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Relevant bibliographies by topics / Carbanions

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Academic literature on the topic 'Carbanions'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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Journal articles on the topic "Carbanions"

1

Grossert, J. Stuart, Jeffrey Hoyle, T. Stanley Cameron, Stephen P. Roe та Beverly R. Vincent. "The structures of some sulphur-stabilized carbanions and stereoelectronic requirements for the formation of α-sulphonyl carbanions". Canadian Journal of Chemistry 65, № 6 (1987): 1407–15. http://dx.doi.org/10.1139/v87-238.

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Relatively few structure determinations of α-sulphonyl stabilized carbanions have been reported. The salient features of these are summarized and discussed in the light of the X-ray crystal structures of the potassium salt from bis(methylsulfonyl)-3-(2,6-dimethoxypyridyl)sulfonylmethane (5), the carbon acid bis(methylsulphonyl-4-(1,3-dimethoxyphenyl)sulphonylmethane (6), the triethylammonium salt of 2-methylsulphonyl-2-phenylthio-1-(3-pyridyl)-1-ethanone (7), the carbon acid 2-methyl-sulphonyl-2-phenylthio-1-phenylethanone (8), and its triethylammonium salt (9). Results of these structure dete

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2

Toman, Jaromír, Jaromír Mindl, Antonín Lyčka, Jiří Klicnar, Ivana Srovnalová, and Miloš Koníček. "Structure of Reaction Products of Some Substituted Quinoxaline N-Oxides with Carbanions." Collection of Czechoslovak Chemical Communications 59, no. 11 (1994): 2493–500. http://dx.doi.org/10.1135/cccc19942493.

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1,2,3-Triazolo[1,5-a]- (II) and 1,2,4-triazolo[4,3-a]quinoxaline 5-oxide (III) react with the carbanions of β-diketones and β-keto esters to give enaminones in the same way as their tetrazolo analogue. The difference in mechanism of reactions of these N-oxides with carbanions of 3-alkylpentane-2,4-dione and ethyl methyl acetoacetate giving aziridinopolyazoloquinoxalines and ethyl 2-(polyazoloquinoxalin-4-yl)propanoates, respectively, is discussed. It was shown that the reaction with carbanion including the aziridine ring closure proceeds with 3,4-dihydro-3-oxoquinoxaline-1-oxide as well.

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3

Fischer, Alfred, George N. Henderson, and S. Sankararaman. "Preparation of and addition of carbanions to 6-methyl-6-nitrocyclohexa-2,4-dienones." Canadian Journal of Chemistry 67, no. 7 (1989): 1244–46. http://dx.doi.org/10.1139/v89-189.

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Nitration of 2-methylphenols with nitric acid and trifluoroacetic anhydride in ether at −78 °C gives 6-methyl-6-nitrocyclo-hexa-2,4-dienones that can be isolated. Carbanions add to 5,6-dimethyl-6-nitrocyclohexa-2,4-dienone to give the 5-substituted 2,3-dimethyl-2-nitrocyclohex-3-enone anion, which, with additional carbanion, gives the 5-substituted 2,3-dimethylphenoxide anion by elimination of nitrous acid. Keywords: nitration, dienone, addition, carbanion, nucleophilic.

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4

Katritzky, Alan R., and Ming Qi. "Michael Additions of Benzotriazole-Stabilized Carbanions. A Review." Collection of Czechoslovak Chemical Communications 63, no. 5 (1998): 599–613. http://dx.doi.org/10.1135/cccc19980599.

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The 1,4-addition of benzotriazole-stabilized carbanions to Michael acceptors is reviewed. The selectivity between 1,4- and 1,2-addition depends significantly on the electronic effect of the carbanion (usually lithium is the counterion), the type of the Michael acceptor, and steric effects. Steric hindrance of the benzotriazolyl group probably enhances the regioselectivity. Normally, 1,4-additions to α,β-unsaturated ketone or ester are observed for carbanions stabilized by a benzotriazolyl group and an electron-withdrawing group (e.g. aryl, vinyl, carbonyl). For α,β-unsaturated aldehydes as Mic

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5

Kumagai, Yuta, Takashi Naoe, Keisuke Nishikawa, Kazuyuki Osaka, Toshio Morita, and Yasuharu Yoshimi. "Formation of Carbanions from Carboxylate Ions Bearing Electron-Withdrawing Groups via Photoinduced Decarboxylation: Addition of Generated Carbanions to Benzaldehyde." Australian Journal of Chemistry 68, no. 11 (2015): 1668. http://dx.doi.org/10.1071/ch15115.

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The photoinduced decarboxylation of carboxylate ions bearing electron-withdrawing groups using biphenyl and 1,4-dicyanonaphthalene leads to the efficient generation of carbanions under mild conditions. The efficiency of the carbanion generation is strongly dependent on the single-electron transfer from the photogenerated radical anion of the electron-acceptor to the radical. In particular, the cyanomethyl anion formed using this photochemical method can be added to benzaldehydes to give the corresponding adducts.

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6

Zorin, А. V., A. T. Zaynasheva та V. V. Zorin. "Oxidative heterocoupling of lithium 2-methylpropanoate α-carbanion and secondary α-carbanions of lithium acylates". Журнал общей химии 94, № 4 (2024): 503–10. http://dx.doi.org/10.31857/s0044460x24040049.

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When the α-carbanion of 2-methylpropanoate (A) reacts with the α-carbanions of lithium butanoate, pentanoate, hexanoate, heptanoate and phenylacetate (B) in the presence of 1,2-dibromoethane, a mixture of oxidative homocoupling (A-A, B-B) products [2,2,3,3-tetramethyl- and 2,3-diethyl- (or 2,3-dipropyl-, 2,3-dibutyl-, 2,3-dipentyl-, 2,3-diphenyl)succinic acids] and heterocouplings (A-B) products [2,2-dimethyl-3-ethyl- (or 2,2-dimethyl-3-propyl-, 2,2-dimethyl-3-butyl-, 2,2-dimethyl-3 -pentyl-, 2,2-dimethyl-3-phenyl)succinic acids] is formed with a total yield of 84–98%. The effect of the nature

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7

Zorin, Alexander V., Aliya R. Chanysheva, Anastasia O. Lenkova та Vladimir V. Zorin. "INTERACTION OF α-CARBANIONS OF LITHIUM ACYLATES WITH 1,2-DIBROMOALKANES". IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, № 4 (2020): 12–16. http://dx.doi.org/10.6060/ivkkt.20206304.6150.

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We have studied the interaction of α-carbanions of lithium acylates with 1,2-dibromoalkanes with different length of the carbon chain in order to establish the direction of the reaction. Interaction of α-carbanions of lithium acylates obtained by metallation of acetic, butyric and isobutyric acids with lithium diisopropylamide and 1,2-dibromoalkanes (1,2-dibromohexane, 1,2-dibromoheptane or 1,2-dibromononane) with a molar ratio of reactants equal to 1: 2: 1 in argon atmosphere in tetrahydrofuran under normal conditions (20-25 °C) for 2 h leads to the products of the oxidative coupling of enola

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8

Han, Ling-Li, and Tao Liu. "Theoretical study on the nucleophilic fluoroalkylation of propylene oxide with fluorinated sulfones." Journal of the Serbian Chemical Society 78, no. 4 (2013): 483–94. http://dx.doi.org/10.2298/jsc120831097h.

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The path of nucleophilic fluoroalkylation reaction of propylene oxide with PhSO2CYF- (Y=F,H, and PhSO2, respectively) in gas phase and in Et2O solvent were studied theoretically. The nucleophilic fluoroalkylation of propylene oxide with fluorinated carbanions was probed by the reactivity comparison between (benzenesulfonyl)monofluoromethyl anion (PhSO2CHF-), (benzenesulfonyl) difluoromethyl anion (PhSO2CF2-), and bis(benzenesul-fonyl) monofluoromethyl anion ((PhSO2)2CF-). The nucleophilicity reactivity order of PhSO2CYF- (Y = F, H, and PhSO2) is [(PhSO2)2CF-] > PhSO2CHF- > PhSO2CF2-, whi

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9

Menn, Jean-Christophe Le, Jean Sarrazin, and André Tallec. "Carbanions phosphonate préparés par voie électrochimique: formation et réactivité vis-à-vis d'un aldéhyde." Canadian Journal of Chemistry 67, no. 8 (1989): 1332–43. http://dx.doi.org/10.1139/v89-205.

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Reactivity towards p-methoxybenzaldehyde (ArCHO) of electrochemically generated phosphonate carbanions has been investigated. Electrolyses were carried out at a mercury cathode in DMF and two routes to the desired carbanion have been compared: (i) Deprotonation of phosphonates of general formula (EtO)2P(O)CHYW (Y = W = Cl; Y = H, W = Cl; Y = Cl, W = CO2Et; Y = H, W = CO2Et; Y = CH3, W = CO2Et; Y = Cl, W = CH3), by the bases resulting from the electroreduction of azobenzene; addition of the carbanion formed onto the carbonyl group takes place and leads to the adduct (EtO)2P(O)CYW(Ar)O−. (ii) Tw

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10

Asghar, Basim H. M., Michael R. Crampton та Chukwuemeka Isanbor. "Carbanion reactivity — σ-adduct formation and elimination in the reactions of the carbanion from bis(phenylsulfonyl)methane with 4-nitrobenzofurazan derivatives". Canadian Journal of Chemistry 86, № 3 (2008): 225–29. http://dx.doi.org/10.1139/v08-010.

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1H NMR studies in [2H6]-DMSO show that the carbanion 4 from bis(phenylsulfonyl)methane reacts with 4,6-dinitrobenzofuroxan to yield a σ-adduct that undergoes base-catalysed elimination to yield an alkene derivative. Rate constants, measured spectrophotometrically, are reported for the corresponding reactions in methanol of 4 with 4-nitrobenzofurazan and some derivatives that give adducts at the 5-position. The intrinsic rate constant, ko, for this process has a value of 1.5 ± 0.5. The 5-adducts undergo methoxide-catalysed elimination of phenylsulfinic acid to yield alkene derivatives and rate

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Dissertations / Theses on the topic "Carbanions"

1

Michel, Reent. "Ammonia stabilized Carbanions." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://hdl.handle.net/11858/00-1735-0000-002E-E321-1.

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2

Gray, William K. "Novel chemistry of fluorinated carbanions." Thesis, Durham University, 1996. http://etheses.dur.ac.uk/5440/.

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The research described within this thesis may be divided into four main subject areas: I. The amine fluoride TDAE(^2+)2F- (10) has been used as a useful soluble source of fluoride ion in both C-F and C-C bond forming reactions. Methods of synthesis of (10) are described. This work Jed to the observation that TDAE (8), and other amines, could be used as agents for the in situ generation of fluoride, by nucleophilic attack on fluoro-alkenes. Its use allows the effective isolation of the products of dimerisation, co-dimerisation and the perfluoroalkylation reactions for the first time. II. Synthe

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3

Muccioli, Adriano B. "The chemistry of episulphone carbanions." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307818.

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4

Teguiche, Mabrouk. "Reaction of arylazides with carbanions." Thesis, University of Salford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293797.

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5

Manage, Ajith Chandersiri. "Stereoselective conjugate additions of #alpha#-sulphinyl carbanions." Thesis, University of Salford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306005.

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6

Porter, Thomas Carl. "Studies in the chemistry of #omicron#-substituted aryl-azides." Thesis, University of Salford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308217.

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7

Mattalia, Jean-Marc. "Conception et réalisation d'horloges radicalaires à haute résolution temporelle : applications à la réactivité des carbanions en [alpha] de sulfones et à la réduction de fonctions nitriles." Aix-Marseille 3, 1992. http://www.theses.fr/1992AIX30025.

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Les horloges radicalaires, pieges intramoleculaires de radicaux, constituent des outils d'autant plus precieux dans l'etude des mecanismes reactionnels que le rearrangement mis en jeu est rapide et irreversible. La serie de calculs de mecanique moleculaire realises au cours de cette these a permis de degager, dans un premier temps, quels facteurs structuraux jouent un role sur la proximite des sites reactionnels des pieges de type norbornenique. Nous avons de ce fait synthetise un nouveau piege le 5-(exo)-cyano-5-(endo)-isopropylsulfonyl-2-norbene-7-spiro-1-cyclopentane. La cycloaddition qui c

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8

Simion, Cristian. "Anions 1-aza et 2-azaallyliques, modèles-clés dans l'élaboration de charpentes cycliques azotées à cinq, six et sept chainons." Lille 1, 1994. http://www.theses.fr/1994LIL10072.

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Le travail presente dans le memoire de these concerne l'etude de la reactivite d'anions 1-aza et 2-azaallyliques et leur implication dans l'edification de charpentes heterocycliques a cinq, six et sept chainons. Les reactions qui sont decrites s'appuient sur l'excellente nucleophilie de ces especes et sont associees aux proprietes reactionnelles des differents intermediaires intervenant dans les processus d'annelation: les o-ethyl thiocarboxylates (thioesters) pour leur aptitude a generer des anions sulfures transitoires, les pyridines alpha-halogenees pour la labilite de l'atome d'halogene da

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9

Filip, Sorin V. "Studies towards the stereoselective electrophilic amination of carbanions." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=966042026.

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10

Bugden, G. F. "Investigation into the reactions of boron stabilised carbanions." Thesis, Swansea University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636171.

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Section 1 of this Thesis contains a review of carbanion chemistry with particular emphasis on the reactions of boron-stabilised carbanions. Section 2 contains a review of oxirane chemistry and is followed by reports of the results of a study on the oxyalkylative opening of oxiranes to yield 1,3-diols using carbanions derived from B-alkyldimesitylboranes. Largely unsuccessful attempts to produce δ-lactols <i>via</i> the reaction of the allyldimesitylborane anion are discussed. Finally, Section 3 reports the results of a study on the synthetic applications of dimesitylboryl(phenylthio)methane. I

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Books on the topic "Carbanions"

1

Teguiche, Mabrouk. Reaction of Arylazides with carbanions. University of Salford, 1991.

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2

A, Sniekus Victor, ed. Advances in carbanion chemistry. JAI Press, 1992.

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3

Manage, Ajith Chandersiri. Stereoselective conjugate additions of a-sulphinyl carbanions. University of Salford, 1991.

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4

Hsieh, Henry L. Anionic polymerization: Principles and practical applications. Marcel Dekker, 1996.

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5

Walker, Andrew J. Conjugate additions of sulphoxide-stabilised carbanions: Scope and applications. University of Salford, 1991.

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6

International, Symposium on Recent Advances in Anionic Polymerization (1986 New York N. Y. ). Recent advances in anionic polymerization: Proceedings of the International Symposium on Recent Advances in Anionic Polymerization, held April 13-18, 1986, at the American Chemical Society Meeting in New York, New York, U.S.A. Elsevier, 1987.

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7

Ewen, Ian Mc. Direct observation of intramolecular hydrogen bonding of a hydroxy proton to indenide and fluorenide carbanions by NMR, IR and UV spectroscopy. Univ., 1989.

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8

Hollstein, Werner. Untersuchungen zur Struktur bei [Alpha]-Sulfinyl- und Sulfonyl-Carbanionen. A.S. Intemann und C.C. Intemann, 1988.

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9

Gernot, Boche, ed. Physical organic chemistry. Springer-Verlag, 1988.

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10

Bates, Robert B. Carbanion Chemistry. Springer, 2012.

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Book chapters on the topic "Carbanions"

1

Gronert, Scott. "Carbanions." In Reactive Intermediate Chemistry. John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471721492.ch3.

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2

Comasseto, João V., Alcindo A. Dos Santos, and Edison P. Wendler. "Selenium-Stabilized Carbanions." In Organoselenium Chemistry. Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527641949.ch4.

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Ponthieux, Sylvain, and Claude Paulmier. "Selenium-Stabilized Carbanions." In Organoselenium Chemistry. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/3-540-48171-0_5.

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Birsa, M. L. "Carbanions and Electrophilic Aliphatic Substitution." In Organic Reaction Mechanisms Series. John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9780470975800.ch9.

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5

Yamaguchi, Masahiko. "Conjugate Addition of Stabilized Carbanions." In Comprehensive Asymmetric Catalysis I–III. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-58571-5_6.

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Birsa, M. L. "Carbanions and Electrophilic Aliphatic Substitution." In Organic Reaction Mechanisms · 2008. John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9780470979525.ch9.

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Birsa, M. L. "Carbanions and Electrophilic Aliphatic Substitution." In Organic Reaction Mechanisms Series. John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781119972471.ch9.

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Birsa, M. L. "Carbanions and Electrophilic Aliphatic Substitution." In Organic Reaction Mechanisms Series. John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118560273.ch9.

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Knipe, A. C. "Carbanions and Electrophilic Aliphatic Substitution." In Organic Reaction Mechanisms 2001. John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470866748.ch9.

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Birsa, M. L. "Carbanions and Electrophilic Aliphatic Substitution." In Organic Reaction Mechanisms Series. John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781119941910.ch9.

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Conference papers on the topic "Carbanions"

1

MOTOYOSHIYA, J., and H. AOYAMA. "CHEMILUMINESCENCE INVOLVING THE PHOSPHORUS CHEMISTRY: PHOSPHA-1,2-DIOXETANES AS THE MOST LIKELY HIGH-ENERGY INTERMEDIATES IN AUTOXIDATION OF PHOSPHONATE CARBANION." In Proceedings of the 13th International Symposium. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812702203_0047.

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Suttie, W. J., A. Cheung, and M. G. Wood. "ENZYMOLOGY OF THE VITAMIN K-DEPENDENT CARBOXYLASE: CURRENT STATUS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643991.

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The vitamin K-dependent microsomal carboxylase converts glutamyl residues in precursor proteins to γ-carboxyglutamyl (Gla) residues in completed proteins. The enzyme activity is present in significant activities in most non-skeletal tissues but has been studied most extensively in rat and bovine liver. Early studies of the enzyme utilized bound precursors of vitamin K-dependent clotting factors as substrates for the enzyme and demonstrated that the enzyme requires the reduced form of vitamin K (vitamin KH2), O2, and CO2. Subsequent investigations have taken advantage of the observation that th

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Reports on the topic "Carbanions"

1

Velcheva, Evelina, Simeon Stoyanov, and Bistra Stamboliyska. A Theoretical Investigation on the Structure and Vibrational Spectra of Phenindione Carbanion. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, 2019. http://dx.doi.org/10.7546/crabs.2019.05.07.

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