Search Results - "Shavrin, Konstantin N."

Infrared-Spectroscopic Study of (4-Methylpent-3-en-1-ynyl)methylthiocarbene, Its Photochemical Transformations, and Reactions in an Argon Matrix by Baskir, Esfir G, Gvozdev, Valentin D, Shavrin, Konstantin N, Egorov, Mikhail P, Nefedov, Oleg M

“…The first representative of singlet carbenes bearing both ethynyl and methylthio groups at the carbene center, (4-methylpent-3-en-1-ynyl)­methylthiocarbene,…”
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Synthesis of 6-(arylmethylidene)octahydropyrrolo[1,2-a]pyrimidines and 5-(arylmethylidene)hexahydropyrrolo[1,2-a]imidazoles by the interaction of alk-4-ynals with a,?-diaminoalkanes in DMSO in the presence of KOH by Shavrin, Konstantin N., Gvozdev, Valentin D., Nefedov, Oleg M.

“…Cyclization of alk-4-ynals with a,?-diaminoalkanes in DMSO under the action of KOH affords bicyclic N,N-enaminals – 6-(aryl-…”
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Selective Reduction and Dehydrogenation of 6-Benzylideneoctahydropyrrolo[1,2-a]Pyrimidines and 5-Benzylidenehexahydropyrrolo[1,2-a]Imidazoles as New Approaches to N-(ω-Aminoalkyl)Pyrrolidines and Bicyclic Amidines by Shavrin, Konstantin N., Gvozdev, Valentin D., Nefedov, Oleg M.

“…Sodium borohydride reduction of 6-benzylideneoctahydropyrrolo[1,2-a]pyrimidines and 5-benzylidenehexahydropyrrolo[1,2-a]imidazoles affords…”
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A Highly Delocalized Triplet Carbene, 5-Methylhexa-1,2,4-triene-1,3-diyl: Matrix IR Identification, Structure, and Reactions by Boganov, Sergey E, Faustov, Valery I, Shavrin, Konstantin N, Gvozdev, Valentin D, Promyslov, Vladimir M, Egorov, Mikhail P, Nefedov, Oleg M

“…The first representative of highly delocalized triplet carbenes bearing both vinyl and ethynyl groups at the formal carbene center,…”
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Synthesis of vicinal (alkylamino)alkynylcyclopropanes from geminal alkynyl(chloro)cyclopropanes by Gvozdev, Valentin D., Shavrin, Konstantin N., Egorov, Mikhail P., Nefedov, Oleg M.

“…[Display omitted] New N-Boc-alkyl(2-alkynylcyclopropyl)amines were synthesized from 1-alkynyl-1-chlorocyclopropanes and N-Boc- alkylamines under the action of…”
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Alkylthio(4-methylpent-3-en-1-ynyl)carbenes: generation by the photolysis of 5-alkylthioethynyl-3,3-dimethyl-3H-pyrazoles and reactions with alkenes by Gvozdev, Valentin D., Shavrin, Konstantin N., Baskir, Esfir G., Nefedov, Oleg M., Egorov, Mikhail P.

“…[Display omitted] New singlet alkylthio(4-methylpent-3-en-1-ynyl)carbenes were generated by photolysis of corresponding…”
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Selective one-pot synthesis of 11-arylmethylidene-11H-isoindolo-[2,1-a]benzimidazoles and 6-arylbenzimidazo[2,1-a]isoquinolines from o-alkynylbenzaldehydes and o-diaminobenzenes by Gvozdev, Valentin D., Shavrin, Konstantin N., Baskir, Esfir G., Egorov, Mikhail P., Nefedov, Oleg M.

“…[Display omitted] Cyclization of o-alkynylbenzaldehydes with o-diaminobenzenes in DMSO under the sequential action of NH4Br and K2CO3 affords…”
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Carbenes, related intermediates, and small-sized cycles: contribution from Professor Nefedov’s laboratory by Tomilov, Yury V., Menchikov, Leonid G., Shapiro, Evgeny A., Gvozdev, Valentin D., Shavrin, Konstantin N., Volchkov, Nikolay V., Lipkind, Maria B., Egorov, Mikhail P., Boganov, Sergey E., Khabashesku, Valery N., Baskir, Esfir G.

“…[Display omitted] The review summarizes some of the most prominent results obtained in the laboratory headed by Academician Oleg M. Nefedov at the N. D…”
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New selective cyclizations of alk-4-ynals with primary amines and azoles:one-pot synthesis of 2-azolylpyrrolidines and 3-iminocyclopentenes by Gvozdev, Valentin D., Shavrin, Konstantin N., Egorov, Mikhail P., Nefedov, Oleg M.

“…[Display omitted] One-pot cyclization of alk-4-ynals with primary aliphatic amines and azoles in DMSO under the action of KOH affords…”
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Selective one-pot synthesis of 11-arylmethylidene-11 H -isoindolo-[2,1- a ]benzimidazoles and 6-arylbenzimidazo[2,1- a ]isoquinolines from o -alkynylbenzaldehydes and o -diaminobenzenes by Gvozdev, Valentin D., Shavrin, Konstantin N., Baskir, Esfir G., Egorov, Mikhail P., Nefedov, Oleg M.

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Stereoselective one-pot synthesis of (1Z)- and (1E)-1-arylmethylidene-2,3-dihydro-1H-pyrrolo[1,2-a]benzimidazoles by cyclization of alk-4-ynals with o-diaminobenzene by Gvozdev, Valentin D., Shavrin, Konstantin N., Egorov, Mikhail P., Nefedov, Oleg M.

“…[Display omitted] Cyclization of alk-4-ynals with o-diaminobenzene in DMSO under the sequential action of NH4Br and base (KOH or K2CO3) affords…”
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One-pot synthesis of 1-arylmethylidene-1,2,3,3a-tetrahydro-5H-pyrrolo[1,2-a]-[3,1]benzoxazines and 1-arylmethylidene-1,2,3,3a,4,5-hexahydropyrrolo[1,2-a]-quinazolines from 5-arylalk-4-ynals and o-aminobenzylic alcohol/amine by Gvozdev, Valentin D., Shavrin, Konstantin N., Egorov, Mikhail P., Nefedov, Oleg M.

“…Cyclization of 5-arylalk-4-ynals with o-aminobenzylamine or o-aminobenzyl alcohol in DMSO under the sequential action of NH4Br and KOH affords…”
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5-Methylenehexahydropyrrolo[1,2-a]imidazoles and 6-methyleneoctahydropyrrolo[1,2-a]pyrimidines in the reactions of 1-(alk-1-ynyl)-1-chlorocyclopropanes with lithium derivatives of 1,2- and 1,3-diaminoalkanes by Shavrin, Konstantin N., Gvozdev, Valentin D., Nefedov, Oleg M.

“…Unusual reactions of 1-(alk-1-ynyl)-1-chlorocyclopropanes with lithium derivatives of 1,2-diaminoethane, 1,3-diaminopropane and 1-methylamino-3-aminopropane in…”
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Unusual reactions of 1-(alk-1-ynyl)-1-chlorocyclopropanes with lithium monoalkylamides by Shavrin, Konstantin N., Gvozdev, Valentin D., Yurov, Serafim V., Nefedov, Oleg M.

“…Depending on the substituent at the triple bond, the reaction of 1-(alk-1-ynyl)-1-chlorocyclopropanes 1 with lithium monoalkylamides in THF gives hitherto…”
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1-(Alk-1-ynyl)cyclopropenes: synthesis by interaction of 1-(alk-1-ynyl)-1-halocyclopropanes with lithium N,N-dialkylamides and subsequent additions of the latter by Shavrin, Konstantin N., Gvozdev, Valentin D., Budanov, Dmitry V., Yurov, Serafim V., Nefedov, Oleg M.

“…A new synthetic approach to 1-(alk-1-ynyl)cyclopropenes 2 by the reaction of 1-(alk-1-ynyl)-1-chlorocyclopropanes 1 with lithium N,N-dialkylamides has been…”
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Generation of previously unknown (alk-1-ynyl)organylthiocarbenes by the γ-elimination of HCl from 1-substituted 3-organyl-1-chloropropadienes under the action of bases by Shavrin, Konstantin N., Gvozdev, Valentin D., Nefedov, Oleg M.

“…Previously unknown (alk-1-ynyl)organylthiocarbenes were generated from 1-substituted 1-chloro-3-organylthiopropadienes 1 as a result of HCl elimination under…”
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Alk-1-ynyl(3-pyridyl)- and alk-1-ynyl(2-thienyl)carbenes as the first example of (alk-1-ynyl)carbenes with hetaryl substituents at carbenic centres by Shavrin, Konstantin N., Gvozdev, Valentin D., Nefedov, Oleg M.

“…Alk-1-ynyl(hetaryl)carbenes 3 have been generated from 1-(tosyloxy)-1-hetarylalk-2-ynes 2 via the elimination of para-toluenesulfonic acid on the treatment…”
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A new general method for the generation of (alk-1-ynyl)halocarbenes by base solvolysis of 3-substituted 1,1,1,3-tetrahalopropanes by Shavrin, Konstantin N., Gvozdev, Valentin D., Nefedov, Oleg M.

“…The (alk-1-ynyl)halocarbenes 4 have been generated from 3-substituted 1,1,1,3-tetrahalopropanes 1 via elimination of three molecules of hydrogen halide by…”
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Synthesis of (alk-1-ynyl)cyclopropenium salts via the reaction of (alk-1-ynyl)chlorocarbenes with diphenylacetylene by Shavrin, Konstantin N., Gvozdev, Valentin D., Nefedov, Oleg M.

“…1-(Alk-1-ynyl)-2,3-diphenylcyclopropenium perchlorates 7 have been prepared via the generation of (alk-1-ynyl)chlorocarbenes 3 from 1,1-dichloroalk-2-ynes 1 or…”
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A new, general route to 1-chloro-1-ethynylcyclopropanes via chloro(trimethylsilylethynyl)carbene by Shavrin, Konstantin N., Krylova, Irina V., Shvedova, Inna B., Nefedov, Oleg M.

“…A new, general route to 1-chloro-1-ethynylcyclopropanes 6 has been developed via cycloaddition of previously unknown chloro(trimethylsilylethynyl)carbene 4b to…”
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