- Molecular and crystal structure of 4,5,4',5'-tetrahydro-2,2'-(l,4-phenylene)bisoxazoline
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4,5,4',5'-Tetrahydro-2,2'-(l,4-phenylene)bisoxazoline, which is one of the most promising stabilizers-consolidators of heterochain polymers, was studied by X-ray structural analysis.
- Pankratov,Mitina,Doroshenko, Yu E.,Yaskevtch,Khrustalev,Lindeman,Struchkov, Yu T.
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- Preparation of an aromatic bisoxazoline
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The invention relates to a process for the preparation of an aromatic bisoxazoline in which, in a first step, an aromatic carboxylic acid or an ester hereof reacts with an alkanolamine, after which the hydroxyalkylamide obtained is in a second step converted into an aromatic bisoxazoline in the presence of a catalyst. The catalyst is phosphinic acid, a (C1-C26) alkyl phosphinic acid, a (C6-C20)aryl phosphinic acid or an ester or an anhydride derived from one of these acids.
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Page column 5
(2008/06/13)
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- SYNTHESIS, STRUCTURE, AND SPECTRAL PROPERTIES OF SOME BIOXAZOLES
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Syntheses of systems containing two oxazole rings from aldehydes obtained by formylating 2-phenyl-, 2-(2-furyl)-, and 2-(2-thienyl)oxazole have been developed.Terephthalate and thiophen-2,5-dicarboxylate esters have been used to obtain 2,2'-(1,4-phenylene)- and 2,2'-(2,5-thienylene)bisoxazoles.The PMR, UV, and luminescence spectra of these systems have been examined, and quantum chemical calculations carried out in the PPP approximation.
- Belen'kii, L. I.,Cheskis, M. A.,Zvolinskii, V. P.,Obukhov, A. E.
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p. 654 - 663
(2007/10/02)
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- Phenolic esteramide antioxidants
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Novel phenolically substituted esterbisamides as antioxidants useful for the protection of organic materials such as synthetic and natural rubbers, plastics and petroleum products against oxidative degradation.
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- Aminolysis of N-acyllactams
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The overall second-order rate constants of aminolysis of N-benzoyllactams of different ring size, the rate constants of aminolysis of N,N'-isophthaloyl- and N,N'-terephthaloylbis(6-hexanelactam) to the first and second stages and the ratio of splitting of the exocyclic and endocyclic amide bond by octylamine were determined in THF at 50 deg C.The effect of the type of amine and medium on the rate of aminolysis was examined.
- Stehlicek, Jaroslav,Sebenda, Jan
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p. 2524 - 2531
(2007/10/02)
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