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V. M. Belikov Yu. N. Belokon' V. A. Karginov N. S. Martinkova M. B. Saporovskaya 《Russian Chemical Bulletin》1976,25(6):1233-1238
| 1. | The formation of protonated and free Schiff's bases from S-alanine and salicylaldehyde was studied quantitatively by the PMR method in the interval of pD 9.0–12.0. |
| 2. | The rate constants of the racemization of S-alanine and its Schiffs base with salicylaldehyde protonated at the nitrogen were determined, and they were compared with the analogous constants for N-salicyl-idene-S-alaninate complexes of Cr(III), Rh(III), and Co(III) and the Schiffs base from pyridoxal and S-alanine. |
| 3. | The basic role of the metal in the model reactions consists of increasing the concentration of reactive particles in solution as a result of coordination of the Schiffs base with the metal ion. |
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Yu. N. Belokon' S. V. Vitt M. M. Dolgaya V. M. Belikov P. V. Petrovskii 《Russian Chemical Bulletin》1972,21(12):2702-2705
Conclusions The tetra- and dicyanoethylation products of the sodium bis-(N-salicylideneglycinato)cobaltate(III) complex were isolated and characterized. The condensation of the complex with methyl acrylate and aeetaldehyde respectively leads to the formation of glutamic acid and racemic threonine.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2772–2776, December, 1972. 相似文献
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Yu. N. Belokon' V. A. Karginov V. I. Tararov V. M. Belikov 《Russian Chemical Bulletin》1976,25(1):54-57
| 1. | Diastereomeric complexes of - and -bis-[N-salicylidene-S-alaninato]chromate(III)K and - and -bis-[N-salicylidene-S-valinato]chromate(III)K were synthesized and chromatographically separated. The absolute configuration of the diastereomers was demonstrated with the aid of ORD curves. |
| 2. | The kinetics of the epimerization of - and -bis-[N-salicylidene-S-alaninato]chromate(III)K and - and -bis-[N-salicylidene-S-valinato]chromate(III)K under the action of OH– ions in water was studied: it was shown that the proton of the amino acid fragment is less labile in these complexes than in the isostructural complexes of Co3+ and Rh3+. |
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M. I. Bardamova V. A. Lyubushkin R. N. Myasnikova I. L. Kotlyarevskii 《Russian Chemical Bulletin》1970,19(5):1108-1110
Conclusions A method of synthesis of arylhydroxyacetic acids and ammo acids derived from ethinylphenols has been developed in view of possible physiological activity of these compounds.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1170–1172, May, 1970. 相似文献
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From the measurements of conductivity, diffusion coefficient etc., Jander indicated the presence of several isopoly-anions of molybdenum under different pH conditions. He and subsequent workers in the field dealt with solutions only. In the present work one free molybdic acid, and one ammonium acid molybdate were isolated in solid condition at pH 4.6 and 2. On analysis, their compositions were found to be H4Mo3O11 and NH4H5Mo6O21 (or (NH4)2H4Mo7O24) respectively. 相似文献
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The structural change from the porphyrin free base to monoacid and diacid by successive protonation has been studied by the IR, visible and NMR spectroscopy. The results have indicated that the cation and anion of the porphyrin diacid are strongly associated through H-bonding. The far IR spectra show especially marked differences in the free base, monoacid, and diacid due to the changes of the inner core of the porphyrin ring. 相似文献
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Summary A reaction mechanism for the saponification of the chlorodilactone from epoxy-jaconecic acid with aqueous alkali has been proposed.Khimiya Prirodnykh Soedinenii, Vol. 2, No. 4, pp. 223–225, 1966 相似文献
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Conclusions Some previously unknown phenothiazinylaminoalkylphosphinous acids were synthesized.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1571–1573, July, 1971. 相似文献