Relevant bibliographies by topics / Hexa-acetyl derivative

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Academic literature on the topic 'Hexa-acetyl derivative'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Hexa-acetyl derivative"

1

Čapek, Karel, Tomáš Vydra, Mojmír Ranný, and Petr Sedmera. "Structures of hexa-O-acetylsucroses formed by deacetylation of sucrose octa-O-acetate." Collection of Czechoslovak Chemical Communications 50, no. 10 (1985): 2191–200. http://dx.doi.org/10.1135/cccc19852191.

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A fraction corresponding to hexa-O-acetylsucrose was isolated in 34% yield from the reaction mixture after deacetylation of sucrose octa-acetate by aluminium oxide impregnated by potassium carbonate. Its subsequent reaction with p-toluenesulfonyl chloride in pyridine provided crystalline 1',2,3,4,6,6'-hexa-O-acetyl-3',4'-di-O-p-toluenesulfonylsucrose (III). With triphenylphosphine-diethyl azodicarboxylate reagent, 2,3,4,6-tetra-O-acetyl-α-D-glucopyranosyl 1,6-di-O-acetyl-3,4-anhydro-β-D-lyxo-hexulofuranoside (VI) was obtained. Treatment of ditosyl derivative III with sodium methoxide followed
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2

Čapek, Karel, Tomáš Vydra, and Petr Sedmera. "Structure of penta-O-acetylsucroses formed by deacetylation of octa-O-acetylsucrose. Reaction of 2,3,4,6,6'-penta-O-acetylsucrose." Collection of Czechoslovak Chemical Communications 53, no. 6 (1988): 1317–31. http://dx.doi.org/10.1135/cccc19881317.

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Chromatographic separation of penta-O-acetylsucrose fraction from deacetylation of octa-O-acetylsucrose by treatment with aluminium oxide impregnated by potassium carbonate gave 1',3,4,6,6'-penta-O-acetylsucrose (XII), 1,2,3,4,6-penta-O-acetylsucrose (XIII), and the prevailing 2,3,4,6,6'-penta-O-acetylsucrose (XIV). Reaction of compound XIV with two equivalents of p-toluenesulfonyl chloride in pyridine produced besides the 1'-O-p-toluenesulfonyl derivative XXI and 1',3',4'-tri-O-tosyl derivative XXII also 1',3'-di-O-tosyl derivative XXIII and 1',4'-di-O-tosyl derivative XX. 1',2-anhydro-(3,4,6
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3

Čapek, Karel, Tomáš Vydra, Jindra Čapková, Mojmír Ranný, Markéta Bláhová, and Petr Sedmera. "Partially acetylated sucrose. Preparation of 3-O-acetylsucrose and 3,6'-di-O-acetylsucrose and the analysis of mixtures of O-acetyl derivatives of sucrose of various degrees of acetylation by thin-layer chromatography with flame-ionization detection." Collection of Czechoslovak Chemical Communications 50, no. 5 (1985): 1039–47. http://dx.doi.org/10.1135/cccc19851039.

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Partial deacetylation of 3,3',4',6'-tetra-O-acetyl-l',2 : 4,6-di-O-isopropylidene sucrose (V) with aluminum oxide impregnated with potassium carbonate gave a mixture of 3,6'-di-O-acetyl-l',2 : 4,6-di-O-isopropylidenesucrose (VI) and 3-O-acetyl-l',2 : 4,6-di-O-isopropylidenesucrose (VII). 3,6'-di-O-acetylsucrose (IX) and 3-O-acetylsucrose (X) were prepared on deacetalation of compounds VI and VII, respectively. The structure of compounds IX and X was proved by 13C NMR and mass spectra of their deuterioacetyl derivatives XI and XII. Using procedures described in literature 3,3',4',6'-tetra-O-ace
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4

Rivera-Sagredo, Alfonso, and Jesús Jiménez-Barbero. "The Solution Conformation of Lactal and ITS Hexa-O-Acetyl Derivative." Journal of Carbohydrate Chemistry 11, no. 7 (1992): 903–19. http://dx.doi.org/10.1080/07328309208018278.

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5

Hamada, Nagwa M. M., Sohila H. Mancy, and Mohamed A. El Sekily. "A Facile Synthesis, Spectroscopic Identification, and Antimicrobial Activities of Some New Heterocyclic Derivatives from D-erythro-2,3-hexodiuloso-1,4-lactone-2-(o-chlorophenyl hydrazone)-3-oxime." International Journal of Chemistry 16, no. 2 (2024): 62. http://dx.doi.org/10.5539/ijc.v16n2p62.

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A new series of different heterocyclic derivatives was prepared via a facile unimolecular condensation of D-iso ascorbic acid with o-chlorophenyl hydrazine to give D-erythro-2,3-hexodiulosono-1,4-lactone 2-( o-chlorophenyl hydrazine (2). Reactions of (2) with hydroxylamine gave the 2-( o-chlorophenyl hydrazone)-3-oxime (3). On boiling with boiling acetyl chloride, (3) gave 2-o-chlorophenyl-4-(2,3-di-O-acetyl-D-erythro-glyceryl-1-yl)-1,2,3-triazole-5-carboxylic acid-5,1́-lactone (4). In the treatment of (3) with benzoyl chloride in pyridine the same dehydrati
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6

Hamada, Nagwa M. M., Sohila H. Mancy, and Mohamed A. El Sekily. "A Facile Synthesis, Spectroscopic Identification, and Antimicrobial Activities of Some New Heterocyclic Derivatives from D-erythro-2,3-hexodiuloso-1,4-lactone-2-(o-chlorophenyl hydrazone)-3-oxime." International Journal of Chemistry 17, no. 2 (2025): 50. https://doi.org/10.5539/ijc.v17n2p50.

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A new series of different heterocyclic derivatives was prepared via a facile unimolecular condensation of D-iso ascorbic acid with o-chlorophenyl hydrazine to give D-erythro-2,3-hexodiulosono-1,4-lactone 2-( o-chlorophenyl hydrazine (2). Reactions of (2) with hydroxylamine gave the 2-( o-chlorophenyl hydrazone)-3-oxime (3). On boiling with boiling acetyl chloride, (3) gave 2-o-chlorophenyl-4-(2,3-di-O-acetyl-D-erythro-glyceryl-1-yl)-1,2,3-triazole-5-carboxylic acid-5,1́-lactone (4). In the treatment of (3) with benzoyl chloride in pyridine the same dehydrati
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7

Franklin, Kristyn, and Anthony J. Clarke. "Overexpression and Characterization of the Chromosomal Aminoglycoside 2′-N-Acetyltransferase ofProvidencia stuartii." Antimicrobial Agents and Chemotherapy 45, no. 8 (2001): 2238–44. http://dx.doi.org/10.1128/aac.45.8.2238-2244.2001.

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ABSTRACT The gene coding for aminoglycoside 2′-N-acetyltransferase Ia [AAC(2′)-Ia] fromProvidencia stuartii was amplified by PCR and cloned. The resulting construct, pACKF2, was transferred intoEscherichia coli for overexpression of AAC(2′)-Ia as a fusion protein with an N-terminal hexa-His tag. The fusion protein was isolated and purified by affinity chromatography on Ni2+-nitrilotriacetic acid agarose and gel permeation chromatography on Superdex 75. Comparison of the specific activity of this enzyme with that of its enterokinase-digested derivative lacking the His tag indicated that the pre
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8

Kohne, Bernd, Klaus Praefcke, and Jan Billard. "Uber die drei discotischen Mesophasen der scyllo-Inosithexaester / On the Three Discotic Mesophases of scyllo-Inositol Hexaesters." Zeitschrift für Naturforschung B 41, no. 8 (1986): 1036–44. http://dx.doi.org/10.1515/znb-1986-0819.

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AbstractThe mesophases of eleven homologous hexaesters ( 1b -1) of the naturally occurring scylloinositol (1a ) representing the first series of alicyclic saturated discogens are studied by calorimetry and optical microscopy. The three derivatives 1 b -d of this hexahydroxy cyclohexane with each six acetyl, propionyl or butyroyl side chains, respectively, exhibit a very organized discophase D1. The hexa-0-acetyl-scyllo-inositol (1b , range of mesophase: Δt = 4.8 °C!) is the discogen having the shortest identical ester groups as lateral functions so far reported for discotic liquid crystals. Th
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9

Čapek, Karel, Monika Vodrážková-Medonosová, Jitka Moravcová, and Petr Sedmera. "Partially acetylated sucrose. Structures of hepta-O-acetylsucroses formed by deacetylation of octa-O-acetylsucrose." Collection of Czechoslovak Chemical Communications 51, no. 7 (1986): 1476–86. http://dx.doi.org/10.1135/cccc19861476.

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Formation of hepta-O-acetylsucroses I, II, XI, and XII, having a free hydroxyl group on the fructose moiety, in deacetylation of octa-O-acetylsucrose on aluminum oxide impregnated by potassium carbonate was proved by preparative chromatography on silica gel and by liquid chromatography. Their structures were inferred from the 1H and 13C NMR spectra, from NMR and mass spectra of their mono-methanesulfonyl derivatives VI - IX, or using comparison with authentic samples. Methanolic solutions of hepta-O-acetylsucroses I and II, a mixture of hepta-O-acetylsucroses XI and XII, and octa-O-acetylsucro
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10

Masi, Freda, Clement, et al. "Phytotoxic Activity and Structure–Activity Relationships of Radicinin Derivatives against the Invasive Weed Buffelgrass (Cenchrus ciliaris)." Molecules 24, no. 15 (2019): 2793. http://dx.doi.org/10.3390/molecules24152793.

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Radicinin (1), is a fungal dihydropyranopyran-4,5-dione isolated together with some analogues, namely 3-epi-radicinin, radicinol, 3-epi-radicinol, and cochliotoxin (2–5), from the culture filtrates of the fungus Cochliobolus australiensis, a foliar pathogen of buffelgrass (Cenchrus ciliaris), an invasive weed in North America. Among the different metabolites 1 showed target-specific activity against the host plant and no toxicity on zebrafish embryos, promoting its potential use to develop a natural bioherbicide formulation to manage buffelgrass. These data and the peculiar structural feature
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