Aryloxy acetates

Phenol B.P. M.P. Bromo Com. pound Acetate Benzoate p-NItro benzoate 3 5 D. nltro- benzoate Aryloxy- acetic Acid NN-DI- phenyl- carba- mate N-O- naphthyl carba- mate p-Tolu- enesul- phonate 2 4- Dlnltro- phenyl Ether... 

Phenols, in the presence of alkali, react with chloroacetic acid to give aryloxy-acetic acids, which are generally crystalline compounds with sharp melting points. (See also Expt 6.110.)... 

Carrotti, A., Altomare, C., Cellamare, S., Montforte, A. M., Bettoni, G., Loiodice, E., Tangari, N.,Tortorella,V., LEER and CoMEA studies on optical resolution of a-alkyl a-aryloxy acetic acid methyl esters on DACH-DNB chiral stationary phase,... 

In order to produce hetero-ring unsubstituted benzothiophenes an arylthioacetaldehyde acetal is generally employed, prepared in turn, from bromoacetaldehyde acetal and the thiophenol. An exactly parallel sequence produces 2,3-unsubstitutedbenzofurans. 2-Aryloxy-acetates (or 1-aryloxy-acetones) heated with DMFDMA, produce enamines which cycUse on treatment with zinc chloride, giving 3-unsubstituted benzofuran-2-carboxylates (3-unsubstituted 2-acetyl-benzofurans). ... 

Lee CM, Plattner JJ, Ours CW, et. al. [(Aminomethyl)aryloxy]acetic acid esters. A new class of high-ceiling diuretics. 1. Effects of nitrogen and aromatic nuclear... 

An important group of acylation reactions involves esters, in which case the leaving group is alkoxy or aryloxy. The self-condensation of esters is known as the Claisen condensation.216 Ethyl acetoacetate, for example, is prepared by Claisen condensation of ethyl acetate. All of the steps in the mechanism are reversible, and a full equivalent of base is needed to bring the reaction to completion. Ethyl acetoacetate is more acidic than any of the other species present and is converted to its conjugate base in the final step. The (3-ketoester product is obtained after neutralization. 

Aryloxy-l,2-diarylethanones can be cyclodehydrated to diarylbenzofurans by heating with sodium acetate and acetic anhydride in polyphosphoric acid. Quenching the hot reaction mixture with water leads to initially violent acid-catalysed hydrolysis of the excess anhydride. 

PCI 5 (followed by SOa) converts ethyl thioethers into alkylthiovinylphosphonic dichlorides (42)36 and acetals into alkoxy(aryloxy)vinylphosphonic dichlorides... 

Arylamino)-cyclohexadienones (21) rearrange in acid solution (often in alcohol or acetic acid solvents) to give 4-(aryloxy)-anilines (22) (Scheme 6). In some ways this... 

Aryl-, aryloxy- and arylthiocarboxylic acids, N-derivatized amino acids Quinine and quinidine carbamates Methanol—0.1 M 194 ammonium acetate, pH 6.0 (80 20)... 

The reactivity of acyl radicals inside and outside the solvent cage has been a matter of discussion. It has been postulated that aryloxy and acyl radicals could disproportionate within the cage to give phenol (or naphthol) and ketene (37) but the results are not conclusive (Scheme 14). On the one hand, photolysis of 1-naphthyl acetate in a solvent without abstractable H-like Freon 113 (1,1,2-trichl-oro-l,2,2-trifluoroethane) yields low amounts of 1-naphthol (< 0.1%) in comparison with the same reaction in acetonitrile (7%) [50]. This reveals that dispropor-... 

The DnPont photopolymeric system consists of polymeric binder resins, e.g. PVA, PMMA, cellnlose acetates and styrene-acrylates, reactive acrylic monomers, e.g. aryloxy or alkoxy acrylates, a dye sensitiser and a radical or charge transfer photoinitiator, e.g. DEAW and HABI respectively (see Chapter 4, section 4.5.2), and plasticisers. The process for producing the refractive index structures is as follows ... 

Alcohols add to certain substituted olefins (ketene acetals such as 1,1-di-aryloxy-l-alkenes) to form ortho esters [120a-c], The reaction has been reported to be acid-catalyzed [121a, b] but it may be carried out under basic conditions [120a-c, 122a, b, 123a, b] without any other catalysts. 

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