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Conjugate hydrogenation

Conjugate hydrogenation. The combination of zinc and NiCl2 (9 1) effects conjugate reduction of a,(3-enones in an aqueous alcohol in which both the enone and product are completely soluble. Ultrasound increases the rate and the yields. Presumably the salt is reduced to a low-valent form that is absorbed on the zinc. No reduction takes place with a 1 1 Zn-NiCl2 couple. The method is not applicable to a,(3-unsaturated enals. Isolated double bonds are also reduced by this method, but this hydrogenation can be inhibited by addition of ammonia or triethylamine. [Pg.352]

This one is more stable due to conjugation, hydrogen bonding, and loss of the ketone rather than the ester carbonyl group. [Pg.1254]

Zorky, P. Zorkaya, O. N. In Ref. 1, Specific Intermolecular Interactions in Organic Crystals Conjugated Hydrogen Bonds and Contacts of Benzene Rings, pp. 147-188. [Pg.369]

Cascades Initiated by Conjugate Hydrogen-transfer Reaction... [Pg.283]

Scheme 7.44 Cascade conjugate hydrogen transfer/intramolecular Michael reaction and application to the total synthesis of (+ )-ricciocarpin A. Scheme 7.44 Cascade conjugate hydrogen transfer/intramolecular Michael reaction and application to the total synthesis of (+ )-ricciocarpin A.
Scheme 7.45 Tandem conjugate hydrogen-transfer/electrophilic fluorination using cycle-specific imidazolidinone catalysts. Scheme 7.45 Tandem conjugate hydrogen-transfer/electrophilic fluorination using cycle-specific imidazolidinone catalysts.
Scheme 7.46 Cycle-specific catalysis in several tandem processes initiated by conjugate hydrogen-transfer reaction. Scheme 7.46 Cycle-specific catalysis in several tandem processes initiated by conjugate hydrogen-transfer reaction.
Another example of conjugated hydrogen bonded systems is found in 6 hydroxyfulvenes with a carbonyl in the 1-position. [Pg.298]

The asymmetric organocatalytic enantioselective conjugate hydrogen transfer reaction is clearly inspired by the mode of action in biological processes, in which reductions are accomplished by enzymes using hydride reduction cofactors like NADH. [Pg.996]

The stability of enols, and hence the position of the carbonyl/enol equilibrium, depends on their structure—conjugation, hydrogen bonding, aromaticity, and solvation are all important. [Pg.790]

A large number of different structures in the final product indicates that also other reactions (isomerization, conjugation, hydrogenation and dehydrogenation, formation of polycyclic and aromatic compounds) take place. Trimers and a small amount of tetramers are formed also. [Pg.76]


See other pages where Conjugate hydrogenation is mentioned: [Pg.121]    [Pg.348]    [Pg.131]    [Pg.387]    [Pg.387]    [Pg.501]    [Pg.261]    [Pg.348]    [Pg.4]    [Pg.100]    [Pg.244]    [Pg.261]    [Pg.382]    [Pg.7190]    [Pg.90]    [Pg.91]    [Pg.164]    [Pg.165]    [Pg.283]    [Pg.284]    [Pg.286]    [Pg.287]    [Pg.386]    [Pg.297]   
See also in sourсe #XX -- [ Pg.351 ]




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Active-Hydrogen-Mediated Hapten-Carrier Conjugation

Addition of Hydrogen Halides to Conjugated Dienes

Beneficial Micro Reactor Properties for Conjugated Alkene Hydrogenation

Carbocations addition of hydrogen halides to conjugated

Cascades Initiated by Conjugate Hydrogen-transfer Reaction

Catalytic hydrogenation conjugate reduction

Catalyzed Hydrogenation of Alkynes and Conjugated Dienes

Cobalt, hydrogenation conjugated dienes

Conjugate Hydrogen Transfer Reaction

Conjugate addition hydrogen chloride

Conjugate addition of hydrogen cyanide

Conjugate addition reactions hydrogen bonding

Conjugate reduction hydrogen donors

Conjugated Alkene Hydrogenation Investigated in Micro Reactors

Conjugated Dehydrogenation and Oxidation with Hydrogen Peroxide

Conjugated Dehydrogenation with Hydrogen Peroxide

Conjugated Oxidation with Hydrogen Peroxide

Conjugated Reactions of Oxidation with Hydrogen Peroxide in the Gas Phase

Conjugated diene complexes hydrogenation

Conjugated diene complexes of hydrogen nucleophiles

Conjugated diene complexes of hydrogen sulphide

Conjugated diene heats of hydrogenation

Conjugated diene hydrogenation

Conjugated dienes cyclic, selective hydrogenation

Conjugated dienes hydrogenation

Conjugated hydrogenation

Conjugated hydrogenation

Conjugated linoleic acids formation during hydrogenation

Conjugated transfer hydrogenation

Double bonds, conjugated hydrogenation

Drivers for Performing Conjugated Alkene Hydrogenation in Micro Reactors

Enantioselective Conjugate Addition Reactions via Hydrogen-bonding Activation

Esters, conjugated, reaction with hydrogen

Hapten-carrier conjugation hydrogens

Hydrogen availability selective, conjugated dienes

Hydrogen bonding, conjugate addition

Hydrogen bonding, conjugate addition determination

Hydrogen bromide conjugated dienes

Hydrogen bromide to conjugated dienes

Hydrogen chloride conjugated dienes

Hydrogen chloride to conjugated dienes

Hydrogen cyanide conjugate addition

Hydrogen cyanide conjugate vs. direct addition

Hydrogen halides conjugated dienes

Hydrogen halides to conjugated dienes

Hydrogen-bonded conjugates

Hydrogen-bonding additives in conjugated dienes

Hydrogen-bonding additives in conjugated trienes

Hydrogenated vegetable oils, conjugated linoleic acids

Hydrogenation conjugated acids

Hydrogenation conjugated alkenes

Hydrogenation conjugated esters

Hydrogenation conjugated polyenes

Hydrogenation of conjugated dienes

Hydrogenation, catalytic conjugated systems

Hydrogenation, catalytic, alkene conjugated compounds

Mechanism conjugated diene hydrogenation

Nitriles, catalytic hydrogenation conjugate reduction

Rhodium-Catalyzed Hydrogenation of Alkynes and Conjugated Dienes

Stereochemistry conjugate reduction, catalytic hydrogenation

Stereochemistry conjugated diene hydrogenation

Substrates conjugate reduction, catalytic hydrogenation

The hydrogenation of conjugated alkadienes

Transfer hydrogenation conjugated alkene bonds

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