Aromatic oxy-acids

LQPs can be obtained by means of polycondensation of aromatic oxy-acids ( -oxybenzoic one), dicarboxylic acids (iso- and terephthalic ones) and bisphenols (static copolymers) and also by peretherification of polymers and monomers. 

Polycondensation of dicarboxylic acids witii acetylic derivatives of aromatic oxy-acids ( -oxybenzoic one) and bisphenols. 

The lower members of the homologous series of 1. Alcohols 2. Aldehydes 3. Ketones 4. Acids 5. Esters 6. Phenols 7. Anhydrides 8. Amines 9. Nitriles 10. Polyhydroxy phenols 1. Polybasic acids and hydro-oxy acids. 2. Glycols, poly-hydric alcohols, polyhydroxy aldehydes and ketones (sugars) 3. Some amides, ammo acids, di-and polyamino compounds, amino alcohols 4. Sulphonic acids 5. Sulphinic acids 6. Salts 1. Acids 2. Phenols 3. Imides 4. Some primary and secondary nitro compounds oximes 5. Mercaptans and thiophenols 6. Sulphonic acids, sulphinic acids, sulphuric acids, and sul-phonamides 7. Some diketones and (3-keto esters 1. Primary amines 2. Secondary aliphatic and aryl-alkyl amines 3. Aliphatic and some aryl-alkyl tertiary amines 4. Hydrazines 1. Unsaturated hydrocarbons 2. Some poly-alkylated aromatic hydrocarbons 3. Alcohols 4. Aldehydes 5. Ketones 6. Esters 7. Anhydrides 8. Ethers and acetals 9. Lactones 10. Acyl halides 1. Saturated aliphatic hydrocarbons Cyclic paraffin hydrocarbons 3. Aromatic hydrocarbons 4. Halogen derivatives of 1, 2 and 3 5. Diaryl ethers 1. Nitro compounds (tertiary) 2. Amides and derivatives of aldehydes and ketones 3. Nitriles 4. Negatively substituted amines 5. Nitroso, azo, hy-drazo, and other intermediate reduction products of nitro com-pounds 6. Sulphones, sul-phonamides of secondary amines, sulphides, sulphates and other Sulphur compounds... 

Resonances in the region — 5 to — 8 ppm from HDO arise from the ring-current-shifted protons due to those protons located above or below the aromatic amino acid residues and the porphyrins of oxy-Hb A (Fig. 8J). (9) Resonances in the region -6 to -20 ppm... 

Von Miller and Hofer 1 have applied their method for the electrolysis of organic oxy-acids to several aromatic acids containing substituents these experiments may briefly be mentioned here. 

Other than those of the carboxylic type for example, a mixture of p-toluene-sulfonic acid and triduoroacetic anhydride forms sulfones by reaction with suitably activated aromatic compounds. By the same technique, the hexa-nitrate esters of o-mannitol and D-glucitol were obtained by use of solutions of fuming nitric acid in trifluoroacetic anhydride at 0°. The probable reaction mechanisms of these and other examples of the conversion of oxy acids into reactive entities have been briefly considered. ... 

Nitroso-piperidine—Nitro-toluene—Azo-benzene, introduction of hydroxyl groups — Toluene-sulphone-amides— Saccharine—p-Nitro-o-toluene-sulphone - amide—Oxida -tion of aromatic oxy-carboxylic acids.76-78... 

Highly durable, chemically inert, thermo-stable aromatic polyesters can be produced by interaction of polymers containing links of n-oxy-benzoic acid, aromatic dioxy-compounds, for example of hydroquinone and aromatic dicarboxylic acids [40], Thermo-and chemically resistant polyesters of improved mechanical strength can be obtained by the reaction of -oxybenzoic acid, aromatic dicarboxylic acids, aromatic dioxy-compoimds and diaryl carbonates held in solid phase or in high-boiling solvents [41] at temperature 180 °C and lowered pressure, possibly in the presence of catalysts [42], Some characteristics of aromatic polyesters based on n-oxybenzoic acid are gathered in Table 7.1 [20],... 

It may be difficult to imagine the alkylation of a 3,5-dialkoxyphenylcarbanion in which no ortho chelators are available to assist deprotonation at the desired position, not to mention the disjoint relationship of this donor carbon to the oxy substituents present. A solution to this problem is provided by redox manipulations and incorporation of a removable acceptor group to affirm the donor site. Thus, the Birch reduction product of 3,5-dimethoxybenzoic acid readily undergoes alkylation, and oxidative decarboxylation generates the aromatic compound [273]. 

When paraformaldehyde is added to a solution of II in concentrated sulfuric acid at room temperature, a rapid reaction takes place, yielding colorless to orange polymeric compositions depending upon the ratio of reactants and the reaction condition employed (17). It is reasonable to assume that the polymerization of II with formaldehyde proceeds in a fashion similar to that of an activated aromatic ring with formaldehyde to yield as final products the diarylmethane and dimethylene oxy-derivatives, IV and V (Equation 9). 

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