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1.
The reaction of tetrazole and a series of its 1-substituted derivatives with formaldehyde and alkylamines under mild conditions results in aminomethylation of the heterocyclic ring at the carbon atom with the formation of the corresponding Mannich bases. It was found that strong acids (HCl and CF3COOH) have an activating action during the process. An ylide mechanism of the reaction was proposed from the data obtained.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 66–71, January, 1991. 相似文献
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V. P. Lesnyak D. I. Shiman L. V. Gaponik F. N. Kaputskii A. I. Lamotkin Zh. V. Bondarenko 《Russian Journal of Applied Chemistry》2007,80(2):295-299
The influence exerted by copolymers of the C9 fraction of liquid pyrolysis products of petroleum raw materials with maleic anhydride and by their esterification products, added to paper pulp, on the main paper properties was examined. 相似文献
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Ivashkevich O. A. Gaponik P. N. Matulis Vit. E. Matulis Vad. E. 《Russian Journal of General Chemistry》2003,73(2):275-282
The enthalpies of formation and total energies of a series of 1- and 2-substituted tetrazoles in the gas phase and in solution were calculated by MNDO and AM1 semiempirical methods and by a set of nonempirical procedures. The effect of solvent on the relative stability of N-substituted tetrazoles was estimated in terms of the PCM, SM5, and SCRF models. The possibility for isomerization of N-substituted tetrazoles, depending on the substituent in position 1 or 2, was studied at the MP2/6-31G*//HF/6-31G* level. According to the results of nonempirical calculations, 2-substituted tetrazoles are more stable in the gas phase, in keeping with the experimental data for the corresponding isomers. The solvent nature is an important factor affecting isomerization of N-substituted tetrazoles: Rise in the solvent polarity leads to displacement of the equilibrium toward 1-substituted isomers. 相似文献
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O. A. Ivashkevich P. N. Gaponik V. N. Naumenko 《Chemistry of Heterocyclic Compounds》1987,23(2):198-200
On the basis of13C NMR spectra of tetrazole-containing vinyl monomers, the resonance R constants of a series of tetrazolyl groups have been estimated.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 236–237, February, 1987.The authors thank E. V. Borisov for his help in taking the NMR spectra. 相似文献
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Synthesis of Petroleum Polymeric Resin by Cationic Polymerization of the C9 Fraction 总被引:2,自引:0,他引:2
Kaputskii F. N. Mardykin V. P. Gaponik L. V. Lesnyak V. P. Kostyuk S. V. Mil'chanina T. L. 《Russian Journal of Applied Chemistry》2002,75(6):1006-1008
Cationic oligomerization of the C9 fraction of liquid pyrolysis products of petroleum raw materials, catalyzed by aluminum trichloride diphenyl ether complex, was studied, and a procedure was developed for preparation of a petroleum polymeric resin and petroleum polymerizate to be used as film-forming agents in paint-and-varnish materials. 相似文献
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Alexander S. Lyakhov Dmitry O. Ivashkevich Sergei V. Voitekhovich Pavel N. Gaponik 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(12):m563-m564
The title compound, [CuCl2(C5H11N5)], is the first structurally characterized molecular chelate complex involving an α‐aminoalkyltetrazole. There are two complex molecules in the asymmetric unit. The ligand molecules are bidentate. Both Cu atoms reveal rather distorted square‐planar coordinations. The complex molecules are linked together by van der Waals interactions only. 相似文献
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