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Journal articles on the topic 'Hydrazine Hydrate'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

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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2

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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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

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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5

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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6

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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7

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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8

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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9

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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10

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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11

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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12

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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13

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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14

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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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

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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17

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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18

Ni, Weijun, Guohao Yang, Jie Dong, Yansong Pan, Gang Chen, and Xuefan Gu. "Research and Evaluation of Foam-Drainage Corrosion-Inhibition Hydrate Anti-Aggregation Integrated Agent." Processes 11, no. 9 (2023): 2745. http://dx.doi.org/10.3390/pr11092745.

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In natural gas exploitation, foam drainage, corrosion inhibition and hydrate inhibition of wellbore fluid are conventional operations. However, there is often a problem where multiple chemical agents cannot be effectively used together and can only be used separately, resulting in complex production processes. In this study, the final integrated formulation was determined: 0.1% sodium alpha-olefin sulfonate (AOST) + 0.3% dodecyl dimethyl betaine (BS-12) + 0.3% sodium lignosulfonate + 0.5% hydrazine hydrate. The minimum tension of the integrated agent could be reduced to 23.5 mN/m. The initial

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19

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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20

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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21

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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22

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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23

Suvarnaphaet, Phitsini, Wattapong Pinyo, Suejit Pechprasarn, and Naphat Albutt. "Fluorescence Detection of Hydrazine Hydrate Using Carbon Nanodots Synthesized from Mandarin Rind." Applied Mechanics and Materials 891 (May 2019): 71–77. http://dx.doi.org/10.4028/www.scientific.net/amm.891.71.

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Hydrazine hydrate is a highly toxic chemical widely used in agricultural and pharmaceutical industries. Exposure to hydrazine can induce an irritation of respiratory tract, blindness, damage of the DNA and central nervous system. In this paper, we will show the hydrazine hydrate (N2H4) detection using fluorescence carbon nanodots synthesized from mandarin rind, the so-called R-CNDs. Highly sensitive detection can be seen by naked eyes in a fluorescence red-shifting and by analyzing absorption spectra in case of micromolar concentrations of hydrazine hydrate solution.

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24

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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25

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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26

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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27

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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28

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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29

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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30

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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31

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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32

Михайлов, А. А., Д. В. Филипчук, М. О. Этрекова, and А. В. Литвинов. "MEASURING HYDRAZINE HYDRATE VAPOR CONCENTRATIONS IN AIR USING MIS-SENSORS." Химическая безопасность / Chemical Safety Science 2, no. 2(4) (2018): 131–38. http://dx.doi.org/10.25514/chs.2018.2.14110.

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Аннотация - Ввиду высокой токсичности гидразин-гидрата требуется вести непрерывный контроль его концентрации в воздухе рабочей зоны. Для измерения концентраций паров гидразин-гидрата предложено использовать МДП-сенсоры. Проведены исследования чувствительности двух сенсоров на основе МДП-структур к концентрациям паров гидразин-гидрата в воздухе. Показано, что минимально обнаружимая концентрация гидразин-гидрата при помощи используемых сенсоров составляет 0,005 мг/м3 (в лабораторных условиях). Разработана экспериментальная установка для создания концентраций гидразин-гидрата, которая отличается

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33

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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34

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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35

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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36

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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37

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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38

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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39

Khan, R., PA Konowicz, L. Gardossi, M. Matulova, and S. Degennaro. "Regioselective Deacetylation of Fully Acetylated Mono- and Di-Saccharides With Hydrazine Hydrate." Australian Journal of Chemistry 49, no. 3 (1996): 293. http://dx.doi.org/10.1071/ch9960293.

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Selective deacetylation reactions of the peracetylated reducing disaccharides (1), (5), (9), (15), β-D- glucopyranose (17) and 2-acetamido-2-deoxy-β-D-glucopyranose (19), with 1.2 equiv. Of hydrazine hydrate in acetonitrile, gave predominantly the corresponding heptaacetates (2), (6), (10), (16), the tetraacetate (18) and the triacetate (20), with the free hydroxy group at C1. Reaction of (1) with 1.2 equiv. of hydrazine hydrate in N,N- dimethylformamide also afforded the heptaacetate (2), but in lower yield. When reactions of (1), (5) and (9) were performed with 2.5 equiv. of hydrazine hydrat

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40

Jain, Asheesh Kumar. "Hydrazine Hydrate (NH2NH2·H2O)." Synlett, no. 13 (2004): 2445–46. http://dx.doi.org/10.1055/s-2004-832831.

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41

Young, Jay A. "Hydrazine Hydrate (24% Solution)." Journal of Chemical Education 86, no. 9 (2009): 1022. http://dx.doi.org/10.1021/ed086p1022.

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42

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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43

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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44

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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45

Sojitra, C., S. Agarwal, C. Dholakia, P. Sudhakar, and K. K. Singh. "QUANTIFICATION OF HYDRAZINE HYDRATE IN IMATINIB MESYLATE AT GENOTOXIC LEVEL BY CHROMATOGRAPHIC METHOD." INDIAN DRUGS 56, no. 12 (2019): 45–52. http://dx.doi.org/10.53879/id.56.12.11971.

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Hydrazine hydrate has genotoxic effect in nature and so it should be controlled down as Potential Genotoxic Impurity (PGI). Being polar molecule, hydrazine hydrate (N2H4.H2O) has no chromophores present in structure which can follow Lambert beer law, thus it is difficult to analyze. The present work described an accurate and highly sensitive reversed-phase liquid chromatography-UV derivatization method for determination of hydrazine in imatinib mesylate drug substance. The method of quantification was developed by attaching chromophores to hydrazine with derivatization, which helped to increas

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46

Mahmoud, Mahmoud R., Eman A. A. El-Bordany, Naglaa F. Hassan, and Fatma S. M. Abu El-Azm. "New 2,3-Disubstituted Quinazolin-4(3H)-Ones from 2-Undecyl-3,1-Benzoxazin-4-One." Journal of Chemical Research 2007, no. 9 (2007): 541–44. http://dx.doi.org/10.3184/030823407x248315.

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2-undecyl-4H-3,1-benzoxazin-4-one (2) was prepared and reacted with primary and secondary amines affording compounds 3–7, while with hydrazine hydrate it gave the quinazolinone derivative 8. The reaction of 8 with 3,4,5-trimethoxybenzaldehyde followed by thioglycollic acid yielded 9 and 10, respectively. Acylation of 8 using cinnamoyl chloride gave 11. Furthermore, treatment of 2 with hydrazine derivatives provided 12 and 13. Fusion of 2 with ammonium acetate gave the quinazolinone derivative 14 which upon treatment with ethyl chloroacetate yielded the ester 15. The hydrazide 17 was obtained f

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47

Gaffer, Hatem E., Mohamed A. E. Khalifa, Shaima F. El-Bially, and Mohamed A. Metwally. "New azo disperse dyes containing cyclohexanone ring for dyeing polyester and nylon fabrics." Macedonian Journal of Chemistry and Chemical Engineering 29, no. 1 (2010): 87. http://dx.doi.org/10.20450/mjcce.2010.176.

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Condensation of 2,4-diacarboethoxy-5-hydroxy-3-(4-methoxyphenyl)-5-methyl cyclohexanone (1) with equimolar amounts of hydrazine hydrate and phenyl hydrazine afforded the corresponding 2H-indazole-5-carboxylates 2a and 2b, respectively. Coupling of 2 with diazotized aromatic amines furnished the corresponding azo compounds 3a n. When compound 1 was subjected to the Japp-Klingemann reaction in alkaline medium with diazotized aromatic amines furnished the corresponding hydrazones 4a-g. The treatment of 4a-g with phenyl hydrazine in acetic acid allows the isolation of arylhydrazono derivatives 5a-

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48

Nakhutsrishvili, I., Z. Adamia, and G. Kakhniashvili. "Gas Etching of Germanium Surface with Water Vapors Contained in NitrogenContaining Reagents." Journal of Applied Surface Science 2, no. 2 (2024): 01–05. https://doi.org/10.33140/jass.02.02.01.

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The reactions of nitridation of the surface of single-crystallyne germanium in wet ammonia, in hydrazine and hydrazine-hydrate vapors have been studied. In these processes, nitride is formed - a mixture of the α- and β-modifications of germanium nitride Ge3 N4 . In this case, the relative content of the α-phase increases with the degree of humidity of the gas reagent. The formation of nitride is preceded by the process of etching the surface of germanium with water vapor contained in ammonia and hydrazine. The activation energies of this process are ~46 kcal/mol in the case of ammonia, ~53 kca

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49

Shal’nova, L. I., and N. A. Lavrov. "Obtaining and prospects for the use of hydrazide N-vinylsuccinamic acid copolymers as a carrier of biofunctional substances with directional effect." Plasticheskie massy, no. 9-10 (November 2, 2019): 8–10. http://dx.doi.org/10.35164/0554-2901-2019-9-10-8-10.

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Water-soluble (co) polymers of N-vinylsuccinamic acid hydrazide are obtained as a result of polymer-analogous transformations in the interaction of hydrazine-hydrate of vinyl acetate copolymers with vinyl succinimide and polyvinyl succinimide. Using IR spectroscopy, potentiometric titration, elemental analysis, their structure and composition were established. The possibility of using copolymers as carriers of biofunctional substances of an acidic nature is shown.

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50

Metwally, Mohamed Abbas, and M. A. Sofan. "Synthesis of Some New Pyrrolo Heterocycles of Pharmaceutical Interest from 1,4-Diphenylpyrrolidine-2,3,5-trione+." Zeitschrift für Naturforschung B 45, no. 3 (1990): 382–84. http://dx.doi.org/10.1515/znb-1990-0313.

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Continuing earlier studies designed to obtain derivatives of pharmacological interest, some novel compounds 2, 5, 6, 7 and 8 were prepared using 1,4-diphenylpyrrolidine-2,3,5-trione (1) and 1,2-phenylenediamines, o-aminophenol, 1,3-diphenylacetone and thiosemicarbazide, respectively. The hydrazino derivative (8) was obtained from 7 and hydrazine hydrate. Structural identification was obtained by 1H NMR, mass spectra and IR spectral data.

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