Synthesis of new 2-(alkenylsulfanyl)pyrimidine derivatives
作者:E. P. Levanova、V. A. Grabel’nykh、V. S. Vakhrina、N. V. Russavskaya、A. I. Albanov、N. A. Korchevin、I. B. Rozentsveig
DOI:10.1134/s1070428014030221
日期:2014.3
Isothiuroniumsalts prepared by treatment of allyl bromide, 2,3- and 1,3-dichloropropenes, and 1,3-dichlorobut-2-ene with thiourea reacted with pentane-2,4-dione and 4,4,4-trifluoro-1-(thiophen-2-yl)-butane-1,3-dione to afford new pyrimidine derivatives, 2-(alkenylsulfanyl)-4,6-dimethyl- and 2-(alkenylsulfanyl)-4-(thiophen-2-yl)-6-(trifluoromethyl)pyrimidines.
Features of the synthesis of unsaturated sulfides proceeding from (2-chloroprop-2-en-1-yl)isothiouronium chloride
作者:E. P. Levanova、V. S. Vakhrina、V. A. Grabel’nykh、I. B. Rozentsveig、N. V. Russavskaya、A. I. Albanov、E. R. Sanzheeva、N. A. Korchevin
DOI:10.1134/s1070428015020037
日期:2015.2
Procedure of synthesis of sulfides containing a chloropropenyl fragment sensitive to bases was modified. The change in the sequence of reagents addition ensuring a contact of isothiouronium salt with a minimal base quantity and the application of a mixture hydrazine hydrate-alkali allowed the preparation of target sulfides under mild conditions in up to 93% yields.
Spectral and Quantum-Chemical Study of Acid-Catalyzed Heterocyclization of S-(2-Chloroprop-2-EN-1-YL)Isothiuronium Chloride with Acetylacetone
作者:L. M. Sinegovskaya、V. A. Shagun、E. P. Levanova、N. A. Korchevin、I. B. Rozentsveig、V. I. Smirnov
DOI:10.1007/s10593-014-1488-1
日期:2014.6
The reactions of S-(2-chloroprop-2-en-1-yl)isothiuronium chloride with acetylacetone in acetic acid were studied by the methods of quantum chemistry, as well as by UV and IR spectroscopy. The solvent effects on the thermodynamic and kinetic characteristics of 2-[(2-chloroprop-2-en-1-yl)sulfanyl]- 4,6-dimethylpyrimidine formation were studied within the framework of DFT with the B3LYP method.