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Journal articles on the topic 'Hydrazine hydrat'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Ibtehal K. Abdullah and Meaad K. Buniya. "Preparation and Identification of some heterocyclic compounds from cyano compounds." Tikrit Journal of Pure Science 20, no. 5 (2023): 96–105. http://dx.doi.org/10.25130/tjps.v20i5.1245.

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This article included prepared cyano acetic acid hydrazid from interaction cyano ethylacetate with hydrate hydrazen, and interaction with 2- acytel thiophene and 2- acytelpyridine it will formation of hydrazide- hydrazone derivative (I, II), and through the undergo the compounds (I,II) for chain of interactions with different chemical materials then enclosed cyclo formed derivative of (arylidene ,coumarin , aryl hydrazon , thiophene ) . Prepared compounds have been studied and Identification by physical and spectral means.

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2

Journal, Baghdad Science. "Synthesis and study of biological activity of some new Imidazole derivatives." Baghdad Science Journal 13, no. 3 (2018): 547–55. http://dx.doi.org/10.21123/bsj.13.3.547-555.

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In this work ester derivatives were synthesized by the reaction of imidazole derivatives (C1) with ethylchloroacetate in ethanol and NaOH to give the corresponding (C2) .While compound (C3) acetohydrazide was synthesized by the reaction of ester derivatives (C2) with hydrazine hydrat in ethanol. Compound (C3) from the reaction with different aromatic aldehydes in absolute ethanol gave the Schiff′s bases (C4,C5). The product compounds were characterized by FT-IR, U.V and 1HNMR spectra and the biological activities were studied as antibacterial.

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3

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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4

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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5

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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6

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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7

Agili, Fatimah. "Novel Hydrazide Hydrazone Derivatives as Antimicrobial Agents: Design, Synthesis, and Molecular Dynamics." Processes 12, no. 6 (2024): 1055. http://dx.doi.org/10.3390/pr12061055.

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Ester 2 was produced by reacting thiourea derivative 1 with ethyl 2-chloro-3-oxobutanoate in MeOH containing piperidine. Hydrazide 3 was produced by reacting the latter ester with hydrazine hydrate in EtOH at reflux. By reacting hydrazide 3 with aromatic/heterocyclic aldehydes, twelve derivatives of hydrazide hydrazone 5a–l were produced. Spectral measurements and elemental analysis verified the molecular structure. Compounds 2, 5a, 5c, 5d, and 5f had strong effects on all the pathogenic bacterial strains according to an evaluation of the antimicrobial qualities of the synthetic compounds. Wit

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8

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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9

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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10

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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11

Shah, Shalini K., and Anju Goyal. "Synthesis and Biological Evaluation of Some Novel Arylidene Hydrazides Derivatives." Asian Pacific Journal of Health Sciences 9, no. 4 (2022): 203–9. http://dx.doi.org/10.21276/apjhs.2022.9.4s.39.

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There has been considerable interest in the development of novel compounds with anticonvulsant, antioxidant, antibacterial, and antifungal activities. The present study explores the antimicrobial activity of some new arylidene hydrazide derivatives and correlates the effect on the antimicrobial potency by varying the substituents on hydrazide part of the arylidine hydrazide. Hydrazones possessing an azomethine–NHN=CH- proton constitute an important class of compounds for new drug developments; therefore, a series of arylidene hydrazides were synthesized with various aromatic aldehydes/ketones.

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12

Rai, K. M. Lokanatha, K. B. Umesha, and M. A. Harish Nayaka. "Antioxidant and Antimicrobial Activity of 5-methyl-2-(5-methyl-1,3-diphenyl-1H-pyrazole-4-carbonyl)-2,4-dihydro-pyrazol-3-one." International Journal of Biomedical Science 5, no. 4 (2009): 359–68. http://dx.doi.org/10.59566/ijbs.2009.5359.

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Cycloaddition of nitrile imines 4 generated in situ by the catalytic dehydrogenation of diphenyl hydrazones 3 using Chloramine-T (CAT) as oxidant in glacial acetic acid with enolic form of ethyl acetoacetate 5 afforded Ethyl 3-aryl-5-methyl-1-phenyl-1H-pyrazol-4-carboxylate 6 in 80% yield. The said pyrazoles 6 refluxed with 80% hydrazine hydrate using absolute alcohol as solvent for about 2-3 hours to produce the respective 5-methyl-1,3-diphenyl-1H-pyrazole-4-carboxylic acid hydrazide 7. The alcoholic solution of pyrazole acid hydrazides on heating with ethyl acetoacetate 5 to give the 5-methy

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13

Edrees, Mastoura M. "Synthesis of 4-hydrazinopyrazolo[3,4-d]pyrimidines and their Reactions with Carbonyl Compounds." Journal of Chemical Research 37, no. 1 (2013): 6–10. http://dx.doi.org/10.3184/174751912x13543818811749.

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Synthesis of a new 4-hydrazinopyrazolo[3,4- d]pyrimidine was achieved via heating (4,6-dithioxo-1 H-pyrazolo[3,4- d] pyrimidin-3-yl)acetonitrile with hydrazine hydrate. Reactions of the latter product with thiophene-2-carbaldehyde and ethyl hydrazonoacetoacetate analogues afforded the corresponding hydrazone and pyrazole derivatives, respectively. Similarly, condensation of 2-[6-(benzylsulfanyl)-4-hydrazino-1 H-pyrazolo[3,4- d]pyrimidin-3-yl]acetonitrile with thiophene-2-carbaldehyde and ethyl hydrazonoacetoacetate analogues gave the respective hydrazone and pyrazolone derivatives. Alkylation

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14

Ashry, El Sayed H. El, El Sayed Ramadan, Hamida Abdel Hamid, and Mohamed Hagar. "Microwave Irradiation for Enhancing the Regioselective Synthesis of 6H-indolo[2,3-b]quinoxalines." Journal of Chemical Research 2005, no. 4 (2005): 229–32. http://dx.doi.org/10.3184/0308234054213483.

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Microwave irradiation (MWI) promotes the regioselective synthesis of 6H-indolo[2,3-b] quin oxaline (5) by condensation of isatin (1) with o-phenylenediamine. Ethyl indolo [2,3-b] quinoxaline-6-acetate (8) was prepared via the carbethoxymethylation of 5, or from the reaction of N-(ethoxycarbonylmethyl)isatin (6) with o-phenylenediamine under MWI. The reaction of 8 with hydrazine hydrate afforded the hydrazide 9, whose condensation with aromatic aldehydes and monosaccharides gave the hydrazones 10a–d.

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15

S., EL-BAHAEI, E. BAYOUMY E., and YOUSSIF SH. "Synthesis of some New Thienopyrimidines containing 4-Thiazolidinone Moiety." Journal of Indian Chemical Society Vol. 65, Oct 1988 (1988): 695–98. https://doi.org/10.5281/zenodo.6076748.

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Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt <em>Manuscript received 18 February 1988, accepted 8 July 1988</em> The reaction of 4-mercaptopyrimidines (1) with halogenated active methylene in aqueous sodium carbonate gave compounds 2. Compound 2c, g were allowed to react with hydrazine hydrate in ethanolts give the acid hydrazides (4a, b). The latter were condensed with aromatic aldehydes and ketones to give the corresponding hydrazones (5). Cyclocondensation of thioglycolic acid on the hydrazones (5) gave the thiazoli-dinothienopyrimidines (6).

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16

Journal, Baghdad Science. "Synthesis of New Heterocyclic Derivatives from 4-(3, 5-Dimethyl-1-phenyl-1H-pyrazol-4-ylazo)- benzoic acid." Baghdad Science Journal 7, no. 1 (2010): 727–36. http://dx.doi.org/10.21123/bsj.7.1.727-736.

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In this work pyrazolin derivatives were prepared from the diazonium chloride salt of 4-aminobenzoic acid. Azo compounds were prepared from the reaction of an ethanolic solution of sodium acetate and calculated amount of active methylene compound namely, acetyl acetone to obtain the corresponding hydrazono derivative (1). Cyclocondensation reaction of compounds (1) with hydrazine hydrate and phenyl hydrazine in boiling ethanol affording the corresponding pyrazoline-5-one derivatives of 4-aminobenzoic acid (2,3). Then compound (3) was reacted with thionyl chloride to give the corresponding acid

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17

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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18

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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19

Shakir, Raied Mustafa, Shaimaa Abed Saoud, and Dhuha Faruk Hussain. "Synthesis, Antibacterial, and Molecular Docking Study of Novel 2-Chloro-8-Methoxy-3-Aryl-[1,3] Benzoxazine Derivatives using Vilsmeier Reagent." International Journal of Drug Delivery Technology 10, no. 03 (2020): 487–98. http://dx.doi.org/10.25258/ijddt.10.3.32.

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Reducing of ethyl 4-((2-hydroxy-3-methoxybenzylidene)amino)benzoate (1) afford ethyl 4-((2-hydroxy-3-methoxybenzyl)amino)benzoate (2). Reaction of this compound with Vilsmeier reagent affords novel 2-chloro-[1,3] benzoxazine ring (3). The corresponding acid hydrazide of compound 3 was synthesized from reaction of compound (3) with hydrazine hydrate. Newly series of hydrazones (5a–i) were synthesized from reaction of acid hydrazide with various aryl aldehydes. Antibacterial activity of the hydrazones was secerned utilizing gram-negative and gram-positive bacteria. Compound (5b) and (5c) exhibit

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20

Hossain, M. I., and M. M. H. Bhuiyan. "Synthesis and Antimicrobial Activities of Some New Thieno and Furopyrimidine Derivatives." Journal of Scientific Research 1, no. 2 (2009): 317–25. http://dx.doi.org/10.3329/jsr.v1i2.2299.

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Fused pyrimidines, 8,9-dimethyl[1,2,4]triazolo[4,3-c]thieno[3,2-e]pyrimidine 5, 3,8,9-trimethyl[1,2,4]triazolo[4,3-c]thieno[3,2-e]pyrimidine 6, 4-benzylidinehydrazono-5,6 dimethylthieno[2,3-d]pyrimidine 7, 4-[4/-hydroxybenzylidine]hydrazono-5,6-dimethylthi-eno[2,3-d]pyrimidine 8, 4-[4/-tolylidin]hydrazono-5,6-dimethylthieno[2,3-d]pyrimidine 9, 4-[4/-nitrobenzylidine]hydrazono-5-ethyl-6-methylthieno[2,3-d]pyrimidine 10 and 4-[4/-chlorobenzylidine]hydrazono-5-ethyl-6-methylthieno[2,3-d]pyrimidine 11 are prepared in good yield by an initial treatment of 2-amino-4,5-dimethylthiophene-3-carbonitril

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21

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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22

Peng, Seng, Xiao Bin Tang, Hao Wang, Yan Wei, and Gang Chen. "Preparation of Poly-Hydrazide and Use as Pour Point Depressor for Heavy Oil." Materials Science Forum 943 (January 2019): 135–40. http://dx.doi.org/10.4028/www.scientific.net/msf.943.135.

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To develop new pour point depressor, in this work, a poly-hydrazide is designed and prepared from vegetable oil, hydrazine hydrate and epichlorohydrin. The effectiveness of the poly-hydrazides on four crude oils was tested as pour point depressants as well as paraffin inhibiters. The results showed that the highest pour point reduction depression was achieved as 9.8°C with 2000ppm PH3O-3 in 2# crude oil. Below the pour point of the crude and processed oils, paraffin crystals will deposit and tend to plug flow lines and filters. The saturated hydrocarbons were separated, and the paraffin crysta

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23

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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24

KRISHNA, C. JOSHI, DANOIA ANSHU, S. SHARMA C., and JOSHI RAHUL. "Investigation of the Reaction of Fluorine containing 1,3-Dihydro-3-( 1 ,5-dihydro-3-methyl-5-oxo-1-phenyl-4Hpyrazol- 4-ylidene )-2H-indol-2-one with Hydrazine Derivatives." Journal of Indian Chemical Society Vol. 71, June-Aug 1994 (1994): 459–62. https://doi.org/10.5281/zenodo.5895738.

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<em>Department of Chemistry. University of Rajasthan, Jaipur-302 004 Manuscript received 1 December 1993</em> The reaction of 1,3-dihydro-3-(1,5-dihydro-3-methyl-5-oxo-1-phenyl-4<em>H</em>-pyrazol-4-ylldene)-2<em>H</em>-indo 1-2-ones (3a-d) with various hydrazines has been studied in the absolute ethanol/glacial acetic acid medium. Reaction of 3a-c with phenyl hydrazine in absolute ethanol gave exclusively spiro compounds (64-76%), while in glacial acetic acid, a mixture of spiro compound (18-'7%), hydrazones (14-25%) and a condensed compound (22-33%) was formed. 3 however gave only t

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25

Le, Trong Duc, Ngoc Nam Pham, and Tien Cong Nguyen. "Preparation and Antibacterial Activity of Some New 4-(2-Heterylidenehydrazinyl)-7-chloroquinoline Derivatives." Journal of Chemistry 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/4301847.

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N-(4-Substituted phenyl)acetamides, which were prepared from acetic anhydride and p-substituted anilines, were utilized as precursors for reactions to Vilsmeier-Haack reagent to form 6-substituted-2-chloroquinoline-3-carbaldehydes 3a–c. Meanwhile, a similar reagent was applied to 1-[1-(4-substituted phenyl)ethylidene]-2-phenylhydrazines as substrates, which were synthesized from phenylhydrazine hydrochloride and p-substituted acetophenones, and 1,3-diarylpyrazole-4-carbaldehydes 3d–f were observed as a result. Reactions between the aldehydes 3a–f and 7-chloro-4-hydrazinylquinoline 2, obtained

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26

Salih Mohammed Ismail, Ihmood Kh. Jebur, and Fadhal D. Khalid. "Synthesis of some new 2-mercaptobenzoxazol and study their biological activity against some plant pathogenic fungi." Tikrit Journal of Pure Science 21, no. 3 (2023): 67–75. http://dx.doi.org/10.25130/tjps.v21i3.998.

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The research included synthesis of 2-mercapto benzoxazole (MBO) (1) ) from the reaction of ortho hydroxyl aniline with carbon disulfide in ethanolic potassium hydroxide. The hydrazine benzoxazole HMBA2 (2) was synthesized from the reaction of compound MBO (1) with hydrazine hydrate in presence of alcohol. Compounds (3(a- e)) were synthesized by condensate on of substituted Benzaldehydes with 2-Hydrazino benzoxazole HMBA2. The Ethyl2-(benzoxazolylthio) acetate EMBA1 (4) obtained from the reaction of compound MBO (1) with solution of ethyl chloro acetate using KOH alcoholic .Finally the compound

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27

Dzhumadullaeva, S. A., A. B. Bayeshov, and A. V. Kolesnikov. "STUDY OF THE CATALYTIC HYDRAZINOLYSIS OF HIGHER FATTY ACIDS." SERIES CHEMISTRY AND TECHNOLOGY 2, no. 440 (2020): 56–61. http://dx.doi.org/10.32014/2020.2518-1491.23.

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In this work, the reaction of hydrazinolysis of higher fatty acid in the presence of an ionite catalyst is considered for the first time. Synthetic commodity anion exchange resin AB-17-8 was used as a catalyst. Before use, the anionite was converted to OH-form and its exchange capacity was determined. The experiments were made in the static conditions in a glass reactor with mixing of the reaction mixture.The reaction of palmitic acid with hydrazine yielded the corresponding hydrazide. The influence of various factors (quantity of hydrazine hydrate, catalyst, butyl alcohol, temperature, reacti

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28

Prashant, S. Shinge, G. Mallur Shanta, and V. Badami Bharati. "Termolecular one-pot synthesis of symmetrical azines of 4-acetyl-3-arylsydnones. Hydrazone and azine derivatives of 4-acetyl-3-arylsydnones, their spectral characterization and biological properties." Journal of Indian Chemical Society Vol. 82, Jul 2005 (2005): 659–64. https://doi.org/10.5281/zenodo.5830581.

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P.G. Department of Chemistry, Karnatak University, Dharwad-580 003, India <em>E-mail</em> : bbadami @rediffimail.com <em>Manuscript received 9 June 2004. revised 18 December 2004, accepted 22 March 2005</em> Hydrazones of 4-acetyl-3-arylsydnones (2a-o) were prepared by heating 4-acetyl-3-arylsydnones (1a-o) with excess of hydrazine hydrate and the corresponding symmetrical azines (3a-o) were obtained by a termolecular reaction of 4-acetyl-3- arylsydnones with hydrazine hydrate (2 : 1 ratio). Hydrazones and azines were screened for their antimicrobial activity and few of these compounds exhibit

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29

A., H. SIDDIQUI, VENKATESHWER RAO K., and VIJAYASENA REDDY K. "Synthesis of Steroidal Extranucleo N-Phenyloxazolidones of Androstane Series." Journal of Indian Chemical Society Vol. 65, Dec 1988 (1988): 850–51. https://doi.org/10.5281/zenodo.6089596.

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Department of Chemistry, Nizam College, Hyderabad-500 001 <em>Manuscript received 13 May 1988, accepted 23 August 1988</em> 17-Oxo-5-androsten-3\(\beta\)-yl acetate (1a) and 3\(\beta\) -chloro-17-oxo-5-androstene (2a) on reaction with hydrazine hydrate in alcoholic solution gave 5-androsten-17-hydrazone-3\(\beta\) -yl acetate (1b) and 3\(\beta\) -chloro-5-androsten-17-hydrazone (2b), respectively. The subsequent reaction of these 17-hydrazones (1b, 2b) with phenyl isocyanate in benzene solution afforded the corresponding 17-<em>N</em>-pbenylsemlcarbazone derivatives (1c, 2c

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30

Tzankova, Diana, Hristina Kuteva, Emilio Mateev, et al. "Synthesis, DFT Study, and In Vitro Evaluation of Antioxidant Properties and Cytotoxic and Cytoprotective Effects of New Hydrazones on SH-SY5Y Neuroblastoma Cell Lines." Pharmaceuticals 16, no. 9 (2023): 1198. http://dx.doi.org/10.3390/ph16091198.

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A series of ten new hydrazide–hydrazone derivatives bearing a pyrrole ring were synthesized and structurally elucidated through appropriate spectral characteristics. The target hydrazones were assessed for radical scavenging activity through 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) tests, with ethyl 5-(4-bromophenyl)-1-(2-(2-(4-hydroxy-3,5-dimethoxybenzylidene)hydrazine-yl)-2-oxoethyl)-2-methyl-1H-pyrrole-3-carboxylate (7d) and ethyl 5-(4-bromophenyl)-1-(3-(2-(4-hydroxy-3,5-dimethoxybenzylidene) hydra zine-yl)-3-oxopropyl)-2-methyl

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31

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

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

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32

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

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

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33

Drev, Miha, Uroš Grošelj та Jurij Svete. "Transformations of β-aryl-N-Cbz-α,β-didehydro-α-amino esters with hydrazine hydrate". Zeitschrift für Naturforschung B 71, № 6 (2016): 623–31. http://dx.doi.org/10.1515/znb-2015-0221.

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AbstractCyclizations of Cbz-protected α,β-didehydro-β-arylalanine esters 1 with excess hydrazine hydrate afforded mixtures of the expected 3-pyrazolidinones 2 and the unexpected 1-amino-5-benzylidenehydantoins 6 and N-Cbz-β-arylalanine hydrazides 7. Presumably, the pyrazolidinones 2 and hydantoins 6 are formed as primary products via competitive 1,2- and 1,4-addition of hydrazine hydrate followed by cyclization, whereas β-arylalanine hydrazides 7 are formed as secondary products via reductive cleavage of the C(5)–N(1) bond in pyrazolidinones 2. The overall selectivity depends on the reaction t

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34

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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35

Dzhumadullaeva, S. A., A. B. Bayeshov, and A. V. Kolesnikov. "THE KINETICS OF SELECTIVE HYDRAZINOLYSIS OF MALEIC ACID ON THE ACID CATALYST." SERIES CHEMISTRY AND TECHNOLOGY 2, no. 446 (2021): 53–57. http://dx.doi.org/10.32014/2021.2518-1491.26.

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For the first time, kinetics and the mechanism of the reaction of hydrazinolysis of maleic acid in the presence of cation exchanger resin KU-2-8 in H-form have been studied. The experiments were carried out in a static system in a thermostat glass reactor. It was found that cation exchanger shows high catalytic activity in the studied process - maleic acid conversion was 93%, and maleic hydrazide yield was 90%. The conversion selectivity of maleic acid to maleic hydrazide was 97,8%. The reaction rate was determined from the accumulation of maleic hydrazide. The apparent reaction rate constant

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36

M. Samir, E., and R. M. Mohareb. "Novel synthesis of pyran-3-hydrazide derivatives and their uses to the synthesis hydrazide-hydrazone, pyrazole and thiazole derivatives with anticancer activities." Bulletin of the Chemical Society of Ethiopia 35, no. 3 (2022): 573–86. http://dx.doi.org/10.4314/bcse.v35i3.9.

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ABSTRACT. The multi-component reaction of ethyl acetoacetate with each of malononitrile (3) benzaldehyde (1) in ethanol containing triethylamine gave the ethyl 6-amino-5-cyano-2-methyl-4-phenyl-4H-pyran-3-carboxylate (4). The latter compound reacted with hydrazine hydrate to give the hydrazide derivative 6. Compound 6 underwent a series of hetero-cyclization reactions to give pyrzole, hydraide-hydrazone, thiazole derivatives. The produced compounds tested against cancer cell lines six cancer cell lines and showed that compounds 8b, 10b, 11a, 17a, 21 and 24a were the most cytotoxic compounds. F

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37

Nurhan G mr k o lu, Nurhan G. mr k. o. lu, and Muhammad Imran and Inam Iqbal Muhammad Imran and Inam Iqbal. "Synthesıs and Characterızatıon of New Trıazole and Coumarın-Derived Heterocyclıc Compounds Part I." Journal of the chemical society of pakistan 41, no. 6 (2019): 1097. http://dx.doi.org/10.52568/000830/jcsp/41.06.2019.

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Synthesis of ethyl ester of acetic acid containing 5-oxo-[1,2,4] triazole ring (2) was achieved by the condensation of 3-substituted-4-amino-1H-1,2,4-triazol-5(4H)-one (1) with ethyl bromoacetate in basic medium. Compound 2, was then further reacted with hydrazine hydrate to form acid hydrazide, which is 2-(4-amino-3-substituted-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)acetohydrazide (3). Compound 3 was later treated with three different diverse coumarin aldehydes (6, 12, 18) resulted in the formation of arylidene hydrazides as cis–trans conformers (7, 8, 13, 14, 19, 20). In conclusion, we synt

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38

Aouad, Mohamed Reda, Mouslim Messali, Nadjet Rezki, Adeeb Al-Sheikh Ali, and Alain Lesimple. "Synthesis and characterization of some novel 1,2,4-triazoles, 1,3,4-thiadiazoles and Schiff bases incorporating imidazole moiety as potential antimicrobial agents." Acta Pharmaceutica 65, no. 2 (2015): 117–32. http://dx.doi.org/10.1515/acph-2015-0011.

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Abstract (1,4,5-Triphenylimidazol-2-yl-thio)butyric acid hydrazide (3) was obtained via alkylation of 1,4,5-triphenylimidazol-2- thiol (1) with ethylbromobutyrate, followed by addition of hydrazine hydrate. Treatment of acid hydrazide 3 with carbon disulfide in an ethanolic potassium hydroxide solution gave the intermediate potassium dithiocarbazinate salt, which was cyclized to 4-amino-5-[(1,4,5-triphenylimidazol- -2-yl)thiopropyl]-2H-1,2,4-triazole-3-thione (4) in the presence of hydrazine hydrate. Condensation of compound 3 with alkyl/arylisothiocyanate afforded the corresponding 1-[4-(1,4,

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39

Ghochikyan, Tariel V., Armen S. Galstyan, and Melanya A. Samvelyan. "A NEW METHOD FOR THE PREPARATION OF HYDRAZIDES OF SUBSTITUTED GAMMA-HYDROXYBUTANOIC ACIDS." Proceedings of the YSU B: Chemical and Biological Sciences 57, no. 2 (261) (2023): 68–76. http://dx.doi.org/10.46991/pysu:b/2023.57.2.068.

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A method providing a high yield (80–94%) for producing gamma-hydroxy-butanoic acids hydrazides by the interaction of various representatives of cyclic esters with 85% hydrazine hydrate has been elaborated. It has been established that the introduction of a gamma-hydroxypropyl residue into the hydrazides composition results in new biological properties.

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40

Sarma, K. Narasimha, M. C. S. Subha, and K. Chowdoji Rao. "A Facial Synthesis and Antimicrobial Activity of Some Pyrazole Derivatives Carrying Indole." E-Journal of Chemistry 7, no. 3 (2010): 745–50. http://dx.doi.org/10.1155/2010/979401.

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The title compounds (7a-h) were prepared by esterification of indole-5-carboxylic acid (1) and subsequent treatment with hydrazine hydrate in methanolviathe hydrazide (3). Finally hydrazide (3) condensed with different substituted aldol (6) in acetic acid / PTSA catalytic media produced (3,5-subsituted-4,5-dihydropyrazol-1-yl)(1H-indol-5-yl)methanone (7a-h) in good yields. All the newly synthesized compounds are by elemental analysis and spectral studies and evaluated for antimicrobial activities.

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41

Ristić, Milenko, Biljana Dekić, Niko Radulović, and Marija Aksić. "Synthesis, complete assignment of 1H- and 13C-NMR spectra and antioxidant activity of new azine derivative bearing coumarin moiety." Bulletin of Natural Sciences Research 11, no. 1 (2021): 9–16. http://dx.doi.org/10.5937/bnsr11-31265.

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In this research, the synthesis of a new azine derivative with coumarin moiety was performed in three reaction steps, starting from 4-hydroxycoumarin. The first step in synthesis was the acetylation of 4-hydroxycoumarin to yield 3-acetyl-4-hydroxycoumarin and then the obtained 3-acetyl-4-hydroxycoumarin was reacted with hydrazine hydrate and give a corresponding hydrazone. Condensation of the hydrazone with 4-ethoxy-3methoxybenzaldehyde afforded the target compound 1-[1-(4-hydroxy-2-oxo-2H-chromen-3-yl)-ethylidene]-2-(4etoxy-3-methoxybenzylidene)-hydrazine in a good yield. The resulting azine

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42

Shiryaev, A. K., A. M. Gulyaeva, V. A. Shiryaev, and U. M. Aristova. "Synthesis of [(4-methyl-6-oxo-1,6-dihydropyrimidin2-yl)sulfanyl]acetamides." Журнал органической химии 59, no. 4 (2023): 547–52. http://dx.doi.org/10.31857/s0514749223040146.

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The reaction of ethyl-[(4-methyl-6-oxo-1,6-dihydropyrimidin-2-yl)sulfanyl]acetate with aliphatic amines gives corresponding acetamides; the reaction with hydrazine hydrate and aniline leads to 2-hydrazinyl- and 2-anilinopyrimidine respectively.

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43

Darwish, Elham S., Mahmoud A. Abdelrahman, and Abdellatif M. Salaheldin. "Enamines in Heterocyclic Synthesis: A Novel Simple and Efficient Route to Condensed Pyridazines." Zeitschrift für Naturforschung B 66, no. 6 (2011): 597–602. http://dx.doi.org/10.1515/znb-2011-0607.

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An efficient and easy preparation of enamine derivatives, via active methyl and methylene compounds by in situ-generated 1-(diethoxymethyl)piperidine, produced from the mixture of triethyl orthoformate/piperidine/DMF, are described. Some new pyridazinone derivatives have been synthesized from the reaction of enamines with hydrazine hydrate and cyanoacid hydrazide.

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44

Isaeva, A. O., I. A. Krutov, R. N. Burangulova, D. K. Komunarova, A. I. Samigullina, and E. L. Gavrilova. "Reaction of diphenylphosphinal formic acid hydrazide with isothiocyanates." Журнал общей химии 93, no. 12 (2023): 1917–26. http://dx.doi.org/10.31857/s0044460x23120119.

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A new method was proposed for the preparation of diphenylphosphinylformic acid hydrazide based on the reaction of phosphine oxide and trimethylchlorosilane in the presence of a tertiary amine, followed by interaction with chloroformic acid ester and then hydrazine hydrate. The hydrazide moiety was modified into a thiosemicarbazide moiety by reacting diphenylphosphinylformic acid hydrazide with organic isothiocyanates. It was found that in an aqueous alkaline medium, thiosemicarbazides do not heterocyclize to 1,2,4-triazole-3-thiones, as expected. As a result of the rupture of the P-C bond, dip

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45

Aya H. Mohammed, Ahmed A. H. Al-Kadhimi, and Fadhel D. Khaled. "Synthesis and Characterization of new Mannich Bases for Pyrazole containing Benimidazole Ring." Tikrit Journal of Pure Science 23, no. 5 (2023): 95–101. http://dx.doi.org/10.25130/tjps.v23i5.592.

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This research includes synthesis of new derivatives of benzimidazole , the compound (A1*) prepared by reaction of o-phenylene diamine with carbon disulfide in alcoholic potassium hydroxide. Then the compound (A1*) was reaction with ethyl chloroacetate and potassium hydroxide to give ester (A2*). Then preparation of hydrazide (A3*) by the reaction of (A2*) with hydrazine hydrate (80%). Then we used the hydrazide (A3*) to prepare pyrazole (A4), then preparation of mannich basses by reaction of compound (A4) with different primary aromatic amines and formaldehyde

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46

Kamms, Zainab Dhia, and Mohammed K. Hadi. "Synthesis, Characterization and preliminary Anti-Microbial Evaluation of New Ibuprofen Hydrazide Derivatives." Pakistan Journal of Medical and Health Sciences 16, no. 3 (2022): 693–96. http://dx.doi.org/10.53350/pjmhs22163693.

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To create a novel series of aryl propionic acid with better antimicrobial properties, new Ibuprofen (2-(4-isobutylphenyl) propionic acid) hydrazone was prepared from the reaction of Ibuprofen ethyl ester and hydrazine hydrate in the presences of different aromatic aldehyde. Anti -microbial activity was tested for all compounds against gram positive (S. pyrogen, S.aureus), gram negative (E. coli, Klebsiella pneumoniae) bacterial strains and fungal strains (candida albicans). Compound (3f) display the highest anti-bacterial activity against gram positive bacteria while compound (3e) display high

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47

Abdel Hafez, Ali A., Raga A. Ahmed, Ahmed A. Geies, and Hussein S. El-Kashef. "Synthesis and Some Reactions of Thieno[2,3-d]pyrimidines and S-Substituted Mercaptopyridines." Collection of Czechoslovak Chemical Communications 58, no. 8 (1993): 1931–36. http://dx.doi.org/10.1135/cccc19931931.

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Ethyl 3-cyano-4,6-diphenyl-2-pyridylthioacetate (II) yielded with hydrazine hydrate hydrazides III, IV that both proved to be versatile compounds for the synthesis of new heterocyclic derivatives. Thus the thieno[2,3-bpyridine derivatives Xa - Xd and XIIa - XIId were obtained.

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48

Wasfy, Ashraf A. F., Mohamed M. H. Arief, Mahassen S. Amine, Shafey G. Donia та Aly A. Aly. "γ-Oxo Carboxylic Acids in Heterocyclic Synthesis, III. Synthesis of Biologically Active 4-Benzylamino-6-(5,5-dioxodibenzothiophen- 2-yl)-2,3,4,5-tetrahydropyridazin-3-ones". Zeitschrift für Naturforschung B 57, № 6 (2002): 668–76. http://dx.doi.org/10.1515/znb-2002-0613.

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α-Benzylamino-β-(5,5-dioxodibenzothiophen-2-carbonyl)propionic acid (1) has been synthesized by treating the corresponding β-aroylacrylic acid with benzylamine in dry benzene. On treatment with hydrazine hydrate the keto acid 1 furnishes the corresponding pyridazinone derivative 2. The behaviour of 2 towards carbon electrophiles, namely, ethyl chloroacetate, acrylonitrile, formaldehyde and secondary amines (under Mannich reaction conditions), aromatic aldehydes and carbon nucleophiles, namely, POCl3/PCl3 and P2S5 has been investigated. The 3-chloropyridazine derivative 13 reacts with hydrazine

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Kumar, Ravindra, and Y. K. Srivastava. "Microwave Induced Synthesis and Antimicrobial Activities of Some Derivatives of 3, 5-Diaryl-2-pyrazoline-1-carbaldehyde." E-Journal of Chemistry 7, no. 2 (2010): 496–500. http://dx.doi.org/10.1155/2010/160570.

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3, 5-Diaryl-2-pyrazoline-1-carbaldehyde(1)was condensed with hydrazine hydrate ando-phenylene diamine to afford corresponding hydrazones(2)and 3-benzimidazolyl-3, 5-diaryl-2-pyrazoline respectively under MWI condition. The newly synthesized compounds have been screened for their antibacterial activityin vitro.

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50

Ekram Abdullah Basheer, Kalid Matny Al-jaanaby, and Feras Shauki Al-joboury. "Synthesis a Number of Heterocyclic Compounds and some of chalcones Derived From Levofloxacin." Tikrit Journal of Pure Science 20, no. 5 (2023): 72–83. http://dx.doi.org/10.25130/tjps.v20i5.1243.

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The hydrazide (1) was used as synthone for the following Compound pyridazine-3,6-dione (2) by reaction of hydrazide (1) with maleic anhydride and Compound phthalazine-1,4-dione (3) by the reaction of hydrazide (1) with phthalic anhydride. Substituted thiosemicarbazides (6-7) by hydrazide(1) reaction with substituted isothiocyanates in ethanol. The thiosemicarbazide (5) was, also synthesized by the reaction of hydrazide (1) with ammonium thiocyanate in presence of concentrated hydrochloric acid. 1-Formyl-2-acyl hydrazine (4) was obtained by the reaction hydrazide (1) with formic acid, and Subst

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