Zobrazeno 1 - 10
of 74
pro vyhledávání: '"A. N. Lyshchikov"'
Publikováno v:
Pharmaceutical Chemistry Journal. 55:265-268
The trace mineral composition of marsh trefoil at different plant-formation periods was studied by atomic absorption spectrometry. The bioaccumulation of Fe, Cu, and Zn was insignificant during flowering. Also, the contents of physiologically active
Publikováno v:
Industrial laboratory. Diagnostics of materials. 87:5-10
A shot cut method for the determination of isoniazid in a solid dosage formulation (DF) has been developed. The method is based on isoniazid titration with a solution of photogenerated iodine obtained as a result of irradiation of an auxiliary soluti
Publikováno v:
Industrial laboratory. Diagnostics of materials. 85:15-21
The possibility of using water soluble pyrogallol red (PRWS) as a photometric reagent for the quantitative determination of antimony (III) in real objects has been studied. Formation of a colored product is observed in acidic solutions (pH 3.8 - 4.5)
Autor:
Svetlana V. Zhitar, Anastasiya U. Alekseeva, Ivan N. Bardasov, Nataliya N. Yaschenko, Anatoliy N. Lyshchikov
Publikováno v:
Heterocyclic Communications. 23:269-273
Annulated 1,8-naphthyridines were synthesized by one-pot reaction of aromatic aldehyde, malononitrile dimer and enehydrazinoketone.
Publikováno v:
Pharmaceutical Chemistry Journal. 50:695-697
A method for rapid determination of sodium thiosulfate in solution for injection that is based on titration of the active ingredient by photogenerated iodine is proposed. The titrant was produced by 1-2-min irradiation of an absorbing solution contai
Autor:
Ivan N. Bardasov, A. Yu. Alekseeva, A. N. Lyshchikov, Oleg V. Ershov, D. L. Mikhailov, Oleg E. Nasakin
Publikováno v:
Russian Journal of Organic Chemistry. 50:244-250
Reaction of arylmethylidene derivatives of malononitrile dimer with 1,3-cyclohexanediones in anhydrous methanol in the presence of sodium methylate as catalyst affords 4-amino-5-aryl-2-methoxy-6-oxo-5,6,7,8,9,10-hexahydrobenzo[b][1,8]naphthyridine-3-
Autor:
Victor A. Tafeenko, Ya. S. Kayukov, A. N. Lyshchikov, A. V. Eremkin, Oleg E. Nasakin, Oleg V. Ershov
Publikováno v:
Russian Journal of Organic Chemistry. 44:570-576
2-(4-Amino-2,5-dihydro-1H-imidazol-4-ylidene)malononitriles were synthesized by three-component reaction of tetracyanoethylene, carbonyl compound, and ammonium acetate. The synthesis can be performed in two steps with intermediate isolation of 2-amin
Publikováno v:
Russian Journal of Organic Chemistry. 43:1537-1544
In reaction of alkyl 2-amino-5,6-dialkyl-3-cyanopyridine-4-carboxylates with isocyanates formed unstable ureas, and with nitrous acid at 60–70°C alkyl 5,6-dialkyl-2-oxo-1,2-dihydro-4-pyidinecarboxylates were obtained. It was shown for the latter t
Publikováno v:
Chemistry of Heterocyclic Compounds. 40:460-464
An unusual direction has been found for the interaction of alkyl 5,6-dialkyl-2-amino-3-cyanopyridine-4-carboxylates with primary amines leading to the formation of 2,6,7-trialkyl-4-amino-2,3-dihydro-1H-pyrrolo[3,4-c]pyridine-1,3-diones.
Autor:
A. N. Lyshchikov, Ya. S. Kayukov, O. V. Kayukova, A. N. Vasiliev, O. V. Poulkherovskaya, Vladimir N. Nesterov, Oleg E. Nasakin
Publikováno v:
Chemistry of Heterocyclic Compounds. 37:309-314
An unusual route has been found for the hydrolysis of 3-amino-1,1-dialkoxy-6,7-dialkyl-4-aryl-3a,4,5,7a-tetrahydro-1H-pyrrolo[3,4-c]pyridine-3a,7a-dicarbonitriles in acidic medium which leads to the formation of alkyl 5,6-dialkyl-2-amino-3-cyanopyrid