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Hydrogenation carbonyl compound

Figure 8.10 Reaction pathways of amino acid and hydroxyacid formation from carbonyl compounds, hydrogen cyanide, and ammonia... Figure 8.10 Reaction pathways of amino acid and hydroxyacid formation from carbonyl compounds, hydrogen cyanide, and ammonia...
The results of unsaturated carbonyl compounds hydrogenation in the presence of metal oxide - monolayer oxide - platinum (Pt loading 2 %) catalysts are collected in Table 3 (Pt from H2PtCl6) and Table 4 (Pt from Pt(acac)2). In all the cases, the selectivity of the platinum catalysts deposited on supports modified with transition metal oxide monolayers... [Pg.792]

With certain reactants isocyanides undergo three-component condensation and with others four-component condensation.32 1 Three-component addition occurs when isocyanides react with the combinations carboxylic acid-carbonyl compound, hydrogen, azide-carbonyl compound, tropylium salt-water, or two molecules of hydrogen thiocyanate. [Pg.893]

Basic Principles Practical Photochemistry General Considerations Carbonyl Compounds a-Cleavage Carbonyl Compounds Hydrogen Abstraction ... [Pg.637]

PE Unsaturations, aromatic carbonyl compounds, hydrogen at tertiary carbon, aromatic amines, groups formed during oxidation (hydroperoxides, carbonyl, carboxyl, hydroxyl), benzophenones, quinones, transition metal compounds, TiOs, polynuclear aromatics Free radiceds, crosslinks Free radicals, hydroperoxides, carbonyl groups, chain scissions... [Pg.187]

Natural rubber (hevea) is 98% c/ -l,4-polyisoprene with 2% 3,4-structure. It can be synthesized by anionic polymerization with alkyllithium compounds or with Ziegler-Natta catalysts [220-225]. The polymerization is carried out in solvents. Impurities such as acetylenes, carbonyl compounds, hydrogen sulfide, and water have to be removed [217,226-228]. [Pg.352]

A full kinetic model of the hydrogenation based on rate constants for individual steps in the catalysis was developed (Scheme 30) [69] this kinetic model simulates the rate of carbonyl compound hydrogenation and of the amounts of ruthenium species 1-tol and 2-tol present during hydrogenation [69]. [Pg.111]

The elimination of 3-hydrogen of Pd alkoxide (17) to afford a carbonyl compound is a similar reaction. [Pg.9]

Seienazolidines can also be obtained by first treating aziridine with hydrogen selenide and condensing the intermediate product with a carbonyl compound (Scheme 70) (Methode II). [Pg.265]

Two aldehydes two ketones or one aldehyde and one ketone may be formed Let s recall the classes of carbonyl compounds from Table 4 1 Aldehydes have at least one hydrogen on the carbonyl group ketones have two carbon substituents—alkyl groups for example—on the carbonyl Carboxylic acids have a hydroxyl substituent attached to the carbonyl group... [Pg.263]

The addition of hydrogen cyanide is catalyzed by cyanide ion but HCN is too weak an acid to provide enough C=N for the reaction to proceed at a reasonable rate Cyanohydrins are therefore normally prepared by adding an acid to a solution containing the carbonyl compound and sodium or potassium cyanide This procedure ensures that free cyanide ion is always present m amounts sufficient to increase the rate of the reaction... [Pg.718]

Substitution of deuterium for hydrogen at the a carbon atom of an aldehyde or a ketone is a convenient way to introduce an isotopic label into a molecule and is readily carried out by treating the carbonyl compound with deuterium oxide (D2O) and base... [Pg.768]

Secondary amines are prepared by hydrogenation of a carbonyl compound m the presence of a primary amine An N substituted mine or Schijfs base is an intermediate... [Pg.934]

A variation of the classical reductive amination procedure uses sodium cyanoboro hydride (NaBH3CN) instead of hydrogen as the reducing agent and is better suited to amine syntheses m which only a few grams of material are needed All that is required IS to add sodium cyanoborohydride to an alcohol solution of the carbonyl compound and an amine... [Pg.935]

Hydrogen bonding to a carbonyl group causes a shift to lower frequency of 40 to 60 cm k Acids, amides, enolized /3-keto carbonyl systems, and o-hydroxyphenol and o-aminophenyl carbonyl compounds show this effect. All carbonyl compounds tend to give slightly lower values for the carbonyl stretching frequency in the solid state compared with the value for dilute solutions. [Pg.742]

Vinyl ethers and a,P unsaturated carbonyl compounds cyclize in a hetero-Diels-Alder reaction when heated together in an autoclave with small amounts of hydroquinone added to inhibit polymerisation. Acrolein gives 3,4-dihydro-2-methoxy-2JT-pyran (234,235), which can easily be hydrolysed to glutaraldehyde (236) or hydrogenated to 1,5-pentanediol (237). With 2-meth5lene-l,3-dicarbonyl compounds the reaction is nearly quantitative (238). [Pg.115]

Study of the mechanism of this complex reduction-Hquefaction suggests that part of the mechanism involves formate production from carbonate, dehydration of the vicinal hydroxyl groups in the ceUulosic feed to carbonyl compounds via enols, reduction of the carbonyl group to an alcohol by formate and water, and regeneration of formate (46). In view of the complex nature of the reactants and products, it is likely that a complete understanding of all of the chemical reactions that occur will not be developed. However, the Hquefaction mechanism probably involves catalytic hydrogenation because carbon monoxide would be expected to form at least some hydrogen by the water-gas shift reaction. [Pg.26]


See other pages where Hydrogenation carbonyl compound is mentioned: [Pg.263]    [Pg.116]    [Pg.263]    [Pg.270]    [Pg.369]    [Pg.51]    [Pg.290]    [Pg.225]    [Pg.259]    [Pg.29]    [Pg.790]    [Pg.36]    [Pg.142]    [Pg.263]    [Pg.116]    [Pg.263]    [Pg.270]    [Pg.369]    [Pg.51]    [Pg.290]    [Pg.225]    [Pg.259]    [Pg.29]    [Pg.790]    [Pg.36]    [Pg.142]    [Pg.211]    [Pg.319]    [Pg.105]    [Pg.268]    [Pg.299]    [Pg.62]    [Pg.104]    [Pg.363]    [Pg.364]    [Pg.573]    [Pg.628]    [Pg.934]    [Pg.50]    [Pg.336]    [Pg.107]   
See also in sourсe #XX -- [ Pg.118 ]

See also in sourсe #XX -- [ Pg.439 ]




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Activated hydrogens in saturated carbonyl compounds

Activated hydrogens in unsaturated carbonyl compounds

Addition of hydrogen halide to unsaturated alcohols, ethers, carbonyl compounds, and nitriles

Carbonyl compounds asymmetric hydrogenation

Carbonyl compounds catalytic hydrogenation

Carbonyl compounds homogeneous catalytic hydrogenation

Carbonyl compounds hydrogen abstraction

Carbonyl compounds hydrogen-bonding effects

Carbonyl compounds hydrogenation, homogeneous catalysis

Carbonyl compounds hydrogenation, stereochemistry

Carbonyl compounds intermolecular hydrogen abstraction

Carbonyl compounds intramolecular hydrogen abstraction

Carbonyl compounds, transfer hydrogenation

Carbonyl hydrogen compounds

Carbonyl hydrogen compounds

Cobalt complexes carbonyl compound hydrogenation

Compounds hydrogen

Hydrogen carbonylation

Hydrogen of carbonyl compounds

Hydrogen sulfide carbonyl compounds

Hydrogen sulfide, addition with carbonyl compounds

Hydrogen transfer carbonyl compounds

Hydrogen-bonding activation carbonyl compounds, asymmetric

Hydrogenated compounds

Hydrogenation V Carbonyl Compounds

Hydrogenation aromatic carbonyl compounds

Hydrogenation carbonyl compound reduction

Hydrogenation compounds

Hydrogenation of carbonyl compounds

Hydrogenation of unsaturated carbonyl compound

Hydrogenation unsaturated carbonyl compounds

Hydrogenous compounds

Silane, hydridoionic hydrogenation unsaturated carbonyl compounds

Silane, triethylionic hydrogenation carbonyl compounds

Transfer hydrogenation of carbonyl compounds

Unsaturated carbonyl compounds hydrogen availability

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