3) and, when necessary, in the presence of a catalytic amount (20 mol %) of tetrabutylammonium bromide (TBABr) at 30 or 70 °C. Under catalytic conditions, the yields of the corresponding trimethylsilyl ethers were greater than 91%. This procedure also allows the selective protection of primary and secondary alcohols in the presence of tertiary ones.
Steric Structure of Mono- and Bicyclic Terpene Derivatives as Determined by NMR Spectroscopy
Koval'skaya,Kozlov
, p. 306 - 315 (2007/10/03)
The 1H and 13C NMR spectral data for a series of newly prepared mono- and bicyclic terpene derivatives are presented. The feasibility of NMR spectroscopy for examining cis-trans isomerism in terpenes and E-Z isomerism in oximes is discussed. From the values of vicinal spin-spin coupling constants, the signal multiplicities, and the appearance of W-interaction in the 1H spectra the steric orientation of the substituents in the complex structures of p-menthane, pinane, carane, and norbornane derivatives are unambiguously assigned. The steric structure of derivatives with a tetracoordinated carbon atom, where the characteristic spin-spin coupling constants are absent, can be correctly determined from 13C NMR spectral data.
Monoterpenediol insect repellents
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, (2008/06/13)
An insect repellent comprising as an active ingredient a monoterpenediol compound having the formula, STR1 wherein R1, R2 and R3 have either one of the following definitions: (i) all of R1, R2 and R3 are hydrogen, (ii) R1 is hydrogen and R2 and R3, taken together, form a carbon-carbon single bond, or (iii) R2 is hydrogen, R1 and R3, taken together, form a carbon-carbon single bond, and the hydroxyl bonded to the carbon atom marked with an asterisk takes an α-configuration.
ONE-POT TWO-STEP SYNTHESIS OF 1,2-DIOL
Fringuelli, F.,Germani, R.,Pizzo, F.,Savelli, G.
, p. 1939 - 1944 (2007/10/02)
Diols can be prepared by hydroxilation of alkenes with m-chloroperoxybenzoic acid in water.The process occurs with high yield and complete anti stereospecificity.
Transformations of 3-carene oxide at rhenium-containing catalysts
Manukov, E. N.,Bazhina, G. N.
, p. 106 - 110 (2007/10/02)
The transformations of 3-carene oxide at rhenium-containing catalysts were studied.The introduction of rhenium into the catalytic system significantly increases the reaction rate and leads to the formation of compounds not previously encountered in the products from the isomerization of 3-carene oxide, i.e., 3-carene, 3(10),4-caradiene, 3,3,6-trimethylcycloheptanone, and 3-caren-10-ol.
STEREOCHEMISTRY OF THE CARANE SYSTEM. OXIDATION PRODUCTS OF ISOMERIC 3,4-CARANEDIOLS OBTAINED FROM (+)-3-CARENE
Hendrich, Aleksandra,Piatkowski, Krzysztof
, p. 73 - 84 (2007/10/02)
Oxidation of four isomeric 3,4-caranediols has been carried out and reaction products have been investigated.It has been found that cis-diols rather form cyclic ketals than are oxidized under conditions of the Jones reaction.The key intermediate for syntheses of chrysanthemic acid, (-)-2-acetonyl-3,3-dimethylcyclopropaneacetic acid was obtained exclusively by oxidation of (-)-3β,4α-caranediol.
