Polyphosphoric acid esters

Phosphoric and polyphosphoric acid esters Perfluorinated anionics Sulfonic acid salts Strong surface tension reducers Good oil in water emulsifiers Soluble in polar organics Resistant to biodegradation High chemical stability Resistant to acid and alkaline hydrolysis... 

Formamide is said" to retard phosphorylation by the polyphosphoric acid ester. 

A (1—>5)-linkage for the polyribose is expected to be a preponderant linkage, based on the relative reactivities of primary and secondary hydroxyl groups 2 and on the tendency 1 of D-ribose to adopt the furanose form. However, the anomeric configuration of the polyribose is, most probably, a mixture of a-D and /3-d linkages, since a mixture of D-ribose and adenine, under the influence of polyphosphoric acid esters,w gave, among other products, approximately equal proportions of adenosine and its a-D isomer. 2... 

Phosphoric and Polyphosphoric Acid Esters, R(OC2H4)xOP(0)(0 M+)2 and [R(OC2H4)xO]2P(0)0 M+ Mainly phosphated POE alcohols and phenols, some sodium alkyl phosphates (not oxyethylenated). The POE materials are available in free acid form or as sodium or amine salts. Products are mixtures of monobasic and dibasic phosphates. 

This method is also applicable to pyrimidines with monoalkylated 6-amino groups.206 If the reaction is performed at 100°C with polyphosphoric acid,207 with polyphosphoric acid esters,208 or with trimethylsilyl trifluoroacetate,209 the 6-carboxy group will be retained. 

However, various attempts to prepare compound (41) by condensation of compound (40) with 3,4,5-trimethoxybenzoic acid gave poor results, although a method employing Nafion-H (ref. 51) and polyphosphoric acid ester (ref. 52) afforded compound (41) in low yield (below 30 %) accompanied with a by-product (42). Compound (42) was identified by comparison with an authentic sample, which was synthesized by the condensation of 2-methoxy-3,4-methylenedioxy-benzaldehyde and 3,4,5-trimethoxy-1 -bromobenzene followed by oxidation of the resulting benzhydrol. Moreover, the condensation of compound (4 1 ) with diethyl succinate to give compound (43) in the next step was unsuccessful. 

Polyphosphoric acid, ammonium salt. See Ammonium polyphosphate Polyphosphoric acids, compds. with triethanolamine Polyphosphoric acids, esters with triethanolamine. See TEA-polyphosphate Polyphosphoric acid sodium salt Polyphosphoric acids, sodium salts. See Sodium polyphosphate Polyphosphoric acid, triethanolamine ester. 

Equimolar amounts of N-phthaloyl-j -alanine and p-nitrophenol refluxed 0.5 hr. or stored 24 hrs. at room temp, with polyphosphoric acid ester prepared from P2O5 and ethyl ether in chloroform N-phthaloyl-j -alanine p-nitrophenyl ester. Y 87%. F. e. s. Y. Kanaoka et al., Ghem. Ind. 196A, 2102. 

Polyoxyl 20 stearate. See PEG-20 stearate Polyoxyl 40 stearate. See PEG-40 stearate Polyoxyl 50 stearate. See PEG-50 stearate Polyoxyl 55 stearate. See PEG-55 stearate Polyoxymethylene glycols. See Formaldehyde Poly [oxy(methylsilylene)]. See Methicone Polyoxypropylene (9). See PPG-9 Polyoxypropylene (12). See PPG-12 Polyoxypropylene (17). See PPG-17 Polyoxypropylene (20). See PPG-20 Polyoxypropylene (26). See PPG-26 Polyoxypropylene (30). See PPG-30 Polyoxypropylene (34). See PPG-34 Polyoxypropylene (40). See PPG-40 Polyoxypropyleneamine. See Polyether polyol Polyoxypropylene (3) methyl ether. See PPG-3 methyl ether Polyoxypropylene/polyoxyethylene block polymer Polyoxypropylenefpolyoxy-ethylene copolymer. See EOfPO block polymer or copolymer Polyoxypropylene triol. See Polyether polyol Polyphosphoric acid, ammonium saH. See Ammonium polyphosphate Polyphosphoric acids, compds. with triethanolamine Polyphosphoric acids, esters with triethanolamine. See TEA-polyphosphate Polyphosphoric acid sodium saH. See Sodium polyphosphate Polyphosphoric acids, potassium saHs. See Potassium polyphosphate Polyphosphoric acids, sodium salts. See Sodium polyphosphate Polyphosphoric acid, triethanolamine ester. See TEA-polyphosphate Polypropene. See Polypropylene Polypropylene CAS 90034)7-0... 

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