Search Results - "Shemyakina, Olesya A"

Cs2CO3-Promoted reaction of tertiary bromopropargylic alcohols and phenols in DMF: a novel approach to α-phenoxyketones by Volostnykh, Ol'ga G, Shemyakina, Olesya A, Stepanov, Anton V, Ushakov, Igor' A

“…The reaction of bromopropargylic alcohols with phenols in the presence of Cs 2 CO 3 /DMF affords α-phenoxy-α’-hydroxyketones (1:1 adducts) and…”
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Expedient Access to Functionalized Furan/3(2H)-furanone Ensembles via Microwave-Assisted Domino Reactions by Trofimov, Boris A., Stepanov, Anton V., Mal'kina, Anastasiya G., Volostnykh, Ol'ga G., Shemyakina, Olesya A., Ushakov, Igor' A.

“…A one-pot linkage between furan and 3(2H)-furanone rings has been effected via the microwave-assisted Et 3 N-catalyzed domino condensation of the furan and…”
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Synthesis of α‐Acyloxy‐α′‐hydroxy Ketones via Cyclic Carbonate Intermediates Generated from Tertiary Bromopropargylic Alcohols and Cs2CO3 by Shemyakina, Olesya A., Volostnykh, Ol'ga G., Stepanov, Anton V., Ushakov, Igor' A.

“…A facile approach towards α‐acyloxy‐α′‐hydroxy ketones by reaction of readily available tertiary bromopropargylic alcohols and carboxylic acids in system…”
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Organic Superbases in Annulation with Propargylic Alcohols: Straightforward Synthesis of the Functionalized Oxazolopyrrolohexahydropyrimidine and Oxazolohexahydropyrimidoazepine Scaffolds by Trofimov, Boris A., Shemyakina, Olesya A., Mal'kina, Anastasiya G., Stepanov, Anton V., Volostnykh, Ol'ga G., Ushakov, Igor' A., Vashchenko, Alexander V.

“…The popular organic superbases 1,5‐diazabicyclo[4.3.0]non‐5‐ene (DBN) and 1,8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU) underwent annulation with electron‐deficient…”
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A Domino Reaction of α,β-Acetylenic γ-Hydroxy Nitriles with Arenecarboxylic Acids: An Unexpected Facile Shortcut to 4-Cyano-3(2H)-furanones by Trofimov, Boris A, Shemyakina, Olesya A, Mal’kina, Anastasiya G, Ushakov, Igor’ A, Kazheva, Olga N, Alexandrov, Grigorii G, Dyachenko, Oleg A

“…An unexpected facile domino reaction of α,β-acetylenic γ-hydroxy nitriles with arenecarboxylic acids (Et3N, MeCN, 20−25 °C, 48 h) affords…”
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Metal-free addition of aliphatic carboxylic acids to cyanopropargyl alcohols: an access to new families of functionalized dihydrofurans and 3(2H)-furanones by Shemyakina, Olesya A., Volostnykh, Olga G., Stepanov, Anton V., Ushakov, Igor A., Malkina, Anastasiya G., Apartsin, Konstantin A., Kireeva, Viktoria V., Trofimov, Boris A.

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hemo- and regioselective modification of adenosine with tertiary cyanopropargylic alcohols by Trofimov, Boris A, Nosyreva, Valentina V, Shemyakina, Olesya A, Mal'kina, Anastasiya G, Albanov, Alexander I

“…Adenosine reacts with tertiary cyanopropargylic alcohols under mild conditions (K2CO3, DMF, 20-25 degree C, 4-30 h) with 100% chemo- and regioselectivity by…”
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Tandem regio- and stereospecific cyclization of ethyl isonicotinate with cyanoacetylenic alcohols to provide novel polycondensed heterocyclic systems by Trofimov, Boris A., Mal’kina, Anastasiya G., Nosyreva, Valentina V., Shemyakina, Olesya A., Albanov, Alexander I., Afonin, Andrei V., Kazheva, Olga N., Alexandrov, Grigorii G., Dyachenko, Oleg A.

“…Ethyl isonicotinate reacts with tertiary cyanoacetylenic alcohols under exceptionally mild conditions (room temperature, without catalyst or solvent) to afford…”
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Peculiarities of the tandem reaction between cyanoacetylenic alcohols and aminobenzoic acids: Synthesis of 5,5-dialkyl-2-(3-aminophenyl)-4-oxo-4,5-dihydrofuran-3-carbonitriles by Shemyakina, Olesya A., Mal’kina, Anastasiya G., Nosyreva, Valentina V., Ushakov, Igor’ A., Trofimov, Boris A.

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Chemo-, regio- and stereospecific addition of adenine and 8-azaadenine to α,β-acetylenic γ-hydroxy nitriles: a short-cut to novel acyclic adenosine analogues by Trofimov, Boris A., Mal'kina, Anastasiya G., Nosyreva, Valentina V., Shemyakina, Olesya A., Borisova, Angela P., Larina, Lyudmila I., Kazheva, Olga N., Alexandrov, Grigorii G., Dyachenko, Oleg A.

“…Adenine (9 H-purin-6-amine) adds readily to available α,β-acetylenic γ-hydroxy nitriles under mild conditions (molar ratio 1:1, K 2CO 3, DMF, rt, 10 min) to…”
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Chemo- and regioselective modification of D,L-phenylalanine with α-cyanoacetylenic alcohols in water by Mal’kina, Anastasiya G., Borisova, Angela P., Nosyreva, Valentina V., Shemyakina, Olesya A., Albanov, Alexander I., Trofimov, Boris A.

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Stereochemical study of iminodihydrofurans based on experimental measurements and SOPPA calculations of 13C13C spin-spin coupling constants by Krivdin, Leonid B., Khutsishvili, Spartak S., Shemyakina, Olesya A., Mal'kina, Anastasiya G., Trofimov, Boris A., Contreras, Rubén H.

“…Configurational assignment and conformational analysis of a series of iminodihydrofurans obtained from cyanoacetylenic alcohols were performed on the basis of…”
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Synthesis of α‐Acyloxy‐α′‐hydroxy Ketones via Cyclic Carbonate Intermediates Generated from Tertiary Bromopropargylic Alcohols and Cs 2 CO 3 by Shemyakina, Olesya A., Volostnykh, Ol'ga G., Stepanov, Anton V., Ushakov, Igor' A.

“…A facile approach towards α‐acyloxy‐α′‐hydroxy ketones by reaction of readily available tertiary bromopropargylic alcohols and carboxylic acids in system Cs 2…”
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Cs 2 CO 3 -Promoted reaction of tertiary bromopropargylic alcohols and phenols in DMF: a novel approach to α-phenoxyketones by Volostnykh, Ol'ga G, Shemyakina, Olesya A, Stepanov, Anton V, Ushakov, Igor' A

“…The reaction of bromopropargylic alcohols with phenols in the presence of Cs CO /DMF affords α-phenoxy-α'-hydroxyketones (1:1 adducts) and α,α-diphenoxyketones…”
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Cs2CO3-Promoted reaction of tertiary bromopropargylic alcohols and phenols in DMF: a novel approach to α-phenoxyketones by Volostnykh, Ol'ga G, Shemyakina, Olesya A, Stepanov, Anton V, Ushakov, Igor' A

“…The reaction of bromopropargylic alcohols with phenols in the presence of CS2CO3/DMF affords a-phenoxy-a'-hydroxyketones (1:1 adducts) and a.a-diphenoxyketones…”
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Catalyst-free three-component synthesis of hydroxyalkyltriazolylmethylidene barbiturates by Demina, Maria M., Medvedeva, Alevtina S., Vu, Tran D., Larina, Lyudmila I., Mitroshina, Inessa V., Shemyakina, Olesya A.

“…[Display omitted] 5-[(5-Hydroxyalkyl-1H-1,2,3-triazol-4-yl)methylidene]barbiturates were eco-friendly synthesized in up to 89% yields by one-pot…”
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One-pot tandem synthesis of fluorescent 5-naphthyl-3(2H)-furanones by Mal'kina, Anastasiya G., Volostnykh, Ol'ga G., Petrushenko, Konstantin B., Shemyakina, Olesya A., Nosyreva, Valentina V., Ushakov, Igor' A., Trofimov, Boris A.

“…Fluorescent 3(2H)-furanones, 4-cyano-2,2-dialkyl-5-(1- or 2-)naphthyl-3(2H)-furanones, have been synthesized in 69–81% yield by a one-pot procedure, via the…”
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DBU as a scaffold for the synthesis of [1,3]oxazolo[2’,3’ : 2,3]pyrimido-[1,2-a]azepines: annulation with aromatic cyanopropargylic alcohols by Shemyakina, Olesya A., Volostnykh, Ol’ga G., Stepanov, Anton V., Mal’kina, Anastasiya G., Ushakov, Igor A., Apartsin, Konstantin A., Kireeva, Victoriya V., Trofimov, Boris A.

“…[Display omitted] Organic superbase DBU, 1,8-diazabicyclo[5.4.0]undec-7-ene, readily annulated with aromatic cyanopropargylic alcohols nder mild conditions…”
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Сhemo- and regioselective modification of adenosine with tertiary cyanopropargylic alcohols by Trofimov, Boris A., Nosyreva, Valentina V., Shemyakina, Olesya A., Mal’kina, Anastasiya G., Albanov, Alexander I.

“…Adenosine reacts with tertiary cyanopropargylic alcohols under mild conditions (K2CO3, DMF, 20–25°C, 4–30h) with 100% chemo- and regioselectivity by the way of…”
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Regio- and stereoselective modification of cytosine with cyanopropargylic alcohols by Mal’kina, Anastasiya G., Nosyreva, Valentina V., Shemyakina, Olesya A., Albanov, Alexander I., Trofimov, Boris A.

“…[Display omitted] Cyanopropargylic alcohols (4-hydroxyalk-2-ynenitriles) add cytosine at the triple bond under mild conditions (3–5 mol% K2CO3, DMF, 20–25°C,…”
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