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Groups phenyl

Ph The phenyl group, CfiHs-. pH See hydrogen-ion concentration, phaeophorbide See chlorophyll, phaeophytin See chlorophyll, phalloidins See amanitins. [Pg.302]

Anisole is a colourless and almost odourless liquid, having b.p. 154°, and dy 0-99. Like the aliphatic ethers, it is chemically inert, although of course the phenyl group shows the normal aromatic reactions. [Pg.220]

This reaction illustrates one of the methods by which R. Kuhn synthesised long polyene chains terminated at each end by phenyl groups. [Pg.238]

D) No general reaction can be cited for the preparation of crystalline derivatives of Class (iii). Triphenylamine, when nitrated in acetic acid with fuming nitric acid, gives tri-/>-nitrophenylamine, m.p. 280°. The presence of substituents in the phenyl groups may however complicate or invalidate nitration. [Pg.379]

A probable mechanism for this rearrangement postulates the intermediate formation of a hydroxide-ion addition complex, followed by the migration of a phenyl group as an anion ... [Pg.709]

The product is the isomer with the two phenyl groups cis to each other, since decarboxylation with quinoline-copper chromium oxide at 210-220° yields cis-stilbene. [Pg.713]

Here is a more difficult example based also on a-hydroxy acids. Use the two phenyl groups as a clue for your first disconnetion in designing a synthesis for TM 135 ... [Pg.43]

Analysis Using the clue, we remove both phenyl groups to give an ester ... [Pg.43]

The nitration of nitro- and dinitro-biphenyls has been examined by several workers. i - As would be expected, nitration of the nitro-biphenyls occurs in the phenyl ring. Like a phenyl group, a nitrophenyl group is 0 -directing, but like certain substituents of the type CH CHA ( 9.1.6) it is, except in the case of w-nitrophenyl, deactivating. Partial rate factors for the nitration at o °C of biphenyl and the nitro-biphenyls with solutions prepared from nitric acid and acetic anhydride are given below. The high o p-v2X o found for nitration of biphenyl... [Pg.202]

Indene derivatives 264a and 264b are formed by the intramolecular reaction of 3-methyl-3-phenyl-l-butene (263a) and 3,3,3-triphenylpropylene (263b) [237]. Two phenyl groups are introduced into the /3-substituted -methylstyrene 265 to form the /3-substituted /3-diphenylmethylstyrene 267 via 266 in one step[238]. Allyl acetate reacts with benzene to give 3-phenylcinnamaldehyde (269) by acyl—O bond fission. The primary product 268 was obtained in a trace amount[239]. [Pg.56]

The reaction of the o-iodophenol 275 with an alkylallene affords the bcnzo-furan derivative 276[184], Similarly, the reactions of the 6-hydroxyallenes 277 and 279 with iodobenzene afford the tetrahydrofurans 278 and 280. Under a CO atmosphere, CO insertion takes place before the insertion of the allenyl bond, and a benzoyl group, rather than a phenyl group, attacks the allene carbon to give 280. Reaction of iodobenzene with 4,5-hexadienoic acid (281) affords the furanone derivative 282[185]. [Pg.167]

Organoboranes are reactive compounds for cross-coupling[277]. The synthesis of humulene (83) by the intramolecular cross-coupling of allylic bromide with alkenylborane is an example[278]. The reaction of vinyiborane with vinyl-oxirane (425) affords the homoallylic alcohol 426 by 1,2-addition as main products and the allylic alcohol 427 by 1,4-addition as a minor product[279]. Two phenyl groups in sodium tetraphenylborate (428) are used for the coupling with allylic acetate[280] or allyl chloride[33,28l]. [Pg.347]

Recently. Fourier transform technique allowed the determination in natural abundance of C chemical shifts for some 4-thiazoline-2-thiones. Substituent chemical shifts for methyl and phenyl groups have been collected and discussed (874). For the overcrowded polyalkyl-A-4-thiazoline-2-thiones. the evolution of these chemical shifts furnishes... [Pg.384]

The effect of an o>-phenyl group as a function of the alkyl chain length has been studied in 3-(through-space interaction has been evidenced on the reactivity of the thiocarbonyl group. [Pg.392]

In styryl compounds, a part of the methine chain is replaced by a phenyl group. Their name is based on the nuclei from which they are issued 3-ethyl-5-methyl-2-(p-dimethylaminostyryl)thiazolium iodide (Scheme 7). [Pg.29]

The dyes prepared in this way show a positive solvatochromism as the dielectric constant of the solvent increases, indicating that they possess a predominantly nonpolar structure. Substituents on the phenyl group in the 4-position of the selenazole ring have little influence on the absorption spectra. [Pg.251]

In fact, in this example, the phenyl group takes part in the conjugation of the system and a batho chromic shift is obsen-ed. [Pg.263]

When benzaldehyde or its substituted derivatives are added to carbon disulfide and a-aminonitrile, the corresponding 2-mercapto-5-(p-R-benzylideneamino)thiazoles (215), R = hydrogen atom or a propenyl or phenyl group and Ar = aryl, are obtained (Scheme 112) (393, 442, 694). Yields ranged from 40 to 60% (Table II-34b). [Pg.286]

The same isomerization also occurs with diarylthiazoles, but when two adjacent phenyl groups are present, even in the final product, a photochemical cyclization gives rise to a polycyclic benzothiazole (Scheme 3) (213,218,219). [Pg.376]

Some studies on the quatemization of arylthiazoles have been published, among them the quatemization of 2-methyI-4-phenyl thiazole in various solvents (263). The order of reactivity is the following 2-methyl-4-phenyl > 2-methyI-4-(3-nitrophenyl) > 2-methyl-4-(2-chlorophenyl) > 2-methyl-4-(4-nitrophenyl). Introduction of a phenyl group in the... [Pg.391]

We can focus on the charge distribution m an ylide by replacing the phenyl groups + ... [Pg.731]

R, alkyl group Ar, aryl group Ph, phenyl group. [Pg.783]

Phenyl groups impart resistance to temperature variations, flexibility under heat, resistance to abrasion, and compatibility with organic products. [Pg.1023]


See other pages where Groups phenyl is mentioned: [Pg.68]    [Pg.304]    [Pg.2543]    [Pg.236]    [Pg.62]    [Pg.185]    [Pg.202]    [Pg.6]    [Pg.30]    [Pg.221]    [Pg.253]    [Pg.57]    [Pg.224]    [Pg.25]    [Pg.117]    [Pg.70]    [Pg.241]    [Pg.243]    [Pg.18]    [Pg.147]    [Pg.310]    [Pg.379]    [Pg.438]    [Pg.602]    [Pg.1290]    [Pg.566]    [Pg.9]   
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2-Phenyl-2- anthrylmethyl esters to protect carboxyl groups

Aggregation, phenyl group

Anchoring effect phenyl groups

Arenes phenyl group oxidation

Associations phenyl group

Charge delocalization into phenyl group

Cyclopropanes Substituted with Phenyl(Aryl) Groups

Easily oxidized phenyl group

Effect of phenyl group

Effects 1-phenyl group substitution

Electroactive, phenyl group

Electron-withdrawing effect of a phenyl group

Elimination phenyl groups

Enhancer phenyl group

Factors affecting phenyl group

Fluorescence energy transfer from phenyl group

Functional groups phenyl

Group migration 1.2- phenyl

Hydrocarbons phenyl group

Hydroperoxide groups from phenyl group

Jump model, three-bond, phenyl group

Jump model, three-bond, phenyl group motion simulation

Nickel-phenyl group

O-Methyl-S-phenyl acetals and ketals protect carbonyl groups

Of phenyl groups

Organosilicon compounds phenyl groups

Palladium 2- phenyl groups

Phenyl esters, to protect carboxyl groups

Phenyl group Phosphoric acid

Phenyl group The benzene molecule minus

Phenyl group The benzene molecule minus one hydrogen atom

Phenyl group contrasted with benzyl

Phenyl group displacement

Phenyl group displacement selectivity

Phenyl group grafted polymer

Phenyl group interactions

Phenyl group ionization constants

Phenyl group isocyanate

Phenyl group migration protonated ketones

Phenyl group motion simulation

Phenyl group motions

Phenyl group rotations

Phenyl group stacking

Phenyl group stacks

Phenyl group structure

Phenyl group, 1,3-shifts

Phenyl group, interaction with

Phenyl group, interaction with aromatic structures

Phenyl group, introduction into

Phenyl group, introduction into system

Phenyl group, substitution

Phenyl group/ring

Phenyl group: defined

Phenyl groups group

Phenyl groups polystyrene

Phenyl groups, adding

Phenyl groups, analytical determination

Phenyl groups, substituted

Phenyl groups, substituted, electronic effects

Phenyl neighbouring group participation

Preparation of branched oligomethyl(phenyl)siloxanes with metacrylethoxyl groups in the lateral chain

Reaction chromatography phenyl groups

Silicon-phenyl groups

Silicon-phenyl groups determination

Silicone polymers phenyl groups

Siloxanes phenyl groups

Thermally activated phenyl group

Vibrational spectra phenyl group

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