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Journal articles on the topic '4-Bromoacetophenone'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Galstyan, A., A. Bushuyev, A. Krasilnikova, and M. Zhurba. "The oxidation of 4-bromacetophenone by ozone in acetic acid." Voprosy Khimii i Khimicheskoi Tekhnologii, no. 5 (October 2021): 37–42. http://dx.doi.org/10.32434/0321-4095-2021-138-5-37-42.

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The kinetics and mechanism of oxidation of 4-bromoacetophenone by ozone in acetic acid solution have been studied. It was shown that 77% of the starting material is oxidized by the benzene ring; 8% of 4-bromobenzoic acid and small amounts of carbon (IV) oxide were identified among the side chain ozonation products. The main reaction products are aliphatic peroxide compounds, which have in their structure one hydroperoxide group. Manganese (II) acetate was shown to be the most effective catalyst for the side chain reaction of 4-bromoacetophenone in acetic acid. High selectivity for the side cha

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2

Wender, Paul A., and Raok Jeon. "Bromoacetophenone-Based Photonucleases: Photoinduced Cleavage of DNA by 4‘-Bromoacetophenone−Pyrrolecarboxamide Conjugates." Organic Letters 1, no. 13 (1999): 2117–20. http://dx.doi.org/10.1021/ol9903279.

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3

Lopes, Raquel de Oliveira, Joyce Benzaquem Ribeiro, Aline de Souza Ramos, et al. "Highly enantioselective bioreduction of 4-bromoacetophenone." Tetrahedron: Asymmetry 22, no. 18-19 (2011): 1763–66. http://dx.doi.org/10.1016/j.tetasy.2011.10.014.

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4

Trivedi, Mahendra Kumar, Alice Branton, Dahryn Trivedi, Gopal Nayak, Gunin Saikia, and Snehasis Jana. "Characterization of Physico-Chemical and Spectroscopic Properties of Biofield Energy Treated 4-Bromoacetophenone." American Journal of Physical Chemistry 4, no. 4 (2015): 30–37. https://doi.org/10.11648/j.ajpc.20150404.11.

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4-Bromoacetophenone is an acetophenone derivative known for its usefulness in organic coupling reactions and various biological applications. The aim of the study was to evaluate the impact of biofield energy treatment on 4-bromoacetophenone using various analytical methods. The material is divided into two groups for this study i.e. control and treated. The control group remained as untreated and the treated group was subjected to Mr. Trivedi’s biofield energy treatment. Then, both the samples were characterized using X-ray diffraction (XRD), differential scanning calorimetry (DSC), the

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5

Trivedi, Mahendra Kumar, Alice Branton, Dahryn Trivedi, Gopal Nayak, Gunin Saikia, and Snehasis Jana. "Characterization of Physico-Chemical and Spectroscopic Properties of Biofield Energy Treated 4-Bromoacetophenone." American Journal of Physical Chemistry 4, no. 4 (2015): 30–37. https://doi.org/10.5281/zenodo.168163.

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4-Bromoacetophenone is an acetophenone derivative known for its usefulness in organic coupling reactions and various biological applications. The aim of the study was to evaluate the impact of biofield energy treatment on 4-bromoacetophenone using various analytical methods. The material is divided into two groups for this study i.e. control and treated. The control group remained as untreated and the treated group was subjected to Mr. Trivedi’s biofield energy treatment. Then, both the samples were characterized using X-ray diffraction (XRD), differential scanning calorimetry (DSC), the

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6

Skorokhod, K. S., and A. G. Galstyan. "Kinetics of catalytic oxidation 4-bromethylbenzene by ozone in acetic acid." Catalysis and petrochemistry, no. 30 (2020): 83–89. http://dx.doi.org/10.15407/kataliz2020.30.083.

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The kinetic regularities of catalytic oxidation of 4-bromoethylbenzene by ozone to create an eco-logical, low-temperature technology for the synthesis of 4-bromoacetophenone have been studied. The experiment was performed in a glass reactor with a porous membrane under conditions of kinetic regime at a temperature of 293-333 K. The concentration of ozone in the gas phase was determined by spectrophotometric method. Analysis of 4-bromoacetophenone and its oxidation products was performed by gas-liquid chromatography. Oxidation of 4-bromoethylbenzene by ozone in a solution of acetic acid at a te

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7

Jeon, Raok, and Paul A. Wender. "Photocleavage of DNA by 4′-bromoacetophenone analogs." Archives of Pharmacal Research 24, no. 1 (2001): 39–43. http://dx.doi.org/10.1007/bf02976491.

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8

Fischer, Andreas, H. S. Yathirajan, B. V. Ashalatha, B. Narayana, and B. K. Sarojini. "(2E)-3-(Biphenyl-4-yl)-1-(4-bromophenyl)prop-2-en-1-one." Acta Crystallographica Section E Structure Reports Online 63, no. 3 (2007): o1355—o1356. http://dx.doi.org/10.1107/s1600536807006915.

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The title compound, C21H15BrO, was obtained from 4-bromoacetophenone and biphenyl-4-carbaldehyde. The geometry of the molecule is unexceptional. The compound crystallizes isostructurally with the corresponding chloro compound.

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9

Bahrin, Lucian Gabriel, Catalin Neculai Lungu, Iuliean Vasile Asaftei, and Ion Sandu. "Synthesis of 4-(4-Hydroxyaryl)-1,3-Dithiolium Perchlorates." Revista de Chimie 70, no. 2 (2019): 527–31. http://dx.doi.org/10.37358/rc.19.2.6949.

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4-(3,5-Dibromo-4-hydroxyphenyl)-2-(N,N-dialkylamino)-1,3-dithiol-2-ylium perchlorates have been synthesized by acid catalyzed cyclocondensation of 1-(3,5-dibromo-4-hydroxyphenyl)-1-oxaethan-2-yl dithiocarbamates. The latter compounds have been obtained from the reaction of the corresponding substituted w-bromoacetophenone with various salts of dithiocarbamic acids.

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10

Chanysheva, A. R., N. V. Privalov, and V. V. Zorin. "Stereodirected Biocatalyzed Reduction of 4-Bromoacetophenone in (R)-(+)-1-(4-Bromophenyl)ethanol." Russian Journal of General Chemistry 94, no. 13 (2024): 3639–42. https://doi.org/10.1134/s1070363224130255.

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11

Xu, Beihua, and Yongzhou Hu. "A Facile synthesis of 2-Methyl-1,2,3-Triazoles." Journal of Chemical Research 2003, no. 2 (2003): 96–97. http://dx.doi.org/10.3184/030823403103173084.

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Reaction of α-bromoacetophenone bearing various substituents on the benzene rings with methylhydrazine in refluxing acetic acid afforded 2-methyl-4-phenyl-1,2,3-triazoles. The relation between the substituents and the yields is briefly discussed.

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12

Ovonramwen, Oluwaseyi B. "Synthesis of 1-(2,4-Dinitrophenyl)-3,5-diphenyl-1H-pyrazol-4-ol via trans-1,3-Diphenyl-2,3-epoxy-1-propanone." Tanzania Journal of Science 47, no. 3 (2021): 1243–51. http://dx.doi.org/10.4314/tjs.v47i3.32.

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The trans-1,3-diphenyl-2,3-epoxy-1-propanone was synthesized from benzaldehyde and 2-bromoacetophenone in 20 min which is more economical. The presence of ethanol and Br in 2-bromoacetophenone facilitated the reaction. The vicinal diaxial coupling constant of trans-1,3-diphenyl-2,3-epoxy-1-propanone was zero, an indication of trans configuration for a rigid 3-membered ring at ~90o dihedral angle. 1-(2,4-Dinitrophenyl)-3,5-diphenyl-1H-pyrazol-4-ol was synthesized from trans-1,3-diphenyl-2,3-epoxy-1-propanone and 2,4-dinitro phenylhydrazine in glacial CH3COOH to give 85.5% yield and characterize

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13

Shakhmaev, R. N., A. R. Chanysheva, A. U. Ishbaeva, S. S. Vershinin, and V. V. Zorin. "Microwave enhancement of arylation of activated olefins with 4-bromoacetophenone." Russian Journal of Organic Chemistry 46, no. 3 (2010): 455–56. http://dx.doi.org/10.1134/s1070428010030280.

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14

Jovanovic, S. V., J. Renaud, A. B. Berinstain, and J. C. Scaiano. "Kinetic study of the reactions of methoxy-substituted phenacyl radicals." Canadian Journal of Chemistry 73, no. 2 (1995): 223–31. http://dx.doi.org/10.1139/v95-031.

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The photochemistry of various mono- and dimethoxy-substituted α-bromoacetophenones has been investigated by laser flash photolysis in organic solvents. The short-lived excited singlet states cleave to yield bromine atoms and the corresponding methoxyphenacyl radicals with quantum yields ranging from 0.13 to 0.35. With the exception of 4-methoxy-α-bromoacetophenone (6), all other substrates yield readily detectable triplet states; these have π,π* character and are very poor hydrogen abstractors. Triplet decay does not contribute to methoxyphenacyl radical formation. While methoxyphenacyl radica

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15

Jasril, Jasril, Hilwan Yuda Teruna, Adel Zamri, Darian Alfatos, Elka Yuslinda, and Yuana Nurulita. "Sintesis dan Uji Antibakteri Senyawa Bromo Kalkon Piridin." Jurnal Natur Indonesia 14, no. 3 (2013): 172. http://dx.doi.org/10.31258/jnat.14.3.172-175.

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Three pyridine chalcones including (Z)-1-(4-bromophenyl)-3-(pyridin-2-yl)prop-2-en-1-one (1), (Z)-1-(4-bromophenyl)-3- (pyridin- 3-yl)prop-2-en-1-one (2) and (Z)-1-(4-bromophenyl)-3-(pyridin-4-yl)prop-2-en-1-one (3) were synthesized by aldol condensation reactions from pyridinecarbaldehyde with 4-bromoacetophenone. In antibacterial assay, compound 3 exhibited strong activity against Staphylococcus aureus, Bacillus subtilis and Escherichia coli with the inhibition zone of 19.9; 19.5, and 17.5 mm, respectively.

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16

Jeon, Raok, and Paul A. Wender. "Design and synthesis of new DNA photocleavers, 4′-bromoacetophenone-pyrrolecarboxamide hybrid compounds." Archives of Pharmacal Research 23, no. 6 (2000): 585–88. http://dx.doi.org/10.1007/bf02975245.

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17

Shakhmaev, R. N., A. R. Chanysheva, A. U. Ishbaeva, S. S. Vershinin, and V. V. Zorin. "ChemInform Abstract: Microwave Enhancement of Arylation of Activated Olefins with 4-Bromoacetophenone." ChemInform 41, no. 34 (2010): no. http://dx.doi.org/10.1002/chin.201034035.

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18

Gorodea, Ioana Aurelia, Ion Sandu, and Laura Gabriela Sarbu. "Novel 4-(3-Bromo-2-hydroxy-5-methylphenyl)-1,3-Dithiol-2-ylidene Derivatives." Revista de Chimie 68, no. 9 (2017): 1988–91. http://dx.doi.org/10.37358/rc.17.9.5807.

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Novel 4-(3-bromo-2-hydroxy-5-methylphenyl)-1,3-dithiol-2-ylidene derivatives have been synthesized from the reaction of the corresponding 1,3-dithiol-2-ylium salts with various methylene active compounds using DBU as base. The 1,3-dithiol-2-ylium compounds have been obtained from the reaction of the substituted w-bromoacetophenone with various salts of dithiocarbamic acids. The newly obtained derivatives were characterized by NMR spectrometry, UV-Vis and IR spectroscopy.

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19

Mamedov, Ibrahim, Uwe Eichhoff, Abel Maharramov, Musa Bayramov, and Yegana Mamedova. "Molecular dynamics of (Z)-1-(2-hydroxy-5-methyl-3-nitrophenyl)ethanone oxime and (E)-2-hydroxy-5-methylacetophenone thiosemicarbazone in solution studied by NMR spectroscopy." Open Chemistry 10, no. 1 (2012): 241–47. http://dx.doi.org/10.2478/s11532-011-0135-2.

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AbstractThe formation of hydrogen bonds and the molecular dynamics for molecules (Z)-1-(2-hydroxy-5-methyl-3-nitrophenyl)ethanone oxime and (E)-2-hydroxy-5-methylacetophenone thiosemicarbazone, (E)-4-bromoacetophenone thiosemicarbazone have been investigated in solution using NMR. The results confirm the formation of different O-H…O type intramolecular hydrogen bonds in the oxime molecule. The rotational barrier energy and energy of intramolecular hydrogen bonds have been determined.

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20

McClelland, Robert A., V. M. Kanagasabapathy та N. Mathivanan. "Kinetics of breakdown of aryl hemiacetals of α-bromoacetophenone. Effect of phenol leaving groups on the lifetimes of tetrahedral intermediates". Canadian Journal of Chemistry 69, № 12 (1991): 2084–93. http://dx.doi.org/10.1139/v91-301.

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The kinetics of breakdown of seven aryl hemiacetals of α-bromoacetophenone (TOH) have been examined, with aryl substituents 4-MeO, 4-Me, 3-Me, H, 3-MeO, 4-Cl, 3-Cl. The hemiacetals were generated as intermediates in the aqueous bromination of α-aryloxystyrenes, where the breakdown of the hemiacetal is the rate-limiting stage in the overall reaction. Base catalysis of the breakdown shows large Brønsted β values (0.8–1.0) and similarly large βlg values (−0.8 to −1.0). These are argued to arise because of a preassociation mechanism in which the hydrogen-bonded intermediate [Formula: see text] los

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21

Kumar Trivedi, Mahendra. "Characterization of Physico-Chemical and Spectroscopic Properties of Biofield Energy Treated 4-Bromoacetophenone." American Journal of Physical Chemistry 4, no. 4 (2015): 30. http://dx.doi.org/10.11648/j.ajpc.20150404.11.

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22

Sud, Abhishek, Raj M. Deshpande, and Raghunath V. Chaudhari. "Kinetics of vinylation of 4′-bromoacetophenone with n-butyl acrylate using palladacycle catalyst." Journal of Molecular Catalysis A: Chemical 270, no. 1-2 (2007): 144–52. http://dx.doi.org/10.1016/j.molcata.2007.01.035.

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23

Štetinová, Jarmila, Martina Lojkásková, Miloslava Dandárová, Ján Leško, and Rudolf Kada. "Reactions of Substituted 5-Nitro-3-furoylthioureas." Collection of Czechoslovak Chemical Communications 61, no. 2 (1996): 305–12. http://dx.doi.org/10.1135/cccc19960305.

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Some cyclization and cyclocondensation reactions of 1-(5-nitro-3-furoyl)-3-(4-R-phenyl)thioureas 1a-1e (R = H, CH3, N(C2H5)2, Br, CN) were conducted. 6-R-2-(5-Nitro-3-furoylamino)benzothiazoles 2a-2c (R = H, CH3, Br) were obtained by bromine-induced cyclization of the corresponding thioureas. Reacted with bromoacetone and ω-bromoacetophenone, respectively, the derivatives 1a-1e gave 2-(4-R-phenylimino)-3-(5-nitro-3-furoyl)-4-R1-4-thiazolines 3a-3e (R = H, CH3, N(C2H5)2, Br, CN; R1 = CH3) and 3f-3j (R = H, CH3, N(C2H5)2, Br, CN; R1 = C6H5), respectively. The structure of the compounds synthesiz

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24

Mekky, Athraa H., and Abeer M. Jasem. "Synthesis and Antioxidant Evaluation of Few Heterocyclic Derivatives." INTERNATIONAL JOURNAL OF DRUG DELIVERY TECHNOLOGY 12, no. 04 (2022): 1787–91. http://dx.doi.org/10.25258/ijddt.12.4.49.

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A series of novel heterocyclic derivatives [A1-A7] have been synthesized by the alkylation reaction of the (SH, NH, OH) of various heterocyclic (oxadiazole, thiadiazole,4-hydroxy coumarin and benzothiazole) with chloro acetone or 2-bromoacetophenone. The resulting percentage yield of synthesized compound was relatively (69-85%). The producing compounds have been identified by infrared radiation (IR), proton nuclear magnetic resonance (1H-NMR), Carbon-13 nuclear magnetic resonance (13C-NMR) spectroscopy, and the quantities of various physical properties (melting point, crystal shape, and color)

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25

Mphahlele, Malose J., Samantha Gildenhuys, and Sizwe J. Zamisa. "Synthesis, Structure and Evaluation of the N-(2-Acetyl-4-(styryl)phenyl)-4-benzenesulfonamide Derivatives for Anticholinesterase and Antioxidant Activities." Crystals 11, no. 4 (2021): 341. http://dx.doi.org/10.3390/cryst11040341.

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N-(2-Acetyl-4-bromophenyl)-4-methylbenzenesulfonamide (2) was transformed into 5-(4-methoxymethylstyryl)-2-(p-tolylsulfonamido)acetophenone (3a) and 5-(4- trifluoromethylstyryl)-2-(p-tolylsulfonamido)acetophenone (3b). Their structures were determined using a combination of NMR (1H & 13C) and mass spectroscopic as well as single crystal X-ray diffraction techniques. These compounds and the corresponding precursor, 2-amino-5-bromoacetophenone (1), were evaluated through enzymatic assays in vitro for inhibitory effect against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) activ

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26

Kishimoto, Takao, Yasumitsu Uraki та Makoto Ubukata. "Synthesis of Bromoacetophenone Derivatives as Starting Monomers for β-O-4 Type Artificial Lignin Polymers". Journal of Wood Chemistry and Technology 28, № 2 (2008): 97–105. http://dx.doi.org/10.1080/02773810802124894.

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27

Mägerlein, Wolfgang, Matthias Beller, and Adriano F. Indolese. "Palladium-catalyzed carbonylation of aryl halides — a detailed investigation of the alkoxycarbonylation of 4-bromoacetophenone." Journal of Molecular Catalysis A: Chemical 156, no. 1-2 (2000): 213–21. http://dx.doi.org/10.1016/s1381-1169(99)00400-8.

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28

Narwanti, Iin, and Hanna Nur Aisyah Afifah. "Conventional and Microwave-Assisted Synthesis of 4’-Bromochalchone Utilizing 4-Bromoacetophenone and Benzaldehyde as Starting Material in Alkaline Condition." JKPK (Jurnal Kimia dan Pendidikan Kimia) 7, no. 3 (2022): 346. http://dx.doi.org/10.20961/jkpk.v7i3.66765.

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<p>This study focuses on synthesizing 4’-bromochalcone through conventional and irradiation microwave methods to determine each method's time efficiency and yield. 4-Bromoacetophenone was treated with benzaldehyde in the presence of a base. Conventionally, the reaction mixture was stirred at room temperature. While in the microwave irradiation method, the reaction mixture was irradiated at a power of 140 watts. The compound was identified, including the melting point and physicochemical properties. The structure of the compound was confirmed by infrared, <sup>1</sup>H- and &l

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29

Pfeiffer, Wolf-Diethard, Helmut Gille, Ehrenfried Bulka, Ashot Saghyan, and Peter Langer. "Cyclocondensations of Substituted Thiosemicarbazides with 2-Bromo- 1,2-diphenylethan-1-one." Zeitschrift für Naturforschung B 68, no. 7 (2013): 823–30. http://dx.doi.org/10.5560/znb.2013-3036.

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The cyclocondensation of 4-methylthiosemicarbazide with 2-bromo-1,2-diphenylethan-1-one in ethanol afforded isomeric 2-methylamino-5,6-diphenyl-6H-3,4-thiadiazine and 2-hydrazono-3- methyl-4,5-diphenyl-2,3-dihydro-1,3-thiazole. A pyrazole was obtained by cyclocondensation and subsequent desulfurization of the thiadiazine when the reaction was carried out in concentrated hydrochloric acid. A chemical proof of the structures has been provided. The product distribution of the cyclizations strongly depends on the substitution pattern of the starting materials, and the cyclizations of methylthiosem

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30

Boukhallout, Fath Eddine, Mohamed Dehamchia, Samir Bayou, Chaima Adaika, Abdelhafeez M. A. Mohammed, and Zine Regainia. "Synthesis and biological activity of new imidazo[1,2-c]pyrimidin-5(6H)-one, imidazo[2,1-b]purin-4(5H)-one and imidazo[2,1-i]purine as antioxidant and antibacterial agents." INDIAN JOURNAL OF HETEROCYCLIC CHEMISTRY 34, no. 03 (2024): 421. http://dx.doi.org/10.59467/ijhc.2024.34.421.

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This paper investigates the antioxidant and antibacterial applications of new fusedimidazo[1,2-c]pyrimidin- 5(6H)-one, imidazo[2,1-i]purine,andimidazo[2,1-b]purin-4(5H)-one synthesized by the reaction of a-bromoacetophenone with nucleobases (adenine, guanine, and cytosine). The newly synthesized compounds were structurally confirmed using spectral studies and elemental analysis. All the products were screened for their antioxidant capacity by applying the methods of scavenging free radicals (ABTS and DPPH). The antibacterial activity was examined against three bacterial strains: Pseudomonas ae

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31

Schubert, Karsten, Helmar Görls та Wolfgang Weigand. "β-Hydroxydithiozimtsäurederivate als Liganden. Synthese und Charakterisierung neuartiger 1,1-Ethendithiolato- und O,S-Chelatkomplexe / Derivatives of β -Hydroxydithiocinnamic Acids as Ligands. Syntheses and Characterisation of Novel 1,1-Ethenedithiolato and O,S-Chelate Complexes". Zeitschrift für Naturforschung B 62, № 3 (2007): 475–82. http://dx.doi.org/10.1515/znb-2007-0323.

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Starting from 4-bromoacetophenone 1, the 4-bromo-β -hydroxydithiocinnamic acid 2 and the 4-bromo-β -hydroxydithiocinnamic acid hexyl ester 3 were prepared using carbon disulfide and potassium-tert-butylate as a base. Acting as a ligand, the acid gives 1,1-ethenedithiolato complexes with (Ph3P)2Pt(II) (4a), (Et3P)2Pt(II) (4b), dppePt(II) (4c), (Ph3P)2Pd(II) (4d), dppePd(II) (4e), and dppeNi(II) (4f). In contrast to the acid, the deprotonated ester 3 forms a monoanionic bidentate ligand. [O,S] Complexes of Pt(II) (5a), Pd(II) (5b) and Ni(II) (5c) were obtained. All complexes have been fully char

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32

Ivanova, A. E., O. G. Khudina, Ya V. Burgart, et al. "6-Trifluoromethyl-2-thiouracil and its analogs in reactions with 4-bromobutyl acetate and 2-bromoacetophenone." Russian Chemical Bulletin 68, no. 6 (2019): 1190–95. http://dx.doi.org/10.1007/s11172-019-2538-8.

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33

Nair, Ambily P., and J. Christine. "2-Hydroxy-4-n-propoxy-5-bromoacetophenone oxime as an Analytical Reagent for Gravimetric Determination of V(V)." E-Journal of Chemistry 6, no. 2 (2009): 303–7. http://dx.doi.org/10.1155/2009/129832.

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2-Hydroxy-4-n-propoxy-5-bromoacetophenone oxime (HnPBAO) was developed as a new analytical reagent for the gravimetric determination of pentavalent vanadium ion. In the pH range 4.0-6.0, the reagent gave a brown coloured precipitate with V(V). Job’s method and Mole ratio method revealed that the stoichiometry of the complex is 1:1 (metal: ligand). Beer’s law is obeyed up to 20.38 ppm of V(V). Molar absorptivity and Sandells sensitivity at 450 nm were found to be 10.22 × 102L/mol/cm and 0.049 µg/cm2respectively. The stability constant of V(V)-HnPBAO complex is found to be 1.195 × 106. Gibb’s fr

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34

Bensaid, Souhila, and Henri Doucet. "Influence of the solvent and of the reaction concentration for palladium-catalysed direct arylation of heteroaromatics with 4-bromoacetophenone." Comptes Rendus Chimie 17, no. 12 (2014): 1184–89. http://dx.doi.org/10.1016/j.crci.2014.02.004.

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35

Temel, Halide Edip, Gülşen Akalın Çiftçi, and Leyla Yurttaş. "Screening of new morpholine dithiocarbamate derivatives bearing benzimidazole moiety for anticholinesterase potential." European Journal of Life Sciences 2, no. 2 (2023): 71–77. http://dx.doi.org/10.55971/ejls.1328405.

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Alzheimer’s disease (AD) is basically associated with disturbances of cholinesterase metabolism which result in acetylcholine deficiency. Target of acetylcholinesterase (AChE) inhibitors used in symptomatic therapy of disease is to increase of ACh levels. Consequently, cholinesterase inhibitors were developed to increase acetylcholine is to inhibit AChE and butrylcholinesterase (BuChE). Studies demonstrate the clinical importance of dual inhibitors that inhibit not only the acetylcholinesterase enzyme but also the butyrylcholinesterase enzyme. In recent years, benzimidazoles have attracted par

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36

Awad, Hussein, and Shaimaa A. Bahgat. "Synthesis, Identification, Biological Evaluation of Seven-membered Heterocyclic Derivatives from 2,3-di Chloroaniline." INDIAN JOURNAL OF HETEROCYCLIC CHEMISTRY 34, no. 01 (2024): 131. http://dx.doi.org/10.59467/ijhc.2024.34.131.

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This study?s focus was centered on the synthesis of heterocyclic compounds incorporating a seven-membered ring, specifically 1,3-oxazepine. The initial phase of the synthesis involved the preparation of azo compound (1) through the coupling of the diazonium salt of 2,3-dichloroaniline with 4-bromoacetophenone in an alkaline alcoholic medium. This was then succeeded by the reaction of azo compound (1) with 4-nitroaniline and 4-methoxyaniline in absolute ethanol, employing glacial acetic acid as a catalyst, resulting in Schiff base derivatives (2) and (3), respectively. Subsequent to this, Schif

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37

Hassan, Alaa A., Nasr K. Mohamed, Ashraf A. Aly, et al. "Synthesis and Antiproliferative Potential of Thiazole and 4-Thiazolidinone Containing Motifs as Dual Inhibitors of EGFR and BRAFV600E." Molecules 28, no. 24 (2023): 7951. http://dx.doi.org/10.3390/molecules28247951.

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Thiazole and thiazolidinone recur in a wide range of biologically active compounds that reach different targets within the context of tumors and represent a promising starting point to access potential candidates for treating metastatic cancer. Therefore, searching for new lead compounds that show the highest anticancer potency with the fewest adverse effects is a major drug-discovery challenge. Because the thiazole ring is present in dasatinib, which is currently used in anticancer therapy, it is important to highlight the ring. In this study, cycloalkylidenehydrazinecarbothioamides (cyclopen

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Koshelev, Vladimir N., Olga V. Primerova, Stepan V. Vorobyev, Anna S. Stupnikova, and Ludmila V. Ivanova. "Synthesis and Antioxidant Activity of Novel Thiazole and Thiazolidinone Derivatives with Phenolic Fragments." Applied Sciences 13, no. 24 (2023): 13112. http://dx.doi.org/10.3390/app132413112.

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In this work, a series of thiosemicarbazones with phenol fragments were used as starting compounds for the synthesis of new effective antioxidants containing both a phenol substituent and a heterocyclic fragment: thiazole and thiazolidinone. To determine the most stable conformation of thiosemicarbazone, a potential energy scan was used, along with NOESY NMR spectroscopy data. A number of thiazole derivatives were obtained due the interaction of thiosemicarbazones with several bromoketones: bromoacetophenone, bromodimedone, and bromoacetylcoumarin. The product yields varied from 71 to 94%. Thi

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39

Boraei, Ahmed T. A., Elsayed H. Eltamany, Matti Haukka, Saied M. Soliman, Assem Barakat, and Manar Sopaih. "Synthesis and X-ray Crystal Structure Analysis of Substituted 1,2,4-Triazolo [4’,3’:2,3]pyridazino[4,5-b]indole and Its Precursor." Crystals 13, no. 7 (2023): 1036. http://dx.doi.org/10.3390/cryst13071036.

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The hit compound 1,2,4-triazolo[4’,3’:2,3]pyridazino[4,5-b]indole 3 was synthesized from the reflux of 4-amino-5-indolyl-1,2,4-triazole-3-thione 1 with 4′-bromoacetophenone 2 in methanol catalyzed by concentrated HCl and the desired final molecule was obtained by recrystallization from methanol. The suggested structures of compounds 1 and 3 based on the spectral characterizations were confirmed by X-ray single crystal diffraction analysis. Compound 3 crystallized in the triclinic crystal system and P-1 space group with a = 5.9308(2) Å, b = 10.9695(3) Å, c = 14.7966(4) Å, α = 100.5010(10)°, β =

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Safaei-Ghomi, Javad, Fariba Salimi, Ali Ramazani, Fatemeh Zeinali Nasrabadi, and Yavar Ahmadi. "The reaction of carbon disulfide with bromoacetophenone in the presence of primary amines: synthesis of 3-alkyl-4-phenyl-1,3-thiazole-2(3H)-thione derivatives." Journal of Sulfur Chemistry 33, no. 1 (2011): 87–92. http://dx.doi.org/10.1080/17415993.2011.635794.

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Şahin, Neslihan, İsmail Özdemir, and David Sémeril. "Palladium-Catalyzed Cross-Coupling Reaction via C–H Activation of Furanyl and Thiofuranyl Substrates." Inorganics 12, no. 6 (2024): 175. http://dx.doi.org/10.3390/inorganics12060175.

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The present study explores the potential of four NHC-palladium(II) complexes derived from (Z)- or (E)-styryl-N-alkylbenzimidazolium salts, namely trans-dichloro-[(Z)-1-styryl- 3-benzyl-benzimidazol-2-yliden]pyridine palladium(II) (6), trans-dichloro-[(E)-1-styryl-3-benzyl- benzimidazol-2-yliden]pyridine palladium(II) (7), trans-dichloro-[(Z)-1-styryl-3-(3-fluorobenzyl)- benzimidazol-2-yliden]pyridine palladium(II) (8) and trans-dichloro-[(E)-1-styryl-3- (3-fluorobenzyl)-benzimidazol-2-yliden]pyridine palladium(II) (9), to be use as pre-catalysts for the cross-coupling reactions between furanyl

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Ramalingam, S., P. Anbusrinivasan, and S. Periandy. "FT-IR and FT-Raman spectral investigation, computed IR intensity and Raman activity analysis and frequency estimation analysis on 4-chloro-2-bromoacetophenone using HF and DFT calculations." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 78, no. 2 (2011): 826–34. http://dx.doi.org/10.1016/j.saa.2010.12.041.

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Fryzuk, Michael D., Xiaoliang Gao, and Steven J. Rettig. "Coordination chemistry of a mixed donor bidentate ligand with nickel. A tetrameric enolate of sodium that binds a phosphine donor." Canadian Journal of Chemistry 73, no. 7 (1995): 1175–80. http://dx.doi.org/10.1139/v95-144.

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The preparation of a mixed donor ligand consisting of an enolate and neutral phosphine is described and its coordination chemistry with nickel reported. The phosphino ketones R2PCH2COPh (R = Cy or Pri) are prepared by the reaction of the corresponding secondary phosphines with bromoacetophenone to form the corresponding phosphonium salts [R2P(H)CH2COPh]+Br− (R = Cy or Pri); subsequent deprotonation leads to the neutral ketones. The enolates are formed by addition of NaN(SiMe3)2 to the neutral ketone. The crystal structure of the sodium enolate having isopropyl substituents at phosphorus displa

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Bachinskii, S. Yu, Yu V. Ishkov, V. Ch Kravtsov, and S. A. Andronati. "SUBSTITUTED AMINOCHALCONES AS STARTING COMPOUNDS FOR RECEIVING NEW 1,4-BENZODIAZEPINES DERIVATIVES." Odesa National University Herald. Chemistry 27, no. 2(82) (2022): 83–92. http://dx.doi.org/10.18524/2304-0947.2022.2(82).264891.

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The aim of this work is the synthesis of a number of substituted E‑1-(2-amino‑5-R1-phenyl)-3-(4-R2-phenyl)prop‑2-en‑1-ones (2-aminochalcones) as precursors for obtaining new derivatives of 7-R1–5-[2-R2-phenylvinyl]-1,4-benzodiazepin‑2-ones. Starting 5-substituted 2-aminoacetophenones with bromo and nitro group were synthesized from 2-aminoacetophenone by bromination of the latter with N‑bromosuccinimide in acetonitrile and nitration of 2-acetaminoacetophenone with a nitrating mixture followed by removal of acetyl protection. 2-Aminochalcones were synthesized according to standard methods durin

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Shi, Hongjin, Liang Wang, Shuai-Shuai Li, Yongjun Liu, and Lubin Xu. "Divergent syntheses of spirooxindoles from oxindole-embedded four-membered synthon via cycloaddition reactions." Organic Chemistry Frontiers 7, no. 5 (2020): 747–55. http://dx.doi.org/10.1039/d0qo00038h.

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The construction of five and six membered heterocycle fused spirooxindoles was achieved via the [4 + 1] and formal [4 + 2] cycloadditions between our rationally designed four-membered synthons and pyridinium methylides and α-bromoacetophenones, respectively.

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GAMAL, A. AHMED. "Some Reactions of p-Nitrobenzal-o-methoxy-p-bromoacetophenone." Journal of Indian Chemical Society Vol. 72, Mar 1995 (1995): 181–83. https://doi.org/10.5281/zenodo.5901958.

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Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Egypt <em>Manuscript received 12 March 1993, revised 20 October 1993, accepted 9 December 1993</em> Benzalacetophenone derivative (1) was allowed to react with hydrazines, hydroxylaminehydrochloride, thiourea and bromine to give Δ<sup>2</sup>-pyrazolines (2a,b), Δ<sup>2</sup>-isoxazoline (3), tetrahydropyrimidinethione derivative (4) and the chalcone dibromide' (5) respectively. Comopound 4 was reacted with hydrazinehydrate, acid hydrazides, phenylisocyanate and secondary amines (under Mannich reaction condi

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Herndon, James W., Yanshi Zhang, and Ke Wang. "Palladium-catalyzed aminobenzannulation during Sonogashira couplings using o-bromoacetophenone." Journal of Organometallic Chemistry 634, no. 1 (2001): 1–4. http://dx.doi.org/10.1016/s0022-328x(01)01104-4.

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Barlin, GB, LP Davies, SJ Ireland, and JK Zhang. "Imidazo[1,2-b]pyridazines. XIV. Syntheses and Central Nervous System Activities of Some 6-(Methoxy-, dimethoxy-, methylenedioxy-, chloro- and fluoro-)-3-alkoxy-2-phenyl(and substituted phenyl)imidazo[1,2-b]pyridazines." Australian Journal of Chemistry 46, no. 3 (1993): 353. http://dx.doi.org/10.1071/ch9930353.

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Syntheses are reported for 28 new 3-alkoxy-6-(3′-methoxy-,3′,4′-dimethoxy, 3′,4′-methylene-dioxy-, 2′- and 4′-chloro- and 4′-fluoro-benzylamino)-2-phenyl(and substituted phenyl) imidazo -[1,2-b] pyridazines from the corresponding 6-substituted pyridazin-3-amine 2-oxides with α- bromoacetophenones, followed by alkylation of the intermediate 3-hydroxyimidazo[1,2-b] pyridazines. In tests of the ability of these compounds to displace [3H]diazepam from rat brain membrane, 3-(2′-ethoxyethoxy)-6(3′-methoxybenzylamino)-2-phenyl- and 6(3′,4′-methylenedioxybenzylamino )-2-(3″,4″-methylenedioxyphenyl)-3-

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Sarbu, Laura Gabriela. "SYNTHESIS OF 1,3-DITHIOLIUM SALTS CONTAINING N-METHYLPIPERAZINE." ACTA CHEMICA IASI 31, no. 2 (2024): 119–28. http://dx.doi.org/10.47743/achi-2023-2-0008.

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The synthesis of 4-aryl-2-(N-methylpiperazin-1-yl)-1,3-dithiol-2-ylium perchlorates has been accomplished by the acid catalyzed heterocyclocondensation of the corresponding substituted phenacyl N-methylpiperazin-1-carbodithioates. The later have been obtained from the reaction of various substituted -bromoacetophenones with a salt of N-methylpiperazine carbodithioic acid. The structures of new synthesized N-methylpiperazine derivatives have been proved by analytical and spectral data.

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N., V. PUROHIT, and N. MUKHERJEE S. "Synthesis of some 3-Aroyl-4-alkylbenzopyran-1H-1-ones and Mechanistic Studies on the Synthesis of 3-Aroyl-4-arylbenzopyran-1H-1-ones." Journal of Indian Chemical Society Vol. 75, May 1998 (1998): 310–12. https://doi.org/10.5281/zenodo.5927563.

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Department of Chemistry, Faculty of Science, M. S. University of Baroda, Vadodara-390 002 <em>Manuscript received 27 May 1996, revised 28 April 1997, accepted 13 August 1997</em> Reactions of bromoacetophenones (2) with o-acyl/aroylbenzoic acids (1,4) yielded the products 4-alkyl-3-aroylbenzopyran-1<em>H</em>-1-ones (3) and 3-arylbenzofuran-1<em>H</em>-1-ones (6). The high product sclectivity is observed depending upon the nature of the substrate taken.

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