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Alkenes oxidants

Although it is not a reaction of alkenes, oxidation of some alkanes with Pd(ll) is cited here. 1-Adamantyl Irilluoroacetate (155) was obtained in above 50% yield by the reaction of adamantane with Pd(OAc)2 in trifluoroa-cetic acid at 80 C[171]. [Pg.41]

Hydroboration-oxidation (Sections 6 11-6 13) This two step sequence achieves hydration of alkenes in a ste reospecific syn manner with a regiose lectivity opposite to Markovnikov s rule An organoborane is formed by electro philic addition of diborane to an alkene Oxidation of the organoborane inter mediate with hydrogen peroxide com pletes the process Rearrangements do not occur... [Pg.273]

Materials that typify thermoresponsive behavior are polyethylene—poly (ethylene glycol) copolymers that are used to functionalize the surfaces of polyethylene films (smart surfaces) (20). When the copolymer is immersed in water, the poly(ethylene glycol) functionaUties at the surfaces have solvation behavior similar to poly(ethylene glycol) itself. The abiUty to design a smart surface in these cases is based on the observed behavior of inverse temperature-dependent solubiUty of poly(alkene oxide)s in water. The behavior is used to produce surface-modified polymers that reversibly change their hydrophilicity and solvation with changes in temperatures. Similar behaviors have been observed as a function of changes in pH (21—24). [Pg.250]

Uses. Magnesium alkyls are used as polymerization catalysts for alpha-alkenes and dienes, such as the polymerization of ethylene (qv), and in combination with aluminum alkyls and the transition-metal haUdes (16—18). Magnesium alkyls have been used in conjunction with other compounds in the polymerization of alkene oxides, alkene sulfides, acrylonitrile (qv), and polar vinyl monomers (19—22). Magnesium alkyls can be used as a Hquid detergents (23). Also, magnesium alkyls have been used as fuel additives and for the suppression of soot in combustion of residual furnace oil (24). [Pg.340]

DJERASSI RYLANDER Oxidation Ru04 in oxidative cleavage ot phenols or alkenes oxidation ol aromatics to quinones oxidation ol alkyl amides to irmdes or ol ethers lo esters... [Pg.97]

In the same spirit DFT studies on peroxo-complexes in titanosilicalite-1 catalyst were performed [3]. This topic was selected since Ti-containing porous silicates exhibited excellent catalytic activities in the oxidation of various organic compounds in the presence of hydrogen peroxide under mild conditions. Catalytic reactions include epoxidation of alkenes, oxidation of alkanes, alcohols, amines, hydroxylation of aromatics, and ammoximation of ketones. The studies comprised detailed analysis of the activated adsorption of hydrogen peroxide with... [Pg.7]

Iron complexes with the pentadentate ligand 3 derived from pyridyl and prolinol building blocks containing a stereogenic center were reported from the group of Klein Gebbink (Scheme 4) [34]. In alkene oxidations with hydrogen peroxide,... [Pg.85]

Alkynes are reactive toward hydroboration reagents. The most useful procedures involve addition of a disubstituted borane to the alkyne, which avoids complications that occur with borane and lead to polymeric structures. Catechol borane is a particularly useful reagent for hydroboration of alkynes.212 Protonolysis of the adduct with acetic acid results in reduction of the alkyne to the corresponding cw-alkene. Oxidative workup with hydrogen peroxide gives ketones via enol intermediates. [Pg.352]

Ceria-based OSC compounds may have an impact on oxidation reactions especially when the catalysts are working around the stoichiometry (as this is the case under TW conditions). One of the first systematic studies was reported by Yu Yao [53,54], Most results were obtained in 02 excess (0.5% CO + O.5% 02 or 0.1% HC+ 1% 02). Several series of Pt, Pd and Rh/Al203 of various dispersion, as well as metal foils, were investigated in CO, alkane and alkene oxidation. The effect of metal dispersion in CO and the propane oxidation are shown in Figure 8.5. [Pg.243]

Recently, we have demonstrated another sort of homogeneous sonocatalysis in the sonochemical oxidation of alkenes by O2. Upon sonication of alkenes under O2 in the presence of Mo(C0) , 1-enols and epoxides are formed in one to one ratios. Radical trapping and kinetic studies suggest a mechanism involving initial allylic C-H bond cleavage (caused by the cavitational collapse), and subsequent well-known autoxidation and epoxidation steps. The following scheme is consistent with our observations. In the case of alkene isomerization, it is the catalyst which is being sonochemical activated. In the case of alkene oxidation, however, it is the substrate which is activated. [Pg.204]

Yasenkov, S. and Frei, H. (1998). Time-resolved FT-infrared spectroscopy of visible light-induced alkene oxidation by 02 in a zeolite. J. Phys. Chem. B 102, 8177-8182... [Pg.268]

Computational studies of alkene oxidation reactions by metal-oxo compounds, 38, 131 Computational studies on the mechanism of orotidine monophosphate decarboxylase,... [Pg.354]

Catalyst Alkene Oxidizing agent Stage 1 alkene to epoxide Stage 2 epoxide to cyclic carbonate ... [Pg.130]

Knops-Gerrits, P.-P., De Vos, D., Thibault-Starzyk, F. and Jacobs, P. A. Zeolite-encapsulated Mn(II) complexes as catalysts for alkene oxidation, Nature, 369 (1994), 543-546... [Pg.349]

On the other hand, in cyclic ethers (alkene oxides, oxetans, tetrahydrofuran) and formals the reaction site is a carbon-oxygen bond, the oxygen atom is the most basic point, and, hence, cationic polymerization is possible. The same considerations apply to the polymerization of lactones Cherdron, Ohse and Korte showed that with very pure monomers polyesters of high molecular weight could be obtained with various cationic catalysts and syncatalysts, and proposed a very reasonable mechanism involving acyl fission of the ring [89]. [Pg.135]

The reaction mechanisms of these transition metal mediated oxidations have been the subject of several computational studies, especially in the case of osmium tetraoxide [7-10], where the controversy about the mechanism of the oxidation reaction with olefins could not be solved experimentally [11-20]. Based on the early proposal of Sharpless [12], that metallaoxetanes should be involved in alkene oxidation reactions of metal-oxo compounds like Cr02Cl2, 0s04 and Mn04" the question arose whether the reaction proceeds via a concerted [3+2] route as originally proposed by Criegee [11] or via a stepwise [2+2] process with a metallaoxetane intermediate [12] (Figure 2). [Pg.254]

Alkene oxides, i.e., epoxides of C=C bonds, be they isolated or conjugated ... [Pg.609]

Diol epoxides, a very special and highly reactive subclass of alkene oxides encountered in the metabolism of polycyclic aromatic hydrocarbons. [Pg.609]

The overall reaction catalyzed by epoxide hydrolases is the addition of a H20 molecule to an epoxide. Alkene oxides, thus, yield diols (Fig. 10.5), whereas arene oxides yield dihydrodiols (cf. Fig. 10.8). In earlier studies, it had been postulated that epoxide hydrolases act by enhancing the nucleo-philicity of a H20 molecule and directing it to attack an epoxide, as pictured in Fig. 10.5, a [59] [60], Further evidence such as the lack of incorporation of 180 from H2180 into the substrate, the isolation of an ester intermediate, and the effects of group-selective reagents and carefully designed inhibitors led to a more-elaborate model [59][61 - 67]. As pictured in Fig. 10.5,b, nucleophilic attack of the substrate is mediated by a carboxylate group in the catalytic site to form an ester intermediate. In a second step, an activated H20... [Pg.614]

Together with glutathione conjugation, hydration is a major pathway in the inactivation and detoxification of arene oxides. Exceptions to this rule will be treated when discussing polycyclic aromatic hydrocarbons. Arene oxides are good substrates for microsomal EH, as evidenced in Table 10.1, where hydration of selected arene oxides, alkene oxides, and cy-cloalkene oxides by purified rat liver epoxide hydrolase is compared. The hy- ... [Pg.618]

As explained in the Introduction, alkene oxides (10.3) are generally chemically quite stable, indicating reduced reactivity compared to arene oxides. Under physiologically relevant conditions, they have little capacity to undergo rearrangement reactions, one exception being the acid-catalyzed 1,2-shift of a proton observed in some olefin epoxides (see Sect. 10.2.1 and Fig. 10.3). Alkene oxides are also resistant to uncatalyzed hydration, thus, in the absence of hydrolases enzymes, many alkene oxides that are formed as metabolites are stable enough to be isolated. [Pg.634]

The data in Table 10.1 suggest that the reactivity of epoxide hydrolase toward alkene oxides is highly variable and appears to depend, among other things, on the size of the substrate (compare epoxybutane to epoxyoctane), steric features (compare epoxyoctane to cycloalkene oxides), and electronic factors (see the chlorinated epoxides). In fact, comprehensive structure-metabolism relationships have not been reported for substrates of EH, in contrast to some narrow relationships that are valid for closely related series of substrates. A group of arene oxides, along with two alkene oxides to be discussed below (epoxyoctane and styrene oxide), are compared as substrates of human liver EH in Table 10.2 [119]. Clearly, the two alkene oxides are among the better substrates for the human enzyme, as they are for the rat enzyme (Table 10.1). [Pg.634]

See other pages where Alkenes oxidants is mentioned: [Pg.21]    [Pg.133]    [Pg.96]    [Pg.894]    [Pg.98]    [Pg.133]    [Pg.543]    [Pg.130]    [Pg.127]    [Pg.41]    [Pg.158]    [Pg.902]    [Pg.922]    [Pg.353]    [Pg.85]    [Pg.169]    [Pg.608]    [Pg.619]    [Pg.634]   
See also in sourсe #XX -- [ Pg.242 ]



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1,3-Dipolar cycloadditions nitrile oxides + alkenes

1-Alkenes, liquid-phase oxidation

1.2- Diols alkene oxidation

2-Alkenals, oxidative stress

4-Pyridinecarboxylic acid, 2,6-diphenylsynthesis via oxidative cleavage of alkenes

Acetals, dithiosynthesis via oxidative cleavage of alkenes

Acetonitrile, oxide reaction with alkenes

Aerobic oxidation of alkenes

Alcohols from Alkenes through Hydroboration-Oxidation Anti-Markovnikov Syn Hydration

Alcohols from alkenes by selenium dioxide oxidation

Alcohols from alkenes by singlet oxygen oxidation

Alcohols synthesis, via oxidative cleavage of alkenes

Alcohols via oxidative cleavage of alkenes

Alcohols, oxidizing reagents alkenes

Aldehydes alkene oxidation

Aldehydes via oxidative cleavage of alkenes

Alkane and alkene oxidations

Alkene Oxidation over Copper, Silver, and Gold Catalysts

Alkene Oxidation, to enone

Alkene Oxides (the Chlorohydrin Process)

Alkene Wacker reaction oxidation

Alkene cleavage large scale oxidations

Alkene cleavage oxidation

Alkene derivatives carbonylative oxidation

Alkene oxidation enantioselectivity

Alkene oxidation epoxidations

Alkene oxidation mechanisms

Alkene oxidation reactions by metal-oxo

Alkene oxidation reactions by metal-oxo compounds

Alkene oxidative arylations

Alkene oxides

Alkene oxides hydration

Alkene oxides s. Oxido

Alkene oxides s. Oxido compds

Alkene oxides s. Oxido compounds

Alkene oxides, elimination

Alkene oxides, elimination reactions

Alkenes 3+2] cycloaddition with nitrile oxide

Alkenes Kharasch-Sosnovsky oxidations

Alkenes Sharpless oxidation

Alkenes Wacker oxidation

Alkenes Wacker-type oxidation

Alkenes allylic oxidation

Alkenes anodic oxidation

Alkenes bicyclic oxides

Alkenes by oxidation

Alkenes carbonyl oxide epoxidation

Alkenes catalytic nitrile oxide reactions

Alkenes catalytic oxidation

Alkenes continued) oxidation

Alkenes copper compound oxidations

Alkenes cyclic oxidation

Alkenes cyclisation, oxidative

Alkenes from amine oxides

Alkenes hydroboration oxidation

Alkenes intramolecular reactions, nitrile oxides

Alkenes metal catalyzed oxidations with

Alkenes mild oxidation

Alkenes nitrile oxide cycloadditions

Alkenes nitrile oxides

Alkenes nitrous oxide

Alkenes oxidation

Alkenes oxidation catalysts

Alkenes oxidation level

Alkenes oxidation molybdenum catalyzed

Alkenes oxidation oxygen without catalyst

Alkenes oxidation reaction mechanism

Alkenes oxidation reaction rate

Alkenes oxidation reactions

Alkenes oxidation solid catalysts

Alkenes oxidation stereoselectivity

Alkenes oxidation to methyl ketones

Alkenes oxidation with alkaline hydrogen peroxide

Alkenes oxidation with hydrogen peroxide

Alkenes oxidation with iodosylbenzene

Alkenes oxidation with molecular oxygen

Alkenes oxidation with organic hydroperoxides

Alkenes oxidation with organic peracids

Alkenes oxidation with thallium acetate

Alkenes oxidation, catalytic selectivity

Alkenes oxidations, palladium®) acetate

Alkenes oxidative 1,2-difunctionalization, palladium

Alkenes oxidative acetoxylations

Alkenes oxidative amination

Alkenes oxidative arylation

Alkenes oxidative carbonylation

Alkenes oxidative carbonylations

Alkenes oxidative chlorination

Alkenes oxidative cleavage

Alkenes oxidative cleavage, osmium tetroxide

Alkenes oxidative coupling

Alkenes oxidative cross-coupling

Alkenes oxidative cyclization

Alkenes oxidative functionalization

Alkenes oxidative functionalization chemistry

Alkenes oxidative rearrangement

Alkenes oxidative trifluoromethylation

Alkenes palladium-catalyzed oxidation

Alkenes permanganate oxidation

Alkenes photo-oxidation

Alkenes reaction with nitrile oxides

Alkenes reactions, nitric oxide

Alkenes selective oxidation

Alkenes steroidal, oxidation

Alkenes total oxidation

Alkenes transition metal peroxide oxidation

Alkenes vinylic oxidation

Alkenes, cyclic, addition oxidative cleavage

Alkenes, intermolecular oxidation

Alkenes, oxidative

Alkenes, oxidative

Alkenes, oxidative amination/amidation

Alkenes, oxidative carboxylic acids

Alkenes, oxidative cleavage reagent

Alkenes, oxidative decarboxylation

Alkenes, perfluororeaction with nitric oxide

Alkenes, photocatalytic oxidations

Alkenes, y-hydroxyoxidative cleavage selective oxidation

Allylic oxidation of alkenes

Allylic oxidation, of alkenes, with

Allylic oxidations alkenes, manganese acetate

Amine oxides, alkenes from chiral forms

Amine oxides, alkenes from preparation

Aryl alkenes, oxidation

Asymmetric Oxidative Arene-Alkene Coupling (Fujiwara-Moritani) Reactions

Bismuth molybdate, alkene oxidation

Butadienes oxidative coupling, alkenes

CARBOXYLIC ACIDS FROM OXIDATION OF TERMINAL ALKENES

Carbohydrate alkenes, nitrile oxide

Carbohydrate alkenes, nitrile oxide cycloadditions

Carbonyl compounds synthesis by alkene oxidation

Carbonyl compounds via oxidative cleavage of alkenes

Carbonyl oxides alkenes

Carboxylation alkene carbonylative oxidation

Carboxylic acids alkene oxidation

Carboxylic acids via oxidative cleavage of alkenes

Catalytic oxidation of alkenes

Chromium oxidants alkenes

Chromium reagents oxidative cleavage of alkenes

Chromium trioxide oxidative cleavage of alkenes

Computational studies of alkene oxidation

Computational studies of alkene oxidation reactions by metal-oxo compounds

Cycloaddition of nitrile oxides with alkenes

Cycloaddition reactions of nitrile oxides with alkenes

Dicarboxylic acids, oxidation alkenes

Electrochemical oxidation alkenes

Environmentally friendly alkene oxidation

Environmentally friendly alkene oxidation methods

Epoxides aerobic alkene oxidation

Esters via oxidative cleavage of alkenes

Ethanethiol oxidative cleavage of alkenes

Ethylene oxide, tetracyanoreactions with alkenes

Ethylene oxide, tetracyanoreactions with alkenes via carbonyl ylides

Glycols by alkene oxidation

Gold, alkene oxidation

Group 8 metal-promoted oxidations alkene cleavage and asymmetric dihydroxylation

Group 9 metal-promoted oxidations aerobic epoxidation of alkenes

Hydration of alkene oxides to glycols

Hydroboration/oxidation of alkenes

Hydroboration—oxidation alcohols from alkenes through

Isoxazoles, from alkenes and nitrile oxides cycloaddition

Ketones (Cont alkenes by hydroboration-oxidation

Ketones alkene oxidations, palladium chloride

Ketones via Wacker oxidation of alkenes

Ketones via oxidative cleavage of alkenes

Lactones via oxidative cleavage of alkenes

Lead phenyliododiacetate oxidative cleavage of alkenes

Lead tetraacetate oxidative cleavage of alkenes

Lemieux-von Rudloff oxidation oxidative cleavage of alkenes

Liquid-Phase Oxidation of Alkenes

Manganese Complexes for Alkene Oxidation Based on Pyridyl Ligands

Manganese alkene oxidation

Mercury oxide alkenes

Methyl ketones alkene oxidation

Model alkenes oxidation

Nitric oxide alkenes

Nitric oxide reactions with alkenes

Nitrile oxides alkene chiral centeres

Nitrile oxides, cycloadditions with alkenes

Nitriles via oxidative cleavage of alkenes

Of nitrile oxides with alkenes

Of nitrile oxides with alkenes compounds

Organocatalytic Oxidation. Ketone-Catalyzed Asymmetric Epoxidation of Alkenes and Synthetic Applications

Osmium oxidation of alkenes to 1,2-diols

Osmium tetroxide alkene oxidation

Osmium tetroxide oxidative cleavage of alkenes

Other Alkene Oxidations

Oxidants alkene precursors

Oxidation Reaction Mechanism of Alkenes by OH

Oxidation States in Alkenes

Oxidation alkene dihydroxylation

Oxidation alkene epoxidation

Oxidation alkenes Ozonolysis

Oxidation asymmetric alkene dihydroxylation

Oxidation of Alkanes and Alkenes

Oxidation of Alkenes Cleavage to Carbonyl Compounds

Oxidation of Alkenes Epoxidation

Oxidation of Alkenes Epoxidation and Hydroxylation

Oxidation of Alkenes and Alkynes

Oxidation of Alkenes by Peroxy-acids

Oxidation of Alkenes to Give Corresponding Enol or Enone

Oxidation of Alkenes, Arenes and Alkynes

Oxidation of Alkenes, using Peroxides

Oxidation of Alkynes, Alkenes, and Benzylic Hydrocarbons

Oxidation of alkanes, alkenes and alkyl groups

Oxidation of alkenes

Oxidation of alkenes and sulphides

Oxidation of alkenes to epoxides

Oxidation of alkenes to form epoxides

Oxidation of alkenes with singlet oxygen

Oxidation of cyclic alkenes

Oxidation of other alkenes

Oxidation reactions alkene coupling

Oxidation reactions of alkenes

Oxidation reactions, alkene oxidative

Oxidation reactions, alkene oxidative dehydrogenation

Oxidations and Polymerizations of Alkenes

Oxidations of Alkenes Syn 1,2-Dihydroxylation

Oxidations of alkenes and cycloalkenes

Oxidative Carbonylation of Alkenes

Oxidative Cleavage of an Alkene

Oxidative Reactions of Alkenes

Oxidative addition alkenes

Oxidative alkene aziridination

Oxidative alkenes, carboxylic acids, palladium chloride

Oxidative amination of alkenes

Oxidative cleavage of alkenes

Oxidative cleavage, degradation of alkenes

Oxidative functionalizations alkenes, palladium acetate

Oxide catalysts alkene oxidation

Oxides alkene oxidation

Oxiranes in alkene oxidation

Oxygen, singlet alkene oxidation

Ozone oxidative cleavage of alkenes

Palladium Catalysis for Oxidative 1,2-Difunctionalization of Alkenes

Palladium alkene oxidation

Palladium complexes alkene oxidative reactions

Palladium-Catalyzed Oxidation of Alkenes

Periodates oxidative cleavage of alkenes

Permanganate ion, oxidation alkenes

Permanganate oxidation of alkenes and

Peterson alkenation oxidation

Phase Oxidation of Alkenes

Phase transfer catalysis alkene oxidation

Phosphine oxide, from alkene

Photo-oxidation of alkenes

Photochemical oxidation, alkenes

Pillared clays, oxidation alkenes

Potassium permanganate oxidative cleavage of alkenes

Reaction of alkene oxides (oxiranes) with sulfur compounds

Ruthenium dioxide oxidative cleavage of alkenes

Ruthenium tetroxide oxidative cleavage of alkenes

Selenenic acid, arylallylic oxidation alkenes

Selenium dioxide oxidation alkenes

Sharpless oxidation alkene dihydroxylation

Sodium periodate oxidative cleavage of alkenes

Stereoselectivity in some hydroboration-oxidations of alkenes with di-3-pinanylborane

Studies of Alkene Oxidation Reactions by Metal-Oxo Compounds

Sulfides via oxidative cleavage of alkenes

Supported alkene oxidation

Synthesis via oxidative cleavage of alkenes

Tandem alcohol oxidation, alkene

Tandem alcohol oxidation, alkene hydrogenation

Tandem oxidative cyclization, alkenes

Terminal alkenes electrophilic oxidation

Terminal alkenes oxidations, palladium®) acetate

Terminal alkenes, oxidative arylation

The Addition of Borane to an Alkene Hydroboration-Oxidation

The hydroboration-oxidation of alkenes

Urban alkene oxidation

Water alkene oxidations, palladium®) chloride

Zeolites alkene photo-oxidation

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