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Featured researches published by I. I. Popov.


Chemistry of Heterocyclic Compounds | 1978

Synthesis of ?-(4,5-dihalofuryl)acrylic and -propiolic acids

I. I. Popov; Z. N. Nazarova; A. P. Chumak

Reaction of 4,5-dihalofurfurals with acetaldehyde and with carbethoxybromomethylenephosphorane gave, respectively, 4,5-dihalofurylacroleins and β-(4,5-dihalo-2-furyl)-α-bromoacrylic acid esters. The latter were converted to 4,5-dihalo-2-furylpropiolic acids by the action of alkali.


Chemistry of Heterocyclic Compounds | 1973

Transformations of 2-formyl-n-nitroarylimidazoles

I. G. Uryukina; I. I. Popov; A. M. Simonov; L. M. Sitkina

Esters of-1-aryl-β-2-imidazolylacrylic acid were synthesized by the Wittig reaction from 2-formyl-1-arylimidazoles. The reaction of these aldehydes with arylamines and 1,2-dianilinoethane was examined.


Chemistry of Heterocyclic Compounds | 1996

INVESTIGATIONS OF UNSATURATED AZOLES. 13. SYNTHESIS AND SOME REACTIONS OF 1-ALKYLBENZIMIDAZOLES

I. I. Popov

Methods of direct alkylation of benzimidazoles by haloatkanes in homogeneous medium and under phase transfer catalysis conditions together with cyanoethylation by acrylonitrile are reported. The dealkylation of quaternary benzimidazole salts was also studied.


Chemistry of Heterocyclic Compounds | 1976

Research on benzimidazole derivatives

P. V. Tkachenko; A. M. Simonov; I. I. Popov

The acylation of 2-amino derivatives of benzimidazole and pyridine withβ-aryl-α, β-unsaturated carboxylic acid chlorides gave the corresponding amides, which were converted to 2-oxo derivatives of pyrimido [1,2-a]benzimidazole and pyridine by the action of bases.


Chemistry of Heterocyclic Compounds | 1975

Research of benzimidazole derivatives. XXXVI. Synthesis and transformations of N-propargyl-substituted 2-aminobenzimidazoles

I. I. Popov; P. V. Tkachenko; A. M. Simonov

Abstract1-(2′-Propynyl)-2-aminobenzimidazole and 1,3-di(2′-propynyl)-2-iminobenzimidazoline, which are cyclized by the action of bases to imidazo[1,2-a]benzimidazole derivatives, were obtained by alkylation of 2-aminobenzimidazole with propargyl bromide. The cyclization proceeds with the formation of intermediate N-propadienyl derivatives.


Chemistry of Heterocyclic Compounds | 1993

Conversions of 2-α-chloroalkylbenzimidazoles

I. I. Popov

Upon interaction with caustic in a DMSO medium, 2-chloromethylbenzimidazoles are subjected to cyclodimerization, forming 5H,12H-pyrazino[1,2-a:4,5-a′]bis-benzimidazoles; in the presence of nucleophiles (ammonia, amines, anions of β-diketones), under the indicated conditions, the products are the corresponding substituted amines or derivatives of pyrrolo[1,2a]benzimidazole.


Chemistry of Heterocyclic Compounds | 1987

Condensed derivatives of benzazoles. 1. Synthesis of 6- and 5-substituted benzimidazo[2,1-b]quinazolin-12-ones

I. I. Popov; S. L. Boroshko; B. A. Tertov; S. P. Makarov; A. M. Simonov; B. Ya. Simkin

Abstract6(5)H-Benzimidazo[2,1-b]quinazolin-12-one was obtained in high yield by condensation of benzimidazole-2-sulfonic acid with anthranilic acid. Methods for the introduction of substituents selectively into the 5 and 6 positions of this heterocycle were developed.


Chemistry of Heterocyclic Compounds | 1978

Research on unsaturated azole derivatives

A. A. Zubenko; I. I. Popov; A. M. Simonov

The reaction of benzimidazole with phenylacetylene, ethyl propiolate, and their β-bromo derivatives leads to the corresponding β-substituted N-vinylbenzimidazoles.


Chemistry of Heterocyclic Compounds | 1975

Research on unsaturated azole derivatives: V. Transformations of 3-formylindazoles in the wittig reaction

I. I. Popov; A. A. Zubenko; A. M. Simonov; D. A. Tertov; P. P. Onishchenko

Abstract3-Formylindazoles are converted to 1-methyl- and 2-methyl-substitutedβ-(3-indazolyl)acrylic andα-bromoacrylic acids by the Wittig reaction. Dehydrohalogenation of theβ-(3-indazolyl)-α-bromoacrylic acid esters gaveβ-(3-indazolyl)propiolic acids, the decarboxylation of which gives isomeric 1-methyl- and 2-methyl-substituted 3-ethynylindazoles.


Chemistry of Heterocyclic Compounds | 1974

Research on benzimidazole derivatives XXXIV. Some transformations of N-alkenyl- and N-alkynyl-substituted benzimidazoles

P. V. Tkachenko; I. I. Popov; A. M. Simonov

Benzimidazole was alkylated with 1,3-dibromo-1-propene, 2,3-dibromo-1-propene, and 1,2,3-tribromopropane, and some of the properties of the N-substituted benzimidazoles obtained were examined. It is shown that 1-(2′-propynyl)benzimidazole is readily rearranged to the 1-propadienyl derivative under the conditions of the Favorskii reaction.

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A. M. Simonov

Southern Federal University

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A. A. Zubenko

Southern Federal University

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P. V. Tkachenko

Southern Federal University

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B. A. Tertov

Southern Federal University

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S. L. Boroshko

Southern Federal University

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Z. N. Nazarova

Southern Federal University

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B. Ya. Simkin

Southern Federal University

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S. P. Makarov

Southern Federal University

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A. F. Pozharskii

Southern Federal University

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A. P. Chumak

Southern Federal University

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