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Journal articles on the topic 'Hydroxy compounds'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Behrami, Aziz, and Kozeta Vaso. "Antibacterial activity of coumarine derivatives synthesized from 4-amino7-chloro-2-oxo-2H-chromen -3-carbaldehyde and comparison with standard drug." JOURNAL OF ADVANCES IN CHEMISTRY 12, no. 6 (2017): 4108–11. http://dx.doi.org/10.24297/jac.v12i6.6153.

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In present paper , we report the organic syntheses of three compounds from 4-Amino-7-chloro -2-oxo-2H â€“chromen -3carbaldehyde and describe the results of antibacterial activity of purified compounds.7-Chloro-4-[(2-hydroxy-benzylidene)amino]-2-oxo-2H-chromen-3-carbaldehyde(1a).4-[(2-Hydroxy-benzylidene)-amino]-7-(4-hydroxy-phenylamino)-2-oxo-2Hchromen-3-carbaldehyde (2a) ,([4-[(2-Hydroxy-benzylidene)-amino]-7-(4-hydroxyl-phenylamino)-2-oxo-chromen-3ylmethylene]-amino)-acetic acid (3a),have been synthesized and characterized using melting points , IR spectra , 1H-NMR and 13C-NMR spectra. The a

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2

Kamble, Pallavi, and Sailesh Wadher. "SYNTHESIS, IN VITRO ANTIOXIDANT AND ANTIMICROBIAL EVALUATION OF 3-HYDROXY CHROMONE DERIVATIVES." Asian Journal of Pharmaceutical and Clinical Research 11, no. 3 (2018): 259. http://dx.doi.org/10.22159/ajpcr.2018.v11i3.22984.

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Objective: The objective of the present study was to synthesize a series of 3-hydroxychromone derivatives and to evaluate its in vitro antioxidant and antimicrobial activities.Methods: 3-hydroxy chromones were synthesized using an algar flynn oyamada method which includes oxidative cyclization of 2-hydroxy chalcones in basic solution by hydrogen peroxide. 2-hydroxy chalcones were synthesized by Claisen-Schmidt condensation of substituted 2-hydroxy acetophenones with substituted aromatic aldehydes using polyethylene glycol-400 as a recyclable solvent. The synthesized compounds were evaluated fo

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3

Yang, Nian-Yun, Yi-Fang Yang, and Kun Li. "Analysis of Hydroxy Fatty Acids from the Pollen of Brassica campestris L. var. oleifera DC. by UPLC-MS/MS." Journal of Pharmaceutics 2013 (October 10, 2013): 1–6. http://dx.doi.org/10.1155/2013/874875.

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Ultraperformance liquid chromatography coupled with negative electrospray tandem mass spectrometry (UPLC-ESI-MS/MS) was used to determine 7 hydroxy fatty acids in the pollen of Brassica campestris L. var. oleifera DC. All the investigated hydroxy fatty acids showed strong deprotonated molecular ions [M–H]−, which underwent two major fragment pathways of the allyl scission and the β-fission of the alcoholic hydroxyl group. By comparison of their molecular ions and abundant fragment ions with those of reference compounds, they were tentatively assigned as 15,16-dihydroxy-9Z,12Z-octadecadienoic a

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4

Al-Hazmy, Sadeq M., Mohamed Oussama Zouaghi, Jamal N. Al-Johani, et al. "Chemosensing Properties of Coumarin Derivatives: Promising Agents with Diverse Pharmacological Properties, Docking and DFT Investigation." Molecules 27, no. 18 (2022): 5921. http://dx.doi.org/10.3390/molecules27185921.

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In this work, a three-component reaction of 3-acetyl-4-hydroxycoumarine, malononitrile, or cyanoacetate in the presence of ammonium acetate was used to form coumarin derivatives. The chemical structures of new compounds were identified by 1H, 13C NMR and an elemental analysis. These compounds were examined in vitro for their antimicrobial activity against a panel of bacterial strains. In addition, these compounds were investigated for antioxidant activities by superoxideradical, DPPH (2,2-Diphenyl-1-picrylhydrazyl), and hydroxyl radical scavenging assays, in which most of them displayed signif

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5

J., A. Patel, D. Mistry B., and R. Desai K. "Synthesis of some novel 4-thiazolidinone compounds and their application as potential antimicrobial agent." Journal of Indian Chemical Society Vol. 83, Oct 2006 (2006): 1041–43. https://doi.org/10.5281/zenodo.5831373.

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Department of Chemistry, B. K. M. Science College, Valsad-396 001, Gujarat, India <em>Manuscript received 14 July 2005, revised 4 January 2006, accepted 28 June 2006</em> 3-Chloro-1-[5' -hydroxy-2' -(phenyldiazenyl) phenyll-4-[2" -hydroxy-5" -(1<em>"' </em>,3<em>'"</em> -benzothiazol-2<em>"'</em> -yl-diazenyl)phenyl)-2-azetidinone (4a-p),3-[5'-hydroxy-2'-(phenyldiazenyl)phenyl]-2-[2" -hydrox)·-5" -(1"' ,3'" -benzothiazol-2"' -yl-diazenyl) phenyl)- 4-thiazolidinone (Sa-p) and 3-[5' -hydroxy-2&#3

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6

Coleman, W. M., and Bert M. Gordon. "Examinations of the Matrix Isolation Infrared Spectra of Organic Compounds: PART XIII." Applied Spectroscopy 43, no. 2 (1989): 305–10. http://dx.doi.org/10.1366/0003702894203246.

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Matrix isolation Fourier transform infrared (MI/FT-IR) spectra have been collected on a series of internal alkenes, a series of hydroxy-substituted ketones, and a series of hydroxy-substituted esters. Assignments of double bond position and geometry are possible in the alkenes, due to the resolution of absorption bands of very similar energies. The location of the absorption bands for the alkenes was found to be very similar to the values found for the vapor-phase and condensed-phase spectra. Multiple carbonyl absorptions have been found in the MI/FT-IR spectra of the hydroxy ketones and hydro

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7

Rubtsova, Daria D., Alexandra A. Bobyleva, Daria D. Lezhnina, Sofia V. Polikarpova, Polina A. Rozhkova, and Vladimir L. Gein. "Synthesis of 5-aryl-3-hydroxy-1-(2-hydroxypropyl)-4-(furyl-2-carbonyl)- 3-pyrrolin-2-ones and 5-aryl-3-hydroxy-1-(3-hydroxypropyl)- 4-(furyl-2-carbonyl)-3-pyrrolin-2-ones." Butlerov Communications 63, no. 9 (2020): 26–30. http://dx.doi.org/10.37952/roi-jbc-01/20-63-9-26.

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In this work, pyrrolidin-2-ones and their derivatives are considered as a promising class of non-aromatic heterocyclic compounds. Their structure is found in the nuclei of many natural products and biologically active molecules. In pharmacy the possibility of introducing various substituents into the nucleus of pyrrolidin-2-ones is a great importance for the synthesis of new medicinal molecules with improved biological activity. Nowadays the synthesis of new active compounds by introducing various substituents at the C1-, C4- and C5-position of 3-hydroxy-3-pyrrolin-2-one has been little studie

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8

Bezuglov, A. N., L. G. Minyaeva, K. A. Lysenko, and V. V. Mezheritskii. "peri-hydroxy acenaphthoyl compounds." Russian Journal of Organic Chemistry 46, no. 3 (2010): 336–43. http://dx.doi.org/10.1134/s1070428010030061.

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9

Ribeiro da Silva, Ana Luisa, and Maria D. M. C. Ribeiro da Silva. "Energetic and Structural Studies of Two Biomass-Derived Compounds: 6- and 7-hydroxy-1-indanones." Applied Sciences 10, no. 23 (2020): 8512. http://dx.doi.org/10.3390/app10238512.

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The energetic study of 6-hydroxy-1-indanone and 7-hydroxy-1-indanone was performed using experimental techniques and computational calculations. The enthalpies of combustion and sublimation of the two compounds were determined and allowed to derive the corresponding gas-phase standard molar enthalpies of formation. For this purpose, static-bomb combustion calorimetry and drop-method Calvet microcalorimetry were the experimental techniques used. Further, the enthalpy of fusion of each compound was obtained from scanning differential calorimetry measurements. Additionally, the gas-phase standard

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10

Duke, Stephen O., and John Lydon. "Herbicides from Natural Compounds." Weed Technology 1, no. 2 (1987): 122–28. http://dx.doi.org/10.1017/s0890037x00029304.

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Phytotoxic compounds from plants and microorganisms represent a wide range of chemistries and mechanisms of action that have potential in the design and development of new herbicides. Although several natural products of higher plants have been patented as herbicides, none have been developed commercially. Many microbial products have been patented as herbicides and several have been or are being developed, including bialophos {L-2-amino-4-[(hydroxy)(methyl)phosphinoyl] -butyryl-L-alanyl-L-alanine} and glufosinate [L-2-amino-4-(hydroxyl)(methyl)(phosphinoyl)-butyric acid]. The new tools of mol

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11

Jia, Yong Hui. "Technical Study on Relationship between Terpene Phenolic Compounds and Health." Advanced Materials Research 518-523 (May 2012): 529–32. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.529.

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The hydroxy derivatives of aromatic hydrocarbons which have hydroxyl getup directly attached to the ring are called phenols. Small amounts of water dissolved in phenol lower the melting point to below the room temperature. This paper summarized the bioactivities and safety issues of Terpene Phenolic, and its functions, biosynthetic mechanisms, characteristics and clearing strategies of terpene phenolic compounds.

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12

Yang, Jian Qiong, Hai Liu, Lei Peng, and Guo An Luo. "Study on Terpene Phenolic Compounds and its Health Effects." Advanced Materials Research 1004-1005 (August 2014): 924–27. http://dx.doi.org/10.4028/www.scientific.net/amr.1004-1005.924.

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Hydroxy derivatives of aromatic hydrocarbons, have hydroxyl getup directly attached to the ring, which is called phenols. This paper study the bioactivities and safety issues of Terpene Phenolic and its functions, characteristics and clearing strategies of terpene phenolic compounds, so as its biosynthetic mechanisms. The results show that the small amounts of water dissolved in phenol lower the melting point to below the room temperature.

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13

Oliveira, Raquel, Nelson Pereira, Dulce Geraldo, and Fátima Bento. "Reactivity of hydroxy-containing aromatic compounds towards electrogenerated hydroxyl radicals." Electrochimica Acta 105 (August 2013): 371–77. http://dx.doi.org/10.1016/j.electacta.2013.04.124.

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14

Maulidiyah, Maulidiyah, A. Herry Cahyana, and Wahyudi Priyono Suwarso. "A NEW PHENOLIC COMPOUND FROM ACETONE EXTRACT OF LICHEN Usnea flexuosa Tayl." Indonesian Journal of Chemistry 11, no. 3 (2011): 290–94. http://dx.doi.org/10.22146/ijc.21395.

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Natural product, 2'-hydroxy-1'-(4-hydroxyl-5-methoxy-2-methyl-phenyl)-ethanon, (1), was isolated from the thalli lichen Usnea flexuosa Tayl. together with the known (-) - usnic acid (2). The structure of compounds 1 and 2 were determined by the spectroscopic studies.

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15

Buděšínský, Miloš, Alexander Kasal, Želimír Procházka, Huynh Kim Thoa, Soňa Vašíčková та Pavel Kočovský. "Revision of the structure of 3-methoxy-14α-hydroxy-D-homo-1,3,5-(10)-estratrien-17a-one. A simple 1H NMR method for the determination of configuration of hydroxy group in position 5 and/or 14 of the D-homo-steroid skeleton". Collection of Czechoslovak Chemical Communications 56, № 7 (1991): 1512–24. http://dx.doi.org/10.1135/cccc19911512.

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Eignerova and Prochazka found in 1974 the Cotton effect value for 3-methoxy-14α-hydroxy-D-homo-1,3,5(10)-estratrien-17a-one (Ia) to be Δε – 2.76.Calculation of the Δε value for this compound led, however, to a substantially lower value, which suggested the hypothesis that the compound was in fact rather an epimer with the hydroxy group in position 14β. This hypothesis was studied by means of 1H NMR spectra of synthetic models, using the changes of the chemical shifts of angular methyls, induced by in situ acylation of the angular hydroxyl with an α- or β-configuration with trichloroacetyl isoc

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16

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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17

Traven, Valery F., Vadim V. Negrebetsky, Larisa I. Vorobjeva, and Edward Andrew Carberry. "Keto–enol tautomerism, NMR spectra, and H–D exchange of 4-hydroxycoumarins." Canadian Journal of Chemistry 75, no. 4 (1997): 377–83. http://dx.doi.org/10.1139/v97-043.

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4-Hydroxycoumarin 1, 4,5-dihydroxycoumarin 2, and 4,7-dihydroxycoumarin 3 undergo H–D exchange at the C(3) atom of the lactone ring. Although only the 4-hydroxy-2-chromenone tautomeric forms are seen in the 1H and 13C NMR spectra of compounds 1–3, the equilibrium between the 4-hydroxy-2-chromenone and 2,4-chromandione forms is suggested to be the key step in the H–D exchange reaction. 4,5-Dihydroxycoumarin shows the highest rate of the reaction, since H-bonding between 5-hydroxyl and 4-keto functional groups can provide relative stability to the 5-hydroxy-2,4-chromandione tautomeric form, a pr

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18

Bajaj, Prachi, Shivlingrao Mamle Desai, Pearl Dighe, Soniya Naik, and Bheemanagouda Biradar. "SYNTHESIS OF 4-HYDROXY-3-(1-HYDROXY-2-(SUBSTITUTEDAMINO)ETHYL)-1-PHENYL/ METHYL QUINOLIN-2(1H)-ONE AS ANTICANCER AGENTS." Asian Journal of Pharmaceutical and Clinical Research 10, no. 8 (2017): 225. http://dx.doi.org/10.22159/ajpcr.2017.v10i8.18836.

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Objective: The current work is concerned with the synthesis of a series of 4-hydroxy-3-(1-hydroxy-2-(substituted amino)ethyl)-1-phenyl/ methylquinolin-2(1H)-one[III-a(1-5)/III-b(1-5)] and evaluation of its in vitro anticancer activity.Methods: The starting material for linomide analogs was synthesized by following literature procedures. The carbonyl group was reduced to hydroxyl group using sodium borohydride, and the methyl group was brominated using bromine in acetic acid. Further bromine was nucleophilically substituted by primary amines. All the synthesized compounds were satisfactorily ch

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19

Duan, Jin-ao, Pengfei Hou, Yuping Tang, Pei Liu, Shulan Su, and Hanqing Liu. "A New Sesquiterpene and other Constituents from Saussurea Lappa Root." Natural Product Communications 5, no. 10 (2010): 1934578X1000501. http://dx.doi.org/10.1177/1934578x1000501002.

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Five sesquiterpenes, dehydrocostus lactone (1), santamarine (5), β-cyclocostunolide (6), 4α-hydroxy-4β-methyldihydrocostol (7) and 10α-hydroxyl-artemisinic acid (9), along with four other compounds, β-sitosterol (2), daucosterol (3), 5-hydroxy-methyl-furaldehyde (4), and trans-syingin (8), were isolated and identified from the roots of Saussurea lappa (Compositae). Based on previous reports and our study, sesquiterpene derivatives are common and characteristic constituents of the genus Saussurea. Among the nine compounds obtained, 9 is a new sesquiterpene. It is an artemisinic acid derivative,

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20

Tugai, O. V., V. S. Kosobutskii, R. L. Sverdlov, S. D, Brinkevich, and S. B. Lastovskii. "Radiation-Initiated Dehalogenation of Organofluorine Compounds in Aqueous Solutions." Химия высоких энергий 57, no. 3 (2023): 206–10. http://dx.doi.org/10.31857/s0023119323030154.

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The γ-radiolysis of 2-fluoroethanol-1, 2,2,2-trifluoroethanol-1, 3-fluoropropanol-1, and 4,4,4- trif luorobutanol-1 in aqueous solutions in an inert atmosphere or in the presence of oxygen has been studied. It has been found that the dehalogenation of hydroxyl-containing organic compounds is induced by •ОН and Н• radicals rather than hydrated electrons. The carbon-centered α-hydroxy-β-fluoroethyl radicals FCH2–•CHOH are def luorinated much more efficiently than α-fluoroalkyl radicals, both vicinal (F–•CHCH2OH) and nonvicinal (F–•CHCH2CH2OH). In the absence of oxygen, α-fluoroalkyl radicalselim

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21

Svarc, Federico. "Synthesis of dibenzoylmethane-flavonoid hybrids as potential uv filters. Hybrids of chalcones." Archives of Clinical and Experimental Pathology 1, no. 1 (2022): 01–07. http://dx.doi.org/10.31579/2834-8508/002.

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Background: It has been reported that chalcones (a family of flavonoids) have activity as UV rays absorbers. Previously we have reported that the compounds2´-hydroxy-4- methoxychalcone and 2´-hydroxy-4-methoxy dibenzoylmethane have the basic properties of UVA filters (both show their maximum absorption in the range 350-370 nm with good photostability) Objective: in this work, we describea new series of chalcone-dibenzoylmethane hybrid candidates as synthetic UV filtersand flavonoids Method: The compounds resultedfrom multi step synthesisstarting from 4-formylbenzoic acid and 2´- hydroxy acetop

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22

S., GOPALAKRISHNAN, NEELAKANIAN S., and V. RAMAN P. "Visible Absorption Spectra of Anthraquinones : Use of Shift Reagents in Structure Determination." Journal of Indian Chemical Society Vol. 67, May 1990 (1990): 390–93. https://doi.org/10.5281/zenodo.6163405.

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Department of Chemistry, Madurai Kamaraj University Post-Graduate Extension Centre, Palayamkottai-627 002 Department of Natural Products Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai-625 021 <em>Manuscript received 13 July 1989, accepted 21 November 1989</em> A careful analysis of the bathochromic shifts induced by the usual shift reagents on the 'last visible band' (LVB) of the visible absorption spectra of twentysix hydroxyanthraquinones has revealed the usefulness of these shift reagents in the allocation of the hydroxyl groups in these compounds. Empirica

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23

Everest, DJ, PK Grant, GC Slim, and IKL Yeo. "A Mechanism for Anomalous Ozonolysis." Australian Journal of Chemistry 41, no. 7 (1988): 1025. http://dx.doi.org/10.1071/ch9881025.

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Following the ozonolysis of a series of allylic hydroxy olefins derived from manool (6) we propose a mechanism which accounts for the anomalous ozonolysis products of allylic hydroxyl compounds in nucleophilic and non- nucleophilic solvents. It involves intramolecular participation by the allylic hydroxyl to form a hydroperoxy epoxide rather than the 1,2- nucleophilic migration from carbon to oxygen as proposed in the Criegee rearrangement mechanism.

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24

Hu, Thomas Q., Graham R. Cairns, and Brian R. James. "Removal of Phenolic Hydroxyl Groups in Lignin Model Compounds and Its Effect on Photostability." Holzforschung 54, no. 2 (2000): 127–32. http://dx.doi.org/10.1515/hf.2000.022.

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Summary The phenolic hydroxyl groups in the lignin model compounds, 2-methoxy-4-propylphenol and 4-hydroxy-3-methoxyacetophenone, were removed by first converting the hydroxyl groups to the trifluoromethanesulfonates (triflates) and then cleaving the triflate substituents via catalytic hydrogen transfer. The products, 1-methoxy-3-propylbenzene and 3-methoxyacetophenone, were characterized by 1H and 13C NMR, mass spectrometry and elemental analyses. The effect of the removal of the phenolic groups on the photostability of the model compounds was evaluated by impregnating the compounds into What

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25

Begum, Shaheen, V. Anitha Kumari, S. K. Arifa Begum, M. Reddemma, K. Tejaswini, and K. Bharathi. "Synthesis and Evaluation of 1,2,4-Triazole Derivatives for Antioxidant, Anti-inflammatory, Cytotoxicity and QSAR Analysis." Asian Journal of Chemistry 35, no. 1 (2022): 194–202. http://dx.doi.org/10.14233/ajchem.2023.26878.

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A series of novel 4-amino-5-substituted-1,2,4-triazole-3-thiol derivatives (B1-B18) were synthesized and characterized by spectral analysis. Equimolar portions of thiocarbohydrazide and different acids (substituted aryl/heteroaryl/aliphatic) were fused to synthesize the title compounds. The compounds were evaluated for cytotoxicity, in vitro anti-inflammatory activity and antioxidant activities. Cytotoxicity studies highlighted B4 (2,4-dichloro analog) as the potent cytotoxic molecule with IC50 value of 20.35 μM against MCF-7 cell line compared to cisplatin (IC50 = 12.06 μM). B4 (2,4-dichloro)

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26

D.Bharathi, P. Valentina та N. Ramalakshmi. "MOLECULAR DOCKING OF NOVEL BENZOPYRAN ANALOGUES AND INHIBITION PROPERTIES OF ANTIDIABETIC AGENTS AGAINST α-AMYLASE AND αGLUCOSIDASE". RASAYAN Journal of Chemistry 15, № 04 (2022): 2873–78. http://dx.doi.org/10.31788/rjc.2022.1547075.

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Alpha amylase and alpha-glucosidase inhibitors play a key role in treating diabetes mellitus. Based on this idea the present study aimed in designing different benzopyran analogs and investigate the binding interaction with protein PDB: 1HNY and PDB:5NN3 through molecular docking by autodockpyrx. The results evaluated by docking studies found that different substituted derivatives of 4-Hydroxycoumarine, 3-acetyl 4-hydroxy coumarin, 8 hydroxycoumarine, 7-hydroxycoumarine, 4-hydroxy, 5-methoxycoumarine compounds and compared with standard quercetin which is the target protein. The compound showi

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27

Egorova, D. O., T. I. Gorbunova, M. G. Pervova, et al. "Bacterial degradation of a mixture of hydroxy- and metoxypolychlorinated biphenyls." Доклады Академии наук 486, no. 3 (2019): 307–11. http://dx.doi.org/10.31857/s0869-56524863307-311.

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In this work, the possibility of combining the methods of chemical functionalization of a mixture of polychlorinated biphenyls before the formation of a mixture of hydroxy- and methoxy-chlorinated biphenyls and the bacterial transformation of the compounds obtained with the aim of their utilization was investigated. As a result of a 100% conversion, a mixture of compounds identified as methoxy- (30 compounds), hydroxy- (44 compounds) and methoxy (hydroxy) derivatives (47 compounds) was obtained by reacting a mixture of Sovol with MeONa in MeOH and DMSO. PCB congeners. The total content of all

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28

Kadirvelraj, Renuka, Paul N. Handley, Ward T. Robinson, Raymond M. Carman та Maurice D. Sutherland. "The Stereochemical Structures of the Furanosesquiterpenoidal β-Hydroxy Ketones from the Myoporaceae". Australian Journal of Chemistry 52, № 8 (1999): 727. http://dx.doi.org/10.1071/ch99045.

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Four furanosesquiterpene β-hydroxy ketones previously isolated from Myoporum spp., and given tentative names, are now assigned complete stereostructures from n.m.r. and X-ray data. The compounds are (5R,7R,9S)-9-hydroxy-5,9-dihydromyomontanone (Woogaroo) (1a), (5S,7R,9R)-9-hydroxy-5,9-dihydro- myomontanone (Redbank) (1b), (5R,7R,9R)-9-hydroxy-5,9-dihydromyomontanone (Perillup) (1c) and (4S,7S,8R)-4-hydroxy-10,11-didehydro-4,8-dihydromyodesmone (Carney's ketol) (2a). The stereo- structures of two other previously reported compounds, Kindon ketol ((4S,7S,8R)-4-hydroxy-4,8- dihydromyodesmone) (2b

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29

Bilgi, Gözde Turhan, and Neslihan Demir. "Investigation of the Biological Activities of Sulfonamide-Based Imine Compounds." Euroasia Journal of Mathematics, Engineering, Natural & Medical Science 10, no. 28 (2023): 143–55. https://doi.org/10.5281/zenodo.8237772.

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In this study, three sulfonamide-based Schiff bases were prepared: 4-Fluoro-N-(2-hydroxy-5-methylbenzylidene) benzenesulfonamide (C<strong>1</strong>), 4-Fluoro-N-(2-hydroxy-5-nitrobenzylidene) benzenesulfonamide (C<strong>2</strong>) and 4-Fluoro-N-((2-hydroxynaphthalen-1-yl)methylene) benzenesulfonamide (C<strong>3</strong>). DNA cleavage and binding capabilities of the prepared compounds were investigated agarose gel electrophoresis and by UV-Vis spectroscopy, and their antioxidant capacities were investigated <em>in vitro</em> by DPPH, ABTS, FRAP, CUPRAC, superoxide and hydroxyl radical sc

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30

Shit, Ranjt Kumar, and Nitai Chand Sinha. "High degree of regioselectivity during the synthesis of new allylcoumarins employing thermal Claisen rearrangement." INDIAN JOURNAL OF HETEROCYCLIC CHEMISTRY 34, no. 03 (2024): 431. http://dx.doi.org/10.59467/ijhc.2024.34.431.

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Allyloxycoumarins (3,4) and ethyl 2-allyloxycinnamates (27, 28) were converted into 7-hydroxy-8- allylcoumarins (5,6), 2-hydroxy-3-allyl-4-methoxy-E-cinnamate ester (29), and 2-hydroxy-3-acetyl-4-methoxy-5-allyl cinnamate ester (30) by thermal Claisen rearrangement. The compounds 7-hydroxy-8-allylcoumarins (5,6) and 2-hydroxy-3- allyl cinnamate (30) on acylation or benzoylation, followed by Fries rearrangement gave 6-acetyl-7-hydroxy-8-allylcoumarins (15-20), 6-benzoyl-7-hydroxy-8-allylcoumarins (21,22), and 2-hydroxy-3-allyl-4-methoxy-5-acetylcoumarin (31). The compounds (33) and (30) underwe

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31

Popoola, Olugbenga K., Jeanine L. Marnewick, Emmanuel I. Iwuoha, and Ahmed A. Hussein. "Methoxylated Flavonols and ent-Kaurane Diterpenes from the South African Helichrysum rutilans and Their Cosmetic Potential." Plants 12, no. 15 (2023): 2870. http://dx.doi.org/10.3390/plants12152870.

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Chromatographic fractionation of a methanol extract of Helichrysum rutilans afforded seven known compounds. The isolated compounds were identified as 5,7,8-trihydroxy-3,6-dimethoxyflavone-8-O-2-methyl-2-butanoate (C-1), 5,7-dihydroxy-3,6,8-trimethoxyflavone (C-2), 5-hydroxy-3,6,7,8-tetramethoxyflavone (C-3), 5-hydroxy-3,6,7-trimethoxyflavone (C-4), ent-kaurenoic acid (C-5), ent-kauran-18-al (C-6), and 15-α-hydroxy-(-)-ent-kaur-16-en-19-oic acid (C-7). Compounds C-1–C-4 demonstrated high antioxidant capacities on ORAC hydroxyl radical (2.114 ± 4.01; 2.413 ± 6.20; 1.924 ± 16.40; 1.917 ± 3.91) ×

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Han, Yong-Jun. "Syntheses, Crystal Structures and Xanthine Oxidase Inhibitory Activity of Aroylhydrazones." Acta Chimica Slovenica 69, no. 4 (2022): 928–36. http://dx.doi.org/10.17344/acsi.2022.7817.

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A series of hydrazones, (E)-N’-(4-hydroxy-3-methoxybenzylidene)-4-nitrobenzohydrazide (1), (E)-4-(dimethylamino)-N’-(4-hydroxy-3-methoxybenzylidene)benzohydrazide (2), N’-(2-hydroxy-5-methylbenzylidene)-4-nitrobenzohydrazide (3) and 2-fluoro-N’-(2-hydroxy-5-methylbenzylidene)benzohydrazide (4), were prepared and structurally characterized by elemental analysis, IR and 1H NMR spectra, and X-ray single crystal determination. The xanthine oxidase inhibitory activities of the compounds were investigated. Among the compounds, N’-(3-methoxybenzylidene)-4-nitrobenzohydrazide (1) showed the strongest

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33

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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VOSTRIKOVA, Tatiana V., Vladislav N. KALAEV, Svetlana M. MEDVEDEVA, Nadezhda P. NOVICHIKHINA, and Khidmet S. SHIKHALIEV. "SYNTHESIZED ORGANIC COMPOUNDS AS GROWTH STIMULATORS FOR WOODY PLANTS." Periódico Tchê Química 17, no. 35 (2020): 327–37. http://dx.doi.org/10.52571/ptq.v17.n35.2020.29_vostrikova_pgs_327_337.pdf.

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The effect of synthesized organic compounds of 6-hydroxy-2,2,4-trimethyl-1,2-dihydroquinoline, its derivatives, and hydrogenated analogs on the height of seedlings of ornamental woody plants was studied. The height of seedlings as a morphometric parameter was measured 7 months after the start of the experiment. The pre-sowing seed treatment of Rhododendron ledebourii and Rhododendron smirnowii, with the studied compounds, demonstrated that dihydro- and tetrahydroquinoline with the concentration of 0.1% proved to be the most efficient. Dihydroquinolines at concentrations of 0.05 and 0.1% proved

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Wang, Rui, Chaolong Rao, Qiuyan Liu, and Xiong Liu. "Degradation and Transformation Mechanisms of Zanthoxylum Alkylamides Exposed to UVB Light." Foods 12, no. 24 (2023): 4392. http://dx.doi.org/10.3390/foods12244392.

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Zanthoxylum oleoresin, a concentrated extract derived from Zanthoxylum bungeanum, is rich in non-volatile, intensely flavorful substances and amide compounds, such as hydroxy-α-sanshool, hydroxy-β-sanshool, and hydroxy-ε-sanshool. The production process of Zanthoxylum oleoresin remains unstandardized, and there is still a lack of research on the precise classification and quantification of its key chemical constituents, as well as the stability of these compounds when produced using different extraction methods. This study utilized preparative liquid chromatography to extract and purify amide

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36

Liu, Xiao-Lei, Julius S. Lipp, Jeffrey H. Simpson, Yu-Shih Lin, Roger E. Summons, and Kai-Uwe Hinrichs. "Mono- and dihydroxyl glycerol dibiphytanyl glycerol tetraethers in marine sediments: Identification of both core and intact polar lipid forms." Geochimica et Cosmochimica Acta 89 (April 28, 2012): 102–15. https://doi.org/10.1016/j.gca.2012.04.053.

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Abstract Hydroxylated glycerol dialkyl glycerol tetraethers (hydroxy-GDGTs) were detected in marine sediments of diverse depositional regimes and ages. Mass spectrometric evidence, complemented by information gleaned from two-dimensional (2D) <sup>1</sup>H–<sup>13</sup>C nuclear magnetic resonance (NMR) spectroscopy on minute quantities of target analyte isolated from marine sediment, allowed us to identify one major compound as a monohydroxy-GDGT with acyclic biphytanyl moieties (OH-GDGT-0). NMR spectroscopic and mass spectrometric data indicate the presence of a tertiary hydroxyl group

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37

Mahmoud Daoud, Araaf. "Synthesis, characterization and evaluation biological activity of new Schiff base compounds and their complexes with some transition elements." University of Thi-Qar Journal of Science 6, no. 2 (2017): 81–90. http://dx.doi.org/10.32792/utq/utjsci/v6i2.7.

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The novel Schiff base ligand L1 (Z)-N'-(2-hydroxy-3-methoxybenzylidene)isonicotinohydrazide and L2 (Z)-N'-(2-hydroxy-3-methoxybenzylidene)nicotinohydrazide obtained by the condensation of isonicotinic hydrazide and benzahydrazide with o-Vanilin (2-hydroxy-3-methoxybenzaldehyde) and its Co(II), Ni(II) and Cd(II) complexes were synthesized and characterized by elemental analysis and various physico-chemical techniques like, FT-IR, 1H-NMR, Electrospray Ionisation mass(ESI-MS), UV-visible and molar conductance. The ligand involving oxygen atom of amide carbonyl, azomethine nitrogen and oxygen of h

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38

Gimadieva, Alfiya Raisovna, Yuliya Zulkifovna Khazimullina, Aigiza Aidarovna Gilimkhanova, and Akhat Gaziz:anovich Mustafin. "Efficient modification of peroxydisulfate oxidation reactions of nitrogen-containing heterocycles 6-methyluracil and pyridine." Beilstein Journal of Organic Chemistry 20 (October 16, 2024): 2599–607. http://dx.doi.org/10.3762/bjoc.20.219.

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Nitrogen-containing heterocyclic compounds are widely used in pharmacology due to their pronounced biological activities and low toxicities. The introduction of a hydroxy function into uracil and pyridine molecules has led to compounds with antioxidant, anti-inflammatory, and immunomodulatory activity (3-hydroxy-6-methyl-2-ethylpyridine, 5-hydroxy-6-methyluracil, etc.). One of the successful methods for hydroxylation is peroxydisulfate oxidation. By modifying the Elbs reaction through catalysis and the introduction of additional oxidants, we have been able to significantly increase the yields

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39

Commeiras, Laurent, Muhammad Idham Darussalam Mardjan та Jean-Luc Parrain. "Strategies To Access γ-Hydroxy-γ-butyrolactams". Synthesis 50, № 06 (2018): 1175–98. http://dx.doi.org/10.1055/s-0036-1591886.

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α,β-Unsaturated γ-hydroxy-γ-butyrolactams are of a great interest due to their presence in designed pharmaceutical molecules and numerous natural products displaying a broad spectrum of biological activities. In addition, these five-membered heterocyclic compounds are also relevant and versatile building blocks in organic synthesis. In this context, strategies for the construction of these scaffolds has triggered considerable attention and this review highlights the progress in the formation of α,β-unsaturated γ-hydroxy-γ-butyrolactams (5-hydroxy-1,5-dihydro-2H-pyrrol-2-ones).1 Introduction2 I

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40

Holeček, Jaroslav, Milan Nádvorník, Karel Handlíř, Vladimír Pejchal, Radovan Vítek, and Antonín Lyčka. "Synthesis and Infrared and 1H, 13C, 119Sn NMR Spectra of Some Tris- and Bis(1-butyl)tin(IV) Naphthoates and Hydroxynaphthoates." Collection of Czechoslovak Chemical Communications 62, no. 2 (1997): 279–98. http://dx.doi.org/10.1135/cccc19970279.

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The synthesis and structure of tris(1-butyl)tin(IV) and bis(1-butyl)tin(IV) 1-naphthoates, 2-naphthoates, 1-hydroxy-2-naphthoates, 2-hydroxy-1-naphthoates, 3-hydroxy-2-naphthoates as well as the groups of the corresponding tetrakis(1-butyl)dinaphthoato- and tetrakis(1-butyl)bis(hydroxynaphthoato)distannoxanes have been studied in solutions of both coordinating and noncoordinating solvents by means of infrared and multinuclear (1H, 13C and 119Sn) NMR spectroscopies. In the solutions of noncoordinating solvents, all the tris(1-butyl)tin(IV) compounds are present as isolated monomeric molecules w

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41

P., N. GUPTA, and RAINA ANJU. "Polarographic Behaviour of Some Azo Compounds." Journal of Indian Chemical Society Vol. 62, May 1985 (1985): 363–66. https://doi.org/10.5281/zenodo.6302842.

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Department of Chemistry, University of Kashmir, Srinagar-190 006 <em>Manuscript received 5 November 1984, accepted 30 April 1985</em> Polarographic reduction mechanism of azo compounds in various buffers with <em>p</em>H ranging between 2 and 12 and at constant temperature of 25° was studied. In most cases, two E<sub>1/2<sup>- </sup></sub><em>p</em>H relationships were evaluated. The diffusion controlled reduction behaviour was observed. In acid and alkaline ranges the products of reaction were not identical. The proposed reaction mechanism highlights the product formation with t

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42

Hong, Si Won, Koji Hasegawa, and Hideyuki Shigemori. "Plant Growth Regulating Activity of Three Polyacetylenes from Helianthus Annuus L." Natural Product Communications 4, no. 1 (2009): 1934578X0900400. http://dx.doi.org/10.1177/1934578x0900400110.

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Three polyacetylenes, 8-(β-D-glucopyranosyloxy)-3-hydroxy-1,9, 14-pentadecatriene-4,6-diyne, termed “helian”(1), 8-acetoxy-3-hydroxy-1,9, 14-pentadecatriene-4,6-diyne (2), and 3,8-dihydroxy-1,9, 14-pentadecatriene-4,6-diyne (3) were isolated from seedlings of sunflower, Helianthus annuus L. cv Russia. Compounds 1 and 2, having a β-glucose and an acetoxy group at C-8, respectively, showed a weak effect on the growth of roots and shoots of rice ( Oryza sativa L.) and cress ( Lepidium sativum L.), while compound 3, having a free hydroxyl group at C-8, exhibited a growth promoting effect on the ro

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Kottapalle, Gajanan D., Nagesh J. Deshmukh, and Avinash T. Shinde. "Growth Inhibitory Properties of Synthetic Chalcones." Current Bioactive Compounds 16, no. 6 (2020): 892–99. http://dx.doi.org/10.2174/1573407215666190401202553.

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Background: In the present study, chalcones were synthesized from 2-hydroxy-1- acetonaphthone and substituted aromatic aldehydes were synthesized by Claisen Schmidt condensation reaction using potassium hydroxide as a base. The synthesized chalcones were purified by recrystallization from ethanol and evaluated for antibacterial activity by well diffusion method. The antibacterial activity was evaluated against Bacillus licheniformis, Bacillus species, Escherichia coli and Staphylococcus aureus using Ciprofloxacin as a standard. Methods: The target molecules were prepared by reacting 2-hydroxy-

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44

Ismiyarto, Ismiyarto, Suyanti Suyanti, Ngadiwiyana Ngadiwiyana, Purbowatiningrum Ria Sarjono, and Nor Basid Adiwibawa Prasetya. "Synthesis of 4-Hydroxy-2-Methylchalcone from meta-Cresol Formilation Product and Its Activities as an Antibacteria." Jurnal Kimia Sains dan Aplikasi 21, no. 4 (2018): 193–97. http://dx.doi.org/10.14710/jksa.21.4.193-197.

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Research on the synthesis of 4-hydroxy-2-methylchalcone from 4-hidroksi-2-metilbenzaldehida as formilated meta-cresol product and its antibacterial activity test has been conducted. As the first step, synthesis of 4-hydroxy-2-methylbenzaldehyde was carried out by treatment meta-cresol with chloroform through the Reimer-Tiemann formylation. Product is a brown solid with 23.94% yields. Furthermore, the 4-hydroxy-2-methylchalcone was synthesized using the 4-hydroxy-2-methylbenzaldehyde and acetophenone through the Claisen-Schmidt reaction. The product is a brownish yellow solid with 29.74% yields

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45

Rádl, Stanislav, and Viktor Zikán. "Synthesis and biological activity of some basic-substituted 4,9-dihydro-3-methyl-4-oxo-1H(2H)-pyrazolo[3,4-b]quinolines." Collection of Czechoslovak Chemical Communications 53, no. 8 (1988): 1812–19. http://dx.doi.org/10.1135/cccc19881812.

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Compounds Ia, Ib were obtained by an alkylation of 4,9-dihydro-6-hydroxy-1,3,9-trimethyl-4-oxo-1H-pyrazolo[3,4-b]quinoline (VIIb) with the respective dialkylaminoalkyl chloride. The same alkylation of 4,9-dihydro-6-hydroxy-2,3,9-trimethyl-4-oxo-2H-pyrazolo[3,4-b]quinoline (VIIIb) yielded compounds IIa and IIb. Similar alkylation of 4,9-dihydro-6-hydroxy-3,9-dimethyl-4-oxo-1H-pyrazolo[3,4-b]quinoline (IXa) and its 6-methoxy derivative (IXb) afforded IIIa-IIId. Compound IV was prepared from 4-chloro-3-methyl-1H-pyrazolo[3,4-b]quinoline (Xa) via its 1-(3-dimethylaminopropyl)derivative (Xb). Compo

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46

V, Mujalda, S. Tiwari, V. Sharma, P. Saxena, and M. Shrivastava. "Synthesis of 3-chloro-4- (2-hydroxy-5-(substituted phenyl (diazyl)-N-[(4-oxo-2-phenylquinazoline 3(4H)-yl)]-2-oxoazetidine-1-carbothiamide Analogs as Potential Antimicrobial Agents." International Journal of Drug Design and Discovery 3, no. 2 (2025): 798–802. https://doi.org/10.37285/ijddd.3.2.8.

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Some new series of 3-chloro-4-(2-hydroxy-5-(substituted phenyl (diazyl)-N-[(4-oxo -2-phenylquinazoline 3(4H)-yl)]-2-oxoazetidine-1-carbothiamide have been synthesized by the reaction of 1-[2-hydroxyl–5–(substituted phenyl)diazyl benzylidene-3-(4-oxo-2-phenylquinazolin-3(4H)-yl) thiourea with chloroacetyl chloride and triethyl amine in 1,4 dioxane. The structure of synthesized compounds is confirmed by IR, NMR & Mass spectral studies. The antimicrobial activities of the synthesized compounds were evaluated by screening on different human pathogens using the disc diffusion assay.

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Camarasa, María-José, Alberto Diez-Torrubia, Silvia Cabrera, et al. "Tripartate Prodrugs of Hydroxy-containing Compounds." Antiviral Research 90, no. 2 (2011): A68—A69. http://dx.doi.org/10.1016/j.antiviral.2011.03.141.

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48

Tsuge, Akihiko, Koichi Tanaka, Shuji Sonda, Shuntaro Mataka, and Masashi Tashiro. "Partially hydroxy depleted calixarene-like compounds." Journal of the Chemical Society, Chemical Communications, no. 19 (1991): 1329. http://dx.doi.org/10.1039/c39910001329.

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Thejeel, Entedhar, and Athraa Hameed Mekky. "Synthesis, Absorption, Distribution, Metabolism, Excretion, Toxicology (ADMET) and molecular docking studies of some pyridin-2(1H)-one derived from a Apocynin in Thi-Qar Governorate." University of Thi-Qar Journal of Science 10, no. 2 (2023): 73–80. http://dx.doi.org/10.32792/utq/utjsci/v10i2.1089.

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The present study includes synthesized of some pyridin-2(1H)- one of 1-(4-hydroxy-3-methoxyphenyl) ethan-1-one. The [ 6-(4-hydroxy-3-methoxyphenyl) - 4 - (4-methoxyphenyl) - 2 - oxo-1,2-dihydropyridine - 3- carbonitrile, 4 - (4-bromophenyl) - 6 -(4-hydroxy-3-methoxyphenyl)-2-oxo-1,2- dihydropyridine - 3- carbonitrile, 4 - (4-bromophenyl) – 6 - (4-hydroxy-3-methoxyphenyl)-2-oxo-1, 2 - dihydropyridine - 3-carbonitrile] derivatives have been synthesized by cyclization reaction of the 1-(4-hydroxy-3-methoxyphenyl)ethan-1-one with various aldehydes (4-methoxy benzaldehyde, 4-bromo benzaldehyde ,4-d

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50

Saima Khan, Saima Khan, Muhammad Imran Tousif Muhammad Imran Tousif, Naheed Raiz Naheed Raiz, et al. "Rarely Occurring Natural Products Isolated from Vincetoxicum stocksii." Journal of the chemical society of pakistan 41, no. 4 (2019): 695. http://dx.doi.org/10.52568/000781/jcsp/41.04.2019.

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Silica gel column chromatography of the ethyl acetate fraction of methanol extract of Vincetoxicum stocksii resulted in the separation of three new rarely occurring natural products; [4-(4-(methoxycarbonyl)benzyl)phenyl] carbamic acid (1), bis[di-p-phenylmethane]ethyl carbamate (2), methyl 2-hydroxy-3-(2-hydroxy-5-(3-methylbut-2-enyl)phenyl)-2-(4-hydroxyphenyl) propanoate, stocksiloate(3), along with five known compounds; 1-(4-hydroxy-3-methoxyphenyl)-1,2,3,-propanetriol (4), feruloyl-6-O-β-D-glucopyranoside (5), 4-hydroxy-3,5-dimethoxybenzoic acid (6), apocynin (7) and vincetomine (8). The st

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