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Journal articles on the topic '4-pentanedione'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Hunter, Duncan H., Chantelle McRoberts, and Jagadese J. Vittal. "Article." Canadian Journal of Chemistry 76, no. 5 (1998): 522–24. http://dx.doi.org/10.1139/v98-066.

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Attempts to prepare 2,4-bisthiosemicarbamoylpentanediones 1 via literature precedent from 2,4-pentanedione and three different thiosemicarbazides resulted instead in the formation of cyclic pyrazolines 5. The preparation was attempted with thiosemicarbazide, 4-methylthiosemicarbazide, and 4-ethylthiosemicarbazide, respectively. A single-crystal X-ray structure study of the product from 4-methylthiosemicarbazide confirmed the pyrazoline structure. This observation serves to correct earlier misassignments of structure.Key words: pentanedione, bisthiosemicarbazone, pyrazoline, ethylenediamine.

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2

Marchalín, Štefan, Dušan Ilavský, Jaroslav Kováč, and Milan Bruncko. "Synthesis and reactions of 5-acetyl-2-amino-3-cyano-4-(5-X-2-furyl)-6-methyl-4H-pyrans." Collection of Czechoslovak Chemical Communications 55, no. 3 (1990): 718–27. http://dx.doi.org/10.1135/cccc19900718.

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Substituted 2-amino-4-(5-X-2-furyl)-4H-pyrans IIIa-IIIe have been prepared by a cyclization reaction of 5-X-2-furylmethylenepropanedinitriles IIa-IIe with 2,4-pentanedione. In reaction of 3-(5-X-2-furyl)-methylene-2,4-pentanediones Ia-Ie with propanedinitrile the formation of 4H-pyrans IIIa-IIIe is accompanied, depending on the catalyst type, by the formation of 5-X-2-furylmethylenepropanedinitriles IIa-IIe. 2-(4-Methylbenzylideneamino)-4H-pyran (V), 2-formylamino-4H-pyran (VI), and 3H, 5H-pyrano[2,3-d]pyrimidine-4-one (VII) have been synthesized by functional modifications of the amino group

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3

Aakeröy, Christer B., Izhar Hussain, Safiyyah Forbes, and John Desper. "Versatile Ligands for the Construction of Layered Metal-Containing Networks." Australian Journal of Chemistry 62, no. 8 (2009): 899. http://dx.doi.org/10.1071/ch08440.

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The synthetic opportunities furnished by organic synthesis and the inherent structure-directing possibilities of coordination complexes have been combined in the assembly of a series of layered metal-containing hybrid materials. The supramolecular assembly relies on self-complementary non-covalent interactions, and in five of the six structures presented herein, N–H···O=C hydrogen bonds between acetamide moieties on neighbouring ligands provide the primary structure-direction tool as intended. The distances between metal ions are controlled by ligand···ligand hydrogen bonds and reside within a

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4

Prlainovic, Nevena, Dejan Bezbradica, Zorica Knezevic-Jugovic, Dusan Velickovic, and Dusan Mijin. "Enzymatic synthesis of vitamin B6 precursor." Journal of the Serbian Chemical Society 78, no. 10 (2013): 1491–501. http://dx.doi.org/10.2298/jsc130322050p.

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3-Cyano-4-ethoxymethyl-6-methyl-2-pyridone is an important precursor in the synthesis of vitamin B6, obtained in the addition reaction between 2-cyanoacetamide and 1-ethoxy-2,4-pentanedione catalyzed by lipase from Candida rugosa (triacylglycerol ester hydrolases, EC 3.1.1.3). This work shows new experimental data and mathematical modeling of lipase catalyzed synthesis of 3-cyano-4-ethoxymethyl-6-methyl-2-pyridone, starting from 1-ethoxy-2,4-pentanedione and 2-cyanoacetamide. Kinetic measurements were done at 50 oC with enzyme concentration of 1.2 % w/v. Experimental results were fitted with t

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5

Pei, Li-Xia, Xian-Zhang Bu, Lian-Quan Gu, and Seik Weng Ng. "3-[(4-Hydroxy-3-methoxyphenyl)methylene]-2,4-pentanedione." Acta Crystallographica Section E Structure Reports Online 61, no. 3 (2005): o541—o543. http://dx.doi.org/10.1107/s1600536805002941.

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6

Cadierno, Victorio. "(E)-1,1,1-Trifluoro-6,6-bis(4-methoxyphenyl)hexa-3,5-dien-2-one." Molbank 2020, no. 1 (2020): M1120. http://dx.doi.org/10.3390/m1120.

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The title compound was obtained in high yield (84%) via the deacetylation of 3-(3,3-bis(4-methoxyphenyl)allylidene)-1,1,1,5,5,5-hexafluoro-2,4-pentanedione with K2CO3 in refluxing methanol. This previously unreported compound has been fully characterized by 19F{1H}, 1H and 13C{1H} NMR, IR, UV-Vis, and HRMS.

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7

Guo, Huan Mei, Yun Chen Zhang, and Yu Feng Li. "Synthesis and Crystal Structure Studies on 3-(4-Fluorophenyl)-1,5-Bis(pyridyl)-1,5-Pentanedione." Advanced Materials Research 926-930 (May 2014): 300–303. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.300.

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3-(4-Fluorophenyl)-1,5-bis (pyridyl)-1,5-pentanedione has been synthesized and the crystal structure has been determined by means of single-crystal X-ray diffraction. In the moleculer structure,the phenyl ring and the two pyridine rings are almost perpendicular , and two pyridine rings are closed to coplane.

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8

Milata, Viktor, Dušan Ilavský, Igor Goljer, and Ján Leško. "4-N-Benzazolylamino Derivatives of 3-Y-3-Buten-2-one." Collection of Czechoslovak Chemical Communications 57, no. 3 (1992): 531–39. http://dx.doi.org/10.1135/cccc19920531.

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Ethoxymethylene derivatives of 2,4-pentanedione (Ia), 3-oxobutanenitrile (Ib), methyl (Ic) or ethyl (Id) 3-oxobutanoate give with 4- or 5-aminobenzimidazole or benzotriazole, respectively, under mild conditions products of nucleophilic substitution II-V. Structure of these compounds was discussed on the basis of their spectral measurements - IR, UV, 1H, 13C NMR and mass spectra.

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9

Jha, Anjali, Y. L. N. Murthy, G. Durga, and T. T. Sundari. "Microwave-Assisted Synthesis of 3,5-Dibenzyl-4-amino-1,2,4-triazole and its Diazo Ligand, Metal Complexes Along with Anticancer Activity." E-Journal of Chemistry 7, no. 4 (2010): 1571–77. http://dx.doi.org/10.1155/2010/569605.

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Synthesis of 3,5-dibenzyl-4-amino-1,2,4-triazole was accomplished via a conventional method as well as microwave irradiation method, followed by diazotization and coupling with 2,4-pentanedione. The dinucleating ligand was isolated and complexed with Ni(II), Cu(II) and Ru(III) chlorides. These complexes were screened on Jurkat, Raji & PBMC cell lines for anticancer activity. Ruthenium complexes showed potential anticancer activities.

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10

KHACHATRYAN, D. S., A. A. VARDAPETYAN, G. A. PANOSYAN, R. G. MIRZOYAN, and N. M. MORLYAN. "ChemInform Abstract: Alkylation of Carbon Acids in the Presence of Potassium Carbonate. Part 4. Alkylation of 2,4-Pentanedione and 3-Methyl-2,4-pentanedione." ChemInform 22, no. 15 (2010): no. http://dx.doi.org/10.1002/chin.199115101.

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11

Merkens, Carina, Fangfang Pan, and Ulli Englert. "3-(4-Pyridyl)-2,4-pentanedione – a bridge between coordinative, halogen, and hydrogen bonds." CrystEngComm 15, no. 40 (2013): 8153. http://dx.doi.org/10.1039/c3ce41306c.

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12

MAMEDOV, V. A., I. A. LITVINOV, YU YA EFREMOV, et al. "ChemInform Abstract: Condensation of Methyl 2-Hydrazino-5-phenylthiazolecarboxylate with 2, 4-Pentanedione." ChemInform 25, no. 20 (2010): no. http://dx.doi.org/10.1002/chin.199420161.

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13

Lei, Ying Jie, Ye Bi, and Ou Yang Jie. "Synthesis of some Curcumin Analogues under Ultrasound Irradiation." Advanced Materials Research 332-334 (September 2011): 1623–26. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1623.

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A convenient method to synthesize curcumin and its five analogues, which were named as 1,7-diphenyl-1,6-heptadiene-3,5-dione,1,7-Bis-(4-hydroxy-phenyl)-1,6-heptadiene-3,5-dione,1,7-Bis-(4-methoxy-phenyl)-1,6-heptadiene-3,5-dione,1,7-Bis-(2-hydroxy-3-methoxy-phenyl)-1,6-heptadiene-3,5-dione and 1,7-Bis-(2,3-dimethoxy-phenyl)-1,6-heptadiene-3,5-dione respectively, via the Claisen condensation of aromatic aldehyde and 2,4-pentanedione in the presence of trimethyl borate and monoethanolamine under ultrasound irradition was reported. The corresponding physical properties were characterized by IR, 1

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14

BOWLES, BOBBY L., and ARTHUR J. MILLER. "Antibotulinal Properties of Selected Aromatic and Aliphatic Ketones." Journal of Food Protection 56, no. 9 (1993): 795–800. http://dx.doi.org/10.4315/0362-028x-56.9.795.

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Several aromatic and aliphatic ketones were tested for inhibitory activity against Clostridium botulinum spores and cells. Six-tenths mM 3-heptanone, 3-hexanone, or benzophenone delayed spore germination in botulinal assay medium (BAM) broth at 32°C. Sporicidal activity was observed for 1,250 mM 2,3-pentanedione, while 2-octanone, 3-octanone, or benzophenone were effective at 2,500 mM. In general, higher concentrations were required to inhibit vegetative cells than to prevent spore germination. Maximum activity against vegetative cells was observed at 25 mM acetanisole (4′-methoxyacetophenone)

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15

Mahmoud, M. R., A. A. Shalaby, T. A. Gad, and A. A. El-Khamry. "A facile synthesis and heteroannulation of pyrido[2,3-d]pyrimidine and related heterocyclic systems." Journal of Chemical Research 2009, no. 10 (2009): 612–15. http://dx.doi.org/10.3184/030823409x12523324765777.

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7-Amino-1,2,3,4-tetrahydro-4-oxo-2-thioxo-5-(3,4,5-trimethoxyphenyl)pyrido[2,3- d]pyrimidine (1) was prepared and reacted with methyl iodide and ethyl chloroacetate to give the S-alkylated products 2 and 3, respectively. The reaction of 1 or 3 with hydrazine hydrate yielded the same 2-hydrazino derivative 4. Treatment of 4 with 2,4-pentanedione, 2-acetylcyclohexanone and ethyl acetoacetate afforded the corresponding pyrazolylpyrido[2,3- d]pyrimidine derivatives (5–7), while phthalic anhydride gave the phthalazinyl compound 8. Ethoxymethylenemalononitrile with the hydrazine 4 formed the fused 1

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16

Shiotani, Akinori. "Die Pd-katalysierte oxidative Kupplungsreaktion von Methylbenzoesäuremethylester / The Pd-Catalyzed Oxidative Coupling Reaction of Methyl Methylbenzoates." Zeitschrift für Naturforschung B 49, no. 12 (1994): 1731–36. http://dx.doi.org/10.1515/znb-1994-1218.

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The Pd-catalyzed oxidative coupling reaction of methyl o-toluate gives, in the presence of a Pd/1,10-phenanthroline(phen)/Cu catalyst, exclusively, the para-linked biphenyldicarboxylates 1, 2, and 3. On the other hand, the meta-linked biphenyldicarboxylates 4 and 5, were predominantly formed in a catalyst system of Pd/2,4-pentanedione(acacH)/Cu, and under similar conditions 6 and 7 were also obtained from the coupling reaction of methyl m-toluate and methyl p-toluate, respectively. A reaction scheme has been proposed.

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17

Chang, Jie, Su Li Wu, and Shu Fen Zhang. "Synthesis, Properties and Applications of Polymer-Grafted SrAl₂O₄: Eu²⁺, Dy³⁺." Advanced Materials Research 634-638 (January 2013): 2314–17. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.2314.

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A polymer-grafted SrAl2O4: Eu2+, Dy3+ (PG-SAO-ED) were synthesized by using a bi-functional ligand (3-allyl-2, 4-pentanedione, denoted as APD) as a bridge, which can coordinate with the unsaturated metal ions on the surface of SrAl2O4: Eu2+, Dy3+ (SAO-ED) at one end, and copolymerize with methyl methacrylate and styrene at the other end. The sample was analyzed by FT-IR and Powder X-ray diffraction patterns (XRD). The PG-SAO-ED can well be applied in painting or ink, they have good miscibility with organics. The luminescent painting containing PG-SAO-ED has greatly higher water resistance than

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18

Gulya, A. P., S. N. Spynu, V. I. Tsapkov, and D. Poirer. "Sulfanylamide-containing coordination compounds of 3d-elements with 2,4-pentanedione bis-thiosemicarbazone and bis-4-phenylthiosemicarbazone." Russian Journal of General Chemistry 78, no. 5 (2008): 984–90. http://dx.doi.org/10.1134/s1070363208050253.

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19

Gadzhieva, S. R., F. G. Pashaev, F. M. Chyragov, A. G. Gasanov, and K. T. Makhmudov. "Thermodynamic characteristics of metal complexation with 3-[4-iodophenylazo]-2,4-pentanedione in an aqueous ethanol solution." Russian Journal of Inorganic Chemistry 52, no. 4 (2007): 640–44. http://dx.doi.org/10.1134/s0036023607040304.

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20

Yun, Sock Sung, Il-Hwan Suh, Sung-San Choi, Tae-Hun Kim, and Samkeun Lee. "ALTERNATIVE FORMATION AND CRYSTAL STRUCTURE OF TRIS(ACETYLACETONATO)TITANIUM(HI) FROM TITANOCENE AND 2, 4-PENTANEDIONE." Journal of Coordination Chemistry 47, no. 2 (1999): 315–18. http://dx.doi.org/10.1080/00958979908023063.

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21

R., N. Prasad, Gupta Seema, and Jangir Sarita. "Synthesis and characterization of MgII, CaII, SrII and BaII complexes of 2, 15-dimethyl-3, 16-diethyl/propyl/phenyl-1 ,4, 14,17 -tetraazacyclohexacosa- 1,3,14,16-tetraene." Journal of Indian Chemical Society Vol. 88, May 2011 (2011): 653–57. https://doi.org/10.5281/zenodo.5769024.

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Department of Chemistry, University of Rajasthan, Jaipur-302 055, Rajasthan, India <em>E-mail</em> : rnp _1949@yahoo.co.in <em>Manuscript received 02 September 2008, revised 08 September 2010, accepted 15 September 2010</em> 2+2 Cyclocondensation reactions of 1,9-diaminononane with a-diketones viz. 2,3-pentanedione, 2,3-hexanedione or 1-phenyl-1,2-propanedione in the presence of metal ions as templates have afforded hexacoordinated complexes of the general formula [MLX<sub><sup>2</sup></sub>] (where M = Mg, Ca, Sr or Ba; L = N<sub>4</sub> macrocycle having 26-membered ring and X = Cl or NCS).

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22

Garman, RH, DE Dodd, and B. Ballantyne. "Central neurotoxicity induced by subchronic exposure to 2,4-pentanedione vapour." Human & Experimental Toxicology 14, no. 8 (1995): 662–71. http://dx.doi.org/10.1177/096032719501400807.

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1 Male and female Fischer 344 rats were exposed to 2,4- pentanedione (2,4-PD) vapour acutely (4 h) at 1265 or 1811 ppm, or for 6 h day-1 , 5 days a week for 14 weeks to 0, 101, 307 or 650 ppm. 2 Mortality occurred during or within a few hours of the acute exposures (10% at 1265 ppm; 70% at 1811 ppm). No animal had gross or microscopic brain lesions. 3 All female rats (20) and 10 of 30 male rats exposed to 650 ppm 2,4-PD vapour died by the 38th study day (29 exposures); there were no subsequent male deaths. Twenty-five of the 30 animals that died, and seven of the 15 males that survived, had li

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23

Heleyová, Katarína, Dušan Ilavský, Vladimír Bobošík, and Naďa Prónayová. "Gould-Jacobs Reaction of 5- and 6-Amino-2-substituted Benzoxazoles. II. Reaction with 3-Ethoxymethylene-2,4-pentanedione and Ethyl 2-Ethoxymethylene-3-oxobutanoate." Collection of Czechoslovak Chemical Communications 61, no. 3 (1996): 371–80. http://dx.doi.org/10.1135/cccc19960371.

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Nucleophilic reaction of 5-amino- and 6-amino-2-substituted benzoxazoles 1 and 2 with 3-ethoxymethylene-2,4-pentanedione (3) gave compounds 5 and 6. Compounds 1 and 2 reacted with ethyl ethoxymethylene-3-oxobutanoate (4) under formation of compounds 7and 8. The substitution products 7 and 8 underwent thermal cyclization at high temperature (boiling mixture of diphenyl ether and biphenyl) to give angularly and linearly annelated derivatives of 5-acetyl-4-oxo-oxazolo[4,5-f]quinoline 9 and 7-acetyl-8-oxo-oxazolo[5,4-g]quinoline 10 (from 7), and derivatives of 8-acetyl-9-oxo-oxazolo[5,4-f]quinolin

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24

G�rg, Michaela, Uwe Dieckbreder, Ralph-Matthias Schoth, Gerd-Volker R�schenthaler, and Alexander A. Kadyrov. "1,1,1,4,5,5,5-Heptafluoro-4-(trifluoromethyl)-2,3-pentanedione, a potent reagent for the synthesis of cyclic ?5?5 phosphoranes." Heteroatom Chemistry 9, no. 2 (1998): 109–13. http://dx.doi.org/10.1002/(sici)1098-1071(1998)9:2<109::aid-hc2>3.0.co;2-7.

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25

Hu, Thomas Q., and Larry Weller. "Design and synthesis of analogues of ionomycin." Canadian Journal of Chemistry 72, no. 6 (1994): 1500–1511. http://dx.doi.org/10.1139/v94-187.

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Based on the analysis of the crystal structure of the Ca2+ salt of ionomycin and the chemical and physical data on ionomycin, a number of ionomycin analogues have been synthesized to study the structural features affecting the Ca2+ binding and transport. Compounds 2, 3, and 4 were synthesized to study the effect of additional intramolecular oxygen coordination sites on Ca2+ transport. Compounds 5a–5d were prepared to study the effect of lipid solubility on Ca2+ binding and transport. Compounds 6a–6c were prepared to study the effect of the distance between the β-diketone and the carboxyl group

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26

GOERG, M., U. DIECKBREDER, R. M. SCHOTH, G. V. ROESCHENTHALER та A. A. KADYROV. "ChemInform Abstract: 1,1,1,4,5,5,5-Heptafluoro-4-(trifluoromethyl)-2,3-pentanedione, a Potent Reagent for the Synthesis of Cyclic λ5σ5 Phosphoranes." ChemInform 29, № 25 (2010): no. http://dx.doi.org/10.1002/chin.199825204.

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27

Alsiddig, Osama, Awadelkarim Sufyan, Ali Noha, Khalid Safa, Mohammed Shima, and Hashim Nosiba. "Phytochemical Composition and Evaluation of Antimicrobial Activity of Blepharis linariifolia (Pers.) Seeds." Asian Journal of Chemical Sciences 2, no. 2 (2017): 1–6. https://doi.org/10.9734/AJOCS/2017/33182.

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<em>Blepharis linariifolia</em> (Pers.) originates from Sudan and grows widely in Africa. The current study has been designed to evaluate the bioactive compounds and antimicrobial activity of the n-hexane extract of <em>Blepharis linariifolia </em>seeds. The extract was analyzed by GC-MS (Model GCMS-QP2010 Ultra, Shimadzu Co., Japan) which revealed the presence of 2-Pentanol, 2-methyl;3-Pentanol, 3-methyl; 2-Hexanone; Hexanal; Benzaldehyde, 4-fluoro; 4-Methyl-4-(tetrahydropyran-2-yl)oxypentane-2,3-dione; 4-methyl-4-[3',4',5',6'-tetrahydro-2'-H-pyranyl-2'-oxy]-2,3-pentanedione; Hexane, 1,1'-oxy

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28

Eseyin, Anthonia E., El Barbary Hassan, and Emad, M. El-Giar. "Comparative analyses of Nigerian and US corn Stalks, using PY-GC/MS." International Journal of Advanced Chemistry 3, no. 1 (2015): 18. http://dx.doi.org/10.14419/ijac.v3i1.4328.

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<p>Pyrolysis gas chromatography mass spectrometry (Py-GC/MS) studies were carried out on the Nigerian and US corn stalks at 500 °C. Analyses of the fast pyrolysis products showed that the Nigerian corn stalks produced more diverse compounds like: acetaldehyde, acetic acid methyl ester, 2,3-pentanedione, 1-hydroxy-2-butanone, butanedial, phenol and vanillin. On the other hand, the pyrolyzed US corn stalks produced compounds like: furfural, phenol, 2-methoxy, 2-methylbenzaldehyde, and 2-methoxy-4-vinylphenol which had significantly high peak area percentages. Few anhydrous sugars were dete

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29

Cordero Giménez, Keysha T., Victoria Y. Soto Díaz, Jean C. González Espiet, et al. "Crystal structure, Hirshfeld surface analysis and spectroscopic characterization of the di-enol tautomeric form of the compound 3,3′-[(2-sulfanylidene-1,3-dithiole-4,5-diyl)bis(sulfanediyl)]bis(pentane-2,4-dione)." Acta Crystallographica Section E Crystallographic Communications 76, no. 9 (2020): 1427–32. http://dx.doi.org/10.1107/s2056989020010695.

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The reaction between [TBA]2[Zn(dmit)2] and 3-chloro-2,4-pentanedione yielded single crystals of the title compound, (3E,3′E)-3,3′-[(2-sulfanylidene-1,3-dithiole-4,5-diyl)bis(sulfanediyl)]bis(4-hydroxypent-3-en-2-one), C13H14O4S5, after solvent evaporation. The title compound crystallizes in the triclinic space group P\overline{1} with two molecules related by an inversion center present in the unit cell. The central thione ring moiety contains a carbon–carbon double bond covalently linked to two sulfoxide substituents located outside of the plane of the ring. The S—C—C—S torsion angles are −17

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30

R., N. Prasad, and Sharma Nisha. "Template synthesis of alkaline earth metal complexes of oxa-azamacrocycles derived from P-diketones." Journal of Indian Chemical Society Vol. 89, Jan 2012 (2012): 29–34. https://doi.org/10.5281/zenodo.5751254.

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Department of Chemistry, University of Rajasthan, Jaipur-302 055, Rajasthan, India <em>E-mail</em> : rnp _1949@yahoo.co.in <em>Manuscript received 08 October 2010, revised 07 April 2011, accepted 20 April 2011</em> Complexes of the type<strong> </strong>[MLCl]Cl (where M = Mg<sup>ll</sup>, Ca<sup>ll</sup>, Sr<sup>II</sup> an Ba<sup>II</sup> ; L = N<sub>2</sub>O<sub>3</sub> type macrocycle having IS-membered ring) have been synthesized by 1 + 1 cyclocondensation of l, 13-diamino-4, 7,1 0-trioxatridecane and β-diketones such as 2,4-pentanedione, 1-phenyl-1,3-butanedione or 1,3-diphenyl-1,3-

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31

K., Krishnankutty, Basheer Ummathu Muhammed, and Sayudevi P. "Schiff bases of 3-(2-thiazolylazo)-2,4-pentanedione with phenylenediamines and their metal complexes." Journal of Indian Chemical Society Vol. 86, Apr 2009 (2009): 325–30. https://doi.org/10.5281/zenodo.5809040.

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Department of Chemistry, University of Calicut, Calicut-673 635, Kerala, India Department of Chemistry, Unity Women's College, Manjeri-676 122, Kerala, India <em>E-mail </em>: mbummathur@rediffmail.com Department of Chemistry, NSS College, Manjeri-676 122, Kerala, India <em>Manuscript received 11 June 2008, revised 31 December 2008, accepted 2 January 2009</em> Reaction of phenylenediamines with 3-(2-thiazolylazo)-2,4-pentanedione yielded a new series of polydentate Schiff base ligands. Spectral and analytical data revealed the condensation of <em>o</em>- and <em>m</em>-phenylenediamines i

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32

Tyl, Rochelle W., Bryan Ballantyne, Louan C. Fisher, Denise J. Tarasi, and Darol E. Dodd. "Dominant Lethal Assay of 2,4-Pentanedione Vapor in Fischer 344 Rats." Toxicology and Industrial Health 5, no. 3 (1989): 463–77. http://dx.doi.org/10.1177/074823378900500307.

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2,4-Pentanedione (2,4-PD: CAS No. 123-54-6) is a volatile industrial chemical of moderate acute toxicity, centrally neurotoxic by repeated exposure to high vapor concentrations, fetotoxic, and clastogenic. Its wide use and known toxicology indicated the conduct of a dominant lethal assay. Male Fischer 344 rats, 20 per group, were exposed to 2,4-PD vapor concentrations (mean ± SD) of 0, 99.1 ± 2.2, 412 ± 12.6 and 694 ± 9.1 ppm, for 6 hr/day for 5 consecutive days. The day following the final exposure they were bred to unexposed female Fischer 344 rats, 2 per week for 8 consecutive weeks. Weight

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33

Oramahi, Hasan Ashari, Tsuyoshi Yoshimura, Elvi Rusmiyanto, and Kustiati Kustiati. "Optimization and Characterization of Wood Vinegar Produced by Shorea laevis Ridl Wood Pyrolysis." Indonesian Journal of Chemistry 20, no. 4 (2020): 825. http://dx.doi.org/10.22146/ijc.45783.

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In this study, the Box-Behnken Design (BBD) was employed to investigate the effects of wood particle size, pyrolysis temperature, and pyrolysis time on the production of wood vinegar from Indonesia “bengkirai” wood (Shorea laevis Ridl). Characterization of wood vinegar was conducted by gas chromatography-mass spectrometry (GC-MS). Three variable designs consisting of wood particle size (2.00, 2.38, and 3.36 mm), pyrolysis temperature (350, 400, and 450 °C), and pyrolysis time (105, 120, and 135 min) were employed in a BBD response surface methodology (RSM-BBD). RSM-BBD results suggested that m

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Li, Xiaojing, Lan Yan, Hui Wanyan, Xiangming Li, and Rudong Yang. "Investigation on lanthanide binuclear complexes of 1,5-bis-(1′-phenyl-3′-methyl-5′-pyrazolone-4′)-1,5-pentanedione and 2,2′-bipyridine." Polyhedron 13, no. 24 (1994): 3317–21. http://dx.doi.org/10.1016/s0277-5387(00)83113-7.

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Suhartono, E., A. Biworo, PB Santosa, et al. "Molecular docking studies of 4-ethyl-2-metoxyphenol and 1,3-cyclopentanedione compounds from gemor (Nothaphoebe coriacea) with glucagon like-peptide-1 (GLP-1) receptor." IOP Conference Series: Earth and Environmental Science 976, no. 1 (2022): 012050. http://dx.doi.org/10.1088/1755-1315/976/1/012050.

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Abstract Gemor (Nothaphoebe coriacea) is a plant that grows in wetland forests. Many studies have revealed the potential of this plant for health and medicine, among others as an antioxidant, anti-inflammatory, antidiabetic, and others. However, the mechanism is unknown or not yet discovered. Previous studies have shown that gemor bark contains active compounds. One of them is 4-ethyl-2-metoxyphenol (PubChem ID 62465) and 1,3-cyclo pentanedione (PubChem CID 77466) compounds. This research will prove that 2 compounds act as antidiabetic by influencing Glucagon like-Peptide-1 (GLP-1) Receptor. M

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K., Krishnankutty, Sayudevi P., and Basheer Ummathur Muhammed. "Schiff bases of 3-(2-thiazolylazo)-2,4-pentanedione with aliphatic diamines and their metal complexes." Journal of Indian Chemical Society Vol. 85, Jan 2008 (2008): 48–52. https://doi.org/10.5281/zenodo.5808517.

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Department of Chemistry, University of Calicut, Calicut-673 635, Kerala, India Department of Chemistry, NSS College, Manjeri-676 122, Kerala, India Department of Chemistry, Unity Women's College, Manjeri-676 122, Kerala, India <em>E-mail :</em> mbummathur@rediffmail.com <em>Manuscript received 23 July 2007, revised 8 October 2007, accepted 12 October 2007</em> Reaction of aliphatic diamines [1,2-diaminoethane, 1,3-diaminopropane and 1,6-diaminohexane] with 3- (2-thiazolylazo)-2,4-pentancdione yielded a new series of polydentate Schiff base ligands. The existence of these compounds predomin

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TATSUYA, SEKINE, YAGISAWA CHIYOKO, INABA KAZUHO та KURIHARA TAKASHI. "Rate Measurements of Complex Formation of lron(III) with β-Diketones in 4-Methyl-2-pentanone by Solvent Extraction Method". Journal of Indian Chemical Society Vol. 62, Dec 1985 (1985): 936–39. https://doi.org/10.5281/zenodo.6322701.

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Department of Chemistry, Science University<sup>.</sup> of Tokyo, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162 The rate of solvent extraction of iron(III) in aqueous perchlorate solutions with three <em>β</em>-diketones (HA), 1-phenyl-1,3-butanedione, 1 phenyl-4,4,4-trifluoro-1,3-butanedione, and 1,1,1-trifluoro-2,4-pentanedione, into 4-methyl-2-pentanone has<em> </em>been determined and the reaction mechanism in each system was considered. From the results, two reaction routes were concluded, (i) Fe<sup>2+</sup> formed complexes in the aqueous phase and the complexes thus f

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Chowdhury, Sanjib, Leonor Maria, Adelaide Cruz, et al. "Uranium Carbide Fibers with Nano-Grains as Starting Materials for ISOL Targets." Nanomaterials 10, no. 12 (2020): 2458. http://dx.doi.org/10.3390/nano10122458.

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This paper presents an experimental study about the preparation, by electrospinning, of uranium carbide fibers with nanometric grain size. Viscous solutions of cellulose acetate and uranyl salts (acetate, acetylacetonate, and formate) on acetic acid and 2,4-pentanedione, adjusted to three different polymer concentrations, 10, 12.5, and 15 weight %, were used for electrospinning. Good quality precursor fibers were obtained from solutions with a 15% cellulose acetate concentration, the best ones being produced from the uranyl acetate solution. As-spun precursor fibers were then decomposed by slo

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BRUICE, P. Y. "ChemInform Abstract: Role of the Acidity of the Ketone in Determining the Mechanism of Enolization via Proton Abstraction from Ketone, Carbinolamine, or Imine. Catalysis of the Enolization of 2,4-Pentanedione and 3-Methyl-2, 4-pentanedione by Oxyanions an." ChemInform 22, no. 2 (2010): no. http://dx.doi.org/10.1002/chin.199102087.

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Yang, Luqin, and Rudong Yang. "Synthesis and crystal structure of the dinuclear complex of 1,5-bis(1′-phenyl-3′-methyl-5′-pyrazolone-4′)-1,5-pentanedione with samarium." Polyhedron 14, no. 4 (1995): 507–10. http://dx.doi.org/10.1016/0277-5387(94)00270-o.

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Zav'yalov, I. A., E. R. Milaeva, and A. I. Prokofev. "Formation of a complex with the anionic quinoid structure in the interaction of 3-(3',5'-di-tert-hutyl-4'-hydroxybenzylidene)- pentanedione-2, 4 with copper(II) acetate." Russian Chemical Bulletin 43, no. 1 (1994): 179–80. http://dx.doi.org/10.1007/bf00699169.

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Arfi, Kenza, Sophie Landaud, and Pascal Bonnarme. "Evidence for Distinct l-Methionine Catabolic Pathways in the Yeast Geotrichum candidum and the Bacterium Brevibacterium linens." Applied and Environmental Microbiology 72, no. 3 (2006): 2155–62. http://dx.doi.org/10.1128/aem.72.3.2155-2162.2006.

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ABSTRACT Tracing experiments were carried out to identify volatile and nonvolatile l-methionine degradation intermediates and end products in the yeast Geotrichum candidum and in the bacterium Brevibacterium linens, both of which are present in the surface flora of certain soft cheeses and contribute to the ripening reactions. Since the acid-sensitive bacterium B. linens is known to produce larger amounts and a greater variety of volatile sulfur compounds (VSCs) than the yeast G. candidum produces, we examined whether the l-methionine degradation routes of these microorganisms differ. In both

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Allamand, Alizée, Teresa Piechowiak, Didier Lièvremont, Michel Rohmer, and Catherine Grosdemange-Billiard. "The Multifaceted MEP Pathway: Towards New Therapeutic Perspectives." Molecules 28, no. 3 (2023): 1403. http://dx.doi.org/10.3390/molecules28031403.

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Isoprenoids, a diverse class of natural products, are present in all living organisms. Their two universal building blocks are synthesized via two independent pathways: the mevalonate pathway and the 2-C-methyl-ᴅ-erythritol 4-phosphate (MEP) pathway. The presence of the latter in pathogenic bacteria and its absence in humans make all its enzymes suitable targets for the development of novel antibacterial drugs. (E)-4-Hydroxy-3-methyl-but-2-enyl diphosphate (HMBPP), the last intermediate of this pathway, is a natural ligand for the human Vγ9Vδ2 T cells and the most potent natural phosphoantigen

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Zhang, Sheng-Hua, Xin Yu, Feng Guo, and Zhuo-ying Wu. "Effect of interspecies quorum sensing on the formation of aerobic granular sludge." Water Science and Technology 64, no. 6 (2011): 1284–90. http://dx.doi.org/10.2166/wst.2011.723.

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Quorum sensing (QS) is a form of microbial communication that relies on small signal molecules to regulate group behaviors such as bioﬁlm formation in response to population density. In this study, we attempted to apply the paradigm of bacterial QS to aerobic granular sludge (AGS) formation for wastewater treatment. An essential element of interspecies QS signals, boron, was added to a sequencing batch reactor (SBR) to stimulate AGS growth. Bioassays elaborated the activity of autoinducer-2 (AI-2). We found that boron accelerated AGS growth, resulting in improved settlement performance and inc

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Potvin, Pierre G., and Benjamin G. Fieldhouse. "An NMR study of mixed, tartrate-containing TiIV complexes." Canadian Journal of Chemistry 73, no. 3 (1995): 401–13. http://dx.doi.org/10.1139/v95-053.

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The reactions of amines and amino alcohols with diisopropyl or diethyl R,R- or S,S-tartrate and Ti(OiPr)4 were examined by 1H and 13C NMR to obtain and characterize nonfluxional complexes with the tartrate units in novel binding modes. The mildly acidic 8-hydroxyquinoline and N-phenyl-N-benzoylhydroxylamine selectively formed the products of a double OiPr substitution, Ti2(tartrate)2(ligand)2(OiPr)2, and the products of double tartrate substitution, Ti(ligand)2(OiPr)2, while 2,4-pentanedione formed only the latter Basic amino alkanols formed diastereomerically pure Ti2(tartrate)2(aminoalkoxide

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Davies, Sian C., Marcus C. Durrant, David L. Hughes, Abbas Pezeshk, and Raymond L. Richards. "Coordination chemistry of a pyrazoline derived from 2,4-pentanedione bis(4-methylthiosemicarbazone). Crystal structure of the pyrazoline and evidence for metal-mediated ring opening." Journal of Chemical Research 2001, no. 3 (2001): 100–103. http://dx.doi.org/10.3184/030823401103169252.

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Vallon, Magdalena, Linyu Gao, Feng Jiang, et al. "LED-based solar simulator to study photochemistry over a wide temperature range in the large simulation chamber AIDA." Atmospheric Measurement Techniques 15, no. 6 (2022): 1795–810. http://dx.doi.org/10.5194/amt-15-1795-2022.

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Abstract. A light source has been built at the AIDA (Aerosol Interactions and Dynamics in the Atmosphere) simulation chamber at the Karlsruhe Institute of Technology, simulating solar radiation at ground level. Instead of full spectra light sources, it uses a combination of LEDs with a narrow emission spectrum, resulting in a combined spectrum similar to the solar spectrum between 300 and 530 nm. The use of LEDs leads to an energy-efficient, robust and versatile illumination concept. The light source can be used over a wide temperature range down to −90 ∘C and is adjustable in intensity and sp

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MORALES, PILAR, ISABEL FELIU, ESTRELLA FERNÁNDEZ-GARCÍA, and MANUEL NUÑEZ. "Volatile Compounds Produced in Cheese by Enterobacteriaceae Strains of Dairy Origin." Journal of Food Protection 67, no. 3 (2004): 567–73. http://dx.doi.org/10.4315/0362-028x-67.3.567.

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The formation of volatile compounds in fresh cheese by 10 Enterobacteriaceae strains of dairy origin (4 Hafnia alvei, 2 Serratia liquefaciens, 1 Enterobacter cloacae, 1 Enterobacter sakazakii, and 2 Escherichia coli strains) was investigated. Small cheeses were made from pasteurized cow's milk separately inoculated with 1–3 × 103 CFU/ml of each of the Enterobacteriaceae strains, with glucono-δ-lactone added to achieve a pH value of 5.2 in the curds. All strains reached counts close to 108 CFU/g in 1-day-old cheeses and survived well from day 1 to day 8. Cheeses were analyzed for volatile compo

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Bennett, Alison M. A., Gary A. Foulds, and David A. Thornton. "The IR and 1H, 13C NMR spectra of the nickel(II), copper(II) and zinc(II) complexes of 2,4-pentanedione, 4-imino-2-pentanone, 4-thioxo-2-pentanone and 2,4-pentanedithione: a comparative study." Polyhedron 8, no. 18 (1989): 2305–11. http://dx.doi.org/10.1016/s0277-5387(00)81258-9.

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Mukisa, IM, CMBK Muyanja, YB Byaruhanga, T. Langsrud, and JA Narvhus. "Changes in physico-chemical properties and flavour compounds during fermentation of different obushera (sorghum and millet) beverages." African Journal of Food, Agriculture, Nutrition and Development 12, no. 54 (2012): 6665–85. http://dx.doi.org/10.18697/ajfand.54.11765.

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Four types of Obushera, a fermented millet or sorghum beverage: Ekitiribita, Obuteire, Obutoko and Enturire were analyzed for their physico-chemical properties, sugars, organic acids and volatile compounds during fermentation. Standard chemical methods were used to determine the physico-chemical properties of Obushera. The organic acids, carbohydrates, glucose, fructose and maltose were analyzed by highperformance liquid chromatography. The pH of all Obushera varied between 4.00±0.10 and 4.42±0.11 after 4 days of fermentation. The pH of Obuteire, Obutoko and Enturire dropped below 4.5 within o

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