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Relevant bibliographies by topics / Hydrazine Hydrate

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Journal articles
Dissertations / Theses
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Academic literature on the topic 'Hydrazine Hydrate'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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Journal articles on the topic "Hydrazine Hydrate"

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Al-Shiekh, Mariam A., Hanady Y. Medrassi, Mohamed H. Elnagdi, and Ebtisam A. Hafez. "Substituted Hydrazonals as Building Blocks in Heterocyclic Synthesis: A New Route to Arylhydrazonocinnolines." Journal of Chemical Research 2007, no. 7 (2007): 432–36. http://dx.doi.org/10.3184/030823407x234617.

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2-heteroylhydrazonopropanals 2a–e and 3-oxo-2-arylhydrazonopropanals 2f–k were prepared via coupling of enaminones 1 with aromatic diazonium salts. Compounds 2a–c condensed with hydrazine hydrate to yield the corresponding hydrazones 3a–c which afford on cyclisation the cinnoline derivatives 6a–c, while condensation of 2g, j with hydrazine hydrate directly yielded the pyrazole derivatives 4g–j. Condensation of 2a–c, f, g with phenyl hydrazine gave the corresponding phenyl hydrazone derivatives 7a–c, f, g. Structures of 2a, h and 3a were assessed by single crystal X-ray analyses.

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Shu, Zhang, Wang Longyu, Cao Pengzhang, Gu Xuefan, Zhang Huani, and Chen Gang. "Synthesis of New Hydrazone Compounds from Natural Grease and Investigation as Flow Improver for Crude Oil." Нефтехимия 63, no. 3 (2023): 354–62. http://dx.doi.org/10.31857/s0028242123030061.

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n this work, salicylaldehyde hydrazone (SAH), different from the traditional polymers, was synthesized from natural oils (castor, SAСH, rapeseed, SARH and soybean, SASH), hydrazine hydrate and salicylaldehyde. Firstly, natural grease reacts with hydrazine hydrate to produce hydrazide, and then salicylaldehyde reacts with hydrazide to synthesis salicylaldehyde hydrazone. In this work, SAH were evaluated as viscosity-reducers and pour point depressors for crude oil. The results show that the SAH can significantly reduce the pour point and viscosity of crude oil, with the increase of crude oil fl

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Ekram Abdullah Basheer, Kalid Matny Al-jaanaby, and Feras Shauki Al-joboury. "Synthesis a Number of Heterocyclic Compounds Derived From Levofloxacin." Tikrit Journal of Pure Science 20, no. 5 (2023): 84–95. http://dx.doi.org/10.25130/tjps.v20i5.1244.

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In this paper, the preparation a number of heterocyclic compounds five membered rings like oxadiazole, imidazolidine, thiozolidine, tetrazole, azetidine 2-on. Hydrazide (1) was synthesized from the reaction of levofloxacin with hydrazine hydrate. Hydrazone compounds (2-9) were synthesized from the reaction (1) with a number of aldehydes, and 3-acetyl-1,3,4-oxadiazol (10-17) was prepared from the reaction of hydrazones (2-9) with acetic anhydride, 5-oxo-2-aryl imadazoldine derivative (18-25) were prepared from the reaction of hydrazone derivatives (2-9) with glycine, while the reaction of hydra

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Atta-Allah, Saad R., Wael S. I. Abou-Elmagd, Kamal A. A. Kandeel, Magdy M. Hemdan, David S. A. Haneen, and Ahmed S. A. Youssef. "Synthesis and Antimicrobial Activity Evaluation of Some Novel Hydrazone, Pyrazolone, Chromenone, 2-Pyridone and 2-Pyrone Derivatives." Journal of Chemical Research 41, no. 11 (2017): 617–23. http://dx.doi.org/10.3184/174751917x15065183733150.

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A cyanoacetohydrazide derivative underwent a series of reactions with different nucleophilic reagents, such as hydrazine hydrate, p-chlorobenzaldehyde and salicylaldehyde, to give the condensation products. In addition, an arylidene malononitrile was reacted with different nitrogen nucleophiles, such as hydrazine hydrate, thiocarbohydrazide and cyanoacetohydrazide, to afford the hydrazine, hydrazone and pyridin-2-one derivatives, respectively. Furthermore, a pyridin-2-one derivative was reacted with different carbon electrophiles, such as carbon disulfide, p-chlorobenzaldehyde and acetic anhyd

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Nora, Amer Hussien, Y. Hussien Hyffaa, and H. Abdulrahman Shaymaa. "Predictive biological activity of newly synthesized hydrazone compounds derived from indomethacin." Journal of Wildlife and Biodiversity 7, Special Issue (2023): 391–402. https://doi.org/10.5281/zenodo.10246323.

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New derivatives of hydrazone have been successfully created, specifically 2-(1-(Aryl)-5-methoxy-2-methyl-1H-indol-3-yl)-N'-(2-chlorobenzylidene) acetohydrazide. The transformation of Indomethacin ester into hydrazide was achieved through a reaction with hydrazine hydrate in absolute ethanol, followed by the reaction of the resulting hydrazide with aromatic aldehydes. The structures of these newly synthesized hydrazones were validated through IR, 1HNMR, and 13CNMR analyses. Each compound's energies were optimized by utilizing density functional theory (DFT) for theoretical calculations. By empl

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Wu, Shouting, Xi Liang, Fang Luo, et al. "Synthesis, Crystal Structure and Bioactivity of Phenazine-1-carboxylic Acylhydrazone Derivatives." Molecules 26, no. 17 (2021): 5320. http://dx.doi.org/10.3390/molecules26175320.

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A phenazine-1-carboxylic acid intermediate was synthesized from the reaction of aniline and 2-bromo-3-nitro-benzoic acid. It was then esterified and reacted with hydrazine hydrate to afford phenazine-1-carboxylic hydrazine. Finally, 10 new hydrazone compounds 3a–3j were obtained by the condensation reaction of phenazine-1-carboxylic acid hydrazide and the respective aldehyde-containing compound. The structures were characterized by 1H and 13C NMR spectroscopy, MS and single crystal X-ray diffraction. The antitumor activity of the target compounds in vitro (HeLa and A549) was determined by thia

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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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ABDUL, U. SIDDIQUI, H. SIDDIQUI A., and SUNDARA RAMAIAH T. "Synthesis of Steroidal and Terpenoidal Extranucleo Thiazolidinones." Journal of Indian Chemical Society Vol. 69, Feb 1992 (1992): 85–86. https://doi.org/10.5281/zenodo.5993007.

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Department of Chemistry, Nizam College, Osmania University, Hyderabad-500 001 <em>Manuscript received 26 December 1991, accepted 17 February 1992</em> 3-Oxo-5β-cholan-24-oic-acid (la), 3-oxo-lanost-8,24-diene (2a) and 3-oxo-olean-12-ene (3a) on reaction with hydrazine hydrate in alcoholic solution gave the respective 3-hydrazones (lb, 2b and 3b). Subsequent reaction of these 3-hydrazones with ammonium thiocyanate in benzene solution afforded 3-thiosemicarbazone derivatives (lc, 2c and 3c) which undergo cyclisation with chloroacetic acid in the presence of anhydrous sodium acetate to yield

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Singh, Raman, and Anand K. Halve. "Synthesis of New Hydrazones Containing 1,3-Diketo Moiety." RSYN Chemical Sciences 02, no. 01 (2025): 01–06. https://doi.org/10.70130/rcs.2025.0201001.

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A series of novel hydrazones containing a 1,3-diketo moiety, namely 3-[(2E)-2-(4-hydroxybenzylidene)hydrazino]-3-oxo-N-phenylpropanamides (6a-j), were synthesized as precursors for biologically important β-lactam and thiazolidinone derivatives. The synthesis involved the condensation of 3-methoxy-4-hydroxybenzaldehyde or 3-methoxy-4-acetyloxybenzaldehyde with various substituted malonanilic acid hydrazides. The hydrazides (4a-e) were prepared by refluxing aniline with diethyl malonate, followed by treatment with hydrazine hydrate. The structures of the synthesized compounds were confirmed by e

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Jasril, E. Juwiyatri, S. N. Fauza, and N. Afriana. "Synthesis, in vitro Antioxidant Activity, and Toxicity Evaluation of Hydrazone Derivatives Naphthalene-1-ylmethylene hydrazine." Journal of Physics: Conference Series 2049, no. 1 (2021): 012050. http://dx.doi.org/10.1088/1742-6596/2049/1/012050.

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Abstract Hydrazone is a versatile organic compound that has a basic structure (-NHN=CH-) called the azomethine group. This structure is responsible for the physical and chemical of hydrazone, which makes this compound has variety bioactivities such as antioxidant, antitumor, and anticancer. In this work, two hydrazone derivatives from 1-naphthaldehyde and hydrazine (phenylhydrazine/hydrazine hydrate) have been synthesized under microwave irradiation. Their antioxidant activity and toxicity were evaluated by DPPH and BSLT method, respectively. Structures of the synthesized compounds were confir

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Dissertations / Theses on the topic "Hydrazine Hydrate"

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Hsu, Ivann Hong, Joanna Emerson, Andrew Wong, and Phillip Zinsli. "2-HYDROXYETHYL HYDRAZINE AND HYDRAZINE HYDRATE PLANT DESIGN." Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/192492.

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Goutelle, Véronique. "Synthèse de la 2-hydroxyéthylhydrazine par voie chloramine et par alkylation de l'(hydrate d'hydrazine) : mécanistique, modélisation cinétique et optimisation." Lyon 1, 2006. http://www.theses.fr/2006LYO10273.

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Ce travail, effectué avec la société ISOCHEM groupe SNPE, présente différentes voies d’accès à la synthèse de l’hydroxyéthylhydrazine. Cette molécule suscite aujourd’hui un grand intérêt compte tenu de ses applications dans le domaine l’aérospatiale, de la Défense, de l’industrie pharmaceutique et des cosmétiques. - La 1ère partie est consacrée à la voie Raschig. Une étude cinétique et mécanistique des réactions de formation et de dégradation a permis d’identifier les produits et d’établir un modèle. Les conditions optimales de synthèse ont été définies ainsi qu’une approche des opérations d’e

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Karakoc, Nihan. "Metal." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610393/index.pdf.

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This study aims synthesis of metal/polymer one dimensional nanostructures by micelle formation, reduction, and electrospinning route, and to analyze the morphological characteristics of composite nanofibers. The study was carried out in three main steps. First, the reverse micelle structures were established between the anionic surfactant and the metal ion. The surfactant acts as an agent to bind metal ions together so that the arrangements of metal ions can be controlled in the solution. As the surfactant concentration increases, reverse micelles grow and reverse wormlike micelle structures a

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Cinar, Simge. "Synthesis Of Silver Nanoparticles And Cable Like Structures Through Coaxial Electrospinning." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12611472/index.pdf.

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The aim of this study is to demonstrate the possibility of production of nanocables as an alternative to the other one dimensional metal/polymer composite structures like nanowires and nanorods. There is no certain definition of nanocables<br>however they could be considered as assemblies of nanowires. Nanocable structure can be defined as a core-shell structure formed by a polymeric shell and a metal core that runs continuously within this shell. To produce nanocables, two main steps were carried out. Firstly, monodispersed silver metal nanoparticles to be aligned within the cable core were p

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El, Widadi Toufik. "Etude des interactions moléculaires dans les mélanges monomethyl hydrazine liquides et solides." Lyon, INSA, 1992. http://www.theses.fr/1992ISAL0080.

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L'étude des interaction moléculaires dans les mélanges eau / monomethyl hydrazine (NNH) a été menée dans un premier temps par analyse des spectres Raman des mélanges liquides eau /MMH, dans tout le domaine de concentration. Après une ré-attribution complète des fréquences correspondant à la MMH, les variations observées sur les spectres Raman ont été expliquées en termes de déformation du squelette C-N-N de la MMH. Des raies Raman ont été attribuées aux dimères de la MMH et d'autres aux hydrates MMH, nH20. Un modèle simple de la molécule de monométhyl hydrazine a été mis au point. Il a été uti

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Amazzal, Aïssa. "Etude des associations moléculaires dans une famille de liquides fragiles : la monométhylhydrazine et ses hydrates." Lille 1, 1996. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1996/50376-1996-123.pdf.

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L'étude des associations moléculaires dans les mélanges eau-monométhylhydrazine (mmh) a été menée dans un large domaine de concentrations par l'analyse du spectre Raman des raies d'élongation N-H et O-H en fonction de la température à l'état liquide. Nous avons clairement mis en évidence la présence des liaisons hydrogène nhn et ohn responsables respectivement des associations en dimère de mmh et monohydrate de mmh. Un accord qualitatif mais significatif entre nos résultats expérimentaux et un modèle thermodynamique décrivant la variation en fonction de la concentration de la proportion corres

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Aumand, Livia M. "A Studies towards the formation of asymmetric quaternary centres via radical allylation B Applications of chiral hydrazide organocatalysts to Diels-Alder, hydride reduction, and alpha-chlorination reactions C Studies directed towards the synthesis of potential HIV-1 reverse transcriptase inhibitors: 9-Alkylaryl TIBO derivatives." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/26843.

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In part A, the attempts at synthesizing quaternary centres via radical reactions are described. Using tartrate acetals as chiral auxiliaries, tertiary bromides were submitted to radical allylation conditions in an effort to form 1,3-dicarbonyl compounds 27 possessing an asymmetric quaternary centre at C2.* Part B describes the synthesis of chiral hydrazide 129 and its ability to catalyze the Diels-Alder reaction is examined. The application of chiral hydrazides 131 to the organocatalytic hydride reduction of alpha,beta-unsaturated aldehydes and the alpha-chlorination of aldehydes is also recou

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Peng, Yao-Te, and 彭耀德. "An Investigation of the Equilibrium Characteristics of the reaction between Hydrated Hydrazine and Shell 405." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/63510084180871717730.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>93<br>Abstract 　The reaction of hydrazine and catalyst(Shell 405) can instantaneously produce a large amount of the high temperature and low-molecular weight gas. This reactive characteristics is extensively applied on the propulsion field in aeronautic and astronautic industries. In recent years, due to the fast growth of nano- and pico-satellites, the needs of micro-scale propulsion system escalate simultaneously. However, the conventional material of MEMS devices can not sustain the high temperature generated by the fast decomposition of Hydrazine. In or

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Shapiro, Pamela Joy. "Part I. Scandium Hydride and Alkyl Complexes with a Linked Monocyclopentadienyl-Amido Ligand-Framework: Single Component Catalysts for the Polymerization of α-Olefins. Part II. Hydrazido(1-) and 2,2-Dimethylhydrazido(1-) Derivatives of Permethylscandocene. Preparation and Structural Characterization of their Products from Reactions with Acetonitrile". Thesis, 1991. https://thesis.library.caltech.edu/11892/1/shapiro_pj_1991.pdf.

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<p>Various monocyclopentadienyl scandium amido derivatives with the general formulas {(η<sup>5</sup>-C<sub>5</sub>Me<sub>4</sub>)SiMe<sub>2</sub>(η<sup>1</sup>-NCMe<sub>3</sub>}ScR, (Cp*SiNR)ScR, and {(η<sup>5</sup>-C<sub>5</sub>H<sub>3</sub>CMe<sub>3</sub>)SiMe<sub>2</sub>(η<sup>1</sup>-NCMe<sub>3</sub>}ScR, (<sup>tBu</sup>CpSiNR)ScR, have been prepared. [(Cp*SiNR)(PMe<sub>3</sub>)ScH]<sub>2</sub> is prepared from the hydrogenation of (Cp*SiNR)ScCH(SiMe<sub>3</sub>)<sub>2</sub> in the presence of PMe<sub>3</sub>. The scandium hydride effects the multiple insertion of α-olefins in a controlled

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Book chapters on the topic "Hydrazine Hydrate"

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Hatib, Rustan, Khairil Anwar, Muhammad Rismanto, and Nur Wahidah Rahmadhani. "The Role of Hydrazine Hydrate in rGO to Increasing Electric Current on Dye Sensitized Solar Cell (DSSC) Based Natural Dyes." In Advances in Engineering Research. Atlantis Press International BV, 2025. https://doi.org/10.2991/978-94-6463-768-7_17.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of cobalt(II) complex with salicylaldehyde isonicotinoyl hydrazone (hydrated)." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53971-2_492.

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"Hydrazine Sulfate and Alcoholic Hydrazine Hydrate." In Small-Scale Synthesis of Laboratory Reagents with Reaction Modeling. CRC Press, 2011. http://dx.doi.org/10.1201/b10611-12.

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Stanovnik, B., and J. Svete. "From Pyrimidines and Hydrazine Hydrate." In Five-Membered Hetarenes with Two Nitrogen or Phosphorus Atoms. Georg Thieme Verlag KG, 2002. http://dx.doi.org/10.1055/sos-sd-012-00191.

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Stanovnik, B., and J. Svete. "From 1,2,6-Thiadiazines and Hydrazine Hydrate." In Five-Membered Hetarenes with Two Nitrogen or Phosphorus Atoms. Georg Thieme Verlag KG, 2002. http://dx.doi.org/10.1055/sos-sd-012-00195.

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Aitken, R. A. "Reaction of Selenobenzamides with Hydrazine Hydrate." In Five-Membered Hetarenes with Three or More Heteroatoms. Georg Thieme Verlag KG, 2004. http://dx.doi.org/10.1055/sos-sd-013-01343.

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Comasseto, J. V., and A. S. Guarezemini. "Reaction of Dialkyl Diselenides with Hydrazine Hydrate Followed by Chlorotriethylstannane." In Sulfur, Selenium, and Tellurium. Georg Thieme Verlag KG, 2008. http://dx.doi.org/10.1055/sos-sd-039-01230.

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Feng, Xiao, Junkun Yang, and Taofeng Cao. "Improving Energy Performance of a Hydrazine Hydrate Plant by Applying Hot Feed." In Computer Aided Chemical Engineering. Elsevier, 2009. http://dx.doi.org/10.1016/s1570-7946(09)70394-3.

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Stanovnik, B., and J. Svete. "From Carbonyl Compounds and Alkyl Formate Followed by Reaction with Hydrazine Hydrate." In Five-Membered Hetarenes with Two Nitrogen or Phosphorus Atoms. Georg Thieme Verlag KG, 2002. http://dx.doi.org/10.1055/sos-sd-012-00015.

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Döpp, H., and D. Döpp. "Condensations of 3-Diazo-2-oxopropanoic Acid Derivatives with Hydrazine Hydrate or Hydroxylamine." In Six-Membered Hetarenes with Two Unlike or More than Two Heteroatoms and Fully Unsaturated Larger-Ring Heterocycles. Georg Thieme Verlag KG, 2004. http://dx.doi.org/10.1055/sos-sd-017-00357.

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Conference papers on the topic "Hydrazine Hydrate"

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Popusoi, Ana, Nicanor Barba, and Aurelian Gulea. "Synthesis of 1,3-Phenyl(Pyridyl)propenones with thiosemicarbazidic groups." In Scientific seminar with international participation "New frontiers in natural product chemistry". Institute of Chemistry, Republic of Moldova, 2023. http://dx.doi.org/10.19261/nfnpc.2023.ab03.

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The bibliographic study of chalcones of the type 1,3-aryl(heteryl)propen-2-one with thiosemicarbazidic 4- and 1,4-disubstituted and thisemicarbazonic groups respectively gives us the information that they have a wide spectrum of biological activity, but methods of their synthesis are less described in the literature, and they became our object of study. 4,5-Dihydro-1-H-(pyrazol-3-yl)phenylhydrazinecarbothioamides 3a and 3b were obtained according to the following scheme:Reagents and reaction conditions: i, ii) 2-Py, 25oC – 24h, 90-95oC – 3h, 77-82%; iii) DMF, CH3COOH, 70-80oC, 2-3h, 60-63%. Fi

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Zveaghinteva, Marina, Natalia Sucman, and Fliur Macaev. "Preparation of pyrazole class derivatives by heterocyclization of 1,2,4-triazolylethanones." In Conferința științifică națională cu participare internațională "Integrare prin cercetare și inovare", dedicată Zilei Internaționale a Științei pentru Pace și Dezvoltare. Moldova State University, 2025. https://doi.org/10.59295/spd2024n.93.

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In this work the peculiarities of the heterocyclization reaction of vinyltriazoles with the participation of hydrazine hydrate in ethanol and acetic acid are considered. Within the framework of this work it was found that the nature of the formed reaction products of the interaction of vinyltriazoles with hydrazine hydrate depends on the nature of the solvent. In boiling ethanol, 4,5-dihydro-1H-pyrazolinfunctionalized 1H-1,2,4-triazole is formed. Under acetic acid conditions, along with the formation of a pair of diastereomeric substances 4,5-dihydro-1H-pyrazoline series diastereomeric substan

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Solanki, Rekha Garg, and P. Rajaram. "Structural and optical properties of hydrazine hydrate capped cadmium sulphide nanoparticles." In 2ND INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5032353.

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Chen, H. M., F. Fang, Z. M. Zhou, M. M. Li, T. R. Long, and J. S. Guo. "Recycling of waste engine oil using hydrazine hydrate as a decolorizing agent." In International Conference on Earth Science and Environmental Protection (ICESEP2013). WIT Press, 2013. http://dx.doi.org/10.2495/icesep131011.

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Jiangbo, Liang, Ling Zhang, Jianhui Guo, et al. "Technical Studies on Hazardfree Treatment and Resource Recovery of Hydrazine Hydrate Solid Waste." In 2013 Third International Conference on Intelligent System Design and Engineering Applications (ISDEA). IEEE, 2013. http://dx.doi.org/10.1109/isdea.2012.328.

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Yusof, Muhammad Jefri Mohd, Naharullah Jamaluddin, Ibrahim Abdullah, and Siti Fairus M. Yusoff. "Hydrogenation of liquid natural rubber via diimide reduction in hydrazine hydrate/hydrogen peroxide system." In THE 2015 UKM FST POSTGRADUATE COLLOQUIUM: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2015 Postgraduate Colloquium. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4931280.

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Zainuddin, Mohammad Fiqri, Nik Raikhan Nik Him, Nur Hidayati Othman, Mohamad Sufian So’aib, and Wan Fazlida Hanim Abdullah. "Review on effects of hydrazine hydrate and L-ascorbic acid on electrical conductivity of graphene." In ADVANCED MATERIALS FOR SUSTAINABILITY AND GROWTH: Proceedings of the 3rd Advanced Materials Conference 2016 (3rd AMC 2016). Author(s), 2017. http://dx.doi.org/10.1063/1.5010522.

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Krunić, Mihajlo J., Jelena Z. Penjišević, Slađana Kostić-Rajačić, Vladimir B. Šukalović, Deana B. Andrić, and Ivana I. Jevtić. "Pyrazole/tacrine derivatives as potential cholinesterase inhibitors." In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.567k.

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Two new tacrine/pyrazole conjugates were designed, synthesized, and pharmacologically evaluated for their inhibitory activity toward acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE). A scalable and cost-efficient synthetic route was developed, and key reaction steps for the synthesis of compounds 4a,b were nucleophilic substitution of α-aroylketene dithioacetals with tacrine intermediates, followed by cyclocondensation of respective N,S-acetals with hydrazine hydrate. The preliminary pharmacological evaluation revealed high inhibitory activities of 4a,b toward AChE (180 and 259 nM

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