Relevant bibliographies by topics / Methanediphosphanate(hydroxy phenyl o,o,o',o'-tetramethyl)

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Academic literature on the topic 'Methanediphosphanate(hydroxy phenyl o,o,o',o'-tetramethyl)'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Methanediphosphanate(hydroxy phenyl o,o,o',o'-tetramethyl)"

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Hussein, Imran, Sumathi Anthal, M. B. Deshmukh, and Rajni Kant. "SYNTHESIS AND CRYSTAL STRUCTURE OF 3,3,6,6- TETRAMETHYL-9- (2- HYDROXY PHENYL) -3,4,6,7,9,10-HEXAHYDROACRIDINE-1,8- DIONE." European Chemical Bulletin 6, no. 12 (January 11, 2018): 536. http://dx.doi.org/10.17628/ecb.2017.6.536-538.

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Ma, Hui-Ping, Lin-Lin Jing, Lei He, Peng-Cheng Fan, and Zheng-Ping Jia. "2-[3-Hydroxy-4-(2-hydroxyethoxy)phenyl]-4,4,5,5-tetramethyl-2-imidazoline-1-oxyl 3-oxide." Acta Crystallographica Section E Structure Reports Online 68, no. 1 (December 23, 2011): o218. http://dx.doi.org/10.1107/s1600536811053979.

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3

Savchuk, Sergei A., and Igor G. Zenkevich. "Identification of unknown compound extracted from the hair of exhumed human remains using mass spectrometric and gas chromatographic data." Аналитика и контроль 25, no. 1 (2021): 34–42. http://dx.doi.org/10.15826/analitika.2020.25.1.002.

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The real example of GC-MS identification of unknown constituent of human hair extract belonging to the exhumed remains is considered. The identification of this constituent (molecular weight 238 Da) was unsuccessful using both its standard mass spectrum (electron ionization) in combination with lib­ra­ry search, and its GC retention index value (~1540 on semi-standard non-polar polydimethyl siloxane stationary phases with 5% phenyl groups). However, its identification appea­red to be possible using the original algorithm of data processing. This approach implies revealing the structural analogues of unknown analytes, primarily their homologues which differ by molecular masses on ± 14 Da and by composition on CH2 homolo­go­us difference. This approach allowed revealing such analogues of unknown analyte as Flavesone (2,2,4,4-tetramethyl-2-isobutyrylcyclohexa-1,3,5-trione), Leptospermone (2,2,4,4-tetramethyl-2-isopentanoylcyclohexa-1,3,5-trione), and some others. All these compounds belong to a rather “exotic” class of natural compounds knows as cyclic b-triketones. Based on the obtained data, the possible structure of the constitu­ent under the consideration was proposed as 2,2,4,4-tetramethyl-2-propionylcyclohexa-1,3,5-trione. The principal fea­ture of cyclic b-triketones is their existence in a few tautomeric forms. Another tautomer of triketone under discussion is 5-hydroxy-2,2,6,6-tetramethyl-4-propionyl-4-en-1,3-dio­ne (CAS № 87552-01-0). This compound is found to be the constituent of Leptosper­mum scoparium essential oil and some other plants, and it belongs to the group of structural analogues of Flave­sone. The most known pharmaceutical application of essential oils containing these compounds are the components of conditioners for hair and skin. The results confirm this formerly un­known component does not belong to the group of toxic substances. This excludes the criminal origin of the remains.
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Maurin, J. K., Z. Czarnocki, B. Paluchowska, and M. Winnicka-Maurin. "Conformation-Related Reaction Efficiency of Glutarimides with Phenyllithium. Structures of 3,3,5,5-Tetramethylglutarimide and 2-Hydroxy-2-phenyl-3,3,5,5-tetramethyl-6-piperidone. X-ray and Theoretical Study." Acta Crystallographica Section B Structural Science 53, no. 4 (August 1, 1997): 719–25. http://dx.doi.org/10.1107/s0108768197004874.

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Crystal structures of 3,3,5,5-tetramethylglutarimide [3,3,5,5-tetramethylazacyclohexane-2,6-dione] (8) and the product of its reaction with phenyllithium, 2-hydroxy-2-phenyl-3,3,5,5-tetramethyl-6-piperidone (9), have been determined by X-ray structural methods [(8), monoclinic, P21/c, a = 7.715 (2), b = 11.136 (2), c = 11.707 (2) Å, \beta = 105.63 (3)°; (9), triclinic, P\overline 1, a = 6.1685 (6), b = 11.1475 (10), c = 11.526 (2) Å, \alpha = 117.100 (10), \beta = 103.390(10), \gamma = 91.288 (7)°]. Molecular structures of three different glutarimides are discussed. Their energy optimal structures were determined with the use of ab initio calculations. The results of crystallographic and theoretical studies show that the conformational changes in glutarimide introduced by substitution with methyl groups resulted in electron-charge distribution changes. These differences in charge distribution are the reason for the observed variation in yields of the reaction of glutarimides with phenyllithium.
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5

Nakajima, Akira, Yuto Ueda, Nobuyuki Endoh, Kunihiko Tajima, and Keisuke Makino. "Electron spin resonance analysis of the oxidation reactions of nitrone type spin traps with gold(III) ion." Canadian Journal of Chemistry 83, no. 8 (August 1, 2005): 1178–84. http://dx.doi.org/10.1139/v05-132.

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When cyclic nitrones, such as 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), 4-phenyl-5,5-dimethyl-1- pyrroline-N-oxide (PDMPO), and 3,3,5,5-tetramethyl-1-pyrroline-N-oxide (M4PO) were mixed with hydrogen tetrachloro aurate(III), DMPOX (5,5-dimethyl-1-pyrrolid-2-one-N-oxyl) type free radicals appeared with the precipitation of Au(0). The reaction did not proceed with noncyclic nitrones, such as N-tert-butyl-α-phenyl-nitrone (PBN) and α-(4-pyridyl-1-oxide)-N-tert-butyl-nitrone (POBN). The order of the HAuCl4 decrease was DMPO > PDMPO > M4PO. The reaction was depressed by the addition of chloride or hydroxide ions. 1-Hydroxy-5,5-dimethyl-1-pyrrolid-2-one (HDMPN), the precursor of DMPOX, was also oxidized to DMPOX by HAuCl4. Every step of the gold reduction from Au(III) to Au(0) can be used for the oxidation of HDMPN to DMPOX. Based on these and previous results, the reaction was assumed to proceed by the following scheme consisting of a ligand exchange interaction of AuCl4– with >N+–O– in DMPO, then nucleophilic addition of a water molecule to DMPO, then the stepwise intramolecular transfer of three electrons from DMPO to Au(III), and finally the precipitation of Au(0). Key words: ESR, nitrone, spin traps, DMPO, DMPOX, gold(III) ion.
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Mostafa, Reham M., and Heba S. Essawy. "Assessment of camel thorn (Alhagi maurorum) as new sources of bioactive compounds using GC-MS technique." APRIL 2019, no. 12(01): 2019 (April 20, 2019): 70–77. http://dx.doi.org/10.21475/poj.12.01.19.pt1971.

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Alhagi maurorum (A. maurorum) is one of the medicinally important plants belonging to the family leguminasae, commonly known as camel thorn. This research was amid to identify the chemical compounds in the aerial part of A. maurorum using GC-mass analysis. Three solvents with different polarities were used for the extraction of chemical constituents (water, methanol and petroleum ether). The results of GC-MS analysis led to identification of various compounds. In total, thirty-nine compounds from petroleum ether extract, thirty-two compounds in methanolic extract and seventeen compounds in aqueous extract were identified. Majority of the identified compounds have been reported to possess many biological activities. Among them, we reported 10 new anticancer compounds (Vitamin E; Hexadecanoic acid; Stigmast-5-en-3-ol; Phytol,2-hexadecen-1-ol,3,7,11,15-tetramethyl; Squalene; Hexadecanoic acid; 2-hydroxy-1-(hydroxymethyl) ethyl ester; Oxime,methoxy-phenyl,methyl N-hydroxyben-zenecarboximidoate; Ergost-5-en-3-ol; 9,12- Octadecad-ienoic acid and Farnesol) from A. maurorum using three solvent, while the best effective solvent was petroluem ether. Therefore, we report that A. maurorum has great potential to be developed into anticancer drugs.
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7

Oparina, L. A., D. A. Shabalin, N. A. Kolyvanov, I. A. Ushakov, and B. A. Trofimov. "Noncatalytic Annulation of 4-Hydroxy-4-methylpent-2-ynenitrile to 3,3-Dimethyl-2-phenyl-3H-pyrrole. Stereoselective Synthesis of (Z)-2-(2,2,7,7-Tetramethyl-7a-phenyl-7,7a-dihydropyrrolo- [2,1-b]oxazol-3(2H)-ylidene)acetonitrile." Russian Journal of Organic Chemistry 54, no. 12 (December 2018): 1848–50. http://dx.doi.org/10.1134/s1070428018120217.

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8

Stabnikov, P. A., L. G. Bulusheva, N. I. Alferova, A. I. Smolentsev, I. A. Korol’kov, N. V. Pervukhina, and I. A. Baidina. "Crystal structures of 1,1,1-trifluoro-4-hydroxy-4-phenyl-but-3-en-2-one, 2,2,6,6-tetramethyl-3-hydroxy-hept-3-en-5-one, 2,2,6,6-tetramethyl-3-methylamino-hept-3-en-5-one and a study of the ability of these ligands to complex formation with metals." Journal of Structural Chemistry 53, no. 4 (July 2012): 740–47. http://dx.doi.org/10.1134/s0022476612040178.

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9

Santín, Efrén Pérez, Pierre Germain, Fabien Quillard, Harshal Khanwalkar, Fátima Rodríguez-Barrios, Hinrich Gronemeyer, Ángel R. de Lera, and William Bourguet. "Modulating Retinoid X Receptor with a Series of (E)-3-[4-Hydroxy-3-(3-alkoxy-5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-yl)phenyl]acrylic Acids and Their 4-Alkoxy Isomers†." Journal of Medicinal Chemistry 52, no. 10 (May 28, 2009): 3150–58. http://dx.doi.org/10.1021/jm900096q.

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10

Acosta, Lina M., Jorge Jurado, Alirio Palma, Justo Cobo, and Christopher Glidewell. "Five closely related 4-chloro-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepines: similar molecular structures but different supramolecular assemblies." Acta Crystallographica Section C Structural Chemistry 71, no. 12 (November 12, 2015): 1062–68. http://dx.doi.org/10.1107/s2053229615020811.

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Dibenz[b,f]azepine (DBA) is a privileged 6-7-6 tricyclic ring system of importance in both organic and medicinal chemistry. Benzo[b]pyrimido[5,4-f]azepines (BPAs), which also contain a privileged 6-7-6 ring system, are less well investigated, probably because of a lack of straightforward and versatile methods for their synthesis. A simple and versatile synthetic approach to BPAs based on intramolecular Friedel–Crafts alkylation has been developed. A group of closely-related benzo[b]pyrimido[5,4-f]azepine derivatives, namely (6RS)-4-chloro-6,11-dimethyl-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepine, C14H14ClN3, (I), (6RS)-4-chloro-8-hydroxy-6,11-dimethyl-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepine, C14H14ClN3O, (II), (6RS)-4-<!?tlsb=-0.14pt>chloro-8-methoxy-6,11-dimethyl-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepine, C15H16ClN3O, (III), and (6RS)-4-chloro-8-methoxy-6,11-dimethyl-2-phenyl-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepine, C21H20ClN3O, (IV), has been prepared and their structures compared with the recently published structure [Acosta-Quinteroet al.(2015).Eur. J. Org. Chem.pp. 5360–5369] of (6RS)-4-chloro-2,6,8,11-tetramethyl-6,11-dihydro-5H-benzo[b]pyrimido[5,4-f]azepine, (V). All five compounds crystallize as racemic mixtures and they have very similar molecular conformations, with the azepine ring adopting a boat-type conformation in each case, although the orientation of the methoxy substituent in each of (III) and (IV) is different. The supramolecular assemblies in (II) and (IV) depend upon hydrogen bonds of the O—H...N and C—H...π(arene) types, respectively, those in (I) and (V) depend upon π–π stacking interactions involving pairs of pyrimidine rings, and that in (III) depends upon a π–π stacking interaction involving pairs of phenyl rings. Short C—Cl...π(pyrimidine) contacts are present in (I), (II) and (IV) but not in (III) or (V).
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Dissertations / Theses on the topic "Methanediphosphanate(hydroxy phenyl o,o,o',o'-tetramethyl)"

1

Safsaf, Abdelaziz. "Etude structurale par diffraction des rayons x d'un phosphonate et de quelques hydroxydiphosphonates." Paris 13, 1989. http://www.theses.fr/1989PA132001.

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Pour les acides phosphoniques, diphosphoniques et diphosphonates organiques acides, la corrélation entre la longueur p-oh et la distance oh. . . O est linéaire. Les molécules d'éthanédiphosphonate-1,1 (hydroxy-1 "0,0,0',o'"-tetramethyl) et les molécules dérivées, possedent une relative flexibilité (corrélation linéaire entre l'angle p-c-p et le décalage des deux groupes acides phosphoniques)
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