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Journal articles on the topic 'Phenylhydrazides'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Knizek, Jörg, Ingo Krossing, Heinrich Nöth, Holger Schwenk, and Thomas Seifert. "Synthesis and Structures of Sodium Phenylhydrazides." Chemische Berichte 130, no. 8 (1997): 1053–62. http://dx.doi.org/10.1002/cber.19971300806.

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2

do Carmo Maquiaveli, Claudia, Edson Roberto da Silva, Barbara Hild de Jesus, et al. "Design and Synthesis of New Anthranyl Phenylhydrazides: Antileishmanial Activity and Structure–Activity Relationship." Pharmaceuticals 16, no. 8 (2023): 1120. http://dx.doi.org/10.3390/ph16081120.

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Leishmaniasis is a neglected tropical disease affecting millions of people worldwide. A centenary approach to antimonial-based drugs was first initiated with the synthesis of urea stibamine by Upendranath Brahmachari in 1922. The need for new drug development led to resistance toward antimoniates. New drug development to treat leishmaniasis is urgently needed. In this way, searching for new substances with antileishmanial activity, we synthesized ten anthranyl phenylhydrazide and three quinazolinone derivatives and evaluated them against promastigotes and the intracellular amastigotes of Leish

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3

Čeřovský, Václav, та Karel Jošt. "Enzymatically catalyzed synthesis of dipeptides of γ-carboxy-L-glutamic acid from benzyloxycarbonyl-γ-carboxy-DL-glutamic acid". Collection of Czechoslovak Chemical Communications 50, № 4 (1985): 878–84. http://dx.doi.org/10.1135/cccc19850878.

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Enantioselective reaction of benzyloxycarbonyl-γ-carboxy-DL-glutamic acid with phenylhydrazides of various amino acids and with leucine, protected with various carboxy-protecting groups, has been studied.

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4

Zhu, Panpan, Jinshuo Zheng, Jin Yan, Zhaoxia Li, Xinyi Li, and Huiling Geng. "Design, Synthesis, and Biological Evaluation of N′-Phenylhydrazides as Potential Antifungal Agents." International Journal of Molecular Sciences 24, no. 20 (2023): 15120. http://dx.doi.org/10.3390/ijms242015120.

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Fifty-two kinds of N′-phenylhydrazides were successfully designed and synthesized. Their antifungal activity in vitro against five strains of C. albicans (Candida albicans) was evaluated. All prepared compounds showed varying degrees of antifungal activity against C. albicans and their MIC80 (the concentration of tested compounds when their inhibition rate was at 80%), TAI (total activity index), and TSI (total susceptibility index) were calculated. The inhibitory activities of 27/52 compounds against fluconazole-resistant fungi C. albicans 4395 and 5272 were much better than those of fluconaz

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5

GEMUEND, B., H. NOETH, H. SACHDEV, and M. SCHMIDT. "ChemInform Abstract: Structural Chemistry of Alkali Metal Phenylhydrazides." ChemInform 28, no. 6 (2010): no. http://dx.doi.org/10.1002/chin.199706081.

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6

Gąsowska, Beata, Bożena Frąckowiak, and Hubert Wojtasek. "Indirect oxidation of amino acid phenylhydrazides by mushroom tyrosinase." Biochimica et Biophysica Acta (BBA) - General Subjects 1760, no. 9 (2006): 1373–79. http://dx.doi.org/10.1016/j.bbagen.2006.05.001.

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7

Verardo, Giancarlo, Paola Geatti, Paolo Martinuzzi, Marcello Merli та Nicoletta Toniutti. "Condensation Reaction Betweenα-Amino Acid Phenylhydrazides and Carbonyl Compounds". European Journal of Organic Chemistry 2003, № 19 (2003): 3840–49. http://dx.doi.org/10.1002/ejoc.200300251.

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8

Crizanto de Lima, Evanoel, Frederico S. Castelo-Branco, Claudia C. Maquiaveli, et al. "Phenylhydrazides as inhibitors of Leishmania amazonensis arginase and antileishmanial activity." Bioorganic & Medicinal Chemistry 27, no. 17 (2019): 3853–59. http://dx.doi.org/10.1016/j.bmc.2019.07.022.

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9

Čeřovský, Václav, and Karel Jošt. "Enzymatically catalyzed synthesis of oxytocin fragments 1-6 and 7-9." Collection of Czechoslovak Chemical Communications 50, no. 12 (1985): 2775–82. http://dx.doi.org/10.1135/cccc19852775.

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Papain, α-chymotrypsin, thermolysin and elastase were utilized in the synthesis of peptide bonds of the protected oxytocin nonapeptide, except the S-benzylcysteine-proline bond. Amino groups were protected with benzyloxycarbonyl or tert-butyloxycarbonyl groups, carboxy groups as ethyl ester, phenylhydrazides or amides. The cysteine sulfhydryl group was blocked with the benzyl group whereas the tyrosine hydroxyl was unprotected. Most of the fragments were synthesized in satisfactory yields using an equimolar ratio of both reaction components and minimal (experimentally determined) amount of the

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10

Čeřovský, Václav. "Synthesis of pressinoic acid by enzymatically catalyzed formation of peptide bonds." Collection of Czechoslovak Chemical Communications 51, no. 6 (1986): 1352–60. http://dx.doi.org/10.1135/cccc19861352.

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Three fully enzymatic syntheses of the 1-6 vasopressin hexapeptide were investigated using papain, α-chymotrypsin and thermolysin. Best results were obtained with thermolysin in the 2 + 4 fragment condensation. The α-chymotrypsin-catalyzed 3 + 3 condensation is less advantageous and the 4 + 2 condensation with papain gave only low yield. Using the mentioned enzymes, further fragments of vasopressin molecule were prepared. Amino groups were protected with benzoylcarbonyl or tert-butyloxycarbonyl groups, carboxyl groups as phenylhydrazides or methyl esters, and the cysteine sulfhydryl group as t

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11

Kalikhman, I. D., O. B. Bannikova, B. A. Gostevskii, et al. "Structure of trimethylsilyl derivatives of the phenylhydrazides of acetic and trifluoroacetic acids." Bulletin of the Academy of Sciences of the USSR Division of Chemical Science 34, no. 6 (1985): 1276–77. http://dx.doi.org/10.1007/bf00956099.

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12

Bouzayani, Nadia, Sylvain Marque, Brahim Djelassi, Yakdhane Kacem, Jérôme Marrot, and Béchir Ben Hassine. "Enantiopure Schiff bases of amino acid phenylhydrazides: impact of the hydrazide function on their structures and properties." New Journal of Chemistry 42, no. 8 (2018): 6389–98. http://dx.doi.org/10.1039/c7nj04597b.

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New chiral Schiff bases have been synthesized and characterized with an important contribution from quantum chemical calculations at the DFT level of theory. They have been evaluated for their physical and biological properties.

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13

Niño-Vega, Gustavo A., Leonardo Padró-Villegas, and Everardo López-Romero. "New Ground in Antifungal Discovery and Therapy for Invasive Fungal Infections: Innovations, Challenges, and Future Directions." Journal of Fungi 10, no. 12 (2024): 871. https://doi.org/10.3390/jof10120871.

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This review explores current advancements and challenges in antifungal therapies amid rising fungal infections, particularly in immunocompromised patients. We detail the limitations of existing antifungal classes—azoles, echinocandins, polyenes, and flucytosine—in managing systemic infections and the urgent need for alternative solutions. With the increasing incidence of resistance pathogens, such as Candida auris and Aspergillus fumigatus, we assess emerging antifungal agents, including Ibrexafungerp, T-2307, and N′-Phenylhydrazides, which target diverse fungal cell mechanisms. Innovations, s

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14

Ben Hassine, Béchir, та Yakdhane Kacem. "Solvent-Free Synthesis of New Chiral 3-Phenylamino-3,5-dihydro-4H-imidazol-4-one Derivatives from α-Amino Acid Phenylhydrazides". HETEROCYCLES 89, № 1 (2014): 197. http://dx.doi.org/10.3987/com-13-12878.

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15

Biesemeier, Frank, and Ulrich Müller. "Die Reaktion von Phenylpentazol mit n-Butyllithium. Synthese von 1,1-Di-n-butyl-2-phenylhydrazin / The Reaction of Phenylpentazole with n-Butyl Lithium. Synthesis of 1,1-Di-n-butyl-2-phenylhydrazine." Zeitschrift für Naturforschung B 59, no. 3 (2004): 351–54. http://dx.doi.org/10.1515/znb-2004-0322.

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The reaction of phenylpentazole, C6H5-cyclo-N5, with n-butyl lithium in tetrahydrofuran or in diethylether does not yield a lithium pentazolide such as Li(THF)4+N5−. Instead, a mixture of several primary products is obtained, which probably include lithium 1-n-butyl-5-phenyl-pentaazadienide, Li+[n-C4H9− N=N−N−N=N−C6H5]− and di-n-butyl-phenylhydrazide, Li+[(n-C4H9)2N−N−C6H5]−. After hydrolysis 1,1-di-n- butyl-2-phenylhydrazine, (n- C4H9)2N−NH−C6H5, is ob- tained with good yield. This compound is an oil that was characterized by NMR, mass and IR spectroscopy

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16

Ben Hassine, Bechir, та Yakdhane Kacem. "ChemInform Abstract: Solvent-Free Synthesis of New Chiral 3-Phenylamino-3,5-dihydro-4H-imidazol-4-one Derivatives from α-Amino Acid Phenylhydrazides." ChemInform 45, № 24 (2014): no. http://dx.doi.org/10.1002/chin.201424136.

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17

Verardo, Giancarlo, Paola Geatti, Marcello Merli та Elena E. Castellarin. "Synthesis of 3-Substituted Dihydro-1-phenylamino-1H-pyrrolo[1,2-a]imidazole-2,5(3H,6H)-diones fromα-Amino Acid Phenylhydrazides and Levulinic Acid". European Journal of Organic Chemistry 2004, № 13 (2004): 2833–39. http://dx.doi.org/10.1002/ejoc.200400112.

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18

Morpurgo, L., O. Befani, S. Sabatini, et al. "Spectroscopic studies of the reaction between bovine serum amine oxidase (copper-containing) and some hydrazides and hydrazines." Biochemical Journal 256, no. 2 (1988): 565–70. http://dx.doi.org/10.1042/bj2560565.

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The carbonyl cofactor of bovine serum amine oxidase, recently identified as pyrroloquinoline quinone [Ameyama, Hayashi, Matsushita, Shinagawa & Adachi (1984) Agric. Biol. Chem. 48, 561-565; Lobenstein-Verbeek, Jongejan, Frank & Duine (1984) FEBS Lett. 170, 305-309], reacts stoichiometrically and irreversibly with hydrazides of phenylacetic acid and of benzoic acid. With the phenylacetic hydrazides a reversible intermediate step was detected by competition with substrate, carbonylic reagents or phenylhydrazine, a typical inhibitor of the enzyme. All hydrazides form an intense broad band

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19

Young, Jay A. "Phenylhydrazine." Journal of Chemical Education 83, no. 11 (2006): 1594. http://dx.doi.org/10.1021/ed083p1594.

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20

Čeřovský, Václav, and Karel Jošt. "Enzymatically catalyzed synthesis of dipeptides containing O4-sulfotyrosine and O4-phosphotyrosine." Collection of Czechoslovak Chemical Communications 52, no. 4 (1987): 1079–86. http://dx.doi.org/10.1135/cccc19871079.

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Conditions for the thermolysin- or papain-catalyzed peptide bond formation between tert-butyloxycarbonyl-O4-sulfotyrosine and leucine or methionine phenylhydrazide have been found. Acylation of O4-sulfotyrosine phenylhydrazide with tert-butyloxycarbonylphenylalanine methyl ester was catalyzed by α-chymotrypsin. Tert-butyloxycarbonyl-O4-phosphotyrosyl-leucine phenylhydrazide was prepared by thermolysin-catalyzed reaction.

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21

Barluenga, José, Isabel Merino, Sara Viña, and Francisco Palacios. "Regioselective Synthesis of 1-Alkyl-1-phenylhydrazines, 2-Alkyl-1-phenylhydrazines, and 1,2-Dialkyl-1-phenylhydrazines." Synthesis 1990, no. 05 (1990): 398–400. http://dx.doi.org/10.1055/s-1990-26885.

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22

Kilanowicz, Anna, and Małgorzata Skrzypińska-Gawrysiak. "Phenylhydrazine and its salts – calculated on phenylhydrazine. Documentation of proposed values of occupational exposure limits (OELs)." Podstawy i Metody Oceny Środowiska Pracy 34, no. 4(98) (2018): 113–48. http://dx.doi.org/10.5604/01.3001.0012.7950.

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Phenylhydrazine at room temperature is a colorless or yellow oily liquid, at lower temperatures it occurs in a form of a crystalline Phenylhydrazine is used in an organic synthesis as a powerful reducing agent or as an intermediate in synthesis of other chemical compounds, such as dyes and drugs. Phenylhydrazine is also used as a chemical reagent. At the beginning of the 20th century, phenylhydrazine was used as a drug in polycythemia vera and other blood disorders. Occupational exposure to phenylhydrazine and its salts may occur during the production, further processing and distribution of th

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23

Berger, Josef. "Phenylhydrazine haematotoxicity." Journal of Applied Biomedicine 5, no. 3 (2007): 125–30. http://dx.doi.org/10.32725/jab.2007.017.

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24

Čeřovský, Václav, and Karel Jošt. "Applicability of glutaminyl-tRNA cyclotransferase in the peptide synthesis." Collection of Czechoslovak Chemical Communications 50, no. 10 (1985): 2310–18. http://dx.doi.org/10.1135/cccc19852310.

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Peptides with amino-terminal glutamine and their derivatives on treatment with crude papain preparation, containing glutaminyl-tRNA cyclotransferase (E.C. 2.3.2.5.), are converted into the corresponding compounds with pyroglutamic acid. This enzymic cyclization does not take place with glutamic acid or its γ-derivatives. The reaction has been optimized for the preparation of pyroglutamic acid phenylhydrazide. Glutaminyl-leucine phenylhydrazide and glutaminyl-histidyl-proline amide reacted to give pyroglutamyl-leucine phenylhydrazide and TRH, respectively. Treatment of crude papain with iodoace

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25

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

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

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26

Obayuwana, E., and M. O. Obayuwana. "Ameliorative Effects of Aqueous Extract of Brassica nigra on Phenylhydrazine-Induced Liver Toxicity in Wistar Rats." Journal of Applied Sciences and Environmental Management 26, no. 4 (2022): 661–66. http://dx.doi.org/10.4314/jasem.v26i4.14.

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Brassica nigra has been reported to possess antioxidant activity, anti-inflammatory activity, anti-epileptic activity, antidiabetic activity, anthelminthic activity, nephroprotective activity and hepatoprotective activity. In experimental models, phenylhydrazine been used to cause reproductive toxicity, nephrotoxicity, hepatotoxicity, hyperbilirubinemia and haemolytic anaemia. This study therefore aimed to investigate the effects of B. nigra on phenylhydrazine-induced liver toxicity through analysis of liver enzymes and histoarchitecture of the liver. Thirty (30) adult Wistar rats weighing bet

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27

Soliman, Nabil, Sherif Mansour, Mohamed Ammar, Noura Hassan, and Rehab Mohamed. "Possible role of pomegranate fruit in reversing renal damage in rats exposed to Phenylhydrazine." Open Veterinary Journal 13, no. 10 (2023): 1268. http://dx.doi.org/10.5455/ovj.2023.v13.i10.5.

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Background: Pomegranate granatum (molasses and peels) and its constituents showed protective effects against natural toxins such as phenylhydrazine as well as chemical toxicants as arsenic, diazinon, and carbon tetrachloride. Aim: The current study was aimed to assess the effect of pomegranate molasses, white peel extract; red peel extract on nephrotoxicity induced by Phenylhydrazine. Methods: 80 male rats were divided to eight equal groups; a control group, pomegranate molasses pure group, White peel pomegranate pure group, red peel pomegranate pure group, Phenylhydrazine (PHZ) group, pomegra

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28

Korzhenevskaya, N. G., V. I. Rybachenko, V. V. Kovalenko, S. N. Lyashchuk, and A. N. Red’ko. "Phenylhydrazines. Structure and basicity." Russian Journal of Organic Chemistry 43, no. 10 (2007): 1475–80. http://dx.doi.org/10.1134/s1070428007100119.

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29

Umoren, E. B., I. A. Okon, C. Nyenke, E. Modo, N. Amadi, and P. I. Brown. "Jatropha tanjorensis Euphorbiaceae Ethanolic Leaves Extract Reverses Phenylhydrazine Induced Haematological Alterations in Albino Wistar Rats." European Journal of Nutrition & Food Safety 15, no. 5 (2023): 20–29. http://dx.doi.org/10.9734/ejnfs/2023/v15i51309.

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Introduction: Phenylhydrazine has been used in many studies to evaluate its modulatory effects in various biochemical parameters in whole blood and red blood cell lysate. Jatropha tanjorensis Euphorbiaceae have high antioxidants properties; its leaves phytochemical analysis shows the presence of flavonoids, tanins, terpenoids, saponis. This study investigated the ameliorative effects of Jatropha tanjorensis Euphorbiaceae on phenylhydrazine induced haematological alterations in albino Wistar rats.  Materials and Methods: Wistar rats of both sexes (180-200g) were divided into 4 groups (n=5

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30

Sihotang, Herlince. "Synthesis 2-((Furan-2-yl) Methylene)-1-Phenilhydrazone from Furfural Results of Corn Isolation and Its Utilization as Corrosion Inhibitor in Zinc (Zn) Metal." Journal of Chemical Natural Resources 3, no. 1 (2022): 35–42. http://dx.doi.org/10.32734/jcnar.v3i1.9335.

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Synthesis of 2-((furan-2-yl) methylene)-1-phenylhydrazone has been carried out by reaction of condensation of furfural aldehyde groups obtained from the isolation of corn cobs with phenylhydrazine. Furfural condensation with phenylhydrazine was carried out by refluxing in ethanol solvent for 1 hour. Of the 9.6 g (0.1 mol) furfural which was condensed with 5.4 g (0.05 mol) phenylhydrazine obtained yield of 10.54 g (67.02%) phenylhydrazone which was then analyzed by FT-IR spectroscopy showing the presence of vibration C = N in the area around 1597 cm-1. Fenilhidrazone was tested for inhibitor wi

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31

Obayuwana, E., E. O. Imafidon, D. E. Odiase, et al. "Effects of Aqueous Extract of Moringa oleifera on Phenylhydrazine-induced Liver Toxicity in Wistar Rats." Journal of Applied Sciences and Environmental Management 26, no. 5 (2022): 949–54. http://dx.doi.org/10.4314/jasem.v26i5.23.

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Moringa oleifera has been shown to have a variety of medicinal benefits, including hepatoprotective effects. Phenylhydrazine has been used to cause hepatotoxicity in experimental models. In this study, an aqueous extract of Moringa oleifera was used to evaluate the ameliorating properties of phenylhydrazine-induced liver damage by assessing liver enzymes and histoarchitecture employing twenty-five (25) mature Wistar rats were divided into five (5) groups. Group A received 1 ml distilled water, Group B received 50 mg/kg phenylhydrazine twice in 48 hours, Group C received 500 mg/kg body weight o

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32

Keyvanfard, Mohsen. "The Development of a New Inhibition Kinetic Spectrophotometric Method for the Determination of Phenylhydrazine Based on its Inhibitory Effect on Oxidation of Methyl Red by Bromate in Micellar Medium." E-Journal of Chemistry 7, no. 4 (2010): 1591–97. http://dx.doi.org/10.1155/2010/567832.

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A new, simple, sensitive and selective kinetic spectrophotometric method was developed for the determination of trace amounts of phenylhydrazine over the range of 0.02-0.30 μg/mL. The method is based on the inhibitory effect of phenylhydrazine on the oxidation of methyl red by bromate in acidic and micellar medium. The reaction was monitored spectrophotometrically by measuring the decrease in absorbance of methyl red at 518 nm with a fixed-time 0.5–2.0 min from initiation of the reaction..The relative standard deviation of 0.08 and 0.2 μg/mL phenylhydrazine was 1.7 and 2.4%, respectively. The

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33

Obazelu, P. A., and U. C. Odionyenma. "Haematological effect of a bi-herbal composition on phenyl hydrazine-induced anaemia in Albino Wistar rats." Dutse Journal of Pure and Applied Sciences 10, no. 3a (2024): 325–33. http://dx.doi.org/10.4314/dujopas.v10i3a.30.

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Picralima nitida and Cymbopogon citratus are plants known for their anti-inflammatory, antioxidant, and haematopoietic properties. This study aimed to determine the haematological effect of a dual herb composition of these plants on phenylhydrazine-induced anaemia in albino Wistar rats. Sixty adult male rats were divided into six groups: control, phenylhydrazine group, ferrous sulphate group, and three groups receiving phenylhydrazine plus 100 mg/kg, 200 mg/kg, and 400 mg/kg of the extract. Haematological parameters were measured using an autoanalyzer and analyzed with SPSS software V22. The r

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34

Keyvanfard, M., and Kh Alizad. "A Spectrophotometric Flow Injection Method for Determination of Ultratrace Amounts of Phenylhydrazine by Its Inhibition Effect on the Reaction of Thionin and Nitrite." Journal of Chemistry 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/258605.

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A simple flow injection colorimetric procedure for determining phenylhydrazine was established. It is based on the reaction of phenylhydrazine in sulfuric acid with thionin and sodium nitrite. Reaction was monitored spectrophotometrically by measuring thionin absorbance atλmax=602 nm. A standard or sample solution was injected into the sulfuric acid stream, which was then merged with sodium nitrite stream and thionin stream. Optimum conditions for determining phenylhydrazine were investigated by univariate method. Under the optimum conditions, a linear calibration graph was obtained over the r

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35

Steinebach, Vincent, Govardus A. H. Jong, Sybren S. Wijmenga, Simon Vries, and Johannis A. Duine. "The Copper-topaquinone-phenylhydrazine-adduct Geometry in Escherichia coli Amine Oxidase Derivatized with Phenylhydrazines Substituted with Trifluoromethyl Groups, as Determined with 19F-NMR Relaxation Measurements." European Journal of Biochemistry 238, no. 3 (1996): 683–89. http://dx.doi.org/10.1111/j.1432-1033.1996.0683w.x.

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36

Kroll, M. H., A. J. Jackson, and R. J. Elin. "Cefoxitin interferes with the "Clini-Skreen" column method for urinary 17-hydroxycorticosteroids." Clinical Chemistry 33, no. 7 (1987): 1219–22. http://dx.doi.org/10.1093/clinchem/33.7.1219.

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Abstract Cefoxitin interferes with determination of urinary 17-hydroxycorticosteroids. The apparent concentration of hormone is increased from three- to 10-fold in samples from patients receiving cefoxitin when the Amberlite XAD-2 "Clini-Skreen" column is used. To determine the mechanism of interference, we reacted aqueous solutions of cefoxitin, cortisol, cortisone, and 11-deoxycortisol with phenylhydrazine; recorded the adsorption spectra; and determined the molar absorptivities and the equilibrium and rate constants. Also, we recorded the absorption spectra of phenylhydrazine with eight oth

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37

(Miss), B. SARANGI, K. MISRA B., and B. BEHERA G. "Kinetic Studies of the Formation of Dithizone. Part-I. Alkali assisted Conversion of Phenylhydrazinium Phenylhydrazine Dithiocarbamate and Diphenylthiocarbazide." Journal of Indian Chemical Society Vol. 62, Dec 1985 (1985): 979–82. https://doi.org/10.5281/zenodo.6325060.

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Department of Chemistry, Sambalpur University, Burla-768 019 The kinetics of formation of dithizone (3) from phenylhydrazinium phenylhydrazine dithiocarbamate (1) and from phenylthiocarbazide (2) has been studied. The synthetic aspect of the formation of dithizone from phenylhydrazine and carbon disulphide has also been worked out. A mechanism for the formation of dithizone from 1 and 2 has been proposed.

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38

Plater, M. John. "Shaken, not stirred: a schools test for aldehydes and ketones." Journal of Chemical Research 44, no. 1-2 (2019): 104–7. http://dx.doi.org/10.1177/1747519819886491.

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A schools test for aldehydes and ketones in water at room temperature using test tubes has been developed in this laboratory using either phenylhydrazine hydrochloride or phenylhydrazine hydrochloride with NaOAc . 3H2O. The role of one equivalent of a strong or weak acid which catalyses the reaction is discussed.

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39

Afsah, Elsayed M., Ez-el-Din M. Kandeel, Mona M. Khalifa, and Waleed M. Hammouda. "Mannich Bases as Synthetic Intermediates: Synthesis of 3- and 4-Functionalized 2-Pyrazolines." Zeitschrift für Naturforschung B 62, no. 4 (2007): 540–48. http://dx.doi.org/10.1515/znb-2007-0409.

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The reaction of styryl ketonic Mannich bases 2a - c with phenylhydrazine leads to 3-functionalized 2-pyrazolines 4 or 6 depending on the reaction conditions. 3-[β -(Arylamino)ethyl]-2-pyrazolines 8a,b were obtained via transamination between the methiodide salt 7 and primary arylamines. Treatment of 1-(p-anisyl)-1,2,5-tri(N-piperidino)pentan-3-one (11) with phenylhydrazine affords the 3,4-difunctionalized 2-pyrazoline 12. The reactions of the keto bases 19 or 21 with hydrazines lead to 4-functionalized 2-pyrazolines 20 and 22, the N-Mannich bases 23 and 24 are obtained from 22a. The synthesis

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MAZUMDAR, Abhijit, Subrata ADAK, Ratna CHATTERJEE, and Ranajit K. BANERJEE. "Mechanism-based inactivation of lacrimal-gland peroxidase by phenylhydrazine: a suicidal substrate to probe the active site." Biochemical Journal 324, no. 3 (1997): 713–19. http://dx.doi.org/10.1042/bj3240713.

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Humans are exposed to various hydrazine derivatives for therapeutic control of several diseases, and mammalian peroxidases are implicated in the oxidative metabolism of many drugs. The results presented here indicate that lacrimal-gland peroxidase is irreversibly inactivated in a mechanism-based way by phenylhydrazine, which acts as a suicidal substrate in the presence of H2O2. The pseudo-first-order kinetic constants for inactivation at pH 5.5 are Ki=18 μM, kinact=0.25 min-1 and τ50=2.75 min, with a second-order rate constant of 0.75×104 M-1·min-1. Approx. 27 mol of phenylhydrazine and 54 mol

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Jankowiak, Aleksandra, and Piotr Kaszyński. "Synthesis of oleophilic electron-rich phenylhydrazines." Beilstein Journal of Organic Chemistry 8 (February 20, 2012): 275–82. http://dx.doi.org/10.3762/bjoc.8.29.

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Phenylhydrazines 1 substituted with two or three long-chain alkyl, alkoxy or alkylsulfanyl groups were successfully prepared by acid-induced removal of the Boc group in hydrazides 2. The reaction is carried out with 5 equivalents of TfOH in CF3CH2OH/CH2Cl2 at −40 °C for 1.5 min. Under these conditions, the deprotected hydrazine 1 is fully protonated, which increases its stability in the reaction medium. The hydrazines were isolated in 60–86% yields and purities >90%. The hydrazides 2 were obtained in 43–71% yields from aryl bromides 5, which were lithiated with t-BuLi and subsequently react

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Bandgar, B. P., and L. S. Uppalla. "Novel Chemoselective Reduction of Aryldiazonium Fluoroborates with Zn-NiCl2.6H2O-THF." Journal of Chemical Research 23, no. 12 (1999): 714–15. http://dx.doi.org/10.1177/174751989902301215.

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Chauhan, Parul, Makthala Ravi, Shikha Singh, et al. "Palladium and copper-catalyzed ligand-free coupling of phenylhydrazines in water." RSC Adv. 4, no. 82 (2014): 43336–40. http://dx.doi.org/10.1039/c4ra04621h.

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Zhang, Lei, Junyu Chen, Xiahe Chen, et al. "Rh(iii)-catalyzed, hydrazine-directed C–H functionalization with 1-alkynylcyclobutanols: a new strategy for 1H-indazoles." Chemical Communications 56, no. 54 (2020): 7415–18. http://dx.doi.org/10.1039/c9cc08884a.

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Wang, Ting, Xushun Qing, Chenlu Dai, Zhenjie Su та Cunde Wang. "Regioselective construction of 1,3-diaryl tetrahydroindazolones via the three-component reaction of 1,3-cyclohexanediones, β-nitrostyrenes and arylhydrazines". Organic & Biomolecular Chemistry 16, № 14 (2018): 2456–63. http://dx.doi.org/10.1039/c8ob00304a.

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1,5,6,7-Tetrahydro-4H-indazol-4-one derivatives were synthesized effectively via the regioselective three-component reactions of substituted β-nitrostyrenes, 1,3-cyclohexanediones and phenylhydrazines.

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Chauhan, Parul, Makthala Ravi, Shikha Singh, Prashant Prajapati та Prem P. Yadav. "Regioselective α-arylation of coumarins and 2-pyridones with phenylhydrazines under transition-metal-free conditions". RSC Advances 6, № 1 (2016): 109–18. http://dx.doi.org/10.1039/c5ra20954d.

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Ousaaid, Driss, Asmae El Ghouizi, Hassan Laaroussi, et al. "Anti-Anemic Effect of Antioxidant-Rich Apple Vinegar against Phenylhydrazine-Induced Hemolytic Anemia in Rats." Life 12, no. 2 (2022): 239. http://dx.doi.org/10.3390/life12020239.

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This study aims to examine the ability of apple vinegar on phenylhydrazine (PHZ)-induced hemolytic anemia in Wistar rats. In vitro, phenolic and flavonoid content and antioxidant activity were determined. In vivo, phenylhydrazine (10 mg/kg) was injected intravenously into rats for 4 days and then treated with apple vinegar daily by gavage (1 mL/kg) for five weeks. high level of polyphenols and flavonoids (90 ± 1.66 mg GAE/100 mL and 7.29 ± 0.23 mg QE/100 mL, respectively) were found in the apple vinegar which gives it a good ability to scavenge free radicals (TAC = 4.22 ± 0.18 mg AAE/100 mL an

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Li, Jiaxin, Eyoro Noah Nadine Joelle, Qian Yang, Feng Zheng, Wenyuan Liu, and Jing Liu. "Determination of residual phenylhydrazines in drug substances by high-performance liquid chromatography with pre-column derivatization." Analytical Methods 11, no. 48 (2019): 6146–52. http://dx.doi.org/10.1039/c9ay02231g.

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Malviya, Vidhiya, R. K. Patil, and Anil Nagle. "AN EXPERIMENTAL STUDY ON TWO SAMPLES OF KASIS GODANTI BHASMA PREPARED BY DIFFERENT METHODS W.S.R. TO ANEMIA." International Ayurvedic Medical Journal 09, no. 1 (2021): 53–62. http://dx.doi.org/10.46607/iamj.0809012021.

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Introduction: The exploration of pharmacological effect on Ayurvedic drugs are only possible through ani-mal experimentation. For the global acceptance of the Kasis Godanti Bhasma (KGB) - A herbo-mineral for-mulation of Ayurveda pharmaceutics, there is needs to revalidate the formulation on all aspects from its safety, efficacy, quality control and animal experimentation. Aims and Objectives: 1. To evaluate the effi-cacy of Kasis Godanti Bhasma 1st and 2nd in Pandu (Anemia). 2. To compare the effectiveness of Kasis Go-danti Bhasma 1st and Kasis Godanti Bhasma 2nd in Pandu (Anemia). Material an

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Tunc˛, Tuncay, Habibe Tezcan, Musa Sarı, Orhan Büyükgüngör, and Rahmi Yaǵbasan. "N-(4-Nitrobenzylidene)-N′-phenylhydrazine." Acta Crystallographica Section C Crystal Structure Communications 59, no. 9 (2003): o528—o529. http://dx.doi.org/10.1107/s0108270103016019.

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