Relevant bibliographies by topics / 3-Oxo-α

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Academic literature on the topic '3-Oxo-α'

Author: Grafiati
Published: 4 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "3-Oxo-α"

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Cvak, Ladislav, Josef Stuchlík, Magdalena Schreiberová, Petr Sedmera та Miroslav Flieger. "Side Reactions in Bromination of α-Ergocryptine". Collection of Czechoslovak Chemical Communications 57, № 3 (1992): 565–72. http://dx.doi.org/10.1135/cccc19920565.

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2,3-Dihydro-2-oxo-α-ergocryptine (III) and 2,3-dihydro-2-oxo-3-hydroxy-α-ergocryptine (IV) were found as the side reaction products in bromination of α-ergocryptine (I) with bromine in the presence of water. 2,3-Dihydro-2-oxo-3-ethoxy-α-ergocryptine (V) was formed in the presence of ethanol.
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Hegab, Mohamed I., Abd El-Galil A. Amr та Farouk M. E. Abdel-Megeid. "[4 + 2]-Cycloaddition Reactions Involving α-Oxo Thioketone Intermediates". Zeitschrift für Naturforschung B 57, № 8 (2002): 922–27. http://dx.doi.org/10.1515/znb-2002-0813.

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α-Chloro β-oxo sulfenyl chlorides 2 were reduced by iodide ions to the corresponding α-oxo thioketones 3 which dimerized in situ in a hetero-[4 + 2] cycloaddition to give the 1,3,4- oxadithiin derivatives 4. The α-oxo thioketones 3, in situ, cyclized also with 2,3-dimethyl-1,3- butadiene to give the corresponding adducts 5 and only in case of the oxo thioketone intermediate 3d two products 4d and 5d were obtained. Also, The α-oxo thioketones 3a,c, underwent in situ, cycloaddition with furan to give the corresponding adducts 6a,c together with the corresponding thioketone dimers 4a,c. When this
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Xie, Haiping, Mingxiang Chen, Dingyong Wang, and Runlin Xu. "Three Novel Friedelane Triterpenes with Antimicrobial Activity from the Stems of Celastrus Monospermus." Journal of Chemical Research 37, no. 1 (2013): 14–18. http://dx.doi.org/10.3184/174751912x13543807337784.

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Three novel friedelane triterpenes, monospermonal, monospermonol and monospermondiol, along with six known friedelanes, 3-oxofriedelane, 3-oxofriedelan-28-al, 3,12-dioxofriedelane, 3-oxo-28-hydroxyfriedelane, 3-oxo-11 β-hydroxyfriedelane, 3-oxo-12 α-hydroxyfriedelane and an oleanane triterpenoid, 3 β-hydroxyolean-12-ene, were isolated from the stems of Celastrus monospermus Roxb. The structures of novel compounds, monospermonal, monospermonol and monospermondiol, were identified as 3,12-dioxofriedelan-28-al, 3,12-dioxo-28-hydroxyfriedelane and 3-oxo-12 α,28-dihydroxyfriedelane, respectively by
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Ferth, Roland, Andreas Baumann, Wolfgang Robien, and Brigitte Kopp. "Cardenolide aus Ornithogalum nutans (2 n = 28), 1. Mitteilung / Cardenolides from Ornithogalum nutans (2 n = 28), Part." Zeitschrift für Naturforschung B 47, no. 10 (1992): 1444–58. http://dx.doi.org/10.1515/znb-1992-1017.

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From leaves and bulbs of Ornithogalum nutans L. (2 n = 28), seventeen cardenolides were isolated by column chromatography, DCCC and TLC. The structure elucidation was performed by means of 1H NMR, 13C NMR, HH-Cosy, HC-Cosy and FAB-MS studies and identification of the sugar moieties by GLC after acid hydrolysis of the cardenolides. Sugar compounds were identified as digitoxose, 3-acetyl-digitoxose, 2-deoxy-allose, 6-deoxy-allose, rhamnose, xylose and apiose. Glycosides of 7β,15β, 16 α-trihydroxy-uzarigenin, 8β,16 α-dihy-droxy, 15-oxo-uzarigenin, 3 β, 11β-dihydroxy, 12-oxo, 18-nor-5 α-card-13-en
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Hegab, Mohamed I., and A. M. Moustafa. "Thermolysis of Some Spirobenzopyran-3’,2-[1,3,4]oxadithiino- [5,6-c]benzopyran-4’-ones in the Presence of Some Homodienes and Crystallographic Studies of Some Adducts." Zeitschrift für Naturforschung B 61, no. 11 (2006): 1413–20. http://dx.doi.org/10.1515/znb-2006-1115.

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The very reactive α-oxo-thioketone derivatives 2a - d, generated via thermolysis of spirobenzopyran- 3’,2-[1,3,4]oxadithiino[5,6-c]benzopyran-4’-ones 1a - d, reacted with 2,3-dimethyl-1,3-butadiene and 1,3-cyclohexadiene under [4+2]-cycloaddition to afford spirobenzopyran-3’,6-thiapyran-4’-one adducts 3a - d and spirobenzopyran-3’,3-thiabicyclo[2.2.2]oct-5-en-4’-one adducts 4a - d, respectively. On the other hand, the reaction of α-oxo-thioketones 2a - d with isoprene afforded regioselectively only 3-methyl-thiapyran derivatives 5a - d. Single crystal X-ray diffraction studies of 4b, 4c, and 5
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Barbosa, Antony P., Bernadete P. da Silva, and José P. Parente. "Brevifoliasaponin with Adjuvant Activity from Calliandra brevifolia." Zeitschrift für Naturforschung B 63, no. 7 (2008): 894–902. http://dx.doi.org/10.1515/znb-2008-0714.

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A new complex triterpenoid saponin, brevifoliasaponin, was isolated from leaves of Calliandra brevifolia Benth. (Leguminosae) by using chromatographic methods. Its structure was established as 3-[(O-α-L-arabinopyranosyl-(1 → 2)-O-α-L-arabinopyranosyl-(1 → 6)-2-(acetylamino)- 2-deoxy-β -D-glucopyranosyl)oxy]-16-hydroxy-(3β ,16α)-olean-12-en-28-oic acid O-β - D-xylopyranosyl-(1 → 3)-O-β -D-xylopyranosyl-(1→4)-O-[β -D-glucopyranosyl-(1 → 3)]-O-6-deoxy- α-L-mannopyranosyl-(1 → 2)-6-O-[(2E,6S)-6-[[2-O-[(2E,6S)-6-[[2-O-[(2E,6S)-2,6-dimethy- l1-oxo-6-(β -D-xylopyranosyloxy)-2,7-octadienyl]-β -D-xylop
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Pföstl, Andreas, Sonja Zayni, Andreas Hofinger, Paul Kosma, Christina Schäffer та Paul Messner. "Biosynthesis of dTDP-3-acetamido-3,6-dideoxy-α-D-glucose". Biochemical Journal 410, № 1 (2008): 187–94. http://dx.doi.org/10.1042/bj20071044.

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Derivatives of 3-amino-3,6-dideoxyhexoses are widespread in Nature. They are part of the repeating units of lipopolysaccharide O-antigens, of the glycan moiety of S-layer (bacterial cell surface layer) glycoproteins and also of many antibiotics. In the present study, we focused on the elucidation of the biosynthesis pathway of dTDP-α-D-Quip3NAc (dTDP-3-acetamido-3,6-dideoxy-α-D-glucose) from the Gram-positive, anaerobic, thermophilic organism Thermoanaerobacterium thermosaccharolyticum E207-71, which carries Quip3NAc in its S-layer glycan. The biosynthesis of dTDP-α-D-Quip3NAc involves five en
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Schütznerová, Eva, Adam Přibylka та Viktor Krchňák. "Nα-Amino acid containing privileged structures: design, synthesis and use in solid-phase peptide synthesis". Organic & Biomolecular Chemistry 16, № 29 (2018): 5359–62. http://dx.doi.org/10.1039/c8ob01485j.

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Fmoc-protected N<sup>α</sup>-amino acid containing heterocyclic privileged structures, O-(1-methyl-5-oxo-2,5-dihydro-1H-pyrrol-3-yl)-l-serine and O-((S)-5-oxo-2,3,5,7a-tetrahydro-1H-pyrrolizin-7-yl)-l-serine, were synthesized on the solid phase from simple commercially available building blocks under mild conditions.
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Suresh, C. G., K. Sakthivel та T. Pathak. "5'-O-Benzoyl-2',3'-dideoxy-2'-oxo-α-uridine". Acta Crystallographica Section C Crystal Structure Communications 52, № 7 (1996): 1776–79. http://dx.doi.org/10.1107/s0108270195017082.

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Dotsenko, Victor V., Nawras T. Jassim, Azamat Z. Temerdashev, Zainab R. Abdul-Hussein, Nicolai A. Aksenov, and Inna V. Aksenova. "New 6′-Amino-5′-cyano-2-oxo-1,2-dihydro-1′H-spiro[indole-3,4′-pyridine]-3′-carboxamides: Synthesis, Reactions, Molecular Docking Studies and Biological Activity." Molecules 28, no. 7 (2023): 3161. http://dx.doi.org/10.3390/molecules28073161.

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The purpose of this work was to prepare new isatin- and monothiomalondiamide-based indole derivatives, as well as to study the properties of the new compounds. The four-component reaction of 5-R-isatins (R = H, CH3), malononitrile, monothiomalonamide (3-amino-3-thioxo- propanamide) and triethylamine in hot EtOH yields a mixture of isomeric triethylammonium 6′-amino-3′-(aminocarbonyl)-5′-cyano-2-oxo-1,2-dihydro-1′H- and 6′-amino-3′-(aminocarbonyl)- 5′-cyano-2-oxo-1,2-dihydro-3′H-spiro[indole-3,4′-pyridine]-2′-thiolates. The reactivity and structure of the products was studied. We found that oxi
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Dissertations / Theses on the topic "3-Oxo-α"

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Slaghenaufi, Davide. "Contribution à la caractérisation des précurseurs d’arôme glycosylés du bois de chêne." Thesis, Bordeaux 2, 2012. http://www.theses.fr/2012BOR21987/document.

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La présence d’un métabolisme actif des bactéries lactiques dans le vin logé en fûts de chêne induit une augmentation de la concentration des composés volatils du bois. Ce phénomène a récemment été attribué à l'activité glycosidique des bactéries. Le glucoside précurseur d'un composé majeur de l’arôme boisé (whiskylactone) a déjà été identifié et quantifié dans le bois de chêne. Mais aucune donnée n'était disponible jusqu’à présent concernant l’identification formelle des précurseurs pour d’autres arômes du bois de chêne.Un premier travail a permis de montrer que les précurseurs monoglycosides
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Meghni, Abdelhamid. "Synthèse régio ou stéréosélective et étude structurale dans la série des α- et β-hydroxyesters fonctionnels". Rouen, 1990. http://www.theses.fr/1990ROUES040.

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Les méthodes de synthèse des 3-hydroxy-2,2-dichloro-2-chloro-2,3 époxy et 3-chloro-2-oxoakanoates d'alkyle ont été revues, réalisées et comparées. Une nouvelle méthode sélective de préparation de ces composés a été mise au point selon la technique du transfert de phase et étendue aux oxazolines fonctionnelles, homologues à fonction ester protégée des produits précédents. La préparation des β-dialkylamino et des β-hydroxy-α-oxo esters a été reprise, étudiée et étendue à quelques termes nouveaux, en particulier à l'aide de la réaction sélective des dialkylaminosilanes. La réduction de ces α-oxoe
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Amorin, Bruna. "Polimorfismo V89L do gene 5 α-redutase tipo II (SRD5A2) e a associação com o risco de câncer de próstata :". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/115564.

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Introdução: A pesquisa por marcadores genéticos de susceptibilidade a doenças geralmente focam um gene baseado nas propriedades e vias metabólicas de seus produtos protéicos, assim, genes envolvidos na biossíntese de andrógenos podem identificar possíveis alterações na carcinogênese prostática. Diferenças étnicas em polimorfismos apresentam um papel no metabolismo de hormônios e podem acometer diferentes raças no risco de desenvolver câncer de próstata. A 5 alfaredutase (SRD5A2) é a enzima responsável por catalisar irreversivelmente a conversão da testosterona no principal androgênio prostátic
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Book chapters on the topic "3-Oxo-α"

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Khalil, Youssef, Peter T. Clayton, and Philippa B. Mills. "α-Aminoadipic Semialdehyde and 6-Oxo-pipecolic Acid." In Laboratory Guide to the Methods in Biochemical Genetics. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-58819-8_26.

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Pardasani, R. T., and P. Pardasani. "Molar magnetic moment of μ-oxo-di(α–benzoinoximato-α–benzoiniminatotetrahydrofuranchromium(III)]." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 1. Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62478-4_143.

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Brahmachari, Goutam. "(+)-3-Oxo-α-ionol." In Total Synthesis of Bioactive Natural Products. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-08-102822-3.00045-6.

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Stadlbauer, W. "From 3-Methylpyrazoles and α-Oxo Ketenes." In Five-Membered Hetarenes with Two Nitrogen or Phosphorus Atoms. Georg Thieme Verlag KG, 2002. http://dx.doi.org/10.1055/sos-sd-012-00329.

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"h) Semioxocarbone: α) I-Hydroxy-3-oxo-cyclopropene." In Ene-X and Yne-X Compounds, edited by Heinz Kropf and Ernst Schaumann. Georg Thieme Verlag, 1993. http://dx.doi.org/10.1055/b-0035-117230.

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Parrain, J. L., and J. Thibonnet. "[3 + 2]-Cycloaddition Reactions from α-Oxo Dithioesters." In Ketones. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-026-00732.

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Balaban, T. S., and A. T. Balaban. "From α,β-Unsaturated Ketones and 1,3-Diketones, 3-Oxo Esters, or α-Acyloxy Ketones." In Six-Membered Hetarenes with One Chalcogen. Georg Thieme Verlag KG, 2003. http://dx.doi.org/10.1055/sos-sd-014-00028.

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Taber, Douglass F. "Enantioselective Synthesis of Alcohols and Amines: The Ichikawa Synthesis of (+)-Geranyllinaloisocyanide." In Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0034.

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Shuichi Nakamura of the Nagoya Institute of Technology reduced (Angew. Chem. Int. Ed. 2011, 50, 2249) the α-oxo ester 1 to 2 with high ee. Günter Helmchen of the Universität-Heidelberg optimized (J. Am. Chem. Soc. 2011, 133, 2072) the Ir*-catalyzed rearrangement of 3 to the allylic alcohol 4. D. Tyler McQuade of Florida State University effected (J. Am. Chem. Soc. 2011, 133, 2410) the enantioselective allylic substitution of 5 to give the secondary allyl boronate, which was then oxidized to 6. Kazuaki Kudo of the University of Tokyo developed (Org. Lett. 2011, 13, 3498) the tandem oxidation of
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Westbrook, J. A., and S. E. Schaus. "α-Oxo Acids by Acid Hydrolysis of 2-Hydroxymorpholin-3-ones." In Three Carbon-Heteroatom Bonds: Acid Halides; Carboxylic Acids and Acid Salts. Georg Thieme Verlag KG, 2007. http://dx.doi.org/10.1055/sos-sd-020-00313.

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Schantl, J. G. "Reaction of Dihydropyrrole-Substituted α-Oxo Esters and Acylhydrazines Followed by Intramolecular [3 + 2] Cycloaddition." In Heteroatom Analogues of Aldehydes and Ketones. Georg Thieme Verlag KG, 2004. http://dx.doi.org/10.1055/sos-sd-027-00655.

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