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Journal articles on the topic 'Phenyl hydrazine method'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Ananthi, Vadamalai, Kaliyaraj Rajalakshmi, Inbasekaran Muthuvel, and Ganesamoorthy Thirunarayanan. "Solid acidic FeCl3/Bentonite catalyzed solvent-free condensation: Synthesis, spectral studies and antimicrobial activities of some aryl hydrazine Schiff’s bases." Annales Universitatis Mariae Curie-Sklodowska, sectio AA – Chemia 71, no. 2 (2017): 127. http://dx.doi.org/10.17951/aa.2016.71.2.127.

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<p>Some aryl hydrazide derivatives have been synthesized including 1-(3-chloro-4-nitrophenyl)-2-(3-substituted benzylidene) hydrazines by FeCl<sub>3</sub>/Bentonite catalyzed solvent-free condensation of substituted phenyl hydrazine and aldehydes under microwave irradiation. The yields of the hydrazides are more than 70%. The synthesized hydrazides are characterized by the physical constants, micro analysis and spectroscopic data. Effect of catalyst, solvent effect substituent effect and optimization of the catalyst was studied by the percentage of isolated yields. From the c

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2

Kaur, Aneet Kamal, Renu Bala, Poonam Kumari, Sumit Sood, and Karan Singh. "Microwave Assisted Vilsmeier-Haack Reaction on Substituted Cyclohexanone Hydrazones: Synthesis of Novel 4,5,6,7-Tetrahydroindazole Derivatives." Letters in Organic Chemistry 16, no. 3 (2019): 170–75. http://dx.doi.org/10.2174/1570178615666180917101637.

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Vilsmeier-Haack reaction is one of the most important chemical reactions used for formylation of electron-rich arens. Even though Vilsmeier-Haack reaction was studied on a wide variety of hydrazones of enolizable ketones, literature lacks the examples of the use of 4-substituted cyclohexanones as a substrate. The cyclization potential of hydrazones of cyclic keto compounds is still interested topic of investigation. In the present study, the reaction of various hydrazines with 4-substituted cyclohexanones was proceeded and the resulted hydrazones in crude form were treated with Vilsmeier- Haac

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3

GHAMMAMY, SHAHRIAR, and SAJJAD SEDAGHAT. "Determination and Characterization of New Palladium Complexes and Study of their Properties." Material Science Research India 9, no. 2 (2012): 223–26. http://dx.doi.org/10.13005/msri/090207.

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In the current study, two complexes prepared using ligands derived from hydrazine, tris [N (2, 4 di nitro phenyl) N’-(3-Nitro benzylidene) hydrazine[Pd(C13H10N5O4)]Cl2 and tris [N(2, 4 di nitro phenyl) N’-(3-phenyl alylidene) hydrazine[Pd(C15H13N4O4)]Cl2 using spectrometry techniques of UV-VIS and IR methods. In the current compounds, the way these ligands bonding with central metal investigated using IR method. Substitutions of C=N and C=O indicate that palladium being coordinated with ligands.

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4

Raut, Santosh, Bharat Dhotre, Atul Tidke, and Mohammad Arif Pathan. "An Operationally Simple and Efficient Synthesis of 7-Benzylidene-substitutedphenyl- 3,3a,4,5,6,7-hexahydro-2H-indazole by Grinding Method." Current Organic Synthesis 17, no. 4 (2020): 313–21. http://dx.doi.org/10.2174/1570179417666200406142118.

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Background: An eco-friendly, operationally simple and efficient reaction is shown between various 2,6-bis-(substituted-benzylidene)-cyclohexanones and differently substituted hydrazine in the presence of acetic acid. Methods: The reaction between various 2,6-bis-(substituted-benzylidene)-cyclohexanones and differently substituted hydrazine in the presence of acetic acid afforded 7-Benzylidene-substituted-phenyl-3,3a,4,5,6,7- hexahydro-2H-indazole in 74 to 92 % yield in short reaction time using the grindstone technique. Results and Discussion: The notable advantages of this method include mild

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5

Ali, M. M., M. Jesmin, S. M. A. Salam, J. A. Khanam, M. F. Islam, and M. N. Islam. "Pesticidal Activities of Some Schiff Bases Derived from Benzoin, Salicylaldehyde, Aminophenol and 2,4 Dinitrophenyl Hydrazine." Journal of Scientific Research 1, no. 3 (2009): 641–46. http://dx.doi.org/10.3329/jsr.v1i3.2585.

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The pesticidal activities of three Schiff bases namely PDH [N- (1 phenyl 2 hydroxy 2 phenyl ethylidine) 2¢4¢ dinitrophenyl hydrazine], PHP [N(1-phenyl 2 hydroxy -2 phenyl ethylidine) 2¢ hydroxy phenyl imine] and HHP [N (2-hydroxy benzylidine) 2¢ hydroxy phenyl imine] derived from benzoin, salicylaldehyde, 2 aminophenol and 2,4 dinitrophenyl hydrazine were evaluated against Tribolium castaneum. Probit mortality were studied by surface film treatment method at different doses of the compounds. The results showed that the LD50 values as recorded after 24 hours of treatment were 15.1268, 3.0922 an

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6

Bhandarkar, Subodh, and Bhavana Khobragade. "Synthesis and Biological Study of 2-( 5-aryl-4,5-dihydro-1-substituted-pyrazol-3-yl )-Substituted-Naphthalene-1-Ol." Advanced Materials Research 1110 (June 2015): 306–10. http://dx.doi.org/10.4028/www.scientific.net/amr.1110.306.

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The literature survey reveals that pyrazoline derivatives have been studied extensively because of their ready accessibility, diverse chemical reactivity, broad spectrum of biological activity and variety of Industrial applications. Pyrazolines with sulphonamidoaryl substituent at 3-position show cerebroprotective, antidepressant activity , anti-implantation activity, hypoglycemic activity. Due to this vital biological roll of pyrazoline derivatives it was thought to synthesized titled pyrazolines. 2-Acetyl-1-naphthol is prepared by Modified Nenchi’s method which on treatment with furfuraldehy

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7

.Gowd, V. S. "Facile and Multicomponent Synthesis of Amino Pyrazole employed by Mg (NO3)2 As Catalyst." INTERNATIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 09, no. 05 (2025): 1–9. https://doi.org/10.55041/ijsrem48648.

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ABSTRACT: The right path of investigation in the present study, an efficient and cost-effective method for the preparation of derivatives of 5-Amino-1, 3-diaryl-1 H-pyrazole-4-carbonitriles using Phenyl hydrazine, substituted aromatic aldehyde, and malononitrile in acetonitrile as a solvent employing Mg(NO3)2 as a catalyst under solvent condition. The chemical structures of the titled compounds were confirmed by 1H-NMR &13CNMR, Mass spectral and Elemental analysis. Antimicrobial activities of the titled compounds were also examined by various strains and exhibited mild to moderate anti-bac

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8

Giribabu, G., and Dr KRISHNARAO. "One Pot Multicomponent Synthesis of Amino Pyrazole Promoted by Imidazole and Bioevluation." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 09, no. 04 (2025): 1–9. https://doi.org/10.55041/ijsrem44605.

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In the present study and followed by conventional method, an efficient and design synthesis a novel series of 5-Amino-1,3-diphenyl-1H-pyrazole-4-carbonitrile derivatives. These derivatives can be obtained by Phenyl hydrazine, aromatic aldehydes, and malononitrile in presence of base catalyst Imidazole in ethanol as a solvent at reflux. All the newly obtained derivatives were evaluated by the advanced spectroscopic analysis such as 1HNMR, 13CNMR and LCMS and structural determination of titled analogous were calculated by elemental analysis. In addition to the newly synthesised compounds were ex

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9

Komal, Savaliya, and S. Patel Pankaj. "Synthesis and Biological evaluation Of Some New Benzoyl Pyrazole Derivatives bearing a 6,8-Dibromo-2-methylquinazolin-4-one Moiety." Der Pharma Chemica 14, no. 2 (2022): 6. https://doi.org/10.4172/0975-413X.14.2.1-5.

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A new series of 3-[4-(1-benzoyl-5-(substitutedphenyl)-4,5-dihydro-pyrazol-3-yl)phenyl]-6,8-dibromo-2-methylquinazolin-4-one have been synthesized by the condensation reaction of 6,8-dibromo-3-{4-[5-(substitutedphenyl)-4,5-dihydro-pyrazol-3-yl]phenyl}-2-methylquinazolin-4-one with benzoyl chloride by using pyridine as a solvent. The intermediate have been synthesized by refluxation of 6,8-dibromo-3-{4-[3- (substitutedphenyl)prop-2-enoyl]phenyl}-2-methylquinazolin-4-one (0.01M) and 99% hydrazine hydrate (0.015M) by using ethanol (50ml) as a solvent with various aldehydes. The chemical structures

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10

Savaliya, Komal, and S. Patel Pankaj. "Synthesis and Biological evaluation Of Some New Benzoyl Pyrazole Derivatives bearing a 6,8-Dibromo-2-methylquinazolin-4-one Moiety." Der Pharma Chemica 14, no. 2 (2022): 6. https://doi.org/10.5281/zenodo.13353950.

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A new series of 3-[4-(1-benzoyl-5-(substitutedphenyl)-4,5-dihydro-pyrazol-3-yl)phenyl]-6,8-dibromo-2-methylquinazolin-4-one have been synthesized by the condensation reaction of 6,8-dibromo-3-{4-[5-(substitutedphenyl)-4,5-dihydro-pyrazol-3-yl]phenyl}-2-methylquinazolin-4-one with benzoyl chloride by using pyridine as a solvent. The intermediate have been synthesized by refluxation of 6,8-dibromo-3-{4-[3- (substitutedphenyl)prop-2-enoyl]phenyl}-2-methylquinazolin-4-one (0.01M) and 99% hydrazine hydrate (0.015M) by using ethanol (50ml) as a solvent with various aldehydes. The chemical structures

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11

Justin, Jacob Thomas. "A Complete Analysis of The Synthesis and Pharmacological Effects of Pyrazolone Derivatives." International Journal of Pharmacy and Biological Sciences (IJPBS) 13, no. 2 (2023): 149–61. https://doi.org/10.5281/zenodo.10207120.

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AbstractPyrazolone is a five membered lactam ring, containing two nitrogen and one ketonic group in its structure. Pyrazalone's possesses anti-microbial, anti-fungal, antioxidant, anti-inflammatory, cytotoxicity, analgesic, anti-pyretic and anti-depressant activities. They also serve as precursors for dyes, pigments, pesticides, and chelating agents. Generally, the condensation of hydrazines with β-ketoester compounds is the classical method for the synthesis of pyrazolones, followed by reaction with various benzaldehyde derivatives. It is an exciting area of pharmaceutical chemistry to resear

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12

Zhu, Jianchen, Tianren Zhang, Yajie Liu, et al. "Fabrication of a superhydrophobic surface by modulating the morphology of organogels." Soft Matter 17, no. 13 (2021): 3745–52. http://dx.doi.org/10.1039/d0sm02182b.

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A low-molecular weight organic gelator (LMOG) bearing a hydrazine linkage and end-capped by alkoxy-substituted phenyl, namely 1,4-bis[(3,4-bisoctyloxyphenyl)hydrozide]phenylene (BPH-8), was used to facilely fabricate superhydrophobic surfaces by the drop-casting method.

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13

Zeng, Xiao Peng. "Modified Reduced Graphene Oxide with Enhanced Solubility and Conductivity and its Application." Advanced Materials Research 989-994 (July 2014): 859–62. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.859.

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Graphene oxide was modified with phenyl isocyanate first, and then reduced by a two step method-reduction with hydrazine hydrate first and an additional reduction in H2/Ar. The reduction with hydrazine hydrate in the first step can effectively remove the epoxy groups on the graphene, and the disposure of reduced graphene oxide (RGO) with H2 will change the residual amides and carbamate esters into conjugated C=N-ph structure. The introduced phenyl isocyanate not only acts as a functionalized group to prevent the aggregation of graphene but also will increase the electron concentration because

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14

Hanamghar, Dipali, Shivani Salokhe, Sachin Tembhurane, and Swati Kolhe. "Development and Evaluation of Nutritious Supplementary Food Product in Phenyl Hydrazine Induced Anaemia in Wistar Rats." Journal of Drug Delivery and Therapeutics 11, no. 1 (2021): 68–71. http://dx.doi.org/10.22270/jddt.v11i1.4654.

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Objective- Nutritional deficiency anemia mainly results from a lack of iron, but it also associated due to lack of folate/vitamin B12 and low vitamin C intake. From various studies this is found anemia in people is due to poor eating habits, such as not eating enough fruits and legumes such as beans and peas. Proper nutritional supplementation may be useful in such condition. The aim of the present work was to select a suitable iron rich food material, and prepared a suitable dosage form for management of anaemic condition and to evaluate anti-anaemic potential of nutritious supplementary food

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15

Jaffar Alkabee, Hanaa, and Israa Mohammad Joad. "Synthesis and study biological activity of some 1,8- Naphthyriane Derivatives." Al-Kufa University Journal for Biology 12, no. 1 (2020): 9–18. http://dx.doi.org/10.36320/ajb/v12.i1.8145.

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The compound 4-carboxy -2-phenyl-1,8- naphthyridine was synthesized from pyruvic acid, 2-Aminopyridine and Benzaldchyde (I).4-Hydrocynoamine-2-phenyl-1,8- Naphthyridine synthhesized from 4-Carboxy-2-phenyl-1.8-naphthyridine and phosphor penta chloride anhydrous in carbon tetra chloride, the resultant derivative was then separated by crushed ice and filtrated, the solid acid chloride thus obtained was used for further reaction. to the solid which was form was added hydrazine hydrate (II).4(p-phenyl dimethyl aminc) -hydrazine)-1,8-Naphthyridine (III) was synthesized from refluxed equimolar quant

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16

Lakshminarayanan, B., V. Rajamanickam, T. Subburaju, and L. A. Pradeep Rajkumar. "Synthesis and Antimicrobial Activity of Some 3-(5-Phenyl-4,5-dihydro-1-substitutedpyrazol-3-yl) chromen-2-one." E-Journal of Chemistry 7, no. 2 (2010): 383–90. http://dx.doi.org/10.1155/2010/184290.

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The title compounds were synthesized by condensation of 3-acetyl chromen-2-one with benzaldehyde in presence of alcoholic sodium hydroxide to get intermediate 3-(3-phenyl acryloyl) chromen-2-one, which were further treated with hydrazine hydrate to get 3-(5-phenyl-4,5-dihydro-1H-pyrazol-3-yl) chromen-2-one. The latter were refluxed with various amino compounds and various aldehyde derivatives on water bath for 5 h to afford title compounds. All the compounds were tested for their antibacterial and antifungal activities by the cup plate method.

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17

Arshia, Parveen. "Green Synthesis of Bioactive Pyrazolo[3,4-d]-pyrimidine Thiones." International Journal of Advance and Applied Research 3, no. 6 (2022): 66–71. https://doi.org/10.5281/zenodo.7421057.

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An efficient and green method for the preparation of 3- phenyl-1H-pyrazolo [3, 4-d] pyrimidine Thiones derivatives in minutes of time with high yields is accomplished by the mixture of ethyl acetoacetate, hydrazine hydrate, thiourea, and different benzaldehydes. The reaction is accomplished in the presence of ionic liquid [HBim}BF<sub>4</sub> in an excellent yield.

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18

Ravindra, S. Dhivare, and S. Rajput Shankarsing. "Synthesis, physicochemical probe and antimicrobial assay of bis-chalcone, pyrazole, amino-pyrimidine and malononitrile derivatives from five and six membered cyclic imides." Iranian Journal of Organic Chemistry 8, no. 4 (2017): 1909–18. https://doi.org/10.5281/zenodo.3911281.

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<strong>Abstract </strong> Heterocyclic imides greatly involved in the development of organic synthesis. Coloured flavonoids like bis-chalcones are formed by microwave-assisted solvent-free route using phenyl succinimide, glutarimide, and vanillin. To achieve the <em><strong>pyrazole</strong></em> and <strong><em>amino-pyrimidine</em></strong> derivatives by the cyclization of bis-chalcone with hydrazine hydrate and guanidine nitrate via microwave method. Then <strong><em>dimalononitriles</em></strong> were produced by the active methylene group of dinitrile with cyclic imides. Hence the physi

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19

Shailesh, H. Shah, and S. Patel Pankaj. "Synthesis and antimicrobial activity of azetidin-2-one containing pyrazoline derivatives." Journal of Indian Chemical Society Vol. 90, Jun 2013 (2013): 863–66. https://doi.org/10.5281/zenodo.5773732.

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Department of Chemistry, Patel J.B.R. Arts, Patel A.M.R. Commerce & Patel J.D.K.D. Science College, Borsad-388 540, Gujarat, India <em>E-mail </em>: shailchem@yahoo.com Department of Chemistry, Sheth L.H. Science College, Mansa, Gujarat, India <em>Manuscript received online 25 July 2012, revised 26 July 2012, accepted 31 July 2012</em> Pyrazolines are well-known and important nitrogen containing 5-membered heterocyclic compounds and various methods have been worked out for their synthesis. A new series of 3-chloro-1-{ 4-[5-(substituted phenyl)-4,5-dihydropyrazol-3-yl]phenyl}-4-(4-choloroph

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20

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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21

Syahputri, Yulian, Sutanto Sutanto, and Linda Jati Kusumawardani. "Synthesis of Ligand para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazol-5-yl) benzene by Aldol Condensation Method." Helium: Journal of Science and Applied Chemistry 1, no. 1 (2021): 25–29. http://dx.doi.org/10.33751/helium.v1i1.2953.

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Synthesis of pyrazoline derivative ligand para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazol-5-yl)benzene has been successfully carried out by aldol condensation method using 2-acetyl pyridine and terephthalaldehyde in ethanol solution. The synthesis results are then reacted with excess phenyl hydrazine. The yield of ligand obtainedwas 63.10% of ayellow solid. The ligand was characterized using 1H-NMR spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, fourier transform infra-red (FTIR) spectroscopy and spectrofluorometer. The characterization with UV-Vis spectrophotometer results shows

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22

Samanta, Kartick Chandra, Mohd Asif, Pooja, Vikas Garg, Priyanka Sharma, and Ravinder Singh. "Synthesis of Different Substituted Pyridazinone Derivatives and Their Anticonvulsant Activity." E-Journal of Chemistry 8, no. 1 (2011): 245–51. http://dx.doi.org/10.1155/2011/873470.

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6-Phenyl(3᾽-imino-benzylidene)-2,3,4,5-tetrahydro pyridazin-3-one derivatives were synthesized from 6-(3᾽-aminophenyl)-2,3,4,5-tetrahydro pyridazin-3-one by reaction with different aldehydes. The respective pyridazinone was prepared by cyclization of appropriateβ-(aminophenyl) propionic acid with hydrazine hydrate. The pyridazinone derivatives were tested for anticonvulsant activity by MES (maximal electro shock) method and found that few of them have shown significant anticonvulsant activity.

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23

Sasi, Priya. T., and S. Visweswaran. "Evaluation of haematinic activity of Kumara Veeriya Kaantha Chendhuram in phenyl hydrazine induced Anemia in experimental rats." World Journal of Biology Pharmacy and Health Sciences 13, no. 2 (2023): 116–23. https://doi.org/10.5281/zenodo.7948671.

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The science of medicine is one of the fundamental requirements to well being of humans and their survival. Siddha system is one of the traditional systems of medicine. According to WHO, anaemia is one of the leading causes of death in worldwide. Anaemia is the most common blood disorder, affecting about one third of the global population. In classical Siddha literature, <em>Kumara Veeriya Kaantha Chendhuram</em> is one of the formulation mentioned in <em>Anupoga Vaithiya Navaneetham </em>– part I helps in overcoming iron deficiency anaemia. The ingredients of the form

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24

Rathinamanivannan, S., K. Megha, Raja Chinnamanayakar, Ashok Kumar, and M. R. Ezhilarasi. "Synthesis and Characterization of 2-Pyrazoline Derivatives and their in silico and in vitro Studies on Antimicrobial and Anticancer Activities." Asian Journal of Chemistry 31, no. 10 (2019): 2191–96. http://dx.doi.org/10.14233/ajchem.2019.22082.

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The new series of 1-(4,5-dihydro-5-phenyl-3-diphenylpyrazol-1-yl)butan-1-one derivatives were synthesized by cyclization method using biphenyl chalcone with n-butyric acid and hydrazine hydrate. The synthesized 1-(4,5-dihydro-5-phenyl-3-diphenylpyrazol-1-yl)butan-1-one derivatives chemical structures were confirmed from spectral data such as FT-IR, 1H and 13C NMR. 2-Pyrazoline derivatives were docked with bacterial (1UAG) and breast cancer (1OQA) protein. Based on high binding affinity score, the best compound was subjected to in vitro anticancer activity by MTT assay. Also, antimicrobial acti

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Simeonova, Gergana, and Boyan Todorov. "MODIFICATION OF [18F]FDG BY THE FORMATION OF A HYDRAZONE BOND." Journal of IMAB - Annual Proceeding (Scientific Papers) 29, no. 1 (2023): 4784–88. http://dx.doi.org/10.5272/jimab.2023291.4784.

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Purpose: The [18F]-fluorodeoxyglucose ([18F]-FDG) is known to be one of the most used radio-pharmaceuticals for positron emission tomography. [18F]-FDG allows the assessment of glycolytic activity, which is more enhanced in tumor cells than in normal cells. It is also used in the assessment of heart and neurological diseases. The aim of our work is to follow the possibility of modifying [18F]-fluorodeoxyglucose and to develop an indirect radiofluorination procedure applicable under standard clinical conditions. Material/Methods: In the clinic of nuclear medicine at the University Hospital Sta.

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Khojasteh-Khosro, Sheida, and Hossein Shahbazi-Alavi. "Preparation of spirooxindoles catalyzed by nano-Co3S4 under microwave irradiations." Journal of Chemical Research 43, no. 3-4 (2019): 107–11. http://dx.doi.org/10.1177/1747519819841791.

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An efficient and rapid method is used for the synthesis of 10-methyl-8 H-spiro[benzo[5,6]chromeno[2,3- c]pyrazole-11,3′-indol]-2′(1′ H)-one and 8-methyl-10-phenyl-10,11-dihydrospiro[pyrazolo[3,4- b]benzo[ h]quinolin-7,3′-indol]-2′(1′ H)-one by a four-component reactions of phenylhydrazine or hydrazine hydrate, isatins, ketoesters, and naphthylamine or 2-naphthol using nano-Co3S4 under microwave irradiation.

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Ienascu, Ioana M. c., Alfa X. Lupea, Iuliana M. Popescu, Stefan Th Tomas, and Alina D. Zamfir. "Synthesis and Characterization of Some New 2-Hydroxy-N-(3-Trifluoromethyl-Phenyl)-Benzamide Derivatives." Revista de Chimie 59, no. 1 (2008): 56–60. http://dx.doi.org/10.37358/rc.08.1.1707.

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In the reaction between 2-hydroxy-N-(3-trifluoromethyl-phenyl)-benzamide and chloro-acetic acid ethyl ester, [2-(3-trifluoromethyl-phenylcarbamoyl)-phenoxy]-acetic acid ethyl ester was obtained. The ethyl ester was condensed with hydrazine giving 2-hydrazinocarbonylmethoxy-N-(3-trifluoromethyl-phenyl)-benzamide. This hydrazide is considered the key intermediate for the synthesis of new compounds. So, in the reaction between hydrazide and chloro-substituted benzaldehydes hydrazones were obtained. In order to establish their structures, all new synthesized compounds were analyzed by modern physi

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Aksenov, Nicolai A., Nikolai A. Arutiunov, Igor A. Kurenkov, et al. "A Two-Step Synthesis of Unprotected 3-Aminoindoles via Post Functionalization with Nitrostyrene." Molecules 28, no. 9 (2023): 3657. http://dx.doi.org/10.3390/molecules28093657.

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A novel, low-cost method for the preparation of not easily accessible free 3-aminoindoles has been developed. This approach is based on a well-established reaction between indoles and nitrostyrene in the presence of phosphorous acid, which results in the formation of 4′-phenyl-4′H-spiro[indole-3,5′-isoxazoles]. The latter could be transformed to corresponding aminated indoles by reaction with hydrazine hydrate in good or excellent yields upon microwave-assisted heating.

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Al Rashidy, Asmaa Ahmed Mohammed, Khalid Abdlaaziz Al Badrany, and Gassim Mohammed Al Garagoly. "Spectrophotometric Determination of Sulphamethoxazole Drug by New Pyrazoline Derived from 2,4-Dinitro Phenyl Hydrazine." Materials Science Forum 1002 (July 2020): 350–59. http://dx.doi.org/10.4028/www.scientific.net/msf.1002.350.

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Simple, sensitive and accurate spectrophotometric methods have been developed for the determination of Sulphamethoxazole (SMZ) drug . This method based on the reaction of Sulphamethoxazole (SMZ) with new organic reagent (BYN) it was prepare by reaction between ethyl acetoacetate with 2,4-Dinitrophenylhydrazine. The azo dye product shows absorption maximum at 435 nm. The linearity ranges of Sulphamethoxazole are (2-14 μg.mL-1) with molar absorptivity (14412.77 L.mol-1.cm-1), Sandell's sensitivity index (0.0175 μg.cm-2) , detection limit and Quantification limit ( 0.057, 0.175 μg / ml) respectiv

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Bhat, Mashooq Ahmad, Ahmad M. Naglah, Azmat Ali Khan, and Abdullah Al-Dhfyan. "Synthesis, molecular modelling and antibacterial activity of 4-aryl-thiosemicarbazides." Polish Journal of Chemical Technology 24, no. 1 (2022): 39–46. http://dx.doi.org/10.2478/pjct-2022-0006.

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Abstract N-Substituted phenyl/cyclohexyl-2-(pyridine-4-carbonyl) hydrazine-1-carbothioamides (2a–r) were synthesized, characterized by spectral and analytical data. The compounds were evaluated for antibacterial activity by the disc diffusion method. Most of the compounds showed activity against Gram-positive bacteria. Compound 2h with 4-Sulfapyrimidine phenyl substitution was found to be the most promising candidate, active against Gram-positive and methicillin-resistant Staphylococcus aureus (MRSA) strains with minimum inhibitory concentration (MIC) of (2–7 μg/mL). From the docking study, we

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Hasan, Reham H., and Hasan A. Hasan. "Synergism antibacterial activity for novel synthesized Schiff base ligands and semi-thiosemicarbazones with ß-diketones and 4-aminoantipyrine." Bionatura 7, no. 3 (2022): 1–11. http://dx.doi.org/10.21931/rb/2022.07.03.43.

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Schiff base ligands were synthesised in this work, the first is (Z)-2-((Z)-3-((1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)imino)-1,3-diphenylpropylidene) hydrazine-1-carboxamide, the second is (Z)-2-((1E,5Z,6E)-5-((1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)imino)-1,7-bis(4-hydroxy-3-methoxyphenyl)hepta-1,6-dien-3-ylidene)hydrazine-1-carbothioamide. The Schiff base ligands both were synthesised using the same method (the single pot reaction), using EtOH as the reaction medium and GAA as the catalyst in fixed temperature at 70 0C and reflux for 6 hrs. The starting mate

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Al-Jubori, Hamid Mohammed Saleh Al-Jubori. "Synthesis, Characterization, and Evaluation of the biological activity of novel Oxazepine compounds derived from monocarboxylic acid." Tikrit Journal of Pure Science 29, no. 3 (2024): 28–38. http://dx.doi.org/10.25130/tjps.v29i3.1602.

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Abstract In this study, novel compounds were synthesized from the ibuprofen nucleus, specifically 2-[4-(2-methylpropyl)phenyl]propanoic acid. The synthesis involved two main reactions: halogenation using bromine (1) Then, the esterification (2) and reaction of the resulting ester with hydrazine hydrate were carried out to prepare the hydrazide compounds. (3). By employing these reactions, a series of new hydrazone compounds (4-6) were successfully synthesized through a condensation reaction between substituted aromatic carbonyl compounds and hydrazine derivatives. Furthermore, the hydrazone de

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Kumar, M. Dinesh, P. Rajesh, R. Priya Dharsini, and M. Ezhil Inban. "Molecular Geometry, NLO, MEP, HOMO-LUMO and Mulliken Charges of Substituted Piperidine Phenyl Hydrazines by Using Density Functional Theory." Asian Journal of Chemistry 32, no. 2 (2019): 401–7. http://dx.doi.org/10.14233/ajchem.2020.22444.

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The quantum chemical calculations of organic compounds viz. (E)-1-(2,6-bis(4-chlorophenyl)-3-ethylpiperidine-4-ylidene)-2-phenyl-hydrazine (3ECl), (E)-1-(2,6-bis(4-chlorophenyl)-3-methylpiperidine-4-ylidene)-2-phenylhydrazine (3MCl) and (E)-1-(2,6-bis(4-chloro-phenyl)-3,5-dimethylpiperidine-4-ylidene)-2-phenylhydrazine (3,5-DMCl) have been performed by density functional theory (DFT) using B3LYP method with 6-311G (d,p) basis set. The electronic properties such as Frontier orbital and band gap energies have been calculated using DFT. Global reactivity descriptor has been computed to predict ch

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34

Solankee, A., K. Patel, and R. Patel. "A Facile Synthesis and Studies of Some New Chalcones and Their Derivatives Based on Heterocyclic Ring." E-Journal of Chemistry 9, no. 4 (2012): 1897–905. http://dx.doi.org/10.1155/2012/638452.

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Chalcones(6a-f)have been prepared by the condensation of ketone(5)and different aromatic and heterocyclic aldehydes. These chalcones(6a-f)on treatment with guanidine hydrochloride and phenyl hydrazine hydrochloride in presence of alkali give aminopyrimidines(7a-f)and phenylpyrazolines(8a-f)respectively. All the newly synthesized compounds have been characterized on the basis of IR,1HNMR spectral data as well as physical data. Antibacterial activity (minimum inhibitory concentration MIC) against Gram-positiveS. aureusMTCC 96 andS. pyogeneusMTCC 442 and Gram-negativeP. aeruginosaMTCC 1688 andE.

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35

Hidayah, Nurul, Bambang Purwono, and Ika Dyah Kumalasari. "A Novel Synthesis Route of Phenyl Quinoline from Nitrochalcone with Hydrazine Hydrate in the Presence of Pd/C." Key Engineering Materials 989 (October 28, 2024): 79–86. http://dx.doi.org/10.4028/p-17rfom.

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Quinoline is widely known to have many biological activities. Therefore, the development of the synthesis method of a quinoline derivative framework is a priority. A phenyl quinoline derivative, 6,7-dimethoxy-2-phenylquinoline Q1, has been successfully synthesized via a novel one-pot reaction that involves reduction, cyclization, and followed by dehydration of nitrochalcone derivate, 3-(4,5-dimethoxy-2-nitrophenyl)-1-phenylprop-2-en-1-one C1. The reaction was carried out using 80 % hydrazine hydrate in the presence of 10% Pd/C as a catalyst in an ethanol medium. Target compound Q1 was afforded

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36

Prashant, P. Chaudhari, S. Dhivare Ravindra, and S. Rajput Shankarsing. "Microwave Assisted Synthesis of Heterocycles Accompanied by Antimicrobial Screening." Journal of Advances and Scholarly Researches in Allied Education XV, no. 2 (2018): 324–29. https://doi.org/10.5281/zenodo.3911291.

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<strong>Abstract </strong> A clean, efficient, and solvent-free method for the synthesis of Bis-chalcones and Pyrazoles was carried out with the help of microwave irradiations and neutral alumina. The novel class of Bischalcones and pyrazoles were comprehended by the treatment of N-phenyl succinimides with p-fluoro benzaldehyde. The cyclic imide on condensation with p-fluoro benzaldehyde furnished a series of bis chalcones and further, they undergo cyclization with hydrazine hydrate to furnish pyrazoles. This condensation could make better and easier by a solvent-free mechanism with the help o

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37

Debnath, Subal, and S. Y. Manjunath. "Conventional and Microwave Assisted Synthesis of 3-(Substituted)-2-phenyl quinazolin-4(3H)-one and their Antibacterial and Anthelmintic Activity." International Journal of Pharmaceutical Sciences and Nanotechnology 4, no. 2 (2011): 1408–11. http://dx.doi.org/10.37285/ijpsn.2011.4.2.6.

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The present research work was aimed to synthesize a series of various substituted quinazolinone containing 3-(substituted)-2-phenylquinazolin-4(3H)-one. The compound 3-[(2-oxo-4-phenylazetidin-1-yl)-carbonyl]-2-phenylquinazolin-4(3H)-one, II was prepared by treating 4-oxo-2-phenyl-N-[(E)-phenylmethylidene]quinazoline-3(4H)-carboxamide, I with acetyl chloride and triethylamine (TEA) in benzene by conventional and microwave irradiation method. Synthesis of 3-[{2-oxo-3-(2,4-dichlorophenoxy)-4-phenylazetidin-carbonyl]-2-phenylquinazolin-4(3H)-one, III was carried out by reacting, I with 2,4-dichlo

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38

Patel, Pineshkumar N., and Denish C. Karia. "Synthesis and Antimicrobial Activity of Novel Series of Diversely Substituted Acetyl Pyrazoline Bearing Biphenyl Carbonitrile Motif." International Letters of Chemistry, Physics and Astronomy 69 (August 2016): 42–48. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.69.42.

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Novel series of diversely substituted acetyl pyrazoline having biphenyl carbonitrile motif have been synthesized. The reaction of 2-cyno-4’-bromomethyl biphenyl with1-(4-hydroxy-phenyl)-ethanone resulted in acetophenone derivative of biphenyl-2-carbonitrile. This acetophenone derivative was condensed with substituted aromatic aldehyde in mixed solvent resulted in various substituted chalcones. These chalcones were further cyclized using hydrazine hydrate in presence of glacial acetic acid to produce titled compound derivatives. The chemical structures of synthesized compounds were elucidated b

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39

Patel, Pineshkumar N., and Denish C. Karia. "Synthesis and Antimicrobial Activity of Novel Series of Diversely Substituted Acetyl Pyrazoline Bearing Biphenyl Carbonitrile Motif." International Letters of Chemistry, Physics and Astronomy 69 (August 12, 2016): 42–48. http://dx.doi.org/10.56431/p-al2z39.

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Novel series of diversely substituted acetyl pyrazoline having biphenyl carbonitrile motif have been synthesized. The reaction of 2-cyno-4’-bromomethyl biphenyl with1-(4-hydroxy-phenyl)-ethanone resulted in acetophenone derivative of biphenyl-2-carbonitrile. This acetophenone derivative was condensed with substituted aromatic aldehyde in mixed solvent resulted in various substituted chalcones. These chalcones were further cyclized using hydrazine hydrate in presence of glacial acetic acid to produce titled compound derivatives. The chemical structures of synthesized compounds were elucidated b

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40

Krishnan, Revathy, and Lalitha Appaswami. "CAN catalyzed synthesis of 1H-indazolotriones." Journal of Indian Chemical Society Vol. 92, Jun 2015 (2015): 857–59. https://doi.org/10.5281/zenodo.5636308.

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Department of Chemistry, Periyar University, Salem-636 011, Tamilnadu, India <em>E-mail</em> : lalitha2531@yahoo.co.in We have developed a potential method for the synthesis of biologically active<sup>1</sup> 2,2´-dimethyl-13-phenyl-2,3- dihydro-1<em>H</em>-indazolo[2,1-<em>b</em>]phthalazine-1,6,11(13<em>H</em>)-trione and its derivatives via an one-pot, four-component synthesis of phthalic anhydride, hydrazine, aromatic aldehydes and dimedone in the presence of ceric ammonium nitrate (CAN) at room temperature. The reaction was completed within 30 min yielding 70–90% of the corres

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41

A Mahmood Kubba, Ammar, and Nedaa A. A. Rahim. "Synthesis, Characterization and Antimicrobial Evaluation with DFT Study of New Two-Amino-4-(4-Chlorophenyl) Thiazole Derivatives." Iraqi Journal of Pharmaceutical Sciences ( P-ISSN: 1683 - 3597 , E-ISSN : 2521 - 3512) 27, no. 1 (2018): 79–88. http://dx.doi.org/10.31351/vol27iss1pp79-88.

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2-amino-4-(4-chloro phenyl)-1,3-thiazole (1) was synthesized by refluxing thiourea with para-chloro phenacyl bromide in absolute methanol. The condensation of amine compound (1) with phenylisothiocyanate in the presence of pyridine will produce 1-(4-(4-chlorophenyl)thiazol-2-yl)-3-phenylthiourea(2), which is upon treatment with 2,4 dinitrophenyl hydrazine by conventional method, afforded 1- ( 4 - ( 4 – chlorophenyl ) thiazol – 2 – yl ) – 3 - phenylhydrazonamide,N' - ( 2 , 4 -dinitrophenyl) ,(3).The characterization of the titled compounds were performed utilizing FTIR spectroscopy, 1HNMR and C

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42

R., Sapthagiri, Sriram R., Ilavarasan L., and Ravi A. "SYNTHESIS AND CHARACTERIZATION OF 2-AMINO-1, 3, 4-OXODIAZOLE DERIVATIVES." International Journal of Applied and Advanced Scientific Research 1, no. 2 (2017): 61–65. https://doi.org/10.5281/zenodo.258975.

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A simple protocol for the synthesis of 2-amino-1, 3, 4-oxadiazole derivatives using iodoaceticacid as a cyclodesulfurization agent. This method is also applicable to the synthesis of various substituted 2-amino-1, 3, 4-oxadiazole derivatives such as 5-(2-bromophenyl)-N-phenyl-1, 3, 4-oxadiazol-2-amine. The synthesized methodology was simple and hazardless, it’s giving good yield.

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43

Journal, Baghdad Science. "Synthesis, Characterization and Stability Study of V(IV), Zr(IV), Rh(III), Pd(II), Cd(II) and Hg(II) Complexes with Pyrazol Derivative." Baghdad Science Journal 11, no. 4 (2014): 1592–603. http://dx.doi.org/10.21123/bsj.11.4.1592-1603.

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In this work lactone (1) was prepared from the reaction of p-nitro phenyl hydrazine with ethylacetoacetate, which upon treatment with benzoyl chloride afforded the lactame (2). The reaction of (2) with 2-amino phenol produced a new Schiff base (L) in good yield. Complexes of V(IV), Zr(IV), Rh(III), Pd(II), Cd(II) and Hg(II) with the new Schiff base (L) have been prepared. The compounds (1, 2) were characterized by FT-IR and UV spectroscopy, as well as characterizing ligand (L) by the same techniques with elemental analysis (C.H.N) and (1H-NMR). The prepared complexes were identified and their

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44

Al-bayati, Sinan M., Enaam M. Rasheed, Maysoon A. Al-Soodani, and Sarab M. Salah. "Synthesis, Characterization and Stability Study of V(IV), Zr(IV), Rh(III), Pd(II), Cd(II) and Hg(II) Complexes with Pyrazol Derivative." Baghdad Science Journal 11, no. 4 (2014): 1592–603. http://dx.doi.org/10.21123/bsj.2014.11.4.1592-1603.

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In this work lactone (1) was prepared from the reaction of p-nitro phenyl hydrazine with ethylacetoacetate, which upon treatment with benzoyl chloride afforded the lactame (2). The reaction of (2) with 2-amino phenol produced a new Schiff base (L) in good yield. Complexes of V(IV), Zr(IV), Rh(III), Pd(II), Cd(II) and Hg(II) with the new Schiff base (L) have been prepared. The compounds (1, 2) were characterized by FT-IR and UV spectroscopy, as well as characterizing ligand (L) by the same techniques with elemental analysis (C.H.N) and (1H-NMR). The prepared complexes were identified and their

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45

Waheed uz Zuman, Waheed uz Zuman, Rida Ayub Rida Ayub, and Amara Dar and Jamil Anwar Amara Dar and Jamil Anwar. "Determination of Diclofenac Sodium in Pharmaceutical Preparations by Computational Image Scanning Densitometry." Journal of the chemical society of pakistan 45, no. 3 (2023): 237. http://dx.doi.org/10.52568/001248/jcsp/45.03.2023.

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Diclofenac sodium is a nonsteroidal anti-inflammatory drug which cures by reducing substances in the body that cause pain and inflammation. There is always a risk of heart attack and stroke in case of taking excess of the drug. In present study a simple, fast and cost-effective method is devised for the assay of diclofenac sodium in locally available pharmaceutical preparations. The method is based on the reaction of the drug with 2, 4-DNPH (2, 4-Dinitro phenyl hydrazine). Micro-quantities of the drug gave green coloured spots when mixed with 2,4-DNPH on a pre-coated TLC plate, in the presence

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46

Choi, Heekyoung, Misun Go, Yubin Cha, Yeonweon Choi, Ki-Young Kwon, and Jong Hwa Jung. "A facile method to fabricate hydrogels from DMSO polymer gels via solvent exchange." New Journal of Chemistry 41, no. 12 (2017): 4793–96. http://dx.doi.org/10.1039/c7nj00152e.

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A mixture of the bipyridine, phenyl and/or cyclohexanediamine-based building blocks 1, 2, and/or 3, having hydrazide, aldehyde or amine moieties, respectively, formed DMSO polymer gels by the hydrazone reaction under acidic conditions.

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Krátký, Martin, Zsuzsa Baranyai, Šárka Štěpánková, et al. "N-Alkyl-2-[4-(trifluoromethyl)benzoyl]hydrazine-1-carboxamides and Their Analogues: Synthesis and Multitarget Biological Activity." Molecules 25, no. 10 (2020): 2268. http://dx.doi.org/10.3390/molecules25102268.

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Based on the isosterism concept, we have designed and synthesized homologous N-alkyl-2-[4-(trifluoromethyl)benzoyl]hydrazine-1-carboxamides (from C1 to C18) as potential antimicrobial agents and enzyme inhibitors. They were obtained from 4-(trifluoromethyl)benzohydrazide by three synthetic approaches and characterized by spectral methods. The derivatives were screened for their inhibition of acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) via Ellman’s method. All the hydrazinecarboxamides revealed a moderate inhibition of both AChE and BuChE, with IC50 values of 27.04–106.75 µM a

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Kotapati Nalini, Palnati Narmada, and Gopal Vaidyanathan. "Quantitative Method For The Determination Of Phenyl Hydrazine, A Potential Genotoxic Impurity Of Ondansetron Hydrochloride Using Tandem Mass Spectrometry." American Journal of PharmTech Research 10, no. 5 (2020): 28–36. http://dx.doi.org/10.46624/ajptr.2020.v10.i5.003.

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Tamrin, S. Leny, and Eddiyanto. "Preparation and characterization of liquid natural rubber through oxidative degradation with phenyl hydrazine and benzoyl peroxide-oxygen." IOP Conference Series: Earth and Environmental Science 912, no. 1 (2021): 012098. http://dx.doi.org/10.1088/1755-1315/912/1/012098.

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Abstract The aim of this research was to synthesize liquid natural rubber (LNR) from Natural rubber (SIR-20) by chain scission method in the presence of oxygen gas and difference of peroxides, phenyl hydrazine and benzoyl peroxide. The chain scission reaction was conducted in solution of xylene in close system. SIR-20 was diluted xylene before flushing with oxygen and the addition of the peroxide. The degradation oxidation by the oxygen and the peroxides was processed at 60°C for 24 hours. The degradative oxidation product was re-precipitated by adding the excess of methanol and filtrated befo

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Hegde, Mithra N., Suchetha Kumari, Nidarsh D. Hegde, and Shilpa S. Shetty. "RELATION BETWEEN SALIVARY AND SERUM VITAMIN C LEVELS AND DENTAL CARIES EXPERIENCE IN ADULTS - A BIOCHEMICAL STUDY." Journal of Health and Allied Sciences NU 03, no. 04 (2013): 030–33. http://dx.doi.org/10.1055/s-0040-1703698.

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AbstractThe aim of this study was to estimate the vitamin C levels in saliva and serum of caries free and caries active adults and to correlate the vitamin C level with DMFT index (D=decayed, m=missing, f=filled, t=teeth) index. The present study included eighty healthy adults who were divided into four groups; Control, Group- I, Group II and Group- III with a DMFT index 0, <3, <10 and > 10 respectively. Saliva and serum samples were collected from all the four groups. The vitamin C of saliva and serum was estimated by dinitro phenyl hydrazine (DNPH) method. One-way ANOVA was used to

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