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Of benzyl phenyl ethers

The yield of diphenyl ether is approximately one-tenth that of benzyl phenyl ether and allyl phenyl ether (185). [Pg.396]

Bausch R, Schuchmann H-P, von Sonntag C, Benn R, Dreeskamp H (1976) CIDNP detection of the transient 4-benzyl-cydohexa-2,5-dienone in the photorearrangement of benzyl phenyl ether. J Chem Soc Chem Commun 418-419... [Pg.70]

The rearrangement reaction of a variety of alkyl phenyl ethers over a dealumi-nated HY zeolite has been shown to involve both intramolecular and intermolecular processes to afford phenol, (alkoxyalkyl)benzenes and alkylphenols as the main products. o-Benzylphenol has been obtained as the exclusive product in the rearrangement of benzyl phenyl ether in the presence of montmorillonite. The mechanism for a novel zeolite /3-catalysed rearrangement of alkoxybenzyl allyl ethers to aldehydes and ketones has been investigated by the use of cross-over reactions and deuterium labelling. The reaction was found to be mainly intramolecular and has been described as a nucleophilic attack of the double bond on the electrophilic benzylic carbon of the ether-Lewis acid complex, followed by a... [Pg.198]

Similar regioselectivity effects were obtained in the photolysis of benzyl phenyl ethers and methyl phenoxy acetates in 1 1 inclusion complexes with a- or -CD [276]. [Pg.77]

Patric DA, Bakunov SA, Bakunova SM, Jones SK, Wenzler T, Barzcz T, Kumar A, Boykin DW, Werbovetz KA, Brun R, Tidwell RR. Synthesis and antiprotozoal activities of benzyl phenyl ether diamidine derivatives. European Journal of Medicinal Chemistry 2013 67,310-324. Doi 10.1016/j.ejmech.2013.06.033. [Pg.80]

Tarbell and Petropoulos159 measured the rate of formation of phenol from benzyl phenyl ether catalysed by aluminium bromide and found it to be a first-order process. Moreover, the rate coefficient was the same as that for the formation of phenol from ortho benzyl phenol. Since the ratio of products (phenol ortho benzyl phenol) was unaffected by a large change in the temperature it was argued... [Pg.476]

As shown in Table IV, all phenols tested were confirmed to accelerate the conversion of phenyl benzyl ether. In this thermolysis, benzyl phenyl ether was decomposed to toluene and phenol (ca. 60%) and also isomerized to benzyl phenol (ca. 40%). [Pg.292]

In some model compound studies with the i-PrOH/KOH system we found that anthracene was converted to 9,10-dihydroanthracene in 64% yield. Benzyl phenyl ether was also studied and was converted to a polymeric material under the reaction conditions. There were no traces of phenol nor toluene, the expected reduction products. [Pg.300]

Note. In a recent paper, Miller and Stein have provided values for both C-C and C-0 bonds for a variety of coal model compounds, including bibenzyl and benzyl phenyl ether (11). Their rate constant for bibenzyl provides half-life values at 335°C and 400°C even larger than those discussed here, and it would seem on the basis of their data that at those low temperatures C-C scission in bibenzyl itself is too slow for thermal scission to be significant. [Pg.306]

One of the first kinetic studies of the fragmentation of a C—O bond in an ether radical anion was reported by Maslak and Guthrie. " In this study substituted benzyl phenyl ethers (as well as some other benzyl-type phenyl ethers) were treated with 2,4,6-tri-tert-butylnitrobenzene radical anion to produce ArCH20Ph or PhCH20Ar and the unimolecular decay of the anion radical was monitored using EPR. Despite some discrepancies between the values of the reported rate constants, ... [Pg.113]

Sn2 reaction of phenoxide with benzyl chloride to afford benzyl phenyl ether. [Pg.258]

Etherification of isohexides with substituted-benzyl chloride in aqueous sodium hydroxide, or by means of sodium hydride in dimethyl sulfoxide, yields mixtures of mono- and bis-ethers, which can be conventionally separated by distillation or by column chromatography.176 The preparation of some phenyl ethers was also described, using the tosylate-phenoxide exchange reaction. Monoethers (88) synthesized in this way were transformed into carbamates (89) by reaction with sodium cyanide-trifluoroacetic acid (see Scheme 18). [Pg.139]

Previous studies of the reactions of guaiacol (orthomethoxy-phenol) (3 ), dibenzyl ether (4 ), and benzyl phenyl amine (5) in dense water elucidated parallel hydrolysis and pyrolysis pathways, the selectivity to the latter increasing with water density. Reactant decomposition kinetics were interestingly nonlinear in water density and consistent with two mechanistic interpretations. The first involved "cage" effects, as described for reactions in liquid solutions (6 ). The second led to parallel pyrolysis and solvolysis reaction pathways wherein associated rate constants were dependent upon pressure. These two schemes are probed herein through the reactions of benzyl phenyl amine (BPA) in water and methanol. [Pg.67]

The cleavage of anisole to lithium phenoxide by lithium in refluxing THF in the presence of biphenyl has been known since 1961,4142 and in 1963 Eisch published a practical method for forming allyllithium 32 from allyl phenyl ether 31, again using lithium in the presence of biphenyl, but at 0 °C or below.43 Twelve equivalents (a six-fold excess) of lithium metal was required for good yields in this reaction. A similar reaction takes place between benzyl phenyl ether and lithium.44... [Pg.154]

Various metal catalysts accelerate the allylation of carbonyl and imine substrates. Triethylborane induced the addition of allylbenzoates, -phenyl ethers, and -benzyl ethers in the presence of Pd(PPh3)4 (Equation (153)).619... [Pg.197]

Syntheses of alkyl phenyl ethers, C,H, OR, are carried out by refluxing aqueous or alcoholic solutions of alkali phenolates with alkyl halides the yields vary with the nature of the alkyl halides (40-80%). The reactive halogen in benzyl halides is easily replaced by an alkoxyl group (95%). ° The choice of a solvent is sometimes important. Thus, in the preparation of the alkyl ethers of o- and p-hydroxybiphenyl from a mixttire of the phenol, alkyl halide, and powdered potassium hydroxide, high yields are obtained using acetone as a solvent, whereas, with alcohol as solvent, only small yields are obtained. Triarylmethyl chlorides react with alcohols directly (97%). ... [Pg.565]


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See also in sourсe #XX -- [ Pg.106 ]




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Benzyl ethers

Benzyl phenyl

Benzyl phenyl ether

Benzylic ethers

Ethers phenylic

Phenyl Ether

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