501037-45-2Relevant academic research and scientific papers
Synthesis and complexing properties of alkyl (3-oxo-2,3-dihydrothiophen-2- ylidene)- and (4-oxothiazolidin-5-ylidene)acetate derivatives
Kosterina,Morzherin,Kramarenko,Berseneva,Matern,Tkachev,Bakulev
, p. 866 - 869 (2007/10/03)
Condensation of dimethyl and diethyl acetylenedicarboxylate with thioacetamides gave the corresponding alkyl (3-oxo-2,3-dihydrothiophen-2- ylidene)- and (4-oxothiazolidin-5-ylidene)acetates. Treatment of these compounds with zinc in acetic acid resulted in reduction of the exocyclic double bonds. The products can be used in membrane processes as sodium cation carriers.
E-Z-izomerization of 2-methylenethiazolidin-4-ones
Morzherin,Kosterina,Berseneva,Dehaen,Bakulev
, p. 1292 - 1297 (2007/10/03)
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-d6. 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-ethoxycarbonylmethylenethiazolidin-4-ones with the sodium cation were determined by 1H NMR spectroscopy.
