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Journal articles on the topic 'Acetyl derivatives'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Glišin, Đorđe, Ljiljana Jelenković, Nataša Pejković, et al. "D-glucurono-6,3-lactone as an interesting compound in the synthetic chemistry of carbohydrates related targets." Advanced Technologies 12, no. 1 (2023): 84–88. http://dx.doi.org/10.5937/savteh2301084g.

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Isopropylidene acetals and ketals are frequent protecting groups in the chemistry of carbohydrates, particularly in organic synthesis. The yield of these derivatives must be high. Besides already published syntheses, we report a new way of synthesizing these derivatives in high yields and efficient deprotection. Acetyl and benzoyl groups are frequent protecting groups, and their use in carbohydrate chemistry , particularly on the derivative of D-glucurono-6,3-lactone was shown. Reactions of 1,2,5-triO-acetyl-D-glucurono-6,3-lactone with BF3 and (CH3CH2)3SiH, LiBH4, respectively and I2, were al

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2

Hadzic, Pavle, Nada Vukojevic, Mirjana Popsavin, and Janos Canadi. "Nucleophilic opening of the 3,5-anhydro ring in 1,2-O-cyclohexylidene- -D-xylofuranose." Journal of the Serbian Chemical Society 66, no. 1 (2001): 1–8. http://dx.doi.org/10.2298/jsc0101001h.

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The reactivity of the oxetane ring in 3,5-anhydro-1,2-O-cyclohexylidene- -D-xylofuranose (1) was exemplified by its regiospecific nucleophilic opening. The action of concentrated hydrobromic or hydroiodic acid on 1 resulted in the exclusive formation of the 5-deoxy-5-halo derivatives, while the action of acetyl chloride or acetyl bromide yielded the corresponding 3-O-acetyl-5-deoxy-5-halo derivatives in 70 - 90 % yield. Under strongly acidic reaction conditions, the protection of the cyclohexylidene acetal function remained intact.

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3

Sastre, Juan A. López, José Molina Molina, Dolores Portal Olea, and Cristina Romero-Avila. "A new synthesis of 2,5-anhydro-D-mannose derivatives." Canadian Journal of Chemistry 66, no. 12 (1988): 2975–80. http://dx.doi.org/10.1139/v88-462.

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Penta-O-acetyl-D-glucose diethyl dithioacetal monoxide 3 was obtained by oxidation of penta-O-acetyl-D-glucose diethyl dithioacetal 2 with 3-chloroperbenzoic acid. By reaction of 3 with sodium methoxide in methanol and further acetylation, 3,4,6-tri-O-acetyl-2,5-anhydro-D-mannose-diethyl dithioacetal monoxide 8 and the reduction product 3,4,6-tri-O-acetyl-2,5-anhydro-1,1-bis(ethylthio)-1-deoxy-D-arabino-hex-1-enitol 4 were obtained. Reduction of 8 yielded the corresponding dithioacetal derivative 9, which was converted to 3,4,6-tri-O-acetyl-2,5-anhydro-D-mannose diethyl acetal 11.

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4

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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5

Kaválek, Jaromír, Josef Jirman, and Vojeslav Štěrba. "Kinetics and mechanism of rearrangement and methanolysis of acylphenylthioureas." Collection of Czechoslovak Chemical Communications 50, no. 3 (1985): 766–78. http://dx.doi.org/10.1135/cccc19850766.

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S-Acyl-1-phenylthioureas and their 3-methyl derivatives are rearranged to 1-acyl derivatives of thiourea in methanolic solution. The rearrangement of the 1-acyl-1-phenyl derivative to the thermodynamically more stable 3-acyl derivative is subject to specific base catalysis. The rearrangement of acetyl group is about 2 orders of magnitude slower than that of benzoyl group. 1-Acetyl-l-phenylthiourea undergoes base-catalyzed methanolysis (giving phenylthiourea and methyl acetate) instead of the rearrangement. The methanolysis rates of l-acyl-3-phenylthioureas and their N-methyl derivatives have b

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6

Patel, H. S., and H. D. Desai. "Synthesis of Some New Azetidinone Derivatives Containing Aryl Sulfonyloxy Group." E-Journal of Chemistry 1, no. 4 (2004): 194–98. http://dx.doi.org/10.1155/2004/258752.

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Some novel azetidinone derivatives containing aryl sulfonyloxy group have been prepared. The 4-sulfonyloxy aniline derivative (2) has been prepared by reaction of 4-nitro phenol (sodium salt) with N-acetyl sulfanilyl chloride (ASC) followed by hydrolysis by ethanolic HCl. This compound (2) undergoes facile condensation reaction with aromatic aldehydes to yield different Schiff’s bases (3a-h). Cyclocondensation of compounds (3a-h) with chloro acetyl chloride yields different 2-azetidinone derivatives (4a-h).

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7

Ibrahim, Hassan K., Sayed H. El-Tamany, Reda F. El-Shaarawy, and Ibrahim M. El-Deen. "Synthesis and investigation of mass spectra of some novel benzimidazole derivatives." Macedonian Journal of Chemistry and Chemical Engineering 27, no. 1 (2008): 65. http://dx.doi.org/10.20450/mjcce.2008.248.

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2-Substituted benzimidazoles (3) and (4a-c) were prepared via condensation of ethyl 2-thionyl-pyruvate (1) and hydrazidoyl derivatives (2a-c) with o-phenylene diamine in acetic acid. Acetylation of compound (4a) with acetic anhydride yielded the corresponding N-acetyl derivative (5). Treatment of compound 4b with hydrazine hydrate gave the corresponding hydrazino derivative (6). Reaction of 2-[(2-thionyl)acetyl)] benzimidazole (3) with hydrazine hydrate gave the pyrazolyl derivative (7) and hydrazino derivative (8). Alkylation of compound 3 with alkyl halide gave the corresponding 2,3-disubsti

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8

YOSHINARI, TOMOYA, TAKAHIRO OHNISHI, TOMOYUKI KADOTA, and YOSHIKO SUGITA-KONISHI. "Development of a Purification Method for Simultaneous Determination of Deoxynivalenol and Its Acetylated and Glycosylated Derivatives in Corn Grits and Corn Flour by Liquid Chromatography–Tandem Mass Spectrometry." Journal of Food Protection 75, no. 7 (2012): 1355–58. http://dx.doi.org/10.4315/0362-028x.jfp-11-555.

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We developed a purification method based on liquid chromatography–tandem mass spectrometry for the identification of deoxynivalenol (DON), its acetylated derivatives (3-acetyl-deoxynivalenol and 15-acetyl-deoxynivalenol), and a glycosylated derivative (deoxynivalenol-3-glucoside [D3G]) in corn-based products. The analytes were extracted from samples with acetonitrile-water (85:15, vol/vol) and then purified with multifunctional columns. Evaluation of five kinds of multifunctional columns revealed that DON and its acetylated derivatives were recovered well (96 to 120%) by all columns, but D3G w

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9

Mistry, Rakesh N., and K. R. Desai. "Studies on Synthesis of Some Novel Heterocyclic Chalcone, Pyrazoline, Pyrimidine - 2 - One, Pyrimidine - 2 - Thione,para-Acetanilide Sulphonyl and Benzoyl Derivatives and their Antimicrobial Activity." E-Journal of Chemistry 2, no. 1 (2005): 30–41. http://dx.doi.org/10.1155/2005/953107.

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1, 2 - Dichloro benzene on chlorosulphonation by chlorosulphonic acid gives 1, 2 - [dichloro] - benzene sulphonyl chloride which on condensation withp–amino acetophenone gives 1-[acetyl] - 1’ , 2’ - [dichloro] - dibenz sulphonamide derivative. This derivative undergo condensation with 2,4- dichloro benzaldehyde gives 1- [3” - (sub. phenyl) - 2” - propene - 1” - one] - 1’ , 2’ - [dichloro] - dibenz sulphonamide derivative which on reaction with 99% hydrazine hydrate and glacial acetic acid gives 1-[acetyl]-3- [1’ , 2’ - (dichloro) - dibenz sulphonamide] -5 - [2” , 4” - dichloro phenyl] - 2 - py

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10

Nassan, Mohamed A., Adil Aldhahrani, Hamada H. Amer та ін. "Investigation of the Anticancer Effect of α-Aminophosphonates and Arylidine Derivatives of 3-Acetyl-1-aminoquinolin-2(1H)-one on the DMBA Model of Breast Cancer in Albino Rats with In Silico Prediction of Their Thymidylate Synthase Inhibitory Effect". Molecules 27, № 3 (2022): 756. http://dx.doi.org/10.3390/molecules27030756.

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Breast cancer is a major cause of death in women worldwide. In this study, 60 female rats were classified into 6 groups; negative control, α-aminophosphonates, arylidine derivatives of 3-acetyl-1-aminoquinolin-2(1H)-one, DMBA, DMBA & α-aminophosphonates, and DMBA & arylidine derivatives of 3-acetyl-1-aminoquinolin-2(1H)-one. New α-aminophosphonates and arylidine derivatives of 3-acetyl-1-aminoquinolin-2(1H)-one were synthesized and elucidated by different spectroscopic and elemental analysis. Histopathological examination showed marked proliferation of cancer cells in the DMBA group. T

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11

Khan, Shazia, M. Nadeem Kardar, and Bina S. Siddiqui. "Arbutin Derivatives from the Seeds of Madhuca latifolia." Natural Product Communications 6, no. 11 (2011): 1934578X1100601. http://dx.doi.org/10.1177/1934578x1100601124.

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A new arbutin derivative, madhuglucoside (1), along with three known arbutin derivatives were isolated from the seeds of Madhuca latifolia in addition to seven other known constituents. Their structures were established on the basis of spectral analysis. Compounds 1a, 2a and 3a were obtained in a pure state after acetylation of the mother fraction and characterized as their acetyl derivatives.

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12

Al-Saleh, Balkis, Nouria Al-Awadi, Halema Al-kandari, Mervat Mohammed Abdel-Khalik, and Mohamed Hilmy Elnagdi. "Studies with 2H pyranones: Synthesis of new 3-substituted-4-hydroxy-2H-pyran-2-ones." Journal of Chemical Research 2000, no. 1 (2000): 16–17. http://dx.doi.org/10.3184/030823400103165725.

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3-Acetyl-4-hydroxy-6-methyl-2H-pyran-2-one 1a condensed with N,N-dimethylformamide dimethyl acetal yielding the enaminone 3a. The latter reacted with a variety of reagents affording pyridine derivatives 11, benzofuranoylpyranes 14 and 17, pyranylpyranes 22, pyranylpyrazole 29a,b and pyranylisoxazole 33.

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13

Krečmerová, Marcela, Hubert Hřebabecký, and Antonín Holý. "Synthesis of 5-Phenylcytosine Nucleoside Derivatives." Collection of Czechoslovak Chemical Communications 61, no. 4 (1996): 645–55. http://dx.doi.org/10.1135/cccc19960645.

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Reaction of silylated 5-phenylcytosine with 1-O-acetyl-2,3,5-tri-O-benzoyl-D-ribose, catalyzed with tin tetrachloride, and subsequent methanolysis afforded 5-phenylcytidine (2). This compound reacted with thionyl chloride in acetonitrile to give cyclic sulfite 3 which on heating in dimethylformamide was converted into 2,2'-anhydro-1-(β-D-arabinofuranosyl)-5-phenylcytosine (4). Analogous reaction of compound 2 with thionyl chloride at reflux gave 5'-chloro-5'-deoxy-2',3'-cyclic sulfite 5. Its heating in dimethylformamide afforded 5'-chloro-2,2'-anhydro derivative 6, mild alkaline hydrolysis led

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14

Patel, H. S., H. D. Desai, and H. J. Mistry. "Synthesis and Antimicrobial Activity of Some New Piperazine Derivaties Containing Aryl Sulfonyloxy Group." E-Journal of Chemistry 1, no. 2 (2004): 93–98. http://dx.doi.org/10.1155/2004/732420.

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NovelN-substituted piperazine derivatives containing sulfonyloxy aniline moiety have been prepared. The various 4-sulfonyloxy aniline (SA) derivatives (2a-h) have been prepared by the condensation reaction ofN-Acetyl Sulfanilyl chloride (ASC) and sodium phenates followed by hydrolysis. The SA derivatives are then reacted with chloro acetyl chloride to give corresponding (N-Chloroacetyl) derivatives (3a-h). These derivatives are then reacted withN-phenyl piperazine to yield the corresponding piperazine derivatives (4a-h).

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15

Kantlehner, Willi, Birgit Heckel, and Jochen Mezger. "Orthoamide und Iminiumsalze, CI. Umsetzungen von N,N,N′,N′-Tetramethylharnstoffdiethylacetal mit CH2-aciden Verbindungen." Zeitschrift für Naturforschung B 75, no. 9-10 (2020): 865–80. http://dx.doi.org/10.1515/znb-2020-0072.

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AbstractN,N,N′,N′-Tetramethylurea diethylacetal reacts with CH2-acidic compounds as benzylcyanide, cyanoacetic acid derivatives malonodinitrile and nitromethane to give ketene aminals or ketene-O,N-acetales. Low polar solvents favour mostly the formation of ketenaminals. The yields of ketenaminals and ketene-O,N-acetals can be improved in some cases by addition of trimethylsilyldimethylamine. The reactions of the urea acetal with diethylmalonate, ore acetyl acetone, stops at the stage of the N,N′,N″-permethylated guanidinium salts with carbanionic counterions. The formation of bis(dimethylamin

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16

Malak, Lourin G., Daoud W. Bishay, Afaf M. Abdel-Baky, Ahmed M. Moharram, Stephen J. Cutler, and Samir A. Ross. "New Anthraquinone Derivatives from Geosmithia lavendula." Natural Product Communications 8, no. 2 (2013): 1934578X1300800. http://dx.doi.org/10.1177/1934578x1300800215.

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A phytochemical study of Geosmithia lavendula Pitt led to the isolation of three new anthraquinones: 1-acetyl-2,4,6,8-tetrahydroxy-9,10-anthraquinone (1), 2-acetyl-1,4,5,7-tetrahydroxy-9,10-anthraquinone (2), and 1-acetyl-2,4,5,6,7-pentahydroxy-9,10-anthraquinone (3), as well as another new compound named didodecyl thiodipropionate (propionic acid, 3,3-sulfinyl di-1,1′-didodecyl ester) (4), along with ten known compounds: 1-acetyl-2,4,5,7-tetrahydroxy-9,10- anthraquinone (rhodolamprometrin) (5), 1-acetyl-2,4,5,7,8-pentahydroxy-9,10-anthraquinone (6), (22E)-ergosta-6,22-diene-3β,5α,8α-triol, p-

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17

Rali, Sibusiso, Opeoluwa O. Oyedeji, Olukayode O. Aremu, Adebola O. Oyedeji, and Benedicta N. Nkeh-Chungag. "Semisynthesis of Derivatives of Oleanolic Acid fromSyzygium aromaticumand Their Antinociceptive and Anti-Inflammatory Properties." Mediators of Inflammation 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/8401843.

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Oleanolic acid is a pentacyclic triterpenoid compound widely found in plants and well known for its medicinal properties. Oleanolic acid (OA) was isolated from the ethyl acetate extract ofSyzygium aromaticumflower buds. Semisynthesis afforded both acetate and ester derivatives. The derived compounds were monitored with thin layer chromatography and confirmed with nuclear magnetic resonance (NMR) spectroscopy, mass spectrometry (MS), Fourier infrared (FT-IR) spectroscopy, and melting point (Mp). All these compounds were evaluated for their analgesic and anti-inflammatory properties at a dose of

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18

Sarbu, Laura G., Lucian G. Bahrin, Peter G. Jones, Lucian M. Birsa, and Henning Hopf. "[2.2]Paracyclophane derivatives containing tetrathiafulvalene moieties." Beilstein Journal of Organic Chemistry 11 (October 15, 2015): 1917–21. http://dx.doi.org/10.3762/bjoc.11.207.

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The synthesis of [2.2]paracyclophane derivatives containing tetrathiafulvalene units has been accomplished by the coupling reaction of 4-([2.2]paracyclophan-4-yl)-1,3-dithiol-2-thione in the presence of trimethylphosphite. The 1,3-dithiol-2-thione derivative was in turn synthesized by the regioselective bromination of 4-acetyl[2.2]paracyclophane, then through the corresponding dithiocarbamates and 1,3-dithiolium salts.

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19

Hishmat, O. H., Kh M. A. Khalil, Sh I. El-Naem, and A. H. Abd el-Rahman. "Synthesis of Pyranobenzopyranopyridines and Benzodipyran Derivatives." Zeitschrift für Naturforschung B 41, no. 2 (1986): 252–58. http://dx.doi.org/10.1515/znb-1986-0217.

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6-Formyl-7-hydroxy-5-methoxy-2-methylchromone on bromination yields the 8-bromo derivative or the 8-bromo-6-formyl-5,7-dihydroxy derivative depending on the reaction condition. Cyclization of both leads to the corresponding 3-acetyl-, 3-benzoyl-, 3-carboxamido-, 3-carbethoxybenzodipyran derivatives.The 3-acetylbenzodipyran derivative when treated with ethyl acetoacetate or ethyl cyanoacetate in the presence of ammonium acetate yields the corresponding dihydropyranobenzopyranopyridine dione or the dihydropyranobenzopyranopyridine trione.The reaction of the 3-acetyl derivative with cyanoacetamid

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20

Adnan, Shaimaa, and Abdullah Shakir. "Synthesis and Characterization of some new Formazan Derivatives from 2-Amino-4-Hydroxy-6-Methyl Pyrimidine and Study the Biological Activity (Anti-Bacteria and Anti-Cancer)." INTERNATIONAL JOURNAL OF PHARMACEUTICAL QUALITY ASSURANCE 11, no. 01 (2020): 53–59. http://dx.doi.org/10.25258/ijpqa.11.1.8.

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This study involves a synthesis of some formazan derivatives starting from react chloro acetyl chlorid with 2-amino-4-hydroxy-6-methyl pyrimidine to gate compound (a), (a) react with hydrazine hydrate to give compound (b) also (b) react with 3-4-dimethoxy benzaldehyd to product Schiff base derivative (c) then (c) react with deferent amin derivatives to get formazan derivatives. All these compounds characterized by 13C-NMR, fourier transform infrared spectroscopy (FTIR), 1HMNR. After that, we study the biological activity for all formazan derivatives toward two different kinds of bacteria and a

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21

Kaválek, Jaromír, Josef Jirman, Vladimír Macháček, and Vojeslav Štěrba. "An anomalous effect of methyl group on acidity of acylthioureas." Collection of Czechoslovak Chemical Communications 52, no. 8 (1987): 1992–98. http://dx.doi.org/10.1135/cccc19871992.

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Dissociation constants and methanolysis rate constants have been measured of 1-acetyl- and 1-benzoylthioureas and their N-methyl derivatives. Replacement of hydrogen atom at N(1) (next to the acyl group) by methyl group increases the acidity of the benzoyl derivative by one order, that of the acetyl derivative by as much as two orders of magnitude. Replacement of both hydrogens at N(3) by methyl groups lowers the methanolysis rate constant by more than two orders, whereas the replacement of hydrogen atom at N(1) by methyl group increases the methanolysis rate by the factor of 30.

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22

Paruch, Kinga, Łukasz Popiołek, and Monika Wujec. "Antimicrobial and antiprotozoal activity of 3-acetyl-2,5-disubstituted-1,3,4-oxadiazolines: a review." Medicinal Chemistry Research 29, no. 1 (2019): 1–16. http://dx.doi.org/10.1007/s00044-019-02463-w.

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Abstract In the last 20 years there has been a significant increase in interest in the structure of oxadiazole derivatives, especially 3-acetyl-1,3,4-oxadiazolines. It is known that these derivatives possess: antibacterial, antifungal, antitubercular, antiprotozoal, anticancer and anti-inflammatory activity. Therefore, many medicinal chemists choose 3-acetyl-1,3,4-oxadiazoline scaffold for the synthesis of new potentially active substances with a better effectiveness and less toxicity. This article is a literature review since 2000 presenting new derivatives with proven antimicrobial and antip

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23

Graikou, Konstantia, Nektarios Aligiannis, Ioanna B. Chinou, and Catherine Harvala. "Cantleyoside-dimethyl-acetal and Other Iridoid Glucosides from Pterocephalus perennis – Antimicrobial Activities." Zeitschrift für Naturforschung C 57, no. 1-2 (2002): 95–99. http://dx.doi.org/10.1515/znc-2002-1-217.

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Cantleyoside-dimethyl-acetal (6), was isolated from the endemic Greek plant Pterocephalus perennis subsp. perennis in addition to five other known iridoid glucosides, loganin, loganic acid, cantleyoside, secologanin, and secologanin-dimethyl-acetal. The structure of these compounds was determined by all spectroscopic means mainly by NMR and MS techniques. The above compounds as well as their acetyl derivatives were tested against six Gram positive and negative bacteria and three pathogenic fungi.

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24

Cueto, Mercedes, José Darias, Aurelio San-Martín, and Juana Rovirosa. "New Acetyl Derivatives from AntarcticDeliseafimbriata." Journal of Natural Products 60, no. 3 (1997): 279–81. http://dx.doi.org/10.1021/np960175f.

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25

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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26

Rodríguez, Ricaurte, Omar León, Felipe Quiroga, and Jonnathan Cifuentes. "N-{2-[(3-Oxo-1,3-dihydro-2-benzofuran-1-yl)acetyl]phenyl}acetamide." Molbank 2021, no. 3 (2021): M1244. http://dx.doi.org/10.3390/m1244.

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With the aim of obtaining different derivatives belonging to the isoindolo[2,1-a]quinoline family, we have synthesized a novel N-{2-[(3-oxo-1,3-dihydro-2-benzofuran-1-yl)acetyl]phenyl}acetamide derivative by a Claisen–Smichdt-type condensation reaction in 75% yield.

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27

Girges, Margret Mansour, Mokhtar Ayad Hanna, Hussien Mohamed Hassan, and Evelin Boshra Moawad. "Synthesis of some new 3-substituted-4-hydroxy-1-methyl-quinolin-2-one derivatives as potential antibacterial and antifungal agents." Collection of Czechoslovak Chemical Communications 53, no. 12 (1988): 3179–83. http://dx.doi.org/10.1135/cccc19883179.

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3-Acetyl-4-hydroxy-1-methylquinolin-2-one (I) and its bromo derivative II were allowed to react with different reagents to get new quinoline derivatives that have different heterocyclic moieties at position 3. The antibacterial and antifungal activities of the products were also evaluated.

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28

Kurfürst, Antonín, Pavel Lhoták, Petr Nádeník, Františka Raclová-Pavlíková, and Josef Kuthan. "2-(Biphenyl-4-yl)-5-phenyl-1,3,4-oxadiazole (PBD): Electrophilic 4’-substitution and following transformations." Collection of Czechoslovak Chemical Communications 56, no. 7 (1991): 1495–504. http://dx.doi.org/10.1135/cccc19911495.

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PBD was converted into 4’-substituted derivatives I-XII using usual electrophilic reagents. The decomposition of PBD, 4’-acetyl derivative I and 4’-nitro derivative VI with hydroiodic acid gave 4’-substituted 4-biphenylcarboxylic acids XIIIa-XIIIc and benzoic acid, respectively. The regioselectivity of the reaction was also proved by means of high resolution NMR spectroscopy.

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29

Bębenek, Ewa, Elwira Chrobak, and Monika Kadela-Tomanek. "28-O-Acetyl-3-O′-(prop-2-enoyl)betulin." Molbank 2023, no. 3 (2023): M1696. http://dx.doi.org/10.3390/m1696.

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28-Acetylbetulin is a good starting compound for the synthesis of 3- or 3,28-substituted betulin derivatives with biological activity. The final product of the reaction of 28-acetylbetulin and acrylic acid under Steglich esterification conditions produced a new 3-alkenyl betulin derivative. The structure of the obtained compound was confirmed based on the analysis of NMR, IR, EI MS, and HRMS spectra. Selected pharmacokinetic parameters related to the absorption and distribution were calculated for the new betulin derivative using in silico methods.

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30

Musin, A. I., Yu G. Borisova, Sh Sh Dzhumaev, et al. "Synthesis and biological activity of 5-acetyl- and 5-hydroxyalkyl1,3-dioxane derivatives." Fine Chemical Technologies 18, no. 4 (2023): 381–91. http://dx.doi.org/10.32362/2410-6593-2023-18-4-381-391.

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Objectives. To synthesize derivatives of 5-acetyl- and 5-hydroxyalkyl-1,3-dioxanes and evaluate their effect on platelet aggregation and plasma hemostasis.Methods. To determine the qualitative and quantitative composition of the reaction masses, gas chromatography-, chromate mass spectrometry-, and 1H and 13C nuclear magnetic resonance spectrometry methods were used.Results. Derivatives of 5-acetyl- and 5-hydroxyalkyl-1,3-dioxanes were obtained under thermal heating conditions in order to evaluate their effect on platelet aggregation and plasma hemostasis.Conclusions. Derivatives of 5-acetyl-

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31

Hanaya, Tadashi, Kiyoshi Torigoe, Kazuyuki Soranaka, Horoshi Yamamoto, Yao Qizhengt, and Wolfgang Pfleiderer. "Pteridines CV." Pteridines 6, no. 1 (1995): 1–7. http://dx.doi.org/10.1515/pteridines.1995.6.1.1.

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Summary Treatment of L-biopterin (I) with N,N-dimethyformamide dimethyl- (or diethyl)acetal and then with acetic anhydride in pyridine gave 1',2'-di-O-acetyl-N'-(N,N-dimethylaminomethylene)-L-biopterin (4), which was converted by the Mitsunobu reaction into 3-methyl (5) and 3-p-nitrophenetyl derivatives (7). The protective groups on the side chain diols and N2 of these compounds were selectively cleaved to furnish products 6, 8-10, among which 9 is naturally occurring 3-methyl-L-biopterin and 8 is N',N(3)-protected biopterin, a versatile intermediate for various reactions on the side-chain dio

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32

Raev, Lyubomir Dimitrov, Ivo Christov Ivanov, Henri Angel Astroug, Wolfgang Frey, and Silviya Georgieva Agontseva. "Synthesis of some 6-alkylureido-4-aryl-2(1H)-pyridones: further transformations and pharmacological activity." Zeitschrift für Naturforschung B 70, no. 11 (2015): 797–807. http://dx.doi.org/10.1515/znb-2015-0066.

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AbstractThe Michael addition of enaminoesters to coumarins (1) does not lead to the formation of simple adducts 3 but to the rearranged 4-aryl-2-pyridone 4a. Now, N-carbamoylation of the 6-amino-2-pyridone 4a with alkyl isocyanates and further transformation of the corresponding novel ureido-2-pyridone derivatives 6a–g into chromeno[3,4-c]pyridines 5d,g and O-acetyl derivatives 7a–g are reported. All newly synthesized compounds were characterized by means of 1H/13C NMR, MS, IR spectra and elemental analysis. The structure of the ureide 6f and of the N-cyclohexyl-O-acetyl derivative 7g were add

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33

Hassan, Md Mahadi, Anjana Adhikari-Devkota, Teruko Imai, and Hari Prasad Devkota. "Zerumbone and Kaempferol Derivatives from the Rhizomes of Zingiber montanum (J. Koenig) Link ex A. Dietr. from Bangladesh." Separations 6, no. 2 (2019): 31. http://dx.doi.org/10.3390/separations6020031.

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Zingiber montanum (J. Koenig) Link ex A. Dietr. (Zingiberaceae) is known as “Banada” in Bangladesh, and the rhizomes are frequently used in traditional medicines for the treatment of constipation, dyspepsia, flatulence, stomach bloating, and as mosquito repellant. In this study, dried rhizomes were extracted successively with 95% and 50% ethanol and the combined extract was then subjected to various column chromatographic methods to isolate one sesquiterpenoid derivative, zerumbone (1) and five kaempferol derivatives, i.e., kaempferol 3-O-methyl ether (2), kaempferol 3-O-α-rhamnopyranoside (3)

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34

Konečný, Václav, Jozefína Žúžiová, Štefan Kováč, and Tibor Liptaj. "Synthesis of Novel 4-Amino-5-(disubstituted amino)-2-phenyl-2H-pyridazin-3-ones." Collection of Czechoslovak Chemical Communications 62, no. 5 (1997): 800–808. http://dx.doi.org/10.1135/cccc19970800.

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Substituted 4-amino-2-phenyl-2H-pyridazin-3-ones 5a-5j have been prepared from 4-amino-5-chloro-2-phenyl-2H-pyridazin-3-one 1 which on reactions with acetyl chloride or acetic anhydride gives 4-acetylamino derivative 2 or 4-diacetylamino derivative 3, respectively. Derivatives 2 and 3 with dialkylamines and cyclic amines yielded appropriate 4-acetylamino-5-(disubstituted amino)-2-phenyl-2H-pyridazin-3-ones 4a-4j. Subsequent alkaline hydrolysis of the acetylamino derivatives 4a-4j let to the title compounds 5a-5j, which were screened for pesticidal activity, but none of them reached activity of

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35

Hřebabecký, Hubert, та Antonín Holý. "Synthesis of Deoxy, Dideoxy and Didehydrodideoxy Analogs of 9-(4-C-Hydroxymethyl-α-L-pentofuranosyl)adenine". Collection of Czechoslovak Chemical Communications 59, № 7 (1994): 1654–64. http://dx.doi.org/10.1135/cccc19941654.

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Condensation of 1,2-di-O-acetyl-3,5-di-O-benzoyl-4-C-benzoyloxymethyl-L-arabinofuranose with N6-benzoyladenine, catalyzed with tin tetrachloride, afforded nucleoside I, which upon partial deacetylation and subsequent mesylation was converted into 9-(3,5-di-O-benzoyl-4-C-benzoyloxymethyl-2-O-methanesulfonyl-α-L-arabinofuranosyl)adenine (III). 9-(2,5,6-Tri-O-acetyl-4-C-acetoxymethyl-3-O-methanesulfonyl-α-L-arabinofuranosyl)-N6-benzoyladenine (V) was obtained by condensation of 1,2,5-tri-O-acetyl-4-C-acetoxymethyl-3-O-methanesulfonyl-L-arabinose with N6-benzoyladenine. Reaction of mesyl derivativ

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36

Zhao, Dongxin, Li Ma, Kui Lu, and Juan He. "Solid Phase Syntheses of Ferulic Acid Derivatives Acetyl Feruloyl Tyrosine and Acetyl Feruloyl Valyl Tyrosine." Open Biotechnology Journal 9, no. 1 (2015): 1–5. http://dx.doi.org/10.2174/1874070701509010001.

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Ferulic acid was used as a common drug for cardia-cerebrovascular disease and leukopenia, but the application of ferulic acid was inhibited by the poor absorption and stability. The improvement of these defects can be realized by modifying ferulic acid by amino acids, because the amido bond can increase the bioavailability and therapeutic effect of some drugs based on the peptide transporter system of mammalian which can transport the peptidyl drugs. The peptidyl derivatives of ferulic acid, namely acetyl feruloyl tyrosine and acetyl feruloyl valyl tyrosine, were synthesized using Fmoc solid-p

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37

Hickman, RJS, BJ Christie, RW Guy, and TJ White. "Synthesis of Aromatic S-Sustituted Derivatives of N-Acetyl-L-cysteine." Australian Journal of Chemistry 38, no. 6 (1985): 899. http://dx.doi.org/10.1071/ch9850899.

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A new method for the preparation of aromatic, S-substituted derivatives of N-acetyl-L- cysteine is described. The method involves nucleophilic substitution of aromatic iodides by N-acetyl-L- cysteine in the presence of copper(I) iodide, and provides the first example of nucleophilic substitution of unactivated aromatic halides by N-acetyl-L- cysteine . The method has been used to prepare N-acetyl-S-(2-thienyl)-L- cysteine and N-acetyl-S-(3-thienyl)-L- cysteine from 2-iodothiophen and 3-iodothiophen respectively. In addition, the method has been successfully applied to iodobenzene and 1-iodonap

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38

Bystrický, Slavomír, Tibor Sticzay, Štefan Kučár, Eva Petráková, and Rudolf Toman. "Chiroptical properties of monosaccharide acetyl derivatives." Collection of Czechoslovak Chemical Communications 50, no. 3 (1985): 683–89. http://dx.doi.org/10.1135/cccc19850683.

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Circular dichroism of positional isomers of acetylated methyl β-D-xylopyranosides, 1,6-anhydro-β-D-glucopyranoses and methyl α-L-rhamnopyranosides is discussed considering the mechanism of optical rotatory strength nature. Interactions determining the signs are influenced by the character of the solvent. Magnitude of the effect depends on the spatial arrangement of the chromophore environment. This effect is lowered with diacetyl derivatives, where the interaction of transitional dipole moments of acetyl groups is the main source of optical rotational strength.

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39

Saify, Zafar Saeed, Khalid Mohammed Khan, Syed Moazzam Haider, et al. "Syntheses and Evaluation of the Analgesic Activity of Some 4-Acetyl- 4-phenylpiperidine and 4-Hydroxy-4-phenylpiperidine Derivatives." Zeitschrift für Naturforschung B 54, no. 10 (1999): 1327–36. http://dx.doi.org/10.1515/znb-1999-1017.

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Synthesis and analgesic activity of 4-phenylpiperidine derivatives is a topic of high actuality. A s part of a programme towards obtaining new potential analgesics, ten derivatives of 4- acetyl-4-phenylpiperidine and ten derivatives of 4-hydroxy-4-phenylpiperidine were synthesised and characterized through spectroscopic techniques. All derivatives along with the parent compounds were evaluated for analgesic activity in the acetic acid-induced writhing assay and tail-flick test in mice. All derivatives of 4-acetyl-4-phenylpiperidine except one com pound exhibited more or less protection against

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40

Hishmat, O. H., S. S. Mabrouk, A. M. M. Nasef, N. M. A. Shayeb, and S. A. Ismail. "Derivatives of Khellinonequinone and their Aflatoxigenic Activity." Zeitschrift für Naturforschung B 43, no. 3 (1988): 343–46. http://dx.doi.org/10.1515/znb-1988-0318.

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Nitration of khellinone leads to the formation of a small amount of 3-nitrokhellinone and 5-acetyl-6-hydroxybenzofuran-4.7-dione (khellinonequinone) as a main product. The latter compound reacts with primary amines to give the corresponding imino compounds. Reaction of khellinone with o-phenylenediamine involves condensation followed by cyclisation. While on the other hand treating with phenyl hydrazines gives the phenyl hydrazone. The pyrazolobenzofuran derivative was obtained by the action of hydrazine hydrate on khellinonequinone. Finally the reaction with malononitrile leads to the formati

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41

WERNER, Ernst R., Hans-Jörg HABISCH, Antonius C. F. GORREN, et al. "Contrasting effects of N5-substituted tetrahydrobiopterin derivatives on phenylalanine hydroxylase, dihydropteridine reductase and nitric oxide synthase." Biochemical Journal 348, no. 3 (2000): 579–83. http://dx.doi.org/10.1042/bj3480579.

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Tetrahydrobiopterin [(6R)-5,6,7,8-tetrahydro-L-biopterin, H4biopterin] is one of several cofactors of nitric oxide synthases (EC 1.14.13.39). Here we compared the action of N5-substituted derivatives on recombinant rat neuronal nitric oxide synthase with their effects on dihydropteridine reductase (EC 1.6.99.7) and phenylalanine hydroxylase (EC 1.14.16.1), the well-studied classical H4biopterin-dependent reactions. H4biopterin substituted at N5 with methyl, hydroxymethyl, formyl and acetyl groups were used. Substitution at N5 occurs at a position critical to the redox cycle of the cofactor in

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42

Khalil, El-Galil, Moged Berghot, and Mostafa Gouda. "Design, synthesis and antibacterial activity of new phthalazinedione derivatives." Journal of the Serbian Chemical Society 76, no. 3 (2011): 329–39. http://dx.doi.org/10.2298/jsc091122028k.

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Dibenzobarrelene (1) was utilized as the key intermediate for the synthesis of some new 2-substituted (1,4-dioxo-3,4,4e,5,10,10ahexahydro- 1H-5,10-benzeno-benzo[g]phthalazine: 2, 5a-d, 8a-c and 10. Condensation of 2 with benzaldehyde or anisaldehyde gave the corresponding acrylonitrile derivative 3a, b, respectively. Thiophene derivatives 4a, b were obtained via the Gewald reaction of 2 with cyclohexanone or pentanone, respectively. Treatment of 5d with acetyl chloride or p-toluenesulfonyl chloride afforded the corresponding esters 6, 7, respectively. Cyclization of 8a-c with formalin afforded

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43

Nakagawa, Hiroyuki, Yosuke Matsuo, Susan McCormick, and Chee Wei Lim. "Development of an LC-MS/MS Determination Method for T-2 Toxin and Its Glucoside and Acetyl Derivatives for Estimating the Contamination of Total T-2 Toxins in Staple Flours." Journal of AOAC INTERNATIONAL 101, no. 3 (2018): 658–66. http://dx.doi.org/10.5740/jaoacint.17-0362.

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Abstract A determination method previously validated for trichothecenes and zearalenone by means of liquid chromatography-tandem mass spectrometry (LC-MS/MS) was adapted for the quantification of T-2 toxin (T-2) as well as its glucoside and acetyl derivatives, T-2-3-glucoside (T-2-3G) and 3-acetyl-T-2 (3A-T-2). HT-2 toxin (HT-2) and its acetyl derivative 3-acetyl-HT-2 (3A-HT-2) were also included as the target chemicals. Staple flours (56 samples collected from the Singapore market) were examined for contamination from T-2 and/or HT-2 and their derivatives. Among them, 16 flours were found to

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44

Wang, Fang, Chun Wang, Jie Wang та ін. "N ɛ -acetyl lysine derivatives with zinc binding groups as novel HDAC inhibitors". Royal Society Open Science 6, № 6 (2019): 190338. http://dx.doi.org/10.1098/rsos.190338.

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HDAC inhibitors have been developed very rapidly in clinical trials and even in approvals for treating several cancers. However, there are few reported HDAC inhibitors designed from N ɛ -acetyl lysine. In the current study, we raised a novel design, which concerns N ɛ -acetyl lysine derivatives containing amide acetyl groups with the hybridization of ZBG groups as novel HDAC inhibitors.

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45

Chodounská, Hana, та Vladimír Pouzar. "Preparation of 3-(6-Deoxy-β-D-glucopyranosyloxy) and 3-(6-Deoxy-α-L-mannopyranosyloxy)androstane Derivatives with Unsaturated Side Chain in Position 17β". Collection of Czechoslovak Chemical Communications 58, № 12 (1993): 3000–3008. http://dx.doi.org/10.1135/cccc19933000.

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In our previous papers we described the preparation of 3-β-D-glucopyranosyloxy) and 3-β-D-galactopyranosyloxy) derivatives of steroids with an α,β-unsaturated ester chain in position 17β of androstane skeleton. In conection with this project we have studied silver silicate promoted glycosylation of some of above mentioned steroidal derivatives with 2,3,4-tri-O-acetyl-6-deoxy-α-D-glucopyranosyl bromide and 2,3,4-tri-O-acetyl-6-deoxy-α-L-mannopyranosyl bromide.

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46

Heleyová, Katarína, Dušan Ilavský, Vladimír Bobošík, and Naďa Prónayová. "Gould-Jacobs Reaction of 5- and 6-Amino-2-substituted Benzoxazoles. II. Reaction with 3-Ethoxymethylene-2,4-pentanedione and Ethyl 2-Ethoxymethylene-3-oxobutanoate." Collection of Czechoslovak Chemical Communications 61, no. 3 (1996): 371–80. http://dx.doi.org/10.1135/cccc19960371.

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Nucleophilic reaction of 5-amino- and 6-amino-2-substituted benzoxazoles 1 and 2 with 3-ethoxymethylene-2,4-pentanedione (3) gave compounds 5 and 6. Compounds 1 and 2 reacted with ethyl ethoxymethylene-3-oxobutanoate (4) under formation of compounds 7and 8. The substitution products 7 and 8 underwent thermal cyclization at high temperature (boiling mixture of diphenyl ether and biphenyl) to give angularly and linearly annelated derivatives of 5-acetyl-4-oxo-oxazolo[4,5-f]quinoline 9 and 7-acetyl-8-oxo-oxazolo[5,4-g]quinoline 10 (from 7), and derivatives of 8-acetyl-9-oxo-oxazolo[5,4-f]quinolin

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47

Neamah, Rawaa, та Shaimaa Adnan. "Study the Biological Activity for Shiff Base and Β – Lactam Compounds that Synthesis and Identification from Pyrimidine Derivatives". International Journal of Pharmaceutical Quality Assurance 11, № 01 (2013): 37–39. http://dx.doi.org/10.25258/ijpqa.11.1.12.

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In This study We are synthesis and characterization of some Schiff base and β- lactam derivatives) by three steps. The First react 2-amino-4-Chloro-6-methyl pyrimidine with 4-amino acetophenone in an acid medium to get shiff base derivative(E)-4-(1-((4-Chloro-6-methyl pyridine-2-yl)imino)ethyl)aniline (1), the second step (1) react with (3,4- dimethoxybenzal dehyde,4-methyl benzaldehyde,4-dimethylamino benzaldehyde,4-bromo benzaldehyde,4–hydroxy benzaldehyde, 4-Nitro benzaldehyde) to get Schiff base derivatives (2-7), the last step (2-7) derivatives react with Chloro acetyl chloride to get –β-

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48

Marchalín, Štefan, and Josef Kuthan. "Synthesis of cyano derivatives with diazaquaterphenyl skeleton." Collection of Czechoslovak Chemical Communications 50, no. 8 (1985): 1870–77. http://dx.doi.org/10.1135/cccc19851870.

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Cyclocondensation of 3-aryl-2-arylmethylene-3-oxopropanenitriles I with 4,4'-diacetylbiphenyl (II) in the presence of ammonium acetate gives para-substituted 4''-acetyl-3,5-diphenyl-2-aza-1:1',4':1''-terphenyls III and 4,4'''-dicyano-3,3''',5,5'''-tetraphenyl-2,2'''-diaza-1:1',4':1'',4'':1'''-quaterphenyls IV. Analogous reaction of the acetyl derivative IIIe with the oxonitriles Ie and Ia afforded the corresponding products IVe and V.

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49

Gomes, Lígia R., John Nicolson Low, Diogo Magalhães e Silva, Fernando Cagide, and Fernanda Borges. "Crystal structures of five 6-mercaptopurine derivatives." Acta Crystallographica Section E Crystallographic Communications 72, no. 3 (2016): 307–13. http://dx.doi.org/10.1107/s2056989016001833.

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The crystal structures of five 6-mercaptopurine derivatives,viz.2-[(9-acetyl-9H-purin-6-yl)sulfanyl]-1-(3-methoxyphenyl)ethan-1-one (1), C16H14N4O3S, 2-[(9-acetyl-9H-purin-6-yl)sulfanyl]-1-(4-methoxyphenyl)ethan-1-one (2), C16H14N4O3S, 2-[(9-acetyl-9H-purin-6-yl)sulfanyl]-1-(4-chlorophenyl)ethan-1-one (3), C15H11ClN4O2S, 2-[(9-acetyl-9H-purin-6-yl)sulfanyl]-1-(4-bromophenyl)ethan-1-one (4), C15H11BrN4O2S, and 1-(3-methoxyphenyl)-2-[(9H-purin-6-yl)sulfanyl]ethan-1-one (5), C14H12N4O2S. Compounds (2), (3) and (4) are isomorphous and accordingly their molecular and supramolecular structures are s

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50

Edwards, Oliver E., Dusan Dvornik, Ralph J. Kolt, and Barbara A. Blackwell. "Formation, reactions, and NMR spectra of 1,20-cycloatidanes." Canadian Journal of Chemistry 70, no. 5 (1992): 1397–405. http://dx.doi.org/10.1139/v92-178.

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Imines derived from the alkaloid atisine gave N-acetyl 1,20-cycloatidane derivatives when heated with acetic anhydride. Vigorous alkaline hydrolysis cleaved the cyclopropane ring, regenerating the parent imine. The 1H and 13C NMR spectra of several 1,20-cyclo derivatives have been assigned and compared to those of the parent imines 2. All of the N-acetyl compounds showed doubling of the majority of the NMR resonances, due to amide rotamers. The effects of the cyclopropane ring current are noted.

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