Search Results - "Izmest’ev, Alexei N."

Synthesis and antiproliferative activity characterization of new imidazothiazolotriazine oxindolylidene derivatives containing various substituents in the oxindole ring by Izmest’ev, Alexei N., Kravchenko, Angelina N., Gazieva, Galina A.

“…Condensation of 1,3-diethyltetrahydroimidazo[4,5- е ]thiazolo[3,2- b ][1,2,4]triazine-2,7-dione with isatins followed by framework rearrangement in the…”
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Synthesis of new functionalized thiazolidin-4-ones by the condensation of thioureas with dialkyl acetylenedicarboxylates by Streltsov, Andrey A., Izmest’ev, Alexei N., Strelenko, Yurii A., Kravchenko, Angelina N., Gazieva, Galina A.

“…[Display omitted] Thiazolidin-4-ones functionalized at the position 5 and their heterocycle-annulated analogues were obtained based on the reaction of…”
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Synthesis, Structure and Stereochemistry of Dispirocompounds Based on Imidazothiazolotriazine and Pyrrolidineoxindole by Izmest'ev, Alexei N, Karnoukhova, Valentina A, Larin, Alexander A, Kravchenko, Angelina N, Fershtat, Leonid L, Gazieva, Galina A

“…Methods for the synthesis of two types of isomeric dispirocompounds based on imidazothiazolotriazine and pyrrolidineoxindole, differing in the structure of…”
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Regioselectivity of (3+2) cycloaddition of azomethine ylides to activated olefins in the synthesis of spiro[oxindole-3,2′-pyrrolidine] derivatives by Izmest’ev, Alexei N., Gazieva, Galina А., Kravchenko, Angelina N.

“…The effect of the structure of the starting compounds on the regioselectivity of the (3+2) cycloaddition of azomethine ylides to olefins activated by…”
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Synthesis of new heterylmethylidene derivatives of isomeric imidazo[4,5-e]thiazolo-fused [1,2,4]triazines by Lugovoi, Maksim E., Izmest’ev, Alexei N., Kolotyrkina, Natalya G., Izmalkova, Ekaterina S., Kravchenko, Angelina N., Gazieva, Galina A.

“…[Display omitted] Novel 6-heterylmethylidene-3a,9a-diphenylimidazo[4,5-e]-thiazolo[3,2-b][1,2,4]triazines were synthesized by the three-component condensation…”
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Synthesis of imidazo[4,5- e ][1,3]thiazino[2,3- c ][1,2,4]triazines via a base-induced rearrangement of functionalized imidazo[4,5- e ]thiazolo[2,3- c ][1,2,4]triazines by Vinogradov, Dmitry B, Izmest'ev, Alexei N, Kravchenko, Angelina N, Strelenko, Yuri A, Gazieva, Galina A

“…A series of imidazo[4,5- ][1,3]thiazino[2,3- ][1,2,4]triazines was synthesized via a cascade sequence of hydrolysis and skeletal rearrangement of imidazo[4,5-…”
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A 1,3-dipolar cycloaddition of azomethine ylides to imidazo[4,5-e]thiazolo[2,3-c][1,2,4]triazine oxindolylidene derivatives in the synthesis of novel spirooxindole derivatives by Izmest’ev, Alexei N., Kravchenko, Angelina N., Gazieva, Galina A.

“…The stereochemistry of the 1,3-dipolar cycloaddition reaction of azomethine ylides to oxindolylidene derivatives of imidazo[4,5- e ]-thiazolo[2,3- c…”
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Dimroth-type N/S-interchange of N -aminothioglycolurils in the synthesis of 2-hydrazonoimidazo[4,5- d ]thiazolones by Vinogradova, Ekaterina E, Gazieva, Galina A, Izmest'ev, Alexei N, Karnoukhova, Valentina A, Kravchenko, Angelina N

“…An original method for the synthesis of 2-hydrazonoimidazo[4,5- ]thiazolone derivatives has been developed based on a one-pot acid-induced sequence of…”
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Synthesis of functionalized imidazo[4,5- e ]thiazolo[3,2- b ]triazines by condensation of imidazo[4,5- e ]triazinethiones with DMAD or DEAD and rearrangement to imidazo[4,5- e ]thiazolo[2,3- c ]triazines by Izmest’ev, Alexei N, Vinogradov, Dmitry B, Kolotyrkina, Natalya G, Kravchenko, Angelina N, Gazieva, Galina A

“…Two series of functionalized imidazothiazolotriazine derivatives were synthesized via the condensation of imidazo[4,5- e ]-1,2,4-triazine-3-thiones with…”
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Synthesis of 5-arylmethylidene-3-(arylmethylideneamino)thiazolidine-2,4-diones via triazine ring cleavage of tetrahydroimidazothiazolotriazinediones and their reactions with azomethine ylides by Izmest’ev, Alexei N., Gazieva, Galina A., Kolotyrkina, Natalya G., Daeva, Elena D., Kravchenko, Angelina N.

“…Cleavage of 1,3-dimethyl-3,3a,9,9a-tetrahydroimidazo[4,5- e ]thiazolo[3,2- b ][1,2,4]triazine-2,7(1 H ,6 H )-diones upon treatment with aromatic aldehydes has…”
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The synthesis and antitumor activity of novel 1-alkyl-3-phenyland 3-alkyl-1-phenylimidazothiazolotriazines by Izmest’ev, Alexei N., Isakov, Sergey S., Kravchenko, Angelina N., Gazieva, Galina A.

“…Two groups of isomeric imidazothiazolo[1,2,4]triazines and their oxindolylidene derivatives were obtained from…”
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A regioselective synthesis of imidazothiazolotriazines based on the cyclization of imidazotriazinethiones with phenacyl bromides by Vinogradov, Dmitry B., Izmest’ev, Alexei N., Kravchenko, Angelina N., Gazieva, Galina А.

“…Novel imidazothiazolotriazines were obtained as a result of the reaction of imidazo[4,5- e ][1,2,4]triazine-3-thiones with various phenacyl bromides. It was…”
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5-Arylmethylidene-2-iminothiazolidin-4-ones in the synthesis of novel dispiro-fused oxindolepyrrolidineiminothiazolidinones by Izmest’ev, Alexei N., Streltsov, Andrey A., Kravchenko, Angelina N., Gazieva, Galina A.

“…A novel series of dispiro(indolinonepyrrolidineiminothiazolidinones) were synthesized by 1,3-dipolar cycloaddition of…”
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The Chemo- and Regioselectivity of the Cyclization of Thiosemicarbazides with Haloacetic Acids and their Derivatives by Izmest’ev, Alexei N., Streltsov, Andrey А., Kravchenko, Angelina N., Gazieva, Galina А.

“…The effect of the structural features of the starting thiosemicarbazides as well as the cyclization reaction conditions on the chemo- and regioselectivity of…”
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The influence of substituents on the reactivity and cytotoxicity of imidazothiazolotriazinones by Gazieva, Galina A., Izmest’ev, Alexei N., Anikina, Lada V., Pukhov, Sergey A., Meshchaneva, Marina E., Khakimov, Dmitry V., Kolotyrkina, Natalya G., Kravchenko, Angelina N.

“…A series of tetrahydroimidazo[4,5- e ]thiazolo[3,2- b ]-1,2,4-triazine-2,7(1 H , 6 H )-diones were synthesized via the reaction of imidazotriazinethiones and…”
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An effective one-pot access to polynuclear dispiroheterocyclic structures comprising pyrrolidinyloxindole and imidazothiazolotriazine moieties via a 1,3-dipolar cycloaddition strategy by Izmest'ev, Alexei N, Gazieva, Galina A, Sigay, Natalya V, Serkov, Sergei A, Karnoukhova, Valentina A, Kachala, Vadim V, Shashkov, Alexander S, Zanin, Igor E, Kravchenko, Angelina N, Makhova, Nina N

“…An effective and highly regio- and diastereoselective one-pot method for the synthesis of new polynuclear dispiroheterocyclic systems with five stereogenic…”
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Synthesis of 7-oxindolylidene-3a,9a-diphenylimidazothiazolo[2,3-c][1,2,4]triazines by skeletal rearrangement of their [3,2-b]-fused isomers by Izmest'ev, Alexei N., Kravchenko, Angelina N., Gazieva, Galina A.

“…[Display omitted] Previously unavailable 7-oxindolylidene-1,3-dimethyl-3a,9adiphenylimidazo[4,5-e]thiazolo[2,3-c][1,2,4]triazines were obtained in 63–90%…”
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Regioselective Synthesis of Imidazo[4,5‐ e ][1,3]Thiazino[3,2‐ b ][1,2,4]Triazines as New Heterocyclic System Derivatives by Izmest'ev, Alexei N., Baranov, Vladimir V., Kolotyrkina, Natalya G., Kravchenko, Angelina N., Gazieva, Galina A.

“…ABSTRACT A series of new 4a,7a‐diarylperhydroimidazo[4,5‐ e ][1,2,4]triazine‐3‐thiones were synthesized from 4,5‐diaryl‐4,5‐dihydroxyimidazolidin‐2‐ones and…”
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Regioselective synthesis of new imidazo[4,5‐e][1,3]thiazino[2,3‐c][1,2,4]triazines via reaction of imidazo[4,5‐e][1,2,4]triazinethiones with ethyl phenylpropiolate by Vinogradov, Dmitry B., Izmest'ev, Alexei N., Kravchenko, Angelina N., Kolotyrkina, Natalya G., Gazieva, Galina A.

“…A method for the regioselective synthesis of imidazo[4,5‐e][1,3]thiazino[2,3‐c][1,2,4]triazine derivatives has been developed by the reaction of…”
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Regioselective synthesis of new imidazothiazinotriazines via reaction of imidazotriazinethiones with ethyl phenylpropiolate by Vinogradov, Dmitry B, Izmest'ev, Alexei N, Kravchenko, Angelina N, Kolotyrkina, Natalya G, Gazieva, Galina A

“…A method for the regioselective synthesis of imidazo[4,5‐e][1,3]thiazino[2,3‐c][1,2,4]triazine derivatives has been developed by the reaction of…”
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