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25.183  Articles
1 of 2.519 pages  |  10  records  |  more records»
Previously designated a comfortable and effective scheme of 3,7-disubstituted [1,2,4]triazolo[4,3-a]pyrazin-8(7H)-ones synthesis was spread to derivatives of ?-(7-aryl-8-oxo-7,8-dihydro[1,2,4]triazolo[4,3-a]pyrazin-3-yl) alkylcarboxylic acids. Our approac... see more

The latest published data on heterocyclization of amides of alkenylcarboxylic acids have been systematized. It has been proven that the electrophilic intramolecular cyclization reaction of functionally substituted olefins opened in the 70s of the las... see more

Previously designated a comfortable and effective scheme of 3,7-disubstituted [1,2,4]triazolo[4,3-a]pyrazin-8(7H)-ones synthesis was spread to derivatives of ?-(7-aryl-8-oxo-7,8-dihydro[1,2,4]triazolo[4,3-a]pyrazin-3-yl) alkylcarboxylic acids. Our approac... see more

The structures of the row of amides of saturated hydrocarbons were investigated. The amides of C1-C5 row were investigated. The equilibrium geometries of molecules were identified. The total electronic energies were computed at SCF, MP2 and PM3 levels of ... see more

The interaction between Pd(II) and asparagines (Asn) in aqueous solutions with the physiological concentration of chloride ions (0.15 mol/L KCl) has been studied by election spectroscopy and pH potentiometry depending on the ratio of Pd(II):Asn and pH. Th... see more

The role of the electrophilic intramolecular cyclization (EIC) reaction of unsaturated carboxylic acid amides has been described for the design of arylthio-containing lactams and lactones. In order to identify the effect of the styryl moiety on ... see more

Aim. To study the effect of the structural parameters of styrylacetic acid amides on the course of the reaction of the electrophilic intramolecular cyclization under the action of polyphosphoric acid and search the rational approaches to obtain N-unsubsti... see more

Himic acid hydrazide derivatives are promising in terms of practical use compounds due to their wide range of biological effects (primarily neurotropic activity) and their synthetic potential. Earlier investigated in detail the methods of synthesis of hyd... see more

Two types of heterometallic (Fe(III),Na) silsesquioxanes—[Ph5Si5O10]2[Ph10Si10O21]Fe6(O2?)2Na7(H3O+)(MeOH)2(MeCN)4.5.1.25(MeCN), I, and [Ph5Si5O10]2[Ph4Si4O8]2Fe6Na6(O2?)3(MeCN)8.5(H2O)8.44, II—were obtained and characterized. X-ray studies established di... see more

1 of 2.519 pages  |  10  records  |  more records»