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Journal articles on the topic '4-aryl-N-(aryl)-3-(prop-2-en-1-yl)-2'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Sreevidya, Thekke, Badiadka Narayana, and Hemmige Yathirajan. "Synthesis and characterization of some chalcones and their cyclohexenone derivatives." Open Chemistry 8, no. 1 (2010): 174–81. http://dx.doi.org/10.2478/s11532-009-0124-x.

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AbstractA series of chalcones and their derivatives have been synthesized. Chalcones, 1-(1,3-benzodioxol-5-yl)-3-(aryl)-prop-2-en-1-ones were prepared by the aldol condensation of 1-(1,3-benzodioxol-5-yl)ethanones and aryl aldehydes. Based-catalyzed condensation of 1-(1,3-benzodioxol-5-yl)-3-(aryl)prop-2-en-1-ones with ethyl acetoacetate yields corresponding ethyl 4-(1,3-benzodioxol-5-yl)-6-(aryl)-2-oxocyclohex-3-ene-1-carboxylates. Some of the synthesized chalcones were reported in the literature; the newly synthesized compounds were characterized by single crystal X-ray studies, IR, 1H-NMR a

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2

Drapak, Iryna, Borys Zimenkovsky, Lina Perekhoda, et al. "Search for angiotensin II receptor antagonists among 4-aryl-n-(aryl)-3-(prop-2-en-1-yl)-2,3-dihydro-1,3-thiazol-2-imine derivatives." Pharmacia 66, no. (4) (2019): 181–86. https://doi.org/10.3897/pharmacia.66.e36808.

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The aim of study was to find potential antihypertensive and cardiotropic drugs among new 4-aryl-N-(aryl)-3-(prop-2-en-1-yl)-2,3-dihydro-1,3-thiazol-2-imines. Materials and methods: The target compounds were synthesized by condensation asymmetrical substituted thioureas with α-bromo-4-R<sub>1</sub>-acetophenones in ethanol medium. The structure and purity of the compounds synthesized were confirmed by <sup>1</sup>H, <sup>13</sup>C NMR-spectroscopy and elemental analysis. Docking studies of synthesized compounds to the active site of angiotensin receptor ІІ (PDB ID: 3R8A) were performed in order

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3

Drapak, Iryna, Borys Zimenkovsky, Lina Perekhoda, et al. "Search for angiotensin II receptor antagonists among 4-aryl-n-(aryl)-3-(prop-2-en-1-yl)-2,3-dihydro-1,3-thiazol-2-imine derivatives." Pharmacia 66, no. 4 (2019): 181–86. http://dx.doi.org/10.3897/pharmacia.66.e36808.

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The aim of study was to find potential antihypertensive and cardiotropic drugs among new 4-aryl-N-(aryl)-3-(prop-2-en-1-yl)-2,3-dihydro-1,3-thiazol-2-imines. Materials and methods: The target compounds were synthesized by condensation asymmetrical substituted thioureas with α-bromo-4-R1-acetophenones in ethanol medium. The structure and purity of the compounds synthesized were confirmed by 1H, 13C NMR-spectroscopy and elemental analysis. Docking studies of synthesized compounds to the active site of angiotensin receptor ІІ (PDB ID: 3R8A) were performed in order to find its potential inhibitors

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4

Ashok, Dongamanti, Rangu Kavitha, Srinivas Gundu, and Rao Hanumantha. "Microwave-assisted synthesis of new pyrazole derivatives bearing 1,2,3-triazole scaffold as potential antimicrobial agents." Journal of the Serbian Chemical Society 82, no. 4 (2017): 357–66. http://dx.doi.org/10.2298/jsc160205016a.

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A new series of (E)-3-(3-(4-substituted phenyl)-1-phenyl-1H-pyrazol- 4-yl)-1-(2-hydroxy-4-((1-aryl-1H-1-2,3-triazol-4-yl)methoxy)phenyl)- prop-2-en-1-one derivatives was synthesized. The synthesis of the title compounds involved the 1,3-dipolar Cu(I)-catalyzed alkyne?azide cycloaddition (CuAAC) reaction of (E)-3-(3-(4-substituted phenyl)-1-phenyl-1H-pyrazol-4- -yl)-1-(2-hydroxy-4-(prop-2-yn-1-yloxy)phenyl)prop-2-en-1-ones with aromatic azides. The structures were confirmed by NMR, FT-IR, mass and elemental analysis. All the synthesized compounds (6a?j) were evaluated for their antimicrobial ac

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5

Nageswara Rao, Ambala, Dara Hariprasad, and Chinthala Venkanna. "EFFICIENT SYNTHESIS AND ANTIMICROBIAL ACTIVITY OF 3-(3-ARYL-4,5-DIHYDRO-1H-PYRAZOL-5-YL)-2- (TRIFLUOROMETHYL)-1,8-NAPHTHYRIDINES." RASAYAN Journal of Chemistry 16, no. 01 (2023): 233–39. http://dx.doi.org/10.31788/rjc.2023.1618056.

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An efficient synthesis of 3-(3-Aryl-4,5-dihydro-1H-pyrazol-5-yl)-2-(trifluoromethyl)-1,8-naphthyridines 5(a-h) was achieved by the cyclo condensation of 1-Aryl-3-(2-(trifluoromethyl)-1,8-naphthyridin-3-yl)prop-2-en-1-ones(4a-h) with hydrazine hydrate. The compounds 4(a-h) were synthesized through a three-step procedure starting from ethyl 2-(trifluoromethyl)-1,8-naphthyridine-3-carboxylate (1). Antibacterial and antifungal activities of the final compounds 5(a-h) have been screened and compound 5h exhibited significant inhibition of bacterial and fungal growth. The structures of compounds 3-5

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6

Linh, Bùi Thị Thùy, Nguyễn Tiến Công, and Huỳnh Thị Xuân Trang. "SYNTHESIS AND STRUCTURE OF SOME CHALCONES CONTAINING ACETAMIDE GROUP." Tạp chí Khoa học 17, no. 9 (2020): 1536. http://dx.doi.org/10.54607/hcmue.js.17.9.2789(2020).

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Hai chalcone là (E)-3-(2-hydroxyphenyl)-1-phenylprop-2-en-1-one (3a) và (E)-3-(4-hydroxyphenyl)-1-phenylprop-2-en-1-one (3b) đã được tổng hợp tương ứng từ phản ứng của acetophenone với 2-hydroxybenzaldehyde hoặc 4-hydroxybenzaldehyde. Phản ứng Williamson giữa (3a) hoặc (3b) với các N-aryl-2-chloroacetamide khác nhau đã tạo thành 8 hợp chất (E)-N-(4-aryl)-2-(2/4-(3-oxo-3-phenylprop-1-en-1-yl)phenoxy)acetamide; 7 trong số đó là chất mới: (E)-N-(4-bromophenyl)-2-(2-(3-oxo-3-phenylprop-1-en-1-yl)phenoxy)acetamide (5a), (E)-N-(4-chlorophenyl)-2-(2-(3-oxo-3-phenylprop-1-en-1-yl)phenoxy)acetamide (5b

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7

Naik, Vasant S., Hemmige S. Yathirajan, Jerry P. Jasinski, Victoria A. Smolenski, and Christopher Glidewell. "The crystal structures of six (2E)-3-aryl-1-(5-halogenothiophen-2-yl)prop-2-en-1-ones." Acta Crystallographica Section E Crystallographic Communications 71, no. 9 (2015): 1093–99. http://dx.doi.org/10.1107/s2056989015015534.

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The structures of six chalcones containing 5-halogenothiophen-2-yl substituents are reported: (2E)-1-(5-chlorothiophen-2-yl)-3-(4-ethylphenyl)prop-2-en-1-one, C15H13ClOS, (I), and (2E)-1-(5-bromothiophen-2-yl)-3-(4-ethylphenyl)prop-2-en-1-one, C15H13BrOS, (II), are isostructural in space groupP-1, while (2E)-1-(5-chlorothiophen-2-yl)-3-(4-ethoxyphenyl)prop-2-en-1-one, C15H13ClO2S, (III), and (2E)-1-(5-bromothiophen-2-yl)-3-(4-ethoxyphenyl)prop-2-en-1-one C15H13BrO2S, (IV), are isostructural in space groupP21/c. There are no hydrogen bonds of any kind in the structures of compounds (I) and (II)

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8

Hussein, Essam M., Ziad Moussa, Nizar El Guesmi, and Saleh A. Ahmed. "Facile access to regio- and stereoselective synthesis of highly functionalized spiro[indoline-3,2′-pyrrolidines] incorporating a pyrene moiety: experimental, photophysical and theoretical approach." RSC Advances 8, no. 43 (2018): 24116–27. http://dx.doi.org/10.1039/c8ra04312d.

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The regio- and stereochemical polar [3 + 2] cycloaddition of azomethine ylides with (E)-3-aryl-1-(pyren-1-yl)prop-2-en-1-ones as dipolarophiles, was studied using experimental and theoretical methods.

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9

Chinh, Pham The, Pham Thi Tham, Duong Huong Quynh, et al. "Synthesis and Cytotoxic Activity of Several Novel N-Alkyl-Plinabulin Derivatives With Aryl Group Moieties." Natural Product Communications 16, no. 4 (2021): 1934578X2110100. http://dx.doi.org/10.1177/1934578x211010040.

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Seven novel N-alkyl-plinabulin derivatives with aryl groups moieties (nitroquinoline, 1,4-dihydroquinoline, 4-methoxybenzene, and 4-chlorobenzene) have been synthesized via aldol condensation and alkylation in one-pot, and tested for their cytotoxicity against 4 cancer cell lines (KB, HepG2, Lu, and MCF7). Compounds ( Z)−3-((6,8-dimethyl-4-oxo-1,4-dihydroquinolin-2-yl)methylene)−6-(( Z)−4-methoxybenzylidene)−1-(prop-2-yn-1-yl)piperazine-2,5-dione (5a), ( Z)−6-(( Z)−4-methoxybenzylidene)−1-(prop-2-yn-1-yl)−3-((1,6,8-trimethyl-4-oxo-1,4-dihydroquinolin-2-yl)methylene)piperazine-2,5-dione (5b), a

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10

Wanare, Rajendra Krushnaji. "A Novel and Facile Synthesis of Thiopyrimidines and O-Glucosides." Asian Journal of Organic & Medicinal Chemistry 4, no. 2 (2019): 65–69. http://dx.doi.org/10.14233/ajomc.2019.ajomc-p161.

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Reaction of 3-methyl-5-(3'-aryl prop-2'-enoyl)-1,2-benzisoxazole (1a-j) with thiourea and alcoholic solution of KOH afforded 3-methyl-5-(4'-aryl-2'-thiopyrimidin-6'-yl)-1,2-benzisoxazoles (2a-j). Oxidation of products 2a-j using alkaline KMnO4 solution produces 5-(4'-aryl-2'-thiopyrimidin-6'-yl)-1,2-benzisoxazole-3-carboxylic acids (3a-j). Condensation of products 3a-j with 2,3,4,6-tetra-Oacetyl-α-D-glucopyranosyl bromide (TAGBr), the glucosylating agent synthesized 3-(2,3,4,6-tetra-O-acetyl-3-acetyl-β-D-glucopyranosyl)-5-(4'-aryl-2'-thiopyrimidin-6'-yl)-1,2-benzisoxazoles (4a-j). Subsequent d

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11

Wanare, Rajendra K., Yogesh V. Punatkar, and Ravin M. Jugade. "Synthesis, Glucosylation and Polarographic Studies of Benzofused Pyrimidine Derivatives." Asian Journal of Organic & Medicinal Chemistry 6, no. 3 (2021): 148–53. http://dx.doi.org/10.14233/ajomc.2021.ajomc-p328.

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7-Amino-3-methyl-5-(3′-aryl prop-2′-enoyl)-1,2-benzisoxazoles (2a-j) were synthesized by the condensation of 5-acetyl-7-amino-3-methyl-1,2-benzisoxazole (1) with aldehydes. The reaction of products 2a-j with urea produced 7-amino-3-methyl-5-(4′-aryl-2′-pyrimidin-6′-yl)-1,2-benzisoxazole derivatives (3a-j). Glucosylation of 3a-j with 2,3,4,6-tetra-O-acetyl glucuropyranosyl bromide (TAGBr) and tetrabutylammonium bromide (TBAB) gives corresponding glucosylated 7-amino-(β-D-2,3,4,6- tetra-O-acetyl glucopyranosyl)-3-methyl-5-(4′-aryl-2′-pyrimidin-6′-yl)-1,2-benzisoxazoles (4a-j). Glucosylated compo

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12

Koval'chuk, T. A., N. M. Kuz'menok, and A. M. Zvonok. "Reaction of 3-Aryl-1-(2-methyloxiran-2-yl)prop-2-en-1-ones with Tosylhydrazine." Chemistry of Heterocyclic Compounds 41, no. 10 (2005): 1237–44. http://dx.doi.org/10.1007/s10593-005-0309-y.

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13

Ashok, D., Arram Ganesh, B. Vijaya Lakshmi, and S. Ravi. "Ultrasound- and microwave-assisted synthesis of (E)-1-aryl-3-[2-(piperidin-1-yl)quinolin-3-yl]prop-2-en-1-ones and (E)-1-aryl-3-[2-(pyrrolidin-1-yl)quinolin-3-yl]prop-2-en-1-ones, and their antimicrobial activity." Russian Journal of General Chemistry 84, no. 6 (2014): 1237–42. http://dx.doi.org/10.1134/s1070363214060309.

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14

Subrahmanyam, Relangi Siva, and Venkateswara Rao Anna. "Green Synthetic Protocol for (E)-1-Aryl-3-(2-morpholinoquinolin- 3-yl)prop-2-en-1-ones and Their Antimicrobial Activity." Asian Journal of Chemistry 31, no. 9 (2019): 1895–98. http://dx.doi.org/10.14233/ajchem.2019.21968.

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We report here an easy, efficient and green synthetic protocol for the (E)-1-aryl-3-(2-morpholinoquinolin-3-yl)prop-2-en-1-ones by the Claisen-Schmidt condensation of 2-morpholinoquinoline-3-carbaldehyde and different substituted acetophenones by using 1-butyl-3-methylimidazolium tetrafluoroborate (Bmim)BF4. The compounds were characterized by using 1H NMR, 13C NMR and mass spectral data and screened there in vitro antimicrobial activity against different bacterial and fungal organisms.

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15

Fegade, Bharti, and Shailaja Jadhav. "Design, Synthesis and Molecular Docking Study of N-Heterocyclic Chalcone Derivatives as an Anti-cancer Agents." International Journal of Pharmaceutical Sciences and Drug Research 14, no. 01 (2022): 78–84. http://dx.doi.org/10.25004/ijpsdr.2022.140111.

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The Claisen-Schmidt condensation of 4-(aryl)-aminobenzaldehyde and 2-hydroxyacetophenone resulted in a new series of heterocyclic chalcone (4a-4g) derivatives. Nucleophilic aromatic substitution (SNAr) of 4-fluorobenzaldehyde with heterocycle amines by ultrasonication in the presence of a base and polar aprotic solvent yielde 4-(aryl)-aminobenzaldehydes. Spectral investigations were used to establish the structures of synthesized compounds. The in vitro anti-cancer activity of the synthesized derivative was evaluated against MCF-7 (breast cancer) cells by SRB assay. Compounds 4c, 4b, and 4c ha

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16

Siutkina, Alena I., Ramiz R. Makhmudov, and Daria A. Shipilovskikh. "Synthesis and analgesic activity evaluation of derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[<i>b</i>]thiophene-3-carboxylic acid." Chimica Techno Acta 8, no. 4 (2021): 20218404. http://dx.doi.org/10.15826/chimtech.2021.8.4.04.

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The synthesis of new derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acid is described. Starting 2-{[5-aryl-2-oxofuran-3(2H)-ylidene]amino}thiophene-3-carboxylic acids were obtained by intramolecular cyclisation of substituted 4-aryl-4-oxo-2-thienylaminobut-2-enoic acids in acetic anhydride. New derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acids were obtained via decyclization reaction of 2-{[5-aryl-2-oxofuran-3(2H)-ylidene]amino}thiophene-3-carboxylic acids.

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17

Sarvaiya, Nikulsinh, Hitesh Samata, Sheetal Gulati, and H. Patel. "SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITY OF PYRAZOLE-PYRIMIDONE CLUBBED DERIVATIVES." Rasayan Journal of Chemistry 15, no. 01 (2022): 564–68. http://dx.doi.org/10.31788/rjc.2022.1516656.

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4-(2-(1-(4-aryl-3-(furan-2-yl(hydroxy)methyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carbonyl)-3-methyl5-oxo-1H-pyrazol-4(5H)-ylidene)hydrazinyl)-N-(thiazol-2-yl) benzene sulphonamides (2a-e) were synthesised by condensation of 4-(2-(1-(4-aryl-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carbonyl)-3-methyl-5-oxo-1Hpyrazol-4(5H)-ylidene) hydrazinyl)-N-(thiazol-2-yl) benzene sulphonamide (1a-e) with furfuraldehyde. The structures of all the compounds (2a-e) were characterized duly. The compounds were also monitored for antimicrobial activity.

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18

J Khairnar, Bhikan, Rahul S. Salunke, Premchand B. Patil, et al. "Synthesis and Antimicrobial Activity of Some New 1, 4-Benzothiazine Containing Thiosemicarbazides and 1, 3, 4-Oxadiazole Derivatives." E-Journal of Chemistry 9, no. 1 (2012): 318–22. http://dx.doi.org/10.1155/2012/902784.

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A series of novel 3- methyl-7-substituted-4H,4-benzothiazine-2-carbohydrazide (3a-e) and corresponding thiosemicarbazides (4-a-q); 2-[3-methyl-7-substituted- 4H-1, 4-benzothiazine-2-yl]-N-(aryl) hydrazine carbothiamide have been synthesized. The thiosemicarbazide when cyclized with iodine via intramolecular cyclisation gave benzothiazonyl oxadiazoles (5-a-q); 5-(3-methyl -7-substitued-4H- 1,4-benzothiazin-2-yl)-N—aryl- 1,3,4- oxadiazol -2-amine and the compounds were tested for antibacterial and antifungal activities against different microorganisms.

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19

Wanare, Rajendra K. "Design, Synthesis and Evaluation of Novel Thiopyrimidine-Glucuronide Compounds with Promising Biological Activities." Asian Journal of Organic & Medicinal Chemistry 7, no. 3 (2022): 239–44. http://dx.doi.org/10.14233/ajomc.2022.

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3-Methyl-5-acetyl-7-[(2-sulfanylidene-6-aryl-1,2-dihydropyrimidin-4-yl)amino]-1,2-benzisoxazoles (2a-n) were obtained from N-(5-acetyl-3-methyl-1,2-benzoxazol-7-yl)-3-arylprop-2-enamides (1a-n) and thiourea. Products (2a-n) oxidized with KMnO4 to afford 5-acetyl-7-[(2-sulfanylidene-6-aryl-1,2- dihydropyrimidin-4-yl)amino]-1,2-benzisoxazole-3-carboxylic acids (3a-n). Reaction of 3a-n with D-gluconic acid and pyridine yielded β-D-glucuronosyl-5-acetyl-7-[(2-sulfanylidene-6-aryl-1,2- dihydropyrimidin-4-yl)amino]-1,2-benzisoxazol-3-carboxylates (4a-n). The present synthesis featured the formation

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20

Altıntop, Mehlika Dilek. "Synthesis, In vitro and In silico Evaluation of a Series of Pyrazolines as New Anticholinesterase Agents." Letters in Drug Design & Discovery 17, no. 5 (2020): 574–84. http://dx.doi.org/10.2174/1570180816666190618111023.

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Background: Pyrazolines, electron-rich nitrogen carriers, are of great importance due to their potential applications for the treatment of many diseases including inflammation, infectious diseases and neurodegenerative disorders. Objectives: The purpose of this work was to synthesize new pyrazoline derivatives and evaluate their anticholinesterase effects. Methods: 1-Aryl-5-[4-(piperidin-1-yl)phenyl]-3-(3,4-dimethoxyphenyl)-4,5-dihydro-1H-pyrazoles (1-7) were synthesized via the treatment of 1-(3,4-dimethoxyphenyl)-3-[4-(piperidin-1-yl)phenyl]prop-2- en-1-one with arylhydrazine hydrochloride d

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21

Ho, Yuh Wen, and Wei Hua Yao. "Thioxopyrimidine in Heterocyclic Synthesis III: Synthesis and Properties of Some Novel Heterocyclic Chalcone Derivatives Containing a Thieno[2,3-d]pyrimidine-Based Chromophore." Journal of Chemistry 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/649576.

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Cyclization of 4-methyl-2-phenyl-6-thioxo-1,6-dihydropyrimidine-5-carbonitrile1with chloroacetone in DMF in the presence of excess potassium carbonate anhydrous gave the 1-(5-amino-4-methyl-2-phenylthieno[2,3-d]pyrimidin-6-yl)ethanone3, which can react with 2,5-dimethoxytetrahydrofuran in glacial acetic acid producing the 1-[4-methyl-2-phenyl-5-(1H-pyrrol-1-yl)thieno[2,3-d]pyrimidin-6-yl]ethanone4. On the other hand, a series of novel 3-aryl-1-[4-methyl-2-phenyl-5-(1H-pyrrol-1-yl)-thieno[2,3-d]pyrimidin-6-yl]prop-2-en-1-one chalcone dyes6a—nwere obtained by the condensation reaction of 1-[4-me

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22

Pradip, P. Deohate. "Substituted [1,2,4,5]-dithiadiazines and [1,3,4]-thiadiazolidines; synthesis, characterization and antimicrobial study." Journal of Indian Chemical Society Vol. 89, Dec 2012 (2012): 1705–10. https://doi.org/10.5281/zenodo.5772233.

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Department of Chemistry, Shri Radhakisan Laxminarayan Toshniwal College of Science, Akola-444 00I, Maharashtra, India <em>E-mail</em> : pradip22209l@yahoo.co.in <em>Manuscript received 12 August 2009, revised 29 February 2012, accepted 14 March 2012</em> Series of compounds 2-benzotriazol-1-yl-1-(3-phenylimino-6-aryl/alkylimino-[1,2,4,5]-dithiadiazinan-4-yl)-ethanones and 2-benzotriazol-1-yl-l-(2-phenylimino-5-aryl/alkylimino-[1,3,4]·thiadiazolidin-3-yl)-ethanones have been synthesited by the interaction of 2-benzotriazol-1-yi-<em>N</em>-aryl/alkyl thiocarbamido-acetamides with <em>N</e

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23

Kansagara, N. N., V. R. Dangar, and V. R. Shah. "Synthesis, Characterization and Antimicrobial Evaluation of Schiff’s Base and Aryl Aminomethyl Derivatives." International Letters of Chemistry, Physics and Astronomy 64 (February 2016): 89–94. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.64.89.

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Schiff’s bases are obtained on heating an aldehydes with aromatic amine in presence of glacial acetic acid. These are the compounds containing characteristic –HC=N– group. Aryl amino methyl derivatives of heterocyclic compounds to synthesize by selective reduction of schiff’s bases (imine group) with sodiumborohydride in controlled experimental condition. Schiff’s base of N-Aryl-1-[6-methyl-2-(4-methylphenyl)imidazo[1,2-a]pyridin-3-yl]methanimines & Aryl amines of N-Aryl-1-[6-methyl-2-(4-methylphenyl)imidazo[1,2-a]pyridin-3-yl]methanamines were prepared. Their chemical structures were conf

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24

Kansagara, N. N., V. R. Dangar, and V. R. Shah. "Synthesis, Characterization and Antimicrobial Evaluation of Schiff’s Base and Aryl Aminomethyl Derivatives." International Letters of Chemistry, Physics and Astronomy 64 (February 15, 2016): 89–94. http://dx.doi.org/10.56431/p-5z8xff.

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Schiff’s bases are obtained on heating an aldehydes with aromatic amine in presence of glacial acetic acid. These are the compounds containing characteristic –HC=N– group. Aryl amino methyl derivatives of heterocyclic compounds to synthesize by selective reduction of schiff’s bases (imine group) with sodiumborohydride in controlled experimental condition. Schiff’s base of N-Aryl-1-[6-methyl-2-(4-methylphenyl)imidazo[1,2-a]pyridin-3-yl]methanimines & Aryl amines of N-Aryl-1-[6-methyl-2-(4-methylphenyl)imidazo[1,2-a]pyridin-3-yl]methanamines were prepared. Their chemical structures were conf

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25

Bussey, Katherine A., Annie R. Cavalier, Jennifer R. Connell, et al. "Structural studies of (prop-2-en-1-yl)bis[(pyridin-2-yl)methylidene]amine hetero-scorpionate copper complexes." Acta Crystallographica Section C Structural Chemistry 71, no. 7 (2015): 526–33. http://dx.doi.org/10.1107/s2053229615010335.

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The structures of five compounds consisting of (prop-2-en-1-yl)bis[(pyridin-2-yl)methylidene]amine complexed with copper in both the CuIand CuIIoxidation states are presented, namely chlorido{(prop-2-en-1-yl)bis[(pyridin-2-yl)methylidene]amine-κ3N,N′,N′′}copper(I) 0.18-hydrate, [CuCl(C15H17N3)]·0.18H2O, (1),catena-poly[[copper(I)-μ2-(prop-2-en-1-yl)bis[(pyridin-2-yl)methylidene]amine-κ5N,N′,N′′:C2,C3] perchlorate acetonitrile monosolvate], {[Cu(C15H17N3)]ClO4·CH3CN}n, (2), dichlorido{(prop-2-en-1-yl)bis[(pyridin-2-yl)methylidene]amine-κ3N,N′,N′′}copper(II) dichloromethane monosolvate, [CuCl2(C

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M., J. Ladani, D. Tala S., D. Akbari J., F. Dhaduk M. та S. Joshi H. "Synthesis and biological study of oxopyrimidines and thiopyrimidines of 2-(2,4-dichlorophenyl)imidazo[1,2-α ]pyridin-3-carbaldehyde". Journal of Indian Chemical Society Vol. 86, Jan 2009 (2009): 104–8. https://doi.org/10.5281/zenodo.5807328.

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Department of Chemistry, Saurashtra University, Rajkot-360 005, Gujarat, India <em>E-mail</em> : drhsjoshi49@gmail.com <em>Manuscript received 14 November 2007, revised 6 August 2008, accepted 17 September 2008</em> 2-(2,4-Dichlorophenyl)imidazo[1,2-α]pyridlne-3·carbaldehyde (1) was prepared from 2-aminopyridine through multi-step reaction. Compound 1 reacts with different aryl ketones in the presence of catalytic amount of 40% KOH to give (2<em>E</em>)-3-[2-(2,4-dichlorophenyl)imidazo[1,2-α]pyridin-3-yl]-1-arylprop-2-en-1-ones (2a-j), which on cyclization with urea and

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Maas, Gerhard, Michael Keim, Medina Jasarevic, and Ines Miller. "1,3-Bis(trifluoromethyl)prop-2-ene 1-Iminium Salts: Reactions with Alkoxybenzenes and Anilines." Synthesis 54, no. 06 (2021): 1587–600. http://dx.doi.org/10.1055/a-1681-4823.

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Abstract1,3-Bis(trifluoromethyl)prop-2-ene 1-iminium triflate salts were prepared for the first time and some synthetic applications as 1,3-biselectrophilic building blocks were established. They were found to react with dimethoxybenzenes or methylene-1,2-dioxybenzenes to furnish vinylogous trifluoroacetylation products (4-aryl-1,1,1,5,5,5-hexafluoropent-3-en-2-ones) and 1-dialkylamino-1,3-bis(trifluoromethyl)-1H-indenes. With aniline and ring-substituted anilines, 2,4-bis(trifluoromethyl)quinolines were formed. An unusual 4H-pyran, formally a condensation product of the N,N-dimethyl-1,3-bis(t

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Kostritskiy, Alexander Yu, Marina G. Nakonechnikova, Olga V. Fedotova, and Nina V. Pchelintseva. "Synthesis and Heterocyclization of 4-Hydroxy-3 - ((2-hydroxy-4,4-dimethyl-6-oxocyclohex1-en-1-yl) (aryl) methyl) -2H-chromen-2-ones." Izvestiya of Saratov University. New Series. Series: Chemistry. Biology. Ecology 20, no. 4 (2020): 362–71. http://dx.doi.org/10.18500/1816-9775-2020-20-4-362-371.

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The possibility of obtaining asymmetric 1,5-diketones based on 4-hydroxy-2H-chromen-2-one and dimedone by three-component condensation in the presence of L-proline as a catalyst is shown. As a result, a series of 4-hydroxy3 - ((2-hydroxy-4,4-dimethyl-6-oxocyclohex1-en-1-yl) (aryl) methyl) -2H-chromen-2-ones was obtained with a yield of 25 up to 73%. The study revealed that the highest yield was observed for compounds containing fragments of ortho-substituted aldehydes capable of forming a hydrogen bond. For meta- and para-substituted – the lowest yield was observed. In the case of ortho-substi

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Pradip, P. Deohate. "Substituted [1,3,4]-oxadiazole, [1,3,4]-thiadiazole and [1,2,4]-triazole; synthesis, characterization and antimicrobial study." Journal of Indian Chemical Society Vol. 89, Feb 2012 (2012): 253–59. https://doi.org/10.5281/zenodo.5759585.

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Department of Chemistry, Shri Radhakisan Laxminarayan Toshniwal College of Science, Akola-444 001, Maharashtra, India <em>E-mail</em> : pradip222091@yahoo.co.in <em>Manuscript received 06 August 2009, revised 29 December 2010, accepted 20 June 2011</em> Series of compounds 5-(benzotriazol-1-yl-methyl)-2-aryl/alkyl-amino-[1 ,3,4]-oxadiazoles, 5-(benzotriazol-1-yl-methyl)-2-ary 1/ alky 1-amino-[1 ,3, 4]-thiadiazoles and 5-(benzotriazol-1-yl-methyl)-3-merca pto-4-aryl/ alkyl-4<em>H</em>-[1 ,2 ,4]-triazoles have been synthesized by the oxidative cyclization of 2-benzotriazol-1-yl-<em>N</em>-aryl/a

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30

Al-Badrani, Hayfa, Nameer S. Ezzat, and Yassir S. Al-Jawaheri. "SYNTHESIS OF OXAZEPINO COMPOUND VIA ELECTROPHILIC CYCLIZATION AND EVALUATION OF THEIR BIOLOGICAL ACTIVITY." Chemical Problems 23, no. 3 (2025): 343–55. https://doi.org/10.32737/2221-8688-2025-3-343-355.

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In this research paper, we successfully synthesized some of E-1-(iodomethy-lene)-8-(aryl)-1,2,7,8tetrahydro-9H benzo[6,7][1,4]oxazepino [4,5-a] quinazolin-9-one (compounds 3a-f) through electrophilic cyclization of 3-aryl-2-(2-(prop-2-yn-1-yloxy) phenyl)-2,3-dihydroquinazolin-4(1H)-one derivatives (compounds 2a-f) using iodine as an electrophilic source and potassium carbonate as a base in dichloromethane at room temperature in good yield. We optimized the best condition for this reaction with different electrophiles, bases, and solvents. (2a-f) were prepared from reaction of isatoic anhydride

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Gupta, Apoorva, and Anand K. Halve. "Synthesis & Antifungal Screening of Novel Azetidin-2-ones." Open Chemistry Journal 2, no. 1 (2015): 1–6. http://dx.doi.org/10.2174/1874842201502010001.

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A new series of 4-[3-chloro-2-(4-hydroxy-3-methoxybenzyllidene)-4-oxoazetidin-1-yl]amino-N-(substituted)benzenesulfonamide, 4-{3-chloro-2-[5-methoxy-2-nitro-4-(prop-2-en-1-yloxy)benz yllidene]-4-oxoazetidin-1-yl}]amino}-N-(substituted)benzenesulfonamide and 4-{3-chloro-2-[4-hydroxy-3-methoxy-5-(prop-2-en-1-yl)benzylidene]-4-oxoazetidin-1-yl}amino}-N-(substituted) benzenesulfonamide were synthesized using appropriate synthetic route. The chemical structures of all the synthesized compounds were deduced on the basis of elemental analysis and spectroscopic data. The antifungal activity of the syn

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HAMDI, Naceur. "Synthesis, characterization, antibacterial, antioxidant and anti-inflammatory activities of new 4-Aryl-2-amino-6-(4-hydroxy coumarin-3-yl) pyridine-3-carbonitriles derivatives." JOURNAL OF ADVANCES IN CHEMISTRY 11, no. 1 (2016): 3355–63. http://dx.doi.org/10.24297/jac.v11i1.2224.

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This study aimed for the synthesis of 4-Aryl-2-amino-6-(4-hydroxy coumarin-3-yl) pyridine-3-carbonitriles 4 suitable for use as antibacterial, anti-oxidant and anti-inflammatory activities via a versatile, readily accessible 3-((2E)-3(aryl)prop-2-enoyl)-2H-chromen-2-one 3 which were prepared by refluxing 3-acetyl-4-hydroxy coumarin with aromatic aldehydes in chloroform in the presence of a catalytic amount of piperidine. Then the direct reaction of the obtained chalcones 3 with malonitrile in the presence of ammonium acetate in one step gave products 5 .The structures of the new compounds 3-4

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Rádl, Stanislav, and Iva Obadalová. "Utilization of Aromatic Denitrocyclization Reaction for the Synthesis of 3-Unsubstituted 1,4-Dihydroquinolin-4-one Derivatives." Collection of Czechoslovak Chemical Communications 69, no. 4 (2004): 822–32. http://dx.doi.org/10.1135/cccc20040822.

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Synthesis of 3-unsubstituted 1-alkyl- and 1-aryl-1,4-dihydroquinolin-4-ones from 2-nitroacetophenone via the corresponding 3-amino-1-(2-nitrophenyl)prop-2-en-1-ones and -but-2-en-1-ones by denitrocyclization reaction is described. The nucleophilic cyclization was achieved either by sodium hydride or potassium carbonate in DMF.

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34

Shaibah, Mohammed A. E., Hemmige S. Yathirajan, Asma, et al. "Conversion of diarylchalcones into 4,5-dihydropyrazole-1-carbothioamides: molecular and supramolecular structures of two precursors and three products." Acta Crystallographica Section E Crystallographic Communications 76, no. 3 (2020): 360–65. http://dx.doi.org/10.1107/s2056989020001735.

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Chalcones of type 4-XC6H4C(O)CH=CHC6H4(OCH2CCH)-4, where X = Cl, Br or MeO, have been converted to the corresponding 4,5-dihydropyrazole-1-carbothioamides using a cyclocondensation reaction with thiosemicarbazide. The chalcones 1-(4-chlorophenyl)-3-[4-(prop-2-ynyloxy)phenyl]prop-2-en-1-one, C18H13ClO2, (I), and 1-(4-bromophenyl)-3-[4-(prop-2-ynyloxy)phenyl]prop-2-en-1-one, C18H13BrO2, (II), are isomorphous, and their molecules are linked into sheets by two independent C—H...π(arene) interactions, both involving the same aryl ring with one C—H donor approaching each face. In each of the product

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35

Azzam, Rasha A., Heba A. Elboshi, and Galal H. Elgemeie. "Synthesis, Physicochemical Properties and Molecular Docking of New Benzothiazole Derivatives as Antimicrobial Agents Targeting DHPS Enzyme." Antibiotics 11, no. 12 (2022): 1799. http://dx.doi.org/10.3390/antibiotics11121799.

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The drug-resistance problem is widely spread and becoming more common in community-acquired and nosocomial strains of bacteria. Therefore, finding new antimicrobial agents remains an important drug target. From this perspective, new derivatives of benzothiazole were synthesized and evaluated for their antimicrobial activity and ability to inhibit the DHPS enzyme. The synthesis was carried out by the reaction of benzothiazole N-arylsulphonylhydrazone with N-aryl-2-cyano-3-(dimethylamino)acrylamide, N-aryl-3-(dimethylamino)prop-2-en-1-one, arylaldehydes or diazonium salt of arylamine derivatives

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36

zlem G rsoy Kol, zlem G. rsoy Kol, Haydar Y. ksek Haydar Y ksek, G. l. zdemir G l zdemir, Sevda Manap Sevda Manap, and Sezen Buluttekin Selcan G. k. e. and Muzaffer Alkan Sezen Buluttekin Selcan G k e and Muzaffer Alkan. "Synthesis, In Vitro Antioxidant and Antimicrobial Activities of Some New 2-(3-Alkyl/Aryl-4,5-dihydro-1H-1,2,4-triazol-5-on-4-yl-azomethine)phenyl Benzenesulfonate Derivatives." Journal of the chemical society of pakistan 42, no. 4 (2020): 624. http://dx.doi.org/10.52568/000672/jcsp/42.04.2020.

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Eight new 2-(3-alkyl/aryl-4,5-dihydro-1H-1,2,4-triazol-5-on-4-yl-azomethine)phenyl benzenesulfonates (3) were obtained by the reactions of 3-alkyl(aryl)-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones (1) with 2-benzenesulfonyloxybenzaldehyde (2). Moreover, eight N-acetyl derivatives (4) of compounds 3 were obtained. Then, seven new 2-[1-(morpholine-4-yl-methyl)-3-alkyl/aryl-4,5-dihydro-1H-1,2,4-triazol-5-on-4-yl-azomethine)phenyl benzenesulfonates (5) were obtained by the reactions of compounds 3 with formaldehyde and morpholine. The structures of twenty-three newly synthesized compounds were est

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37

Jha, Amitabh, Ting-Yi Chou, Zainab ALJaroudi, Bobby D. Ellis, and T. Stanley Cameron. "Aza-Diels–Alder reaction between N-aryl-1-oxo-1H-isoindolium ions and tert-enamides: Steric effects on reaction outcome." Beilstein Journal of Organic Chemistry 10 (April 14, 2014): 848–57. http://dx.doi.org/10.3762/bjoc.10.81.

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The synthesis of 5-substituted 6,6a-dihydroisoindolo[2,1-a]quinolin-11(5H)-ones via [4 + 2] imino-Diels–Alder cyclization from N-aryl-3-hydroxyisoindolinones and N-vinyl lactams under Lewis acid-catalysed anhydrous conditions is reported. Reactions of N-(2-substituted-aryl)-3-hydroxyisoindolinones with N-vinylpyrrolidone under identical conditions resulted in the formation of 2-(2-substitued-aryl)-3-(2-(2-oxopyrrolidin-1-yl)vinyl)isoindolin-1-one analogues indicating steric hinderance as the cause of deviation. The probable mechanism of the reaction based on the results from X-ray crystallogra

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38

Badria, Farid A., Saied M. Soliman, Saleh Atef, et al. "Anticancer Indole-Based Chalcones: A Structural and Theoretical Analysis." Molecules 24, no. 20 (2019): 3728. http://dx.doi.org/10.3390/molecules24203728.

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The crystal structures of five new chalcones derived from N-ethyl-3-acetylindole with different substituents were investigated: (E)-3-(4-bromophenyl)-1-(1-ethyl-1H-indol-3-yl)prop-2-en-1-one (3a); (E)-3-(3-bromophenyl)-1-(1-ethyl-1H-indol-3-yl)prop-2-en-1-one (3b); (E)-1-(1-ethyl-1H-indol-3-yl)-3-(4-methoxyphenyl)prop-2-en-1-one (3c); (E)-1-(1-ethyl-1H-indol-3-yl)-3-mesitylprop-2-en-1-one (3d); and (E)-1-(1-ethyl-1H-indol-3-yl)-3-(furan-2-yl)prop-2-en-1-one (3e). The molecular packing of the studied compounds is controlled mainly by C–H⋅⋅⋅O hydrogen bonds, C–H⋅⋅⋅π interactions, and π···π stack

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39

Zanatta, Nilo, Adriano F. Camargo, Mário A. Marangoni, et al. "Regioselective Synthesis of Pyrazolyl-pyrimidine Hybrids of Pharmacological Interest." Synthesis 52, no. 16 (2020): 2347–56. http://dx.doi.org/10.1055/s-0040-1707948.

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The regioselective synthesis of twenty novel [3-substituted 5-hydroxy-5-(trifluoromethyl)-4,5-dihydro-1H-pyrazol-1-yl][6-aryl-(2-methylthio)pyrimidin-4-yl]methanones from the cyclocondensation reactions of new 6-aryl-2-(methylthio)pyrimidine-4-carbohydrazides with 4-substituted 1,1,1-trifluorobut-3-en-2-ones is reported. Human acetylcholinesterase (HsAChE) and butyrylcholinesterase (HsBChE) inhibition tests were performed on selected products in order to explore the possible pharmacological applications of these compounds. Two compounds showed significant and selective inhibitory activity for

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40

Goyal, Anju, and Sandeep Jain. "Syntheses and Antibacterial Studies of Some 1-Phenyl-3-(4-(2-ethanoloxy) phenyl)-5-aryl-1H-pyrazoles." Journal of Chemistry 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/950491.

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A series of 1-phenyl-3-(4-(2-ethanoloxy) phenyl)-5-aryl-1H-pyrazoles were synthesized from chalcones, that is, 3-aryl-1-(4-hydroxyphenyl) prop-2-en-1-ones and studied for theirin vitroantibacterial activity. Chalcones1on reaction with phenyl hydrazine in the presence of acetic acid and few drops of hydrochloric acid yielded the corresponding 1-phenyl-3-(4-hydroxyphenyl)-5-aryl-1H-pyrazoles2which on further reaction with 2-chloroethanol furnished the title compounds3. These compounds were characterized by CHN analyses, IR, mass and1H NMR spectral data. All the compounds were evaluated for their

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41

Pujari, Vijay Kumar, Srilalitha Vinnakota, Ramana Kumar Kakarla, Sreedhar Maroju, Arram Ganesh, and S. Pervaram. "Microwave Assisted Synthesis and Antimicrobial Activity of (E)-1-{2/3/4-[(1-Aryl-1H-1,2,3-triazol-4-yl)methoxy]phenyl}-3-(2-morpholinoquinolin-3-yl)prop-2-en-1-ones." Russian Journal of General Chemistry 88, no. 7 (2018): 1502–7. http://dx.doi.org/10.1134/s1070363218070241.

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42

Katritzky, Alan R., Jinlong Jiang та Philip A. Harris. "Synthesis of α-(arylideneamino)alkylamines". Canadian Journal of Chemistry 69, № 7 (1991): 1153–55. http://dx.doi.org/10.1139/v91-171.

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α-(Arylideneamino)alkylamines 4 are prepared in high yields by the reaction of 1-(benzotriazol-1-yl)-N-triphenylphosphorylidenemethylamine (betmip) 2 with lithium amides and treatment of the resulting intermediates 3 with aryl aldehydes. Key words: benzotriazole, lithium amides, aryl aldehydes.

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43

Soni, Hetal I., and Navin B. Patel. "PYRIMIDINE INCORPORATED SCHIFF BASE OF ISONIAZID WITH THEIR SYNTHESIS, CHARACTERIZATION AND IN VITRO BIOLOGICAL EVALUATION." Asian Journal of Pharmaceutical and Clinical Research 10, no. 10 (2017): 209. http://dx.doi.org/10.22159/ajpcr.2017.v10i10.19302.

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Objective: Versatile biological activities of nitrogen containing heterocycles in medicinal chemistry, mainly pyrimidine and pyridine ring based heterocyclic moieties are very important. Pharmaceutical important of pyrimidine and isoniazid moiety prompted us to synthesize isoniazid clubbed pyrimidine derivatives and evaluated for antimicrobial and antituberculosis activity.Method: 2-(2-(3-bromo benzylidene)-1-isonicotinoyl hydrazinyl)-N-(4-(substituted phenyl)-6-(substituted aryl) pyrimidin-2-yl) acetamide 2(A-J) have been synthesized by condensation reaction of 2-chloro-N-[4-(substituted phen

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44

Steinmetz, Maxime, and David Sémeril. "Homo- Versus Hetero- [2+2+2] Rhodium-Catalyzed Cycloaddition: Effect of a Self-Assembled Capsule on the Catalytic Outcome." Molecules 30, no. 14 (2025): 3052. https://doi.org/10.3390/molecules30143052.

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The cationic chloro-P-{[4-(diphenylphosphanyl)phenyl]-N,N-dimethylmethanammonio(norbornadiene)rhodium(I) complex was encapsulated inside a self-assembled hexameric capsule. This capsule was obtained through a reaction involving 2,8,14,20-tetra-undecyl-resorcin[4]arene and water in chloroform. The formation of an inclusion complex was deduced from a combination of spectral measurements (UV-visible spectroscopy, 1H, 31P{1H} NMR and DOSY). The rhodium complex was evaluated in the [2+2+2] cycloaddition between N,N-dipropargyl-p-toluenesulfonamide and arylacetylene derivatives. In the presence of t

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45

Pranay, Shah, I. Patel R., and J. Vyas P. "Preparation and Biological Screening of Novel Heterocyclic Compounds." International Journal of Trend in Scientific Research and Development 3, no. 3 (2019): 632–36. https://doi.org/10.31142/ijtsrd22815.

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The Pyrimidone derivatives say, N arylidine 6 methyl 2 oxo 4 phenyl 1,2,3, 4 tetrahydropyrimidonecarbohydrazides 2a e were synthesized by condensation of Benzaldehyde derivatives with 6 Methyl 2 oxo 4 phenyl 1,2,3,4 tetrahydro pyrimidone carbohydrazides 1 in good yield. The so called hydrazone were cyclocondensed with succinic anhydride to afford 1 6 methyl 2 oxo 4 phenyl 1,2,3, 4 tetrahydropyrimidone 5 carboxamido 5 oxo 2 aryl pyrrolidine 3 carboxylic acid 3a e . These 3a e on Mannich reaction with formaldehyde and morpholine offered 2 aryl 1 6 methyl 2 oxo 4 phenyl 1, 2, 3, 4 tetrahydropyrim

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A, Kumar Maddineni, Rao Chunduri V, and Raju Begari N. "Synthesis and Characterization of Novel Mono Carbonyl Curcumin Analogues of Pyrazole Derivatives." Der Pharma Chemica 13, no. 1 (2021): 6. https://doi.org/10.5281/zenodo.13644078.

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(E)-4-aryl-1-phenyl-1H-pyrazol-4-yl)but-3-en-2-one derivatives were (4a-d) synthesized by the condensation of 3-aryl-1-phenyl-1H-pyrazole-4- carbaldehyde derivatives (3a-d) with acetone in the presence of sodium hydroxide. Compounds (4a-d) on condensation with different aldehydes give mono carbonyl curcumin analogues (MACs) of pyrazole derivatives (6a-x) in good yield.

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47

Ranjan, Khunt, Datta Neela, Bharmal Fatema, and R. Parikh A. "Synthesis and biological evaluation of 3-aryl-2-(2-chloro-7- methoxyquinolin-3-yl)-4-thiazolidinones." Journal of Indian Chemical Society Vol. 78, Jan 2001 (2001): 47–48. https://doi.org/10.5281/zenodo.5872914.

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Department of Chemistry, Saurashtra University, Rajkot-360 005, India <em>Manuscript received 30 September 1999, revised 25 July 2000, accepted 22 September 2000</em> 3-Aryl-2-(2-chloro-7-methoxyquinolin-3-yI)-4-thiazolidinones (3a-m, 4a-m) have been synthesised by the condensation of thioglycolic acid/thiolactic acid with <em>N</em>-aryl-(2-chloro-7-methoxyquinolin-3-yl) azomethine (2a-m) which in turn are prepared from arylamine and 2-chloro-7-methoxyquinoline-3-carboxaldehyde (1). The products have been evaluated for their antibacterial and antifungal activities

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48

D., H. Vyas, D. Tala S., F. Dhaduk M., D. Akbari J., and S. Joshi H. "Synthesis, antitubercular and antimicrobial activities of some new pyrazoline and isoxazole derivatives." Journal of Indian Chemical Society Vol. 84, Nov 2007 (2007): 1140–44. https://doi.org/10.5281/zenodo.5824658.

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Department of Chemistry, Saurashtra University, Rajkot-360 005, Gujarat, India <em>E-mail </em>: drhsjoshi49@gmail.com <em>Manuscript received 23 November 2006, revised 6 June 2007, accepted 17 August 2007</em> Cyclocondensation of hydrazine hydrate with (2<em>E</em>)-1-(3,5 dibromo-4-methoxyphenyl)-3-aryl-prop-2-en-1-ones (1a-j) in glacial acetic acid afford corresponding 1-acetyl-3-(3,5-dibromo-4-methoxyphenyl)-5-aryl-4,5-dihydro-1<em>H</em>-pyrazoles (2a-j). While the compounds 1a-j on reaction with hydroxylamine hydrochloride in presence of acetic acid and sodium acetate to give 3-(3,

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49

Shaibah, Mohammed A. E., Hemmige S. Yathirajan, Nagaraj Manju, Balakrishna Kalluraya, Ravindranath S. Rathore, and Christopher Glidewell. "Two isostructural 3-(5-aryloxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)-1-(thiophen-2-yl)prop-2-en-1-ones: disorder and supramolecular assembly." Acta Crystallographica Section E Crystallographic Communications 76, no. 1 (2020): 48–52. http://dx.doi.org/10.1107/s205698901901658x.

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Two new chalcones containing both pyrazole and thiophene substituents have been prepared and structurally characterized. 3-(3-Methyl-5-phenoxy-1-phenyl-1H-pyrazol-4-yl)-1-(thiophen-2-yl)prop-2-en-1-one, C23H18N2O2S (I), and 3-[3-methyl-5-(2-methylphenoxy)-1-phenyl-1H-pyrazol-4-yl]-1-(thiophen-2-yl)prop-2-en-1-one, C24H20N2O2S (II), are isomorphous as well as isostructural, and in each the thiophene substituent is disordered over two sets of atomic sites having occupancies 0.844 (3) and 0.156 (3) in (I), and 0.883 (2) and 0.117 (2) in (II). In each structure, the molecules are linked into sheet

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C., S. ANDOTRA, C. LANGER T., and KOTHA AMRITA. "Synthesis and Antifungal Activity of some Substituted 1,3,4-Thiadiazolo[3,2-a]-s-triazin-5-phenyl-7-thiones and Imidazo-[2, 1-b ]-1,3,4-thiadiazol-5-ones." Journal of Indian Chemical Society Vol. 74, Feb 1997 (1997): 125–27. https://doi.org/10.5281/zenodo.5875250.

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Department of Chemistry. University of Jammu, Jammu-180 004 <em>Manuscript received 25 October !994. revised 4 July 1995, accepted 4 August 1995</em> 2-Amino-5-aryl-substituted-1,3,4-thiadiazoles (1) have been refluxed with benzoyllsothiocyanate to get N-[5-aryl-substituted-1,3,4- thiadiazol-2-yl)-<em>N</em>-benzoyl thlonreas (1a). These on refluxing with PCI<sub>5</sub> and POCI<sub>3</sub> give 2-aryl-substituted-1,3,4-thiadiazolo[3,2-<em>a</em>]-<em>s</em>- triazin-5-phenyl-7-thiones (3). Compound 1 on refluxing with chloroacetic acid and anhydrous sodium acetate gives 2-substitut

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