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Journal articles on the topic 'Derivatives 5'

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Published: 2 June 2025

Last updated: 31 July 2025

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1

Drašar, Pavel, and Jiří Beránek. "2',3'-O-Carbonyl derivatives of 6-azauridine in the synthesis of its 5-substituted and 5'-deoxy derivatives." Collection of Czechoslovak Chemical Communications 52, no. 8 (1987): 2070–82. http://dx.doi.org/10.1135/cccc19872070.

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Preparation of 2',3'-O-carbonyl derivatives of 5'-deoxy-6-azauridine and 6-azauridine using 1,1'-carbonyldiimidazole has been elaborated. 5'-Chloro and 5'-bromo derivatives were prepared by treatment of the 5'-O-mesyl derivative with quaternary ammonium halides, 5'-chloro derivatives also by direct halogenation with thionyl chloride in hexamethylphosphortriamide or with tetrachloromethane, triphenyl phosphine, and dimethylformamide. Derivatives of 5'-bromo-6-azauridine were reduced with tributyltin hydride to 5'-deoxy-6-azauridine compounds. 6-Azauridine 2',3'-carbonate (IVa) and its 5'-deriva

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2

Liu, Xin-Hua, Bao-An Song, Pinaki S. Bhadury, et al. "Novel 5-(3-(Substituted)-4,5-dihydroisoxazol-5-yl)-2-methoxyphenyl Derivatives: Synthesis and Anticancer Activity." Australian Journal of Chemistry 61, no. 11 (2008): 864. http://dx.doi.org/10.1071/ch07395.

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Thirty novel 5-(3-(substituted phenyl)-4,5-dihydroisoxazol-5-yl)-2-methoxyphenyl derivatives were synthesized and evaluated for their antitumour activity. The bioassays showed that the 2-fluorobenzoyl derivative 6ai, the 4-trifluoromethylbenzoyl derivative 6ah, and the 3-trifluoromethyl isoxazole derivatives (6ch and 6ci) were highly effective against PC-3 cells. The IC50 values of 6ah and 6ai against PC-3 cells were 1.5 and 1.8 μg mL–1, respectively.

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3

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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4

Persson, T., A. B. Hörnfeldt, S. Gronowitz та N. G. Johansson. "Synthesis of Mimics to 5-(2″-thienyl)-2′,3′-β-Dideoxyuridine Triphosphate". Antiviral Chemistry and Chemotherapy 7, № 2 (1996): 101–7. http://dx.doi.org/10.1177/095632029600700207.

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A series of 5′-amido derivatives of 5-(2″-thienyl)-2′,3′,5′-β-trideoxyuridine were prepared. The compounds were tested for their inhibition of cellular DNA polymerase α and α HIV-RT. The succinic fumaric and maleic acid derivatives of 5-(2″-thienyl)-2′,3′,5′-β-trideoxyuridine were investigated. None of the compounds inhibited HIV-RT. The fumaric acid derivative inhibited DNA pol α with IC50 33 μg ml−1. The succinic acid derivative was about half as active with IC50 76 μg ml−1. The 5′-N-acyl derivatives also were structurally compared to the monomethyl ester of the triphosphate using the Sybyl

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5

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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6

Journal, Baghdad Science. "Synthesis and Characterization of New Heterocyclic Compounds from 2, 5- dimercapto -1, 3, 4-Thiadiazole and Their Resins." Baghdad Science Journal 13, no. 2 (2016): 275–88. http://dx.doi.org/10.21123/bsj.13.2.275-288.

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In this research, a new 1, 3, 4-Thiadiazole derivatives have been synthesized by many heterocyclic reactions. Starting from (2, 5 – dimercapto -1, 3, 4-Thiadiazole) a variety of derivatives have been synthesis. Compound (1) was synthesized by the reaction of hydrazine hydrate with carbon disulphide in absolute ethanol. The compound (1) was reacted with 1, 2-dibromoethane in presence of alkali ethanol to give the compound (2). The compound (3) was formed from the reaction of compound (2) with hydrazine hydrate. Schiff base (4) was obtained by reacting of compound (3) with the compound (p-hydrox

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7

Engesser, Tobias, and Reinhard Brückner. "Stereoselective Aldol Additions of Glycolic Acid and Its Derivatives." Synthesis 51, no. 08 (2019): 1715–45. http://dx.doi.org/10.1055/s-0037-1611721.

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This review gives a comprehensive overview of aldol additions of glycolic acid derivatives to achiral aldehydes and acetals affording α,β-dihydroxycarboxylic acids or derivatives thereof. The focus is on simple diastereoselectivity. A selection of related aldol additions is also presented: aldol additions of glycolic acid derivatives to ketones with two different substituents and aldol additions of α-substituted glycolic acid derivatives.1 Introduction1.1 Organization of this Review1.2 Outside the Scope of this Review: Aldol Additions Giving α,β-Dihydroxyaldehydes and α,β-Dihydroxyketones Dias

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8

Holý, Antonín, Joachim König, Jiří Veselý, Dieter Cech, Ivan Votruba, and Erik De Clercq. "5'-O-Alkyl-5-fluorouridines: Synthesis and biological activity." Collection of Czechoslovak Chemical Communications 52, no. 6 (1987): 1589–608. http://dx.doi.org/10.1135/cccc19871589.

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Methyl 2,3-O-isopropylidene-D-ribofuranoside (IV) was alkylated with alkyl halides in the presence of sodium hydride and the products were transformed by acid hydrolysis and glycosylation into methyl 5-O-alkyl-D-ribofuranosides VII. Benzoylation of VII followed by acetolysis afforded 1-O-acetyl-2,3-di-O-benzoyl-5-O-alkyl-D-ribofuranoses IX which on reaction with 2,4-bis(trimethylsilyloxy)pyrimidine in the presence of tin tetrachloride in acetonitrile and subsequent hydrolysis gave 5'-O-alkyl-2',3'-di-O-benzoyluridines XIa-XIe. Methanolysis of compounds XI furnished 5'-O-alkyluridines III. The

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9

Mistry, Rakesh N., and K. R. Desai. "Studies on Synthesis of Some Novel Heterocyclic Azlactone Derivatives and Imidazolinone Derivatives and their Antimicrobial Activity." E-Journal of Chemistry 2, no. 1 (2005): 42–51. http://dx.doi.org/10.1155/2005/542938.

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p- Methyl benzoic acid on reaction with phosphorus pentachloride gives p - methyl benzoyl chloride derivative which on condensation with glycine gives p - methyl benzoyl glycine derivative. Now, this p - methyl benzoyl glycine derivative on condensation with various substituted aldehydes gives corresponding substituted 4 - [aryl methylidine] - 2 - [p - methyl phenyl] - oxazole - 5 - one derivatives [1(a-j)]. Further, these derivatives [1(a-j)] on condensation with 4 , 4’ - diamino diphenyl sulphone gives corresponding substituted imidazolinone - dibenzsulphone derivatives [2(a-j)], on condensa

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10

Dutta, Saikat, Linglin Wu, and Mark Mascal. "Production of 5-(chloromethyl)furan-2-carbonyl chloride and furan-2,5-dicarbonyl chloride from biomass-derived 5-(chloromethyl)furfural (CMF)." Green Chemistry 17, no. 7 (2015): 3737–39. http://dx.doi.org/10.1039/c5gc00936g.

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Biomass-derived CMF is oxidized to the acid chloride CMFCC in a single step using inexpensive t-butyl hypochlorite. Likewise, DFF, also a CMF derivative, is oxidized directly to the diacid chloride FDCC. The products are platforms for a variety of chemical derivatives of carbohydrates.

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11

Panyatip, Panyada, Nadtanet Nunthaboot, and Ploenthip Puthongking. "In Silico ADME, Metabolism Prediction and Hydrolysis Study of Melatonin Derivatives." International Journal of Tryptophan Research 13 (January 2020): 117864692097824. http://dx.doi.org/10.1177/1178646920978245.

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Melatonin (MLT) is a well-known pineal hormone possessed with remarkable biological activities. However, its low oral bioavailability and high first-pass metabolism rate are important pharmacokinetics problems. Therefore, 5 MLT derivatives (1-5) were designed and synthesised in our group to solve these problems. In this work, in silico analysis of all synthetic derivatives for pharmacokinetic and drug-likeness parameters were predicted by SwissADME software. The results revealed that all derivatives (1-5) met the requirements for ideal oral bioavailability and CNS drugs. The molecular docking

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12

Abdelhamid, Abdou Osman, and A. S. Shawali. "Synthesis of Some New 2-Imino-2,3-dihydro-1,3,4-thiadiazole and Selenadiazole Derivatives." Zeitschrift für Naturforschung B 42, no. 5 (1987): 613–16. http://dx.doi.org/10.1515/znb-1987-0516.

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(2)Diazotized 3(5)amino-5(3)-phenylpyrazole reacts with phenacylthiocyanate (1) and phenacylselenocyanate (10) to give the corresponding 1,3,4-thiadiazoline derivative (5) and 1,3,4- selenadiazoline derivative (12), respectively. A mechanism is proposed and it is substantiated by an alternate synthesis of 5 and 12 from the corresponding hydrazidoyl bromide (6) with potassium thiocyanate and potassium selenocyanate, respectively. The thiadiazoline (5) and selenadiazoline (12) give the respective N-acyl derivatives (7a) and (12) with acetic anhydride. Nitrosation of 5 and 12 gives the correspond

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13

Zhou, Qishun, Bao Vu Ngoc, Grazyna Leszczynska, Jean-Luc Stigliani, and Geneviève Pratviel. "Oxidation of 5-methylaminomethyl uridine (mnm5U) by Oxone Leads to Aldonitrone Derivatives." Biomolecules 8, no. 4 (2018): 145. http://dx.doi.org/10.3390/biom8040145.

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Oxidative RNA damage is linked to cell dysfunction and diseases. The present work focuses on the in vitro oxidation of 5-methylaminomethyl uridine (mnm5U), which belongs to the numerous post-transcriptional modifications that are found in tRNA. The reaction of oxone with mnm5U in water at pH 7.5 leads to two aldonitrone derivatives. They form by two oxidation steps and one dehydration step. Therefore, the potential oxidation products of mnm5U in vivo may not be only aldonitrones, but also hydroxylamine and imine derivatives (which may be chemically more reactive). Irradiation of aldonitrone le

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14

Welchinskaya, Elena. "CHEMISTRY AND ANTITUMOUR ACTIVITY OF 5-BROMOURACILE’S DERIVATIVES." CBU International Conference Proceedings 1 (June 30, 2013): 279–85. http://dx.doi.org/10.12955/cbup.v1.45.

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Problemofthetreatmentof man’scancerandsearchoftheeffective, withalittletoxicityantitumourmedicalproducts,isonefromtheimportant taskatthecontemporaneous medicine and pharmaceutical chemistry. Chemicalmodificationofmolecularof5-bromouracilewithnextinvestigationoftoxicity and antitumour activityofits newderivativeswhichsynthesized is described. Physical-chemical, statistical pharmacological, toxicological methods were used. A strongly antitumour effect has been discovered for bis-derivative of 5-bromouracile for the first time. A new convenient methods for the preparation of new mono- and bis-der

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15

Khan, Khurshid Alam, M. Qudrat-e-Khuda, and Viqar Uddin Ahmad. "Studies on the Alkylation of 5′-CMP under Alkaline Conditions." Zeitschrift für Naturforschung B 47, no. 9 (1992): 1307–13. http://dx.doi.org/10.1515/znb-1992-0916.

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The reaction of 5′-CMP with methyl, ethyl, n-propyl and isopropyl iodides gave predominantly ribose alkylated products. Various alkylated derivatives have been characterized using UV spectroscopy, paper electrophoresis, 1H NMR and FAB (negative) mass spectroscopic techniques. Under strongly alkaline conditions the 2′-O-alkylated derivatives are synthesized in maximal yields. Isopropylation reaction gave only a small yield of the 3′-O-isopropyl derivative, this could be explained on the basis of steric hindrance offered to the bulky isopropyl group at the 2′-OH position by the heterocyclic base

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16

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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17

Brualdi, Richard A., and Geir Dahl. "Permutation Matrices, Their Discrete Derivatives and Extremal Properties." Vietnam Journal of Mathematics 48, no. 4 (2020): 719–40. http://dx.doi.org/10.1007/s10013-020-00392-5.

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AbstractFor a permutation π, and the corresponding permutation matrix, we introduce the notion of discrete derivative, obtained by taking differences of successive entries in π. We characterize the possible derivatives of permutations, and consider questions for permutations with certain properties satisfied by the derivative. For instance, we consider permutations with distinct derivatives, and the relationship to so-called Costas arrays.

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18

Nazarova, Anastasia, Pavel Padnya, Arthur Khannanov, Aleksandra Khabibrakhmanova, Pavel Zelenikhin, and Ivan Stoikov. "Towards Protection of Nucleic Acids from Herbicide Attack: Self-Assembly of Betaines Based on Pillar[5]arene with Glyphosate and DNA." International Journal of Molecular Sciences 24, no. 9 (2023): 8357. http://dx.doi.org/10.3390/ijms24098357.

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Herbicides are one of the main parts of pesticides used today. Due to the high efficiency and widespread use of glyphosate-based herbicides, the search for substances reducing their genotoxicity is an important interdisciplinary task. One possible approach for solving the problem of herbicide toxicity is to use compounds that can protect DNA from damage by glyphosate derivatives. For the first time, a method for developing DNA-protecting measures against glyphosate isopropylamine salt (GIS) damage was presented and realized, based on low-toxicity water-soluble pillar[5]arene derivatives. Two-

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19

Machida, H., S. Sakata, N. Ashida, K. Takenuki, and A. Matsuda. "In vitro Anti-Herpesvirus Activities of 5-Substituted 2′-Deoxy-2′-Methylidene Pyrimidine Nucleosides." Antiviral Chemistry and Chemotherapy 4, no. 1 (1993): 11–17. http://dx.doi.org/10.1177/095632029300400102.

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New pyrimidine deoxyribonucleoside analogues, 2′-deoxy-2′-methylideneuridine (DMDU), 2′-deoxy-2′-methylidenecytidine (DMDC), and their 5-substituted derivatives were tested for the anti-herpesvirus activities and anti-proliferative activity. E-5-(2-Bromovinyl)uracil derivative (BV-DMDU) and its cytosine congener were synthesized from 1-β-D-arabinofuranosyl- E-5-(2-bromovinyl)uracil (BV-araU). 5-Bromo, 5-iodo, 5-methyl, and 5-ethyl derivatives of DMDU and BV-DMDU showed activities against herpes simplex virus type 1 (HSV-1) and varicella-zoster virus (VZV). The corresponding DMDC derivatives ha

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20

Werfeli, Ali, Svatava Voltrová, Viktor Prutianov, and Josef Kuthan. "Optically Active Furanoids Containing Cytosine-, Adenine- and Nicotinamide-Like Moieties." Collection of Czechoslovak Chemical Communications 61, no. 8 (1996): 1223–32. http://dx.doi.org/10.1135/cccc19961223.

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3-Hydroxymethyl-5-(2,3-O-isopropylidene-β-D-erythro-furanosyl)-2-methylfuran (2) prepared from 3-ethoxycarbonyl derivative 1 was converted to 3-chloromethyl-5-(2,3-O-isopropylidene-β-D-erythro-furanosyl)-2-methylfuran (3). Compound 3 reacted with cytosine, adenine, 6-chloropurine, 6-mercaptopurine, and nicotinamide to corresponding optically active heterocyclic derivatives 5-10 and 14. The 6-chloro derivative 9 was converted to 6-alkoxy derivatives 11 and 12 by the reaction with methanol or ethanol, respectively, in the presence of diazabicyclooctane. Dithionite reduction of quaternary chlorid

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21

Ruissen, A. L. A., J. Groenink, W. Van ’t Hof, et al. "Histatin 5 and derivatives." Peptides 23, no. 8 (2002): 1391–99. http://dx.doi.org/10.1016/s0196-9781(02)00076-1.

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22

Zhong, Yi Ping, Xue Quan Zhao, Li Guan, Ping Liu, and Wen Ji Deng. "Preparation and Electrochromic Properties of Polythiophene Derivatives." Key Engineering Materials 538 (January 2013): 7–10. http://dx.doi.org/10.4028/www.scientific.net/kem.538.7.

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Polythiophene derivatives, poly(2,2′:5′,2″:5″,2″′:5″′,2″″-quinquethiophene) (P5T), poly (2,3,4,5-tetrathiopenyl-thiophene) (PX5T) and poly(1,3,5-tristhienyl-benzene) (P3TB), were prepared via the electropolymerization. The electrochromic properties of polythiophene derivative films were investigated. The results showed that P5T, PX5T and P3TB films exhibited reversible, clear colour change in liquid electrolyte on electrochemical doping and dedoping. Moreover, solid state electrochromic device, indium tin oxide (ITO)/polythiophene derivative films/conducting gel /ITO, were fabricated with poly

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23

Liepa, AJ, AJ Liepa, JS Wilkie, JS Wilkie, KN Winzenberg, and KN Winzenberg. "Preparation of Some 1-Alkyl-4-[1-(ethoxyimino)butyl]-3-hydroxy-5-oxocyclohex-3-ene-1-carboxylic Acid Ester and Amide Herbicides by Reductive Alkylation of 3,5-Dimethoxybenzoic Acid." Australian Journal of Chemistry 42, no. 8 (1989): 1217. http://dx.doi.org/10.1071/ch9891217.

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Reductive alkylation of 3,5-dimethoxybenzoic acid with haloalkanes afforded the 1-alkyl- 3,5-dimethoxycyclohexa-2,5-diene-1-carboxylic acid derivatives (3a-e) which, upon esterification and hydrolysis, furnished methyl 1-alkyl-3-hydroxy-5-oxocyclohex-3-ene-l-carboxylate derivatives (4f-j). Reaction of (4f-j) with butyric anhydride gave methyl 1-alkyl-4-butyryl- 3-hydroxy-5-oxocyclohex-3-ene-1-carboxylate derivatives (6a-e) which were converted into methyl 1-alkyl-4-[1-( ethoxyimino )butyl]-3-hydroxy-5-oxocyclohex-3-ene-1-carbo xyate derivatives (2a-e). Similarly, the oxime O-ether derivative (

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24

Iwamoto, Shintaro, Yuu Inatomi, Daisuke Ogi, et al. "New tris- and pentakis-fused donors containing extended tetrathiafulvalenes: New positive electrode materials for rechargeable batteries." Beilstein Journal of Organic Chemistry 11 (July 8, 2015): 1136–47. http://dx.doi.org/10.3762/bjoc.11.128.

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Derivatives of tris-fused TTF extended with two ethanediylidenes (5), tris- and pentakis-fused TTFs extended with two thiophene-2,5-diylidenes (6–9) were successfully synthesized. Cyclic voltammograms of the tetrakis(n-hexylthio) derivative of 5 and 7 (5d, 7d) consisted of two pairs of two-electron redox waves and two pairs of one-electron redox waves. On the other hand, four pairs of two-electron redox waves and two pairs of one-electron redox waves were observed for the tetrakis(n-hexylthio) derivative of 9 (9d). Coin-type cells using the bis(ethylenedithio) derivatives of 5 (5b), 6 (6b) and

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25

Khalifa, Nagy M., Ahmed M. Naglah, Mohamed A. Al-Omara, and Abd El-Galil E. Amr. "Synthesis and Reactions of New Chiral Linear Dipeptide Candidates Using Nalidixic Acid as Starting Material." Zeitschrift für Naturforschung B 69, no. 6 (2014): 728–36. http://dx.doi.org/10.5560/znb.2014-4031.

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A series of dipeptide heterocyclic derivatives 4-15 were synthesized using methyl 2-{[(1-ethyl- 7-methyl-4-oxo-1,4-dihydro-1,8-naphthyridin-3-yl)carbonyl]amino}-3-ethylbutanoate (3) as starting material. Treatment of 3 with L-phenylalanine methyl ester hydrochloride afforded the corresponding dipeptide methyl ester derivative 4, which was treated with hydrazine hydrate to afford the dipeptide acid hydrazide 5. Compound 5 was coupled with aldehyde and acetophenone derivatives to afford the corresponding Schiff bases 6a-f. The hydrazide derivative 5 was reacted with ethyl acetoacetate or acetone

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26

Harnden, MR, and DT Hurst. "The Chemistry of Pyrimidinethiols. III. The Synthesis of Some Substituted Pyrimidinthiols and Some Thiazolo[5,4-D]pyrimidines." Australian Journal of Chemistry 43, no. 1 (1990): 55. http://dx.doi.org/10.1071/ch9900055.

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The preparation of a number of pyrimidinethiols and (substituted) thiopyrimidines has been carried out. The reaction of 5-acetylamino-2-aminopyrimidine-4,6-diol with phosphorus penta -sulfide in pyridine gave 5-amino-2-methylthiazolo[5,4-d]pyrimidine-7-thiol which was used to prepare several additional novel pyrimidine derivatives. Hydrolysis of the 4-carboxymethylthio derivative by using 5M hydrochloric acid gave 2,5-diamino-6-mercaptopyrimidin-4-ol hy -drochloride whilst hydrolysis of 2-methyl-7-methylthiothiazolo[5,4-d]pyrimidin-5-amine gave the corresponding 4-hydroxy derivative. Several 4

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27

Asma, Noor. "In-silico analysis of tenidap and its derivative as a novel 5-lipoxygenase inhibitor." International Journal of Pharmaceutical Sciences and Developmental Research 3, no. 1 (2018): 036–38. https://doi.org/10.17352/ijpsdr.000015.

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Tenidap is a derivative of Flavonoids which are actually plant derivatives, it shows inhibition activity of 5-lipoxygenase. Molecular models were directed to discover molecular docking mode, also to help explain molecular tool behind its inhibitory action. Molecular relations of tenidap with the catalytic trio (His523, His518, Ile875) inside active or dynamic position of 5-lipoxygenase through hydrogen bonding, appears to the major reason elaborate in its substantial 5-lipoxygenase activity of inhibition.

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28

Černý, Ivan, Vladimír Pouzar, Miloš Buděšínský, Pavel Drašar та Miroslav Havel. "Epimeric 17-hydroxy derivatives of 14β-androst-5-en-3β-yl acetate". Collection of Czechoslovak Chemical Communications 55, № 10 (1990): 2510–20. http://dx.doi.org/10.1135/cccc19902510.

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A new, six-step synthesis of 3β-hydroxy-14β-androst-5-en-17-one (IX) starting from 3β-hydroxyandrost-5-en-17-one has been elaborated. Reduction of acetate X with sodium borohydride afforded 17α-hydroxy-14β-androst-5-en-3β-yl acetate (XI). The corresponding 17β-derivative XIV was obtained by epimerization of 17α-O-tosyl derivative XIII with sodium nitrite in hexamethylphosphoramide. The 13C and 1H NMR spectra of 14β-androstane derivatives are discussed.

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29

Al-Harbi, Reem A. K. "Synthesis of New Coumarin Scaffold Bearing 2-Iminochromene Moiety." Acta Chimica Slovenica 70, no. 3 (2023): 380–84. http://dx.doi.org/10.17344/acsi.2023.8016.

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Coumarin is classified as one of interesting therapeutic starting research points to obtain remarkable compounds with high efficacy. So, during this research, new 2-iminochromene derivatives bearing coumarin moiety were synthesized. At first, cyanoacetohydrazone of 3-acetylcoumarin was prepared and used as the starting material. The 2-iminochromene derivatives were synthesized through the ring closure of cyanoacetohydrazone derivative with 4-hydroxysalicylaldehyde, 5-aryldiazosalicylaldehydes, 2-hydroxynaphthaldehyde and 7-hydroxychromone-6-carboxaldehyde derivative. All of the newly synthesiz

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30

Thanki, Pragna H., Dhaval V. Hingrajiya, Jayesh J. Modha, and Jalpa H. Vadgama. "Synthesis, characterization and antibiotic evaluation of various biologically active derivatives of 4-Alkylpyrimidine-5-carbonitrile." Current Chemistry Letters 12, no. 3 (2023): 537–44. http://dx.doi.org/10.5267/j.ccl.2023.3.002.

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Extensive research work has been published on Tetrahydro and Dihydropyrimidine derivatives. Pyrimidine-5-Carbonitrile and its analogs have demonstrated a large number of activities. Some 6-Halogenosubstituted pyrimidine analogs have also been reported to be biologically active to a certain extent, but the literature survey reveals not much report on 6-alkylated pyrimidine derivatives. Targeting enhancement in biologically useful properties of a lead molecule through the association of it with active pharmacophoric groups or molecules is a conventional method in pharmaceutical research. With an

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31

Bedair, A. H., Abd El-Wahab, A. M. El-Agrody, F. M. Ali, A. H. Halawa, and G. M. El-Sherbiny. "Binary heterocyclic systems containing the ethylideneamino linkage: synthesis of some new heterocyclic compounds bearing the naphtho-[2,1-b]furan moiety." Journal of the Serbian Chemical Society 71, no. 5 (2006): 459–69. http://dx.doi.org/10.2298/jsc0605459b.

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Ethylidene hydrazine (4a,b) and thiazolidin-4-one (5) derivatives were synthesized by the reaction of ethylidenethiosemicarbazide derivative (3a) with ?-haloketone/ethyl bromoacetate, respectively. Hetrocyclization of ethylideneacetohydrazide derivative (7) with o-phenolic aldehydes gave the corresponding coumarin derivatives (8,9). The interaction of 7 with acetylacetone afforded the corresponding pyridine derivative (10). Treatment of the arylidene derivative 11b with malononitrile afforded the corresponding pyran derivative (12). The new products 3-12 were subjected to IR, 1H NMR and mass s

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32

Ahmed, Naglaa M., Ahmed H. Lotfallah, Mohamed S. Gaballah, Samir M. Awad, and Moustafa K. Soltan. "Novel 2-Thiouracil-5-Sulfonamide Derivatives: Design, Synthesis, Molecular Docking, and Biological Evaluation as Antioxidants with 15-LOX Inhibition." Molecules 28, no. 4 (2023): 1925. http://dx.doi.org/10.3390/molecules28041925.

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New antioxidant agents are urgently required to combat oxidative stress, which is linked to the emergence of serious diseases. In an effort to discover potent antioxidant agents, a novel series of 2-thiouracil-5-sulfonamides (4–9) were designed and synthesized. In line with this approach, our target new compounds were prepared from methyl ketone derivative 3, which was used as a blocking unit for further synthesis of a novel series of chalcone derivatives 4a–d, thiosemicarbazone derivatives 5a–d, pyridine derivatives 6a–d and 7a–d, bromo acetyl derivative 8, and thiazole derivatives 9a–d. All

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33

Vadla, Balakishan, Naveen Puram, and Sailu Betala. "Novel trifluoromethyl-thieno[2,3-b]pyridine-2-carboxamide and Schiff’s base derivatives and their anticancer activity." Research Journal of Chemistry and Environment 27`, no. 9 (2023): 69–74. http://dx.doi.org/10.25303/2709rjce069074.

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A series of novel trifluoromethyl-thieno[2,3-b] pyridine-2-carboxamide 3a-h and Schiff’s base derivatives 5a-g was prepared starting from 6-methyl-2-oxo-4-(trifluoromethyl)-1,2-dihydropyridine-3-carb onitrile 1. Compound 1 on reaction with bromoethyl acetate produced ester derivative 2 on reaction with different amines produced amide derivatives 3. Ester derivative 2 which on reaction with hydrazine hydrate gave hydrazide 4 derivative. Further this compound on reaction with different substituted aromatic aldehydes formed Schiff’s base derivatives 5. All the products 3a-h and 5a-f were screened

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34

Al-Ghamdi, Youssef O., Khalid A. Alamry, Mahmoud A. Hussein, Hadi M. Marwani, and Abdullah M. Asiri. "Sulfone-modified chitosan as selective adsorbent for the extraction of toxic Hg(II) metal ions." Adsorption Science & Technology 37, no. 1-2 (2018): 139–59. http://dx.doi.org/10.1177/0263617418818957.

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In this study, a new category of sulfone-modified chitosan derivatives as surface-selective adsorbents for the extraction of toxic Hg(II) metal has been synthesized in good yield. Sulfone-modified chitosan/5–20 based on variable loading of the corresponding phenacyl bromide (5, 10, 15, and 20% with respect to the original weight of the pure chitosan) was synthesized. The β-ketosulfone derivative, namely 1–(4-bromophenyl)-2-(phenylsulfonyl)ethanone, was first prepared by treatment of the corresponding phenacyl bromide with a sufficient amount of sodium benzene sulfinate; its chemical structure

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35

Ammar Ferman Abbood, Ahmed M. Abdula, and Younis Baqi. "New Benzimidazoles Bearin 2-Pyrazoline Moiety: Synthesis and Antimicrobial Activity." Journal of Wasit for Science and Medicine 14, no. 3 (2023): 1–12. http://dx.doi.org/10.31185/jwsm.401.

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A new series of 5-(1H-Benzimidazol-2-yl)-4,5-dihydro-1H-pyrazol-3-yl] derivatives (1-9) were synthesized and characterized using spectral analysis. The first step includes the reaction of benzimidazole-2-carboxaldehyde with the o,p-aminoacetophenone to obtain the chalcone derivative (1, 2). The cyclization reaction of chalcone by the hydrazine hydrate afforded compound (3, 4), which represents the starting material for Schiff base derivatives. New Schiff bases (5-6) were synthesized from the reaction of benzimidazole derivative (2) with the corresponding benzaldehydes. The azetidin-2-one (7) a

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36

Abdel-Rahman, Adel A. H., and Takeshi Wada. "Synthesis and Antiviral Evaluation of 5-(1,2,3-Triazol-1-ylmethyl)- uridine Derivatives." Zeitschrift für Naturforschung C 64, no. 3-4 (2009): 163–66. http://dx.doi.org/10.1515/znc-2009-3-402.

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Some 5-(1,2,3-triazol-1-ylmethyl)uridine derivatives were synthesized via the 1,3-dipolar cycloaddition of a 5-azidomethyluridine derivative with substituted acetylenes. The antiviral activities of these compounds against hepatitis A virus (HAV, MBB cell culture-adapted strain) and Herpes simplex virus type-1 (HSV-1) were tested.

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37

Gakovic, Andrea, Maja Djurendic-Brenesel, Evgenija Djurendic, Katarina Penov-Gasi, and Marija Sakac. "Synthesis of some 16,17-secoandrost-5-ene derivatives." Chemical Industry 64, no. 2 (2010): 81–84. http://dx.doi.org/10.2298/hemind100212009g.

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Starting from 3?-acetoxy-17-oxo-16,17-secoandrost-5-ene-16-nitrile (1), 3?-acetoxy-16,17-secoandrost-5-ene-16-nitrile (4) was synthesized by a three-stage procedure. First, the formyl group of compound 1 was reduced, to yield the alcohol 2. Compound 2 was further transformed to the mesyloxy derivative 3, whose reduction with NaBH3CN gave compound 4. Apart from compound 4 as the main reaction product, two additional products were obtained, for which the GC/MS analysis suggested that they are 8(14) and 14 derivatives of compound 4. Compound 4 was transformed into 3?-hydroxy-16,17-sesoandrost-5-e

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38

Holman, Glen, Carlos Correia, Lucian Pitt, and Akios Majoni. "The corporate use of derivatives by listed non-financial firms in Africa." Corporate Ownership and Control 11, no. 1 (2013): 671–90. http://dx.doi.org/10.22495/cocv11i1c7art5.

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This paper presents the results of an extensive analysis of derivative use by 692 companies in 20 countries across the African continent. The results show that 29% of non-financial companies in Africa use derivatives but that derivative use is dominated by firms within South Africa. The study finds that 54% of firms in South Africa use derivatives but only 5% of non-financial firms in Africa (excluding South Africa) use derivatives for hedging purposes. The majority of derivative use is directed toward the management of currency risks and the derivative instrument of choice is OTC forwards. Sw

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39

Wang, Jin, Teng-huo-sheng Liao, and Jian Yang. "Efficient synthesis of 2,3-dimethoxy-5-methyl-6-morpholinomethyl-1,4-benzoquinone hydrochloride." Zeitschrift für Naturforschung B 70, no. 4 (2015): 221–23. http://dx.doi.org/10.1515/znb-2014-0208.

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AbstractThe title compound (5) was prepared by a reaction sequence starting from 2,3,4,5-tetramethoxytoluene (1) via the Blanc reaction, oxidation and alkylation. The described method provides a good yield of the C-6 heterocyclic-substituted benzoquinone derivative and is suitable for the synthesis of other benzoquinone derivatives.

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40

S, M. HASSAN, M. KHAFAGY M., A. EMAM H., and A. EL-MAGHRABY A. "Synthesis of New 2-Substituted-pyrazolo[4',3':5,6]pyrano[3,2-e][1,2,4]triazolo[ 1,5 -c ]pyrimidine Derivatives." Journal of Indian Chemical Society Vol. 74, Jan 1997 (1997): 27–29. https://doi.org/10.5281/zenodo.5876741.

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Chemistry Department. Faculty of Science. Al-Azhar University, Nasr City, Cairo, Egypt <em>Manuscript received 3 November 1994, revised 3 April 1995 accepted 31 May 1995</em> 1,3-Diphenylpyrazol-5-one has been reacted with arylidenemalononitriles (la d) to afford pyrano[2,3-cipyrazoles (2a-d). Reaction of 2d with triethyl orthoformate gives compound 4 which on hydrazinolysis yields aminoiminopyrhnidine derivative (5) Interaction of diffeient carboxylic acid derivatives with compound 5 gives 2-substituted-1,2,4-triazolopyrimidine derivatives (6-11).

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41

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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42

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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43

M.A., METWALLY, Y. YOUSIF M., ISMAIEL A.M., and A. AMER F. "Syntheses of Some Arylsulphonyl Pyrazolines and Pyrazolones as Potential Antipyretic Analgesic Agents." Journal of Indian Chemical Society Vol. 62, Jan 1985 (1985): 54–56. https://doi.org/10.5281/zenodo.6302358.

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University of Mansoura, Mansoura, Egypt <em>Manuscript received 21 February 1984, accepted 15 August 1984</em> Treatment of 3-methyl or 3-phenyl-2-pyrazolin-5-ones (1a, b) with <em>p</em>-acetamido or <em>p</em>-methylbenzenesulphonyl chloride afforded the O-sulphonyl derivatives (3a-d). The N-sulphonyl derivative (6) and N-methyl derivative (8) were also prepared. The 3- anilino derivatives (10a-d) and 3,5-dimethylpyrazoline derivative (13) were prepared. The ir spectral data of the synthesised compounds are discussed.

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44

Novak, Oksana, Tetiana Osadcha, and Oleksandr Petruk. "CONCEPT AND CLASSIFICATION OF DERIVATIVE FINANCIAL INSTRUMENTS AS A METHODOLOGICAL PRECISION ON THEIR REGULATION IN THE FINANCIAL SERVICES MARKET." Baltic Journal of Economic Studies 5, no. 3 (2019): 135. http://dx.doi.org/10.30525/2256-0742/2019-5-3-135-144.

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The urgency of the research topic is caused by the rapid growth of capital markets and the emergence of all new financial instruments, the complexity of their structure and the transition beyond the regulatory influence of supervisory authorities. Discussion issues on the identification of derivatives, as well as their certain types, create significant problems with their valuation, the correctness of accounting, and the application of regulatory measures. Inconsistency in the interpretation of derivative financial instruments nature and their certain types is also present in domestic legal ac

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45

Sultan Alwan, Ensaf, and Rafat Milad Mohareb. "Synthesis of bioactive heterocyclic compounds using camphor." Bulletin of the Chemical Society of Ethiopia 38, no. 4 (2024): 1069–76. http://dx.doi.org/10.4314/bcse.v38i4.20.

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The aim of the work was to synthesize novel heterocyclic compounds derived from camphor with antibacterial activity. The pyridazine, xanthene, pyranothiazole, pyridinothiazole, thiophene and pyrazole derivatives were produced from 4,11,11-trimethyl-9-phenyl-7-(2-phenylhydrazono)-3,4,5,6,7,9-hexahydro-1H-1,4-methanoxanthen-8(2H)-one (1). Thiophene derivatives 6a,b were produced according to the Gewald’s reaction for thiophene synthesis. On the other hand, pyranothiazol derivatives 8a,b were synthesized by the multicomponent reactions between xanthene derivative 5, benzaldehyde and ethylcyanoace

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46

Liu, Yin-Ping, and Zhi-Bin Li. "Homotopy Analysis Method for Nonlinear Differential Equations with Fractional Orders." Zeitschrift für Naturforschung A 63, no. 5-6 (2008): 241–47. http://dx.doi.org/10.1515/zna-2008-5-602.

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The aim of this paper is to solve nonlinear differential equations with fractional derivatives by the homotopy analysis method. The fractional derivative is described in Caputo’s sense. It shows that the homotopy analysis method not only is efficient for classical differential equations, but also is a powerful tool for dealing with nonlinear differential equations with fractional derivatives.

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47

Holý, Antonín, Ivan Rosenberg, and Hana Dvořáková. "Synthesis of (3-hydroxy-2-phosphonylmethoxypropyl) derivatives of heterocyclic bases." Collection of Czechoslovak Chemical Communications 54, no. 9 (1989): 2470–501. http://dx.doi.org/10.1135/cccc19892470.

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Analogs of the antiviral 9-(S)-(3-hydroxy-2-phosphonylmethoxypropyl)adenine (HPMPA, I), containing modified heterocyclic base, were prepared from racemic or (S)-N-(2,3-dihydroxypropyl) derivatives II. Compounds II are heated with chloromethylphosphonyl dichloride (XVII), the formed chloromethylphosphonylester chlorides of compounds II react with water to give a mixture of 2'- and 3'-chloromethylphosphonyl derivatives XVIII and XIX, respectively, which on isomerization by boiling with water in the arising acidic medium affords predominantly the 3'-isomer XIX. Treatment of this isomeric mixture

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48

Shao, Jiaan, Wenteng Chen, Di Ke, Ke Shu, En Chen, and Yongping Yu. "Highly Efficient Synthesis of Polysubstituted 2-Aminopyrroles via a Multicomponent Domino Reaction." Synlett 29, no. 07 (2018): 922–27. http://dx.doi.org/10.1055/s-0036-1591907.

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A highly efficient approach to polysubstituted 2-aminopyrroles containing a coumarin derivative unit at the 5-position of the pyrrole ring was developed via a novel multicomponent domino reaction of glyoxal monohydrate derivatives, anilines, coumarin derivatives, and malononitrile. This transformation proceeded via an α-aminoketone as the key intermediate.

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49

Spassova, Maria K., Antonín Holý, and Milena Masojídková. "Ribonucleosides of 3-amino- and 3,5-diaminopyrazole-4-carboxylic acid and their open-chain analogues: Synthesis and reactions." Collection of Czechoslovak Chemical Communications 51, no. 7 (1986): 1512–31. http://dx.doi.org/10.1135/cccc19861512.

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Bis(trimethylsilyl) derivative of ethyl 3-aminopyrazole-4-carboxylate (VI) and tris(trimethylsilyl) derivative of ethyl 3,5-diaminopyrazole-4-carboxylate (VII) on reaction with 2,3,5-tri-O-benzoyl-D-ribofuranolyl chloride and subsequent debenzoylation afforded the respective β-D-ribofuranosyl derivatives VIIIa and Xa. Their alkaline hydrolysis led to 1-(β-D-ribofuranosyl)-3-aminopyrazole-4-carboxylic acid (VIIIc) and 1-(β-D-ribofuranosyl)-3,5-diaminopyrazole-4-carboxylic acid (Xb). The esters VIIIa and Xa were not ammonolyzed under normal conditions. Contrary to nucleosidation of the silyl der

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50

Sabzi, Noor Ali Hussein, and May Mohammed Jawad Al-Mudhafar. "Synthesis, characterization, and antimicrobial evaluation of new Schiff bases derived from vanillic acid conjugated to heterocyclic 4H-1,2,4-triazole-3-thiol." Pharmacia 70, no. 3 (2023): 657–63. http://dx.doi.org/10.3897/pharmacia.70.e104579.

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A multistep synthesis was established for the preparation of a new vanillic acid-1, 2, 4-1triazole-3-thiol conjugate (4). Finally, several aromatized aldehydes reacted with compound (4) to produce Schiff bases derivatives (5–11). The purpose of this research is to prepare new vanillic acid derivatives with 1, 2, 4-triazole-3-thiol heterocyclic ring structures and to evaluate their antimicrobial activity in a preliminary assessment. Fourier-transform infrared (FT-IR) and proton nuclear magnetic resonance spectroscopy (1H-NMR) were used to verify the structures of the newly synthesized compounds

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