The equilibrium concentrations of E- and Z-isomers of thiazolidin-4-ones containing exocyclic double bonds in positions 2 and 5 of the cycle were determined in DMSO-d(6). The influence of the nature of the substituents on the equilibrium position was found. Electron-releasing substituents stabilize the E, Z-configuration and electron-withdrawing substituents stabilize the Z,Z-configuration. The association constants of E- and Z-2-ethoxycarbonyl-methylenethiazolidin-4-ones with the sodium cation were determined by H-1 NMR spectroscopy.
DANKOVA, E. F.;BAKULEV, V. A.;KOLOBOV, M. YU.;SHISHKINA, V. I.;YASMAN, YA+, XIMIYA GETEROTSIKL. SOED.,(1988) N 9, S. 1269-1273
作者:DANKOVA, E. F.、BAKULEV, V. A.、KOLOBOV, M. YU.、SHISHKINA, V. I.、YASMAN, YA+
DOI:——
日期:——
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作者:Yu. Yu. Morzherin、M. F. Kosterina、V. S. Berseneva、W. Dehaen、V. A. Bakulev
DOI:10.1023/a:1020912932335
日期:——
The equilibrium concentrations of E- and Z-isomers of thiazolidin-4-ones containing exocyclic double bonds in positions 2 and 5 of the cycle were determined in DMSO-d(6). The influence of the nature of the substituents on the equilibrium position was found. Electron-releasing substituents stabilize the E, Z-configuration and electron-withdrawing substituents stabilize the Z,Z-configuration. The association constants of E- and Z-2-ethoxycarbonyl-methylenethiazolidin-4-ones with the sodium cation were determined by H-1 NMR spectroscopy.
Synthesis and properties of 5-amino-1,2,3-thiadiazole-4-carbothioamides
作者:E. F. Dankova、V. A. Bakulev、M. Yu. Kolobov、V. I. Shishkina、Ya. B. Yasman、A. T. Lebedev