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Journal articles on the topic '4-hydroxycoumarin'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Bhuyan, Pulak, Sinki Kolita, Leema Dutta, and Pankaj Das. "One-Pot Synthesis of Unsymmetrical Bis(4-Hydroxycoumarin-3-yl)methanes." Synlett 28, no. 17 (2017): 2291–94. http://dx.doi.org/10.1055/s-0036-1589065.

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Unsymmetrical bis(4-hydroxycoumarin-3-yl)methane derivatives have been synthesized from 4-hydroxycoumarins, aldehydes, and secondary amines via 3-(aminoalkyl)-4-hydroxycoumarin intermediates, followed by substitution.

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2

ALOK, KUMAR MITRA, DE APARNA, KARCHAUDHURI NILAY, KUMAR MISRA SWAPAN, and KUMAR MUKHOPADHYAY APURBA. "Synthesis of Coumarins in Search of Better Nonpeptidic HIV Protease Inhibitors." Journal of Indian Chemical Society Vol. 75, Oct-Dec 1998 (1998): 666–71. https://doi.org/10.5281/zenodo.5916038.

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Department of Chemistry, University of Calcutta, 92, Acharya Prafulla Chandra Road, Calcutta-700 009 <em>Manuscript received 7 August 1998</em> 3-Substituted-4-hydroxycoumarins have been recently identified as active nonpeptidic HIV protease inhibitors. In order to get more potent inhibitors, synthesis of a number of 3-substituted-4-hydroxycoumarins have been designed. Nucleophilicity of C-3 in 4- hydroxycoum arin is exploited by reacting with an electrophile 3-carbethoxycoumarin to achieve a new C-3 substituted-4-hydroxycoumarin. But the product identified is a benzopyranodicoumarin (2), whic

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3

Traven, Valery F., Larisa I. Vorobjeva, Tatjana A. Chibisova, Edward Andrew Carberry, and Noelle Jean Beyer. "Electronic absorption spectra and structure of hydroxycoumarin derivatives and their ionized forms." Canadian Journal of Chemistry 75, no. 4 (1997): 365–76. http://dx.doi.org/10.1139/v97-042.

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Electronic absorption spectra of 18 hydroxycoumarin derivatives and their ionized forms have been studied. Close agreement between experimental and the PPP CI calculated electron absorption band energies has been found in most cases. Strong polarization of the carbonyl function of the pyrone ring in the 7-hydroxycoumarin derivatives, H-bonding between the hydroxyl group and neighboring substituent in the ortho-substituted hydroxycoumarins, as well as their tautomeric transformations, have been suggested in the discussion of the electronic absorption spectra of the hydroxycoumarin derivatives.

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4

Anary-Abbasinejad, Mohammad, Hossein Anaraki-Ardakani, Azimeh Saidipoor, and Mahmood Shojaee. "Synthesis of 3-[(acetylamino)(aryl)methyl]-4-Hydroxycoumarins." Journal of Chemical Research 2007, no. 9 (2007): 535–37. http://dx.doi.org/10.3184/030823407x247785.

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One-pot, three-component reaction between aryl aldehydes, 4-hydroxycoumarin, and acetonitrile in the presence of chlorosulfonic acid affords 3-[(acetylamino)(aryl)methyl]-4-hydroxycoumarins in excellent yields.

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5

Wu, Nan, Xinnian Li, Xin Xu, and Daqing Shi. "Synthesis of 3,3′-arylmethylidenebis-4-hydroxycoumarin derivatives catalysed by KF-montmorillonite." Journal of Chemical Research 2007, no. 10 (2007): 561–62. http://dx.doi.org/10.3184/030823407x255551a.

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3,3′-Arylmethylidenebis-4-hydroxycoumarins derivatives have been synthesised in good yields by the Michael addition reaction of aromatic aldehydes with 4-hydroxycoumarin in DMF catalysed by KF-montmorillonite.

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6

Anary-Abbasinejad, Mohammad, Khadijeh Charkhati, and Alireza Hassanabadi. "Stereoselective synthesis of 3-[2-(dialkoxyphosphoryl)-1,2-dialkoxycarbonyl-ethyl]-4-hydroxycoumarins by reaction between trialkyl phosphites, dialkyl acetylenedicarboxylates and 4-hydroxycoumarin." Journal of Chemical Research 2009, no. 5 (2009): 319–21. http://dx.doi.org/10.3184/030823409x450435.

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A three-component reaction between trialkyl phosphites, dialkyl acetylenedicarboxylates and 4-hydroxycoumarin is described as a simple and efficient route for the synthesis of 3-[2-(dialkoxyphosphoryl)-1,2-dialkoxycarbonyl-ethyl]-4-hydroxycoumarins in high yields.

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7

K., N. Trivedi, S. Madhava Rao S., V. Mistry S., and M. Desai S. "Chemistry of 4-hydroxycoumarin." Journal of Indian Chemistry Society Vol. 78, October-December 200 I (2001): 579–95. https://doi.org/10.5281/zenodo.5891969.

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Department of Chemistry, Faculty of Science, M.S. University of Baroda, Vadodara-390 002, India <em>E-mail</em>: samir2sam@yahoo.com <em>Manuscript received 22 December 2000</em> 4-Hydroxycoumarin, a highly reactive compound, is reviewed with respect to its synthesis, tautomerism, reactions and structure-activity relationship of its derivatives for anticoagulant property.

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8

K., N. Trivedi, S. Madhava Rao S., V. Mistry S., and M. Desai S. "Chemistry of 4-hydroxycoumarin." Journal of Indian Chemical Society Vol. 78, Oct-Dec 2001 (2001): 579–95. https://doi.org/10.5281/zenodo.5910204.

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Department of Chemistry, Faculty of Science, M.S. University of Baroda, Vadodara-390 002, India E-mail: samir2sam@yahoo.com <em>Manuscript received 22 December 2000</em> 4-Hydroxycoumarin, a highly reactive compound, is reviewed with respect to its synthesis, tautomerism, reactions and structure-activity relationship of its derivatives for anticoagulant property.

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9

Chatterjee, Rana, Sougata Santra, Grigory Zyryanov, and Adinath Majee. "Vinylation of Carbonyl Oxygen in 4-Hydroxycoumarin: Synthesis of Heteroarylated Vinyl Ethers." Synthesis 51, no. 11 (2019): 2371–78. http://dx.doi.org/10.1055/s-0037-1610696.

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The unique nucleophilic character of the carbonyl oxygen of 4-hydroxy coumarin has been observed by the BF3·OEt2 catalyzed reaction of 4-hydroxycoumarin and alkynes. The reactions of 4-hydroxycoumarin and substituted 4-hydroxycoumarin with various terminal alkynes have been studied. In case of internal alkyne (prop-1-yn-1-ylbenzene), the reaction with 4-hydroxycoumarin led to the corresponding product with an E/Z ratio of 3:1. This protocol is operationally very simple and has much potential for the synthesis of heteroarylated vinyl ethers from basic chemicals.

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10

Rashid, Mohammad A., James A. Armstrong, Alexander I. Gray, and Peter G. Waterman. "Novel C-Geranyl 7-Hydroxycoumarins from the Aerial Parts of Eriostemon tomentellus." Zeitschrift für Naturforschung B 47, no. 2 (1992): 284–87. http://dx.doi.org/10.1515/znb-1992-0221.

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From the aerial parts of Eriostemon tomentellus five coumarins have been isolated. These have been characterized as ostruthin (6-geranyl-7-hydroxycoumarin (1)) and the novel compounds, 8-geranyl-7-hydroxycoumarin (2), (E)-6-(7-hydroxy-3,7-dimethylocta-2,5-dienyl)- 7-hydroxycoumarin (3), (E)-6-(7-hydroperoxy-3,7-dimethylocta-2,5-dienyl)-7-hydroxycoumarin (4), and 6-(6-hydroxy-3,7-dimethylocta-2,7-dienyl)-7-hydroxycoumarin (5). In addition tembamide (2-{4-methoxyphenyl}-2-hydroxy-N-benzoylethylamine (6 ) was isolated and the l3C NMR spectrum reported for the first time.

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11

Yoon, Jeong A., and Young Taek Han. "Efficient Synthesis of Pyrido[3,2-c]coumarins via Silver Nitrate Catalyzed Cycloisomerization and Application to the First Synthesis of Polyneomarline C." Synthesis 51, no. 24 (2019): 4611–18. http://dx.doi.org/10.1055/s-0037-1610730.

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Herein, we report an efficient method for the synthesis of the pyrido[3,2-c]coumarin scaffold, one of the privileged heterocycle-fused coumarin scaffolds, via a AgNO3-catalyzed cycloisomerization of 4-(propynylamino)coumarins obtained from diverse 4-hydroxycoumarins. This concise method affords pyrido[3,2-c]coumarin analogues bearing diverse substituents on the benzene or pyridine ring in moderate to good yields. Moreover, this methodology was extended to the facile synthesis of polyneomarline C, a natural pyrido[3,2-c]coumarin derivative isolated from the Chinese herbal medicine Polyalthia ne

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12

BANI, TALAPATRA, Kumar Mandal Sudipta, Biswas Kallolmay, Chakrabarti Ramaprasad та K. Talapatra Sunil. "Reactions of 4-hydroxycoumarin with some α,β-unsaturated carbonyls and 1,3-dicarbonyls : trapping of 4-hydroxycoumarin tautomers; formation of a pimelic acid derivative and a novel bicyclo compound". Journal of Indian Chemical Society Vol. 78, Oct-Dec 2001 (2001): 765–71. https://doi.org/10.5281/zenodo.5910727.

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Centre of Advanced Studies on Natural Products, Department of Chemistry, University of Calcutta, University College of Science, 92, Acharya Praful la Chandra Road, Kolkata-700 009, India <em>E-mail</em> : talapatrask@yahoo.com <em>Manuscript received 31 August 2001</em> 4-Hydroxycoumarin (1) being endowed with both nucleophilic and electrophilic properties furnishes the dimeric coumarin derivative 3 in a pyridine catalyzed self-condensation process; while its attempted morpholine catalyzed self-condensation yields no dimeric coumarin derivative, but leads to the formation of the enamine deriva

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13

Au, Nicholas, and Allan E. Rettie. "Pharmacogenomics of 4-Hydroxycoumarin Anticoagulants." Drug Metabolism Reviews 40, no. 2 (2008): 355–75. http://dx.doi.org/10.1080/03602530801952187.

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14

Bedair, A. H., Nagwa A. El-Hady, M. S. Abd El-Latif, A. H. Fakery, and A. M. El-Agrody. "4-Hydroxycoumarin in heterocyclic synthesis." Il Farmaco 55, no. 11-12 (2000): 708–14. http://dx.doi.org/10.1016/s0014-827x(00)00097-5.

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15

Bani, Talapatra, Kumar Mandal Sudipta, Biswas Kallolmay, Chakrabarti Ramaprasad, and K. Talapatra Sunil. "Reactions of 4-hydroxycoumarin with some a,J3-unsaturated carbonyls and 1,3-dicarbonyls: trapping of 4-hydroxycoumarin tautomers; formation of a pimelic acid derivative and a novel bicyclo compound." Journal of Indian Chemistry Society Vol. 78, October-December 2001 (2001): 765–71. https://doi.org/10.5281/zenodo.5901961.

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Centre of Advanced Studies on Natural Products, Department of Chemistry, University of Calcutta, University College of Science, 92, Acharya Prafulla Chandra Road, Kolkata-700 009, India <em>E-mail </em>: talapatrask@yahoo.com <em>Manuscript received 31 August 2001</em> 4-Hydroxycoumarin (1) being endowed with both nucleophilic and electrophilic properties furnishes the dimeric coumarin derivative 3 in a pyridine catalyzed self-condensation process; while its attempted morpholine catalyzed self-condensation yields no dimeric coumarin derivative, but leads to the formation of the enamine derivat

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16

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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17

Ristić, Milenko, Biljana Dekić, Niko Radulović, and Marija Aksić. "Synthesis, complete assignment of 1H- and 13C-NMR spectra and antioxidant activity of new azine derivative bearing coumarin moiety." Bulletin of Natural Sciences Research 11, no. 1 (2021): 9–16. http://dx.doi.org/10.5937/bnsr11-31265.

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In this research, the synthesis of a new azine derivative with coumarin moiety was performed in three reaction steps, starting from 4-hydroxycoumarin. The first step in synthesis was the acetylation of 4-hydroxycoumarin to yield 3-acetyl-4-hydroxycoumarin and then the obtained 3-acetyl-4-hydroxycoumarin was reacted with hydrazine hydrate and give a corresponding hydrazone. Condensation of the hydrazone with 4-ethoxy-3methoxybenzaldehyde afforded the target compound 1-[1-(4-hydroxy-2-oxo-2H-chromen-3-yl)-ethylidene]-2-(4etoxy-3-methoxybenzylidene)-hydrazine in a good yield. The resulting azine

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18

Manolov, Ilia, Caecilia Maichle-Moessmer, and Elke Niquet. "Synthesis and Structure of 1-Substituted Benzopyrano- [4’,3’-c]benzo[3”,4”-ƒ]-2,8-dioxabicyclo[3.3.1]nonane." Zeitschrift für Naturforschung B 61, no. 2 (2006): 207–12. http://dx.doi.org/10.1515/znb-2006-0216.

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AbstractThe base catalyzed condensation reaction between 4-hydroxycoumarin and 3-acetylcoumarin (3-benzoylcoumarin) in water at reflux led to the formation of 1-methyl (1-phenyl)- benzopyrano[4’,3’-c]-benzo[3”,4”-ƒ ]-2,8-dioxabicyclo[3.3.1]nonane (2a, b) as final products. When 4-hydroxycoumarin and 3-acetylcoumarin reacted in a glacial acetic acid in the presence of potassium acetate the final product was 7-[3-acetyl-2-oxo-3,4-dihydro-2H-[1]benzopyran-4-yl]methyl- 6H,14H,14bH-bis-([1]benzopyrano)[4,3-b:4’,3’-d]pyran-6,14-dione (4). 4-Hydroxycoumarin and 4-(5-bromo-2-hydroxyphenyl)-3-buten-2-o

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19

Ozheredov, D. S., and P. A. Karpov. "Comparative analysis of allosteric rearrangements in FtsZ protein structure induced by benzamide and 4-hydroxycoumarine compounds." Faktori eksperimental'noi evolucii organizmiv 35 (September 25, 2024): 164–69. http://dx.doi.org/10.7124/feeo.v35.1679.

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Aim. To reveal allosteric rearrangements of FtsZ molecules arising under the influence of benzamide compounds and 4-hydroxycoumarin derivatives. To discover the key molecular mechanisms predetermining the effect of the specified compounds on the cell division in bacteria. Methods. Comparative analysis of FtsZ protein structures and their complexes with ligands. Application of structural bioinformatics software for molecular visualization, measurement of interatomic distances and approximation of intramolecular shifts based on RMSD indicators. Results. Revealed conformational changes in FtsZ pr

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20

Hroboňová, Katarína, Jana Sádecká, and Jozef Čižmárik. "HPLC separation and determination of dicoumarol and other simple coumarins in sweet clover." Nova Biotechnologica et Chimica 17, no. 1 (2018): 95–102. http://dx.doi.org/10.2478/nbec-2018-0010.

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AbstractDicoumarol is a mycotoxin, that acts as a blood anticoagulant, is formed during the microbial action of molds and fungi in spoiled hay or silage containing high-coumarin plant. A HPLC-DAD method for determination of coumarins, including dicoumarol, coumarin, and 4-hydroxycoumarin was developed. Methanol and acetic acid were used as mobile phase with gradient elution. The simultaneous separation was performed using C18 type of stationary phase. The recoveries were 88.6 – 92.6 %, 91.8 – 95.0 %, and 89.7 – 94.1 % (evaluated for three concentration levels) for dicoumarol, coumarin, and 4-h

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21

Ganina, O. G., I. S. Veselov, G. V. Grishina, A. Yu Fedorov, and I. P. Beletskaya. "Synthesis of 4-aminopolymethoxycoumarins from 4-hydroxycoumarin triflates." Russian Chemical Bulletin 55, no. 9 (2006): 1642–47. http://dx.doi.org/10.1007/s11172-006-0467-9.

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22

Liu, Benye, Torben Raeth, Till Beuerle, and Ludger Beerhues. "A novel 4-hydroxycoumarin biosynthetic pathway." Plant Molecular Biology 72, no. 1-2 (2009): 17–25. http://dx.doi.org/10.1007/s11103-009-9548-0.

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23

Završnik, Davorka, Samija Muratović, Selma Špirtović, Dženita Softić, and Marica Medić-Šarić. "The Synthesis and Antimicrobial Activity of Some 4-Hydroxycoumarin Derivatives." Bosnian Journal of Basic Medical Sciences 8, no. 3 (2008): 277–81. http://dx.doi.org/10.17305/bjbms.2008.2933.

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Due to exceptional reactivity of 4-hydroxycoumarin, the synthesis of new coumarin derivatives of dimer and tetramer type has been carried out. The synthesis was carried out from 4-hydroxycoumarin and various aromatic aldehydes. In this way, compounds of the dimer 3,3’-(benzilidene)bis (4-hydroxycoumarin) type, as well as of the tetramer 3,3,’3’,’3’’’-(1,4-dim- ethylenphenyl)tetra (4-hydroxycoumarin) type were prepared.The newly synthesized derivatives contain different functional groups, and as such they could exhibit microbiological activity. Therefore, we tested the microbiological activity

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24

Dimić, Dušan S., Goran N. Kaluđerović, Edina H. Avdović, et al. "Synthesis, Crystallographic, Quantum Chemical, Antitumor, and Molecular Docking/Dynamic Studies of 4-Hydroxycoumarin-Neurotransmitter Derivatives." International Journal of Molecular Sciences 23, no. 2 (2022): 1001. http://dx.doi.org/10.3390/ijms23021001.

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In this contribution, four new compounds synthesized from 4-hydroxycoumarin and tyramine/octopamine/norepinephrine/3-methoxytyramine are characterized spectroscopically (IR and NMR), chromatographically (UHPLC-DAD), and structurally at the B3LYP/6-311++G*(d,p) level of theory. The crystal structure of the 4-hydroxycoumarin-octopamine derivative was solved and used as a starting geometry for structural optimization. Along with the previously obtained 4-hydroxycoumarin-dopamine derivative, the intramolecular interactions governing the stability of these compounds were quantified by NBO and QTAIM

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25

Zhang, Sheng-Ling, Zhi-Shu Huang, Lin-Kun An, et al. "Synthesis of Zwitterionic 4-Hydroxycoumarin Derivatives through a Unique Reaction of 4-Hydroxycoumarins withp- Benzoquinone and Pyridine." Organic Letters 6, no. 26 (2004): 4853–55. http://dx.doi.org/10.1021/ol048109p.

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26

MUJEEB-UR-RAHMAN, MUJEEB-UR-RAHMAN, K. Z. KHAN, Z. S. SIDDIQI, and A. ZAMAN. "ChemInform Abstract: A Convenient Route for 3-Formyl-4-hydroxycoumarin and Reactions of 3- Bromo-4-hydroxycoumarin." ChemInform 22, no. 3 (2010): no. http://dx.doi.org/10.1002/chin.199103184.

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27

Jovanović, Aleksandra, Edina Avdović, Ana Plećić, Vojislav Ćirić, Branko Bugarski, and Zoran Marković. "Liposomes as a carrier for 4–hydroxycoumarin: characterisation, stability and antioxidant potential." Lekovite sirovine 43, no. 1 (2023): 1–6. http://dx.doi.org/10.61652/leksir2343e128j.

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&lt;p&gt;The aims of the present research were to develop and characterize 4-hydroxycoumarin-loaded liposomes &lt;em&gt;via &lt;/em&gt;the determination of encapsulation efficiency, antioxidant capacity, vesicle size, polydispersity index (PDI), zeta potential, conductivity, mobility, density, surface tension, viscosity, and 60-day storage stability. The encapsulation efficiency of 4-hydroxycoumarin in liposomal particles was 96.7 &amp;plusmn; 1.2%. The ABTS and DPPH radical scavenging capacity of the prepared liposomes was 89.76 &amp;plusmn; 0.56% and 93.18 &am

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28

Vishvanath, D. Patil, P. Patil Ketan, R. Sutar Nagesh, and V. Gidh Prathamesh. "Efficient synthesis of biscoumarins using zinc acetate as a catalyst in aqueous media." Chemistry International 3, no. 3 (2017): 240–43. https://doi.org/10.5281/zenodo.1473124.

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Bis-(4-hydroxycoumarin)methanes derivatives (1-9) were synthesized via one pot condensation reaction of various aromatic aldehyde and 4-hydroxycoumarin using zinc acetate as a catalyst in presence of water as a solvent. This mediated reaction of various aromatic and hetero-aromatic aldehydes using catalytic amounts of zinc acetate avoids the use of expensive, corrosive reagents, toxic solvents and provides operational simplicity.

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29

Shoshin, Daniil E., Ksenia N. Atlanderova, Galimzhan K. Duskaev, and Elena A. Sizova. "SMALL MOLECULES IN BACTERIAL LUMINESCENCE INHIBITION TEST." Siberian Journal of Life Sciences and Agriculture 15, no. 4 (2023): 29–55. http://dx.doi.org/10.12731/2658-6649-2023-15-4-29-55.

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Background. The rejection of antibiotics in animal husbandry encourages the search for new more effective alternatives, one of which is phytochemicals – small molecules with pronounced bioactive effect. Materials and methods. The article discusses the physiological properties of quercetin, 7-hydroxycoumarin, vanillin, trans-cinnamon aldehyde, as active substances from extracts of some plants. Their biological certification was carried out in the bacterial luminescence inhibition test using a recombinant strain of Escherichia coli K12 TG1 in comparison with the antibiotic drug tetracyclin

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30

Ghouili, Afef, Jan Rohlicek, Taïcir Ben Ayed, and Rached Ben Hassen. "Crystal structure determination from powder diffraction data of the coumarin vanillin chalcone." Powder Diffraction 29, no. 4 (2014): 361–65. http://dx.doi.org/10.1017/s0885715614000669.

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4-hydroxy-3-methoxyphenyl-4-hydroxycoumarin chalcone (C19H14O6) was synthesized by the Claisen–Schmidt reaction with the condensation of 3-acetyl-4-hydroxycoumarin with 4-hydroxy-3-methoxybenzaldehyde (vanillin). The new compound was characterized by Fourier transform infrared microscopy, UV–vis 1H, and 13C NMR spectroscopy and its crystal structure was ab initio determined from laboratory X-ray powder diffraction data. The crystal structure is monoclinic with unit-cell parameters a = 14.3181(4), b = 8.040 71(9), c = 13.5524(3), β = 100.3559(13)°, V = 1534.84(6) Å3, and space group P21/c.

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31

Brahmbhatt, D. I., and B. R. Hirani. "Synthesis and Characterization of Coumarin–Trioxane–Urea Copolymers." High Performance Polymers 8, no. 2 (1996): 295–300. http://dx.doi.org/10.1088/0954-0083/8/2/010.

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4-methyl-7-hydroxycoumarin trioxane urea (MHCTU) copolymers were prepared by copolycondensation of 4-methyl-7 hydroxycoumarin (MHC), trioxane (T) and urea (U) in the presence of 2 M HCl/H2SO4 as a catalyst with different molar ratios of reacting monomers. The copolymers were characterized by elemental analysis, IR spectral and TGA studies. The number average molecular weight ( Mn) of all the produced copolymers was determined by non-aqueous titrimetry.

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32

Fort, Douglas J., Enos L. Stover, Timothy Propst, Mendi A. Hull, and John A. Bantle. "Evaluation of the Developmental Toxicities of Coumarin, 4-Hydroxycoumarin, and 7-Hydroxycoumarin Using Fetax." Drug and Chemical Toxicology 21, no. 1 (1998): 15–26. http://dx.doi.org/10.3109/01480549809017847.

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33

NAVEEN, S., Priti ADLAKHA, Kuldip UPADHYAY, Anamik SHAH, Sridhar M. ANANDALWAR, and J. Shashidhara PRASAD. "Crystal Structure of 3-Nitro-4-hydroxycoumarin." Analytical Sciences: X-ray Structure Analysis Online 22 (2006): x103—x104. http://dx.doi.org/10.2116/analscix.22.x103.

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34

Thijssen, H. H. W., K. Hamulyák, and H. Willigers. "4-Hydroxycoumarin Oral Anticoagulants : Pharmacokinetics-Response Relationship." Thrombosis and Haemostasis 60, no. 01 (1988): 035–38. http://dx.doi.org/10.1055/s-0038-1647630.

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SummaryThe blood coagulating factors II and VII and prothrombin times (Thrombotest) were followed during a dosage interval (= 24 h) in patients on acenocoumarol (n = 6) and on phenprocoumon (n = 6) therapy. The patients were on stable anti-coagulation (%TT: 7-13%) for at least 6 months. The study was performed to investigate the concentration-response relationship of the 4-hydroxycoumarin-type oral anticoagulants. The three parameters were stable during the 24-h interval for patients on phenprocoumon therapy. Patients on acenoumarol showed fluctuations in their factor VII levels; peak activiti

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35

Os’kina, I. A., A. Ya Tikhonov, I. Yu Bagryanskaya, Yu V. Gatilov, and O. S. Fedorova. "Reaction of 4-hydroxycoumarin with 2-acetyloxiranes." Russian Journal of Organic Chemistry 49, no. 10 (2013): 1497–501. http://dx.doi.org/10.1134/s1070428013100163.

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36

Ohta, Takafumi, Youichi Arai, and Shoji Takitani. "Fluorometric determination of nitrite with 4-hydroxycoumarin." Analytical Chemistry 58, no. 14 (1986): 3132–35. http://dx.doi.org/10.1021/ac00127a047.

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37

Bagherzade, Ghodsieh, Mehdi Mogharrabi, and Mohammad Ali Faramarzi. "Laccase-catalyzed synthesis of 4–hydroxycoumarin derivatives." Pure and Applied Chemical Sciences 1 (2013): 75–82. http://dx.doi.org/10.12988/pacs.2013.31018.

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38

NEMATOLLAHI, Davood, Ali HAMZEHLOEI, Mehdi HESARI, and Javad RAHIMI. "Electrooxidation of Iodide in the Presence of 4-Hydroxycoumarin: Application to a Simple Coulometric Titration of 4-Hydroxycoumarin." Analytical Sciences 19, no. 6 (2003): 937–39. http://dx.doi.org/10.2116/analsci.19.937.

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39

Shettar, Ramesh S., Nagaraj P. Shetti, and Sharanappa T. Nandibewoor. "Mechanistic Study on the Oxidation of 4-Hydroxycoumarin by Diperiodatonickelate(IV) in Aqueous Alkaline Medium." E-Journal of Chemistry 6, no. 3 (2009): 601–10. http://dx.doi.org/10.1155/2009/417947.

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The oxidation of 4-hydroxycoumarin (HDC) by diperiodato- nickelate(IV) (DPN) in aqueous alkaline medium at a constant ionic strength of 1.0 mol dm-3was studied spectrophotometrically at 298 K. The reaction between DPN and 4-hydroxycoumarin in alkaline medium exhibits 1:3 stoichiometry (HDC: DPN). The reaction is of first order in [DPN] and has less than unit order in [HDC] and fractional order in [alkali]. The oxidation reaction in alkaline medium has been shown to proceed via a DPN- 4-hydroxycoumarin complex, which decomposes slowly in a rate-determining step followed by other fast steps to g

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40

Anary-Abbasinejad, Mohammad, Hossein Anaraki-Ardakani, Ali Ezadi, and Alireza Hassanabadi. "Three-component reaction between Triphenylphosphine, Acetylenic Esters and 4-hydroxycoumarin, 4-(phenylamino)coumarin, 4-hydroxyquinolin-2(1H)-one or 4-hydroxy-1-methylquinolin-2(1H)-one." Journal of Chemical Research 2007, no. 10 (2007): 605–8. http://dx.doi.org/10.3184/030823407x256154.

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Three-component reaction between dialkyl acetylenedicarboxylates and triphenylphosphine in the presence of 4-hydroxycoumarin, 4-(phenylamino)coumarin, 4-hydroxyquinolin-2(1 H)-one or 4-hydroxy-1-methylquinolin-2(1 H)-one is described.

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41

Garro, Hugo A., Celina García, Víctor S. Martín, Carlos E. Tonn, and Carlos R. Pungitore. "Chemistry and Biological Activity of Coumarins at Molecular Level." Natural Product Communications 9, no. 8 (2014): 1934578X1400900. http://dx.doi.org/10.1177/1934578x1400900808.

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Synthetic coumarins were prepared in high yields using ionic liquids as an environmental friendly alternative. 3,4-Dimethyl-7-hydroxycoumarin (3ab) and 3-isopropyl-4-methyl-5,7-dihydroxycoumarin (3bc) showed interesting activity against Taq DNA polymerase with IC50 values of 115.7 μM and 82.2 μM, respectively. Also, 4-methyl-7-hydroxycoumarin (3aa) and 4-methyl-5,7-dihydroxycoumarin (3ba) exhibited inhibitory activity against MMLV-RT with IC50 values of 23.5 μM and 18.3 μM, respectively. These inhibitors could have importance as antiretroviral chemotherapeutic agents and also for the developme

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42

Stanchev, Stancho, Cäcilia Maichle-Mössmer, and Ilia Manolov. "Synthesis, Structure and Acid-Base Behaviour of Some 4-Hydroxycoumarin Derivatives." Zeitschrift für Naturforschung B 62, no. 5 (2007): 737–41. http://dx.doi.org/10.1515/znb-2007-0519.

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Abstract The compound 3,3′-[(4-hydroxy-3-methoxy-5-nitrophenyl)methylene]-bis(4-hydroxy-2H-1- benzopyran-2-one) (1) crystallizes in the monoclinic system, space group P21/n, with cell constants a = 16.859(4), b = 6.1624(15), c = 25.164(4) Å , β = 98.019(19)°. The two 4-hydroxycoumarin fragments are intramolecularly hydrogen-bonded between hydroxyl and carbonyl groups. The pH-dependent color changes of 4-hydroxycoumarin derivatives were studied by means of potentiometric and spectrophotometric titration. On the basis of the results obtained, the use of 3,3′-[(4-hydroxy-3- methoxy-5-nitrophenyl)

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43

Yakout, E. M. A., N. M. Ibrahim, Kh M. Ghoneim та M. R. H. Mahran. "Reactions of 4-Hydroxycoumarin and 4-Hydroxyfurocoumarins with α,β-Unsaturated Nitriles. Mass Spectrometry of the New γ-Pyrano-α-pyran Derivatives". Journal of Chemical Research 23, № 11 (1999): 652–53. http://dx.doi.org/10.1177/174751989902301108.

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44

Leven, Matthias, Jörg M. Neudörfl, and Bernd Goldfuss. "Metal-mediated aminocatalysis provides mild conditions: Enantioselective Michael addition mediated by primary amino catalysts and alkali-metal ions." Beilstein Journal of Organic Chemistry 9 (January 23, 2013): 155–65. http://dx.doi.org/10.3762/bjoc.9.18.

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Four catalysts based on new amides of chiral 1,2-diamines and 2-sulfobenzoic acid have been developed. The alkali-metal salts of these betaine-like amides are able to form imines with enones, which are activated by Lewis acid interaction for nucleophilic attack by 4-hydroxycoumarin. The addition of 4-hydroxycoumarin to enones gives ee’s up to 83% and almost quantitative yields in many cases. This novel type of catalysis provides an effective alternative to conventional primary amino catalysis were strong acid additives are essential components.

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45

Ivanov, Ivo C., Violina T. Angelova, Nikolay Vassilev, Ioannis Tiritiris, and Boyan Iliev. "Synthesis of 4-Aminocoumarin Derivatives with N-Substitutents Containing Hydroxy or Amino Groups." Zeitschrift für Naturforschung B 68, no. 9 (2013): 1031–40. http://dx.doi.org/10.5560/znb.2013-3102.

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Reactions of 4-hydroxycoumarin (1a) and 4-chlorocoumarin-3-carbaldehyde (1b) with amino alcohols or alkylene diamines led to the formation of the corresponding N-substituted 4-aminocoumarins 3, 5 and 6. However, 4-hydroxycoumarin-3-carbaldehyde (8) reacted with 2-aminoethanol and ethylenediamine to give N-substituted 3-(aminomethylene)-chromane-2,4-diones 9a, b. The structure and the E-configuration of compound 6 were proven by X-ray crystal structure analysis. Products 9a, b displayed signals of both E- and Z-isomers in their NMR spectra. All novel products have been characterized by means of

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46

Sibdas, Ray, and Kr. Paul Subol. "Studies on reaction of hydroxycoumarin compounds with formamide." Journal of Indian Chemical Society Vol. 81, Jun 2004 (2004): 488–91. https://doi.org/10.5281/zenodo.5833444.

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Department of Chemistry, University of Calcutta, University College of Science, Kolkata-700 009, India <em>E-mail :</em> sibdas2002@yahoo.co.in <em>Manuscript received 24 November 2003, accepted 21 January 2004</em> 3-Hydroxycoumarin, on reaction with hot formamide, produced 3-formylaminocoumarin (2) which underwent deformylation on fusion with <em>p</em>-toluenesulphonic acid monohydrate to produce very pure variety of 3- aminocoumarin. 4-Hydroxycoumarin and 4-hydroxybenzo[b]thiopyran-2-one (7) on similar reaction produced benzo[l]pyrano[ 4,3-<em>d</em>]oxazol-4-one (6) and benzo[l]thiopyrano

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47

Elinson, Michail, Anatoly N. Vereshchagin, and Olga O. Sokolova. "Fast highly efficient 'on-solvent' non catalytic cascade transformation of benzaldehydes and 4-hydroxycoumarin into bis(4-hydroxycoumarinyl)arylmethanes." Arkivoc 2017, no. 3 (2017): 121–29. http://dx.doi.org/10.24820/ark.5550190.p010.023.

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48

Jung, Jae-Chul, Ju-Cheun Kim, and Oee-Sook Park. "Simple and Cost Effective Syntheses of 4-Hydroxycoumarin." Synthetic Communications 29, no. 20 (1999): 3587–95. http://dx.doi.org/10.1080/00397919908085993.

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49

Kolos, N. N., L. L. Gozalishvili, E. N. Sivokon’, and I. V. Knyazeva. "Reaction of 4-hydroxycoumarin with arylglyoxals and ureas." Russian Journal of Organic Chemistry 45, no. 1 (2009): 119–25. http://dx.doi.org/10.1134/s1070428009010151.

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50

Traven, Valery F., Alexander V. Manaev, Olga B. Safronova, and Tatjana A. Chibisova. "HeI photoelectron spectra and structure of 4-hydroxycoumarin." Journal of Electron Spectroscopy and Related Phenomena 122, no. 1 (2002): 47–55. http://dx.doi.org/10.1016/s0368-2048(01)00320-6.

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