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Oxide groups

AHylestrenol (37) is prepared from (32), an intermediate in the synthesis of norethindrone. Treatment of (32) with ethanedithiol and catalytic boron trifluoride provides a thioketal. Reduction with sodium in Hquid ammonia results in the desired reductive elimination of the thioketal along with reduction of the 17-keto group. Oxidation of this alcohol with chromic acid in acetone followed by addition of aHyl magnesium bromide, completes the synthesis... [Pg.212]

A second approach utilizes the oxidation of alow mobiUty substituted 4-hydroxydiphenylamine to which an image dye is linked through a sulfonamide group. Oxidation and hydrolysis result in ting closure and release of the alkaU-soluble dye (eq. 2). [Pg.491]

The net reaction accomplished by the TCA cycle, as follows, shows two molecules of COg, one ATP, and four reduced coenzymes produced per acetate group oxidized. The cycle is exergonic, with a net AG° for one pass around the cycle of approximately —40 kj/mol. Table 20.1 compares the AG° values for the individual reactions with the overall AG° for the net reaction. [Pg.659]

The chemistry of hafnium has not received the same attention as that of titanium or zirconium, but it is clear that its behaviour follows that of zirconium very closely indeed with only minor differences in such properties as solubility and volatility being apparent in most of their compounds. The most important oxidation state in the chemistry of these elements is the group oxidation state of +4. This is too high to be ionic, but zirconium and hafnium, being larger, have oxides which are more basic than that of titanium and give rise to a more extensive and less-hydrolysed aqueous chemistry. In this oxidation state, particularly in the case of the dioxide and tetrachloride, titanium shows many similarities with tin which is of much the same size. A large... [Pg.958]

The group oxidation state of +5 is too high to allow the formation of simple ionic salts even for Nb and Ta, and in lower oxidation states the higher sublimation energies of these heavier metals, coupled with their ease of oxidation, again militates against the formation of simple salts of the oxoacids. As a consequence the only simple oxoanion salts are the sulfates of vanadium in the oxidation states +3 and +2. These can be crystallized from aqueous solutions as hydrates and are both strongly... [Pg.993]

For the heavier congenors, tungsten in the group oxidation state is much more stable to reduction, and it is apparently the last element in the third transition series in which all the 5d electrons participate in metal bonding. [Pg.1005]

In moving across the transition series, iron is the first element which fails to attain its group oxidation state (-1-8). The highest oxidation state known (so far) is 4-6 in [Fe04] and even this is extremely easily reduced. On the... [Pg.1077]

Preparations and reactions of inorganic main-group oxide fluorides. J. H. Holloway and D. Lay-cock, Adv. Inorg. Chem. Radiochem., 1983,27,157-195 (342). [Pg.62]

X-ray photon emission spectra, 2,128 Methylene groups oxidation... [Pg.164]

Diels-Alder reaction of the furan derivative 148 with homochiral bicyclic enone 149 is the key step [56] in the total synthesis of the diterpenes jatropho-lone A and B, 151 and 152, respectively, isolated from Jatropha gossypiifolia L [57], Initial efforts to carry out the cycloaddition between 148 and 149 under thermal or Lewis-acid conditions failed due to diene instability. Application of 5kbar of pressure to a neat 1 1 mixture of diene and dienophile afforded crystalline 150 with the desired regiochemistry (Scheme 5.23). Subsequent aromatization, introduction of the methylene group, oxidation and methylation afforded (-l-)-jatropholones 151 and 152. [Pg.232]

A number of investigations of the copper-group oxides and dioxygen complexes have been reported. The electronic spectra of CuO, AgO, and AuO were recorded in rare-gas matrices (9), and it was found that the three oxides could be formed effectively by cocondensation of the metal atoms with a dilute, oxygen matrix, followed by near-ultraviolet excitation. The effective wavelengths for CuO or AgO formation were X > 300 nm and for AuO was X > 200 nm. In addition, the laser fluorescence spectrum of CuO in solid Ar has been recorded (97). [Pg.139]

The oxidation of OPs can bring detoxication as well as activation. Oxidative attack can lead to the removal of R groups (oxidative dealkylation), leaving behind P-OH, which ionizes to PO . Such a conversion looks superficially like a hydrolysis, and was sometimes confused with it before the great diversity of P450-catalyzed biotransformations became known. Oxidative deethylation yields polar ionizable metabolites and generally causes detoxication (Eto 1974 Batten and Hutson 1995). Oxidative demethy-lation (0-demethylation) has been demonstrated during the metabolism of malathion. [Pg.197]

Each functional group of an amino acid exhibits all of its characteristic chemical reactions. For carboxylic acid groups, these reactions include the formation of esters, amides, and acid anhydrides for amino groups, acylation, amidation, and esterification and for —OH and —SH groups, oxidation and esterification. The most important reaction of amino acids is the formation of a peptide bond (shaded blue). [Pg.18]

It is evident that the supported clusters have a strong affinity for hydride ligands provided by the support. The process by which the support delivers these ligands is referred to in the catalysis literature as reverse hydrogen spillover. The opposite process (spillover), well known for supported metals [36], is shown by the theoretical results to be a redox process in reverse spillover, the support hydroxyl groups oxidize the cluster. [Pg.223]

During an attempt at destroying benzyl cyanide residues with sodium hypochlorite, a detonation was caused that was probabiy due to the formation of nitrogen trichloride. However, it might be asked if it was not due to the nitrile group oxidation by the hypochlorite present. [Pg.338]


See other pages where Oxide groups is mentioned: [Pg.215]    [Pg.216]    [Pg.392]    [Pg.398]    [Pg.438]    [Pg.503]    [Pg.2094]    [Pg.3]    [Pg.3]    [Pg.224]    [Pg.913]    [Pg.978]    [Pg.979]    [Pg.1005]    [Pg.1043]    [Pg.1077]    [Pg.1116]    [Pg.293]    [Pg.441]    [Pg.459]    [Pg.109]    [Pg.71]    [Pg.136]    [Pg.1432]    [Pg.230]    [Pg.205]    [Pg.12]    [Pg.801]    [Pg.135]    [Pg.118]   
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See also in sourсe #XX -- [ Pg.674 ]

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See also in sourсe #XX -- [ Pg.193 , Pg.293 , Pg.347 , Pg.348 , Pg.349 , Pg.351 , Pg.352 , Pg.379 , Pg.472 , Pg.569 ]

See also in sourсe #XX -- [ Pg.220 , Pg.395 , Pg.396 , Pg.397 , Pg.400 , Pg.429 , Pg.473 , Pg.633 ]




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Aldehydes by oxidation at methyl groups

Aldehydes by oxidation of methyl group

Alkaline earth (group oxidation number

Alkaline earth and group IV oxides

Alkyl group oxidative addition

Alkyl groups oxidation

Alkyl- diphenylphosphine oxides group

Aluminum oxide surface hydroxyl groups

Amino acids methyl group oxidation

Amino group oxidative coupling reactions

Amphoteric oxides and hydroxides group

Angular methyl group oxidation

Arenes phenyl group oxidation

Aromatic alkyl groups, oxidation

Aromatic polyethers having phosphine oxide groups

Basicity Carbonate, oxide group

Biochemical oxidations groups

By oxidation of methyl groups

Carbonyl group oxidation and reduction

Carbonyl groups, by oxidation

Carboxylic methyl groups), oxidation

Cellulose oxidized groups

Complex groups, oxides

Differentiation of hydroperoxide groups by reactions with nitric oxide

Difluoromethyl group oxidation

Directing groups oxidants

Easily oxidized phenyl group

Electrolytic oxidations groups

Enzymatic oxidation of the phenolic hydroxyl group

Ethylene oxide groups

Ethylene oxide with carboxyl groups

F Induced Oxidative Cleavage of Phenyldimethylsilyl Groups

Functional Group Oxidation Reactions

Functional Group Sensitivity to Jones Oxidation

Functional Group Transformations Oxidation and reduction

Functional groups oxidation level

Functional groups oxidation state

Functional groups oxidative conversions

GROUP SIX TRIATOMIC OXIDES

Graphite, surface groups oxides

Group 10 metal-promoted oxidations catalytic oxidative carbonylation

Group 11 metal-promoted oxidations oxidative biaryl coupling

Group 14 amides oxidative addition/redox

Group 15 cont oxides

Group 16 elements binary oxides

Group 16 elements sulfur oxides

Group 2 elements oxide deposition

Group 2 elements oxides

Group 2 low-valent oxides and nitrides

Group 2 oxides reaction with, phosgene

Group 4 metal-promoted oxidations asymmetric oxidation of sulfides

Group 4 oxide halides

Group 4 oxide halides reaction with, phosgene

Group 5 elements oxidation states

Group 5 metal halide clusters oxidation states

Group 5 metal-promoted oxidations epoxidations using vanadyl acetylacetonate

Group 7 metal-promoted oxidations epoxidation by salen manganese complexes

Group 8 , endogenous nitric oxide

Group 8 metal-promoted oxidations alkene cleavage and asymmetric dihydroxylation

Group 9 metal-promoted oxidations aerobic epoxidation of alkenes

Group II oxides

Group V metal oxides

Group VIA oxides

Group VIII metals, oxidation with

Group amphoteric oxides

Group oxidation number

Group oxidation states

Group trends oxidation states

Groups N-oxide

Guaiacyl groups, oxidation

High Oxidation State Anion Group (

Hydroperoxide groups oxide)

Hydroxy group, oxidation

Hydroxyl groups on oxide surfaces

Hydroxyl groups, furans oxidation with

Hydroxymethyl group, oxidation

Insoluble Oxide Group (

Iron group oxides

Jones oxidation functional group sensitivity

Jones oxidation protecting group sensitivity

Leaving group effect phosphine oxides

Leaving group effect pyridine oxides

MAIN GROUP OXIDES AND SULFIDES

Macroporous Oxides of Group 4 Elements (Ti,Zr)

Main group element oxide ceramics

Main group element oxides

Main group element oxides reactions with transition metal complexes

Main group oxides

Main-group elements oxidation states/numbers

Main-group metal oxides and nitrides

Main-group oxide fluorides

Melting points group 2 metal oxides

Melting points group 2 oxides

Mesoporous Oxides of Group 4 Elements (Ti, Zr)

Metabolites Formed by Oxidative Coupling of Galloyl Esters Groups 2B and 2C, Ellagitannins

Methyl group oxidation pathways

Methyl group, oxidation

Methyl group, oxidation carbonyl

Methylene groups ketones, oxidation, allylic

Methylene groups oxidation

Methylene groups, activated periodate oxidation

Methylene groups, nitrosation oxidation

Motion oxidized functional group

N-Formyl groups, protective removal, oxidative

Nitric oxide synthase prosthetic groups

Nitrogen groups oxidative cleavage

Organic functional groups relative oxidation states

Oxidable groups

Oxidation Group VIII metals

Oxidation States and EMFs of Groups

Oxidation States of Alcohols and Related Functional Groups

Oxidation functional group

Oxidation group

Oxidation leaving group generation

Oxidation methyl group, chromic acid

Oxidation number of reactive main-group elements

Oxidation of Aldehydes to Amides, Esters and Related Functional Groups

Oxidation of Hydroxyl Groups

Oxidation of active methylene groups

Oxidation of alkanes, alkenes and alkyl groups

Oxidation of aromatic methyl groups

Oxidation of sulfur groups

Oxidation of the methyl group

Oxidation of the phenolic hydroxyl group

Oxidation of vinyl group

Oxidation potential, functional group

Oxidation reactions migrating group mechanism

Oxidation states group 4 metals

Oxidation unsaturated groups

Oxidation, by air group

Oxidation, by nitric acid of aldehyde to carboxyl group

Oxidation, by nitric acid of hydroxyl to carboxyl group

Oxidation, of alkyl groups

Oxidation, oxazole reactions activating group

Oxidations hydroxyl groups

Oxidations of Individual OH Groups

Oxidative addition leaving group reactivity order

Oxidative aging groups

Oxidative phenylsulfonyl groups

Oxide surface hydroxyl groups

Oxides Group IIIA elements

Oxides group 14 metals

Oxides iron group oxide

Oxides of Group 1 elements

Oxides of Group 2A metals

Oxides of Other Groups

Oxides of group

Oxides of the Group IVA Elements

Oxidized Groups in Cellulose

Oxidized starches carboxylic groups

Oxidizing agents group 16 oxides and oxoacids

Oxidizing agents group 2 peroxides

Oxidizing group

Oxidizing group

Oxime group, oxidative cyclization

Periodate oxidation active methylene groups

Periodate oxidation groups

Peroxynitrite thiol group oxidation

Plasma membrane thiol group oxidation

Platinum group oxides

Platinum-group metals oxide-film formation

Platinum-group metals oxides

Preparations and Reactions of Inorganic Main-Group Oxide Fluorides

Protecting Group Sensitivity to Jones Oxidation

Protecting groups oxidation-labile

Protective groups, removal oxidative

Rare earth oxide elements cerium group

Rare earth oxide elements yttrium group

Reaction oxide-supported group VIII metal

Reactions at the Carbonyl Group—Oxidation and Reduction

Reactions of phosgene with Group 1 oxides and sulfides

Reactions of phosgene with Group 16 oxides

Reduction of Main Group Oxides via Metal Carbonyls and Carbonylate Anions

Reductions of Heterocyclic N-Oxides and Aromatic Nitro Groups

Replacement, benzenesulfonate groups oxide oxygen atom by sulfur

SH groups oxidation

Selective Oxidation of Hydroxymethyl Groups

Selective Oxidation of the Primary Hydroxyl Group

Selective Oxidative Cleavages at Other Functional Groups

Selenium dioxide, oxidation methyl group

Spectra of Adsorbed Water and Surface Hydroxyl Groups on Nonacidic Oxides

Spin-lattice relaxation oxidized functional groups

Substrate studies functional group oxidation

Sulfur groups oxidative cleavage

Surface functional group oxide

The Oxidation of Primary Hydroxyl Groups

The Oxidation of Secondary Hydroxyl Groups

The Polyaddition of Alkylene Oxides to Hydroxyl Groups

Thermal degradation/oxidation groups

Thiol-groups from oxidation

Transition group oxides

Transition metal oxides iron group oxide

Unsaturated groups oxidations, bioactivation

Unsaturated groups oxidative attack

Vinyl group, oxidation

Vinyl group, oxidation carboxyl

Zinc group oxides, stabilities

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