Articles de revues : « Alkylamido »

1

Manke, David R., et Daniel G. Nocera. « Titanium bis(alkylamido)phenylborane complexes ». Inorganica Chimica Acta 345 (mars 2003) : 235–40. http://dx.doi.org/10.1016/s0020-1693(02)01352-x.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

2

Surles, Jefferson R., Susan Morris-Natschke, Michael H. Marx et Claude Piantadosi. « Multigram synthesis of 1-alkylamido phospholipids ». Lipids 28, n^o 1 (janvier 1993) : 55–57. http://dx.doi.org/10.1007/bf02536361.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

3

Makeiff, Darren A., Jae-Young Cho, Bradley Smith, Rina Carlini et Nicolas Godbert. « Self-Assembly of Alkylamido Isophthalic Acids toward the Design of a Supergelator : Phase-Selective Gelation and Dye Adsorption ». Gels 8, n^o 5 (5 mai 2022) : 285. http://dx.doi.org/10.3390/gels8050285.

Texte intégral

Résumé :

A new series of 5-alkylamido isophthalic acid (ISA) derivatives with varying single and twin alkyl chain lengths were designed and synthesized as potential supramolecular organogelators. 5-alkylamido ISAs with linear or branched alkyl tail-groups of different lengths were effective gelators for low polarity solvents. In particular, among the presented series, a derivative with a branched, 24 carbon atom tail-group behaves as a “supergelator” with up to twenty organic solvents forming gels that are highly stable over time. The gelation behavior was analyzed using Hansen solubility parameters, and the thermal stability and viscoelastic properties of select gels were characterized. Microscopy, spectroscopy, powder X-ray diffraction, and computer modeling studies were consistent with a hierarchical self-assembly process involving the formation of cyclic H-bonded hexamers via the ISA carboxylic acid groups, which stack into elementary fibers stabilized by H-bonding of the amide linker groups and π–π stacking of the aromatic groups. These new nanomaterials exhibited potential for the phase-selective gelation of oil from oil–water mixtures and dye uptake from contaminated water. The work expands upon the design and synthesis of supramolecular self-assembled nanomaterials and their application in water purification/remediation.

Styles APA, Harvard, Vancouver, ISO, etc.

4

Naka, Hiroshi, James V. Morey, Joanna Haywood, Dana J. Eisler, Mary McPartlin, Felipe García, Hironaga Kudo, Yoshinori Kondo, Masanobu Uchiyama et Andrew E. H. Wheatley. « Mixed Alkylamido Aluminate as a Kinetically Controlled Base ». Journal of the American Chemical Society 130, n^o 48 (3 décembre 2008) : 16193–200. http://dx.doi.org/10.1021/ja804749y.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

5

Perrone, Roberto, Francesco Berardi, Marcello Leopoldo, Vincenzo Tortorella, Maria Gioia Fornaretto, Carla Caccia et Robert A. McArthur. « 1-Aryl-4-[(1-tetralinyl)alkyl]piperazines : Alkylamido and Alkylamino Derivatives. Synthesis, 5-HT1AReceptor Affinity, and Selectivity. 31 ». Journal of Medicinal Chemistry 39, n^o 16 (janvier 1996) : 3195–202. http://dx.doi.org/10.1021/jm960087s.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

6

Malik, M. Azad, et P. O'Brien. « The properties of some volatile alkyl (di-alkylamido) zinc (11) and bis(di-alkylamido) zinc compounds : potential zinc precursors in MOCVD ». Polyhedron 16, n^o 20 (janvier 1997) : 3593–99. http://dx.doi.org/10.1016/s0277-5387(97)00116-2.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

7

Manke, David R., et Daniel G. Nocera. « Bis(alkylamido)phenylborane Complexes of Zirconium, Hafnium, and Vanadium ». Inorganic Chemistry 42, n^o 14 (juillet 2003) : 4431–36. http://dx.doi.org/10.1021/ic0340478.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

8

Atwood, David A., Alan H. Cowley et Richard A. Jones. « (Alkylamido)gallate complexes of Group I and II elements ». Organometallics 12, n^o 1 (janvier 1993) : 236–38. http://dx.doi.org/10.1021/om00025a040.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

9

Ohsedo, Yutaka, Makiko Taniguchi, Masashi Oono, Kowichiro Saruhashi et Hisayuki Watanabe. « Long-chain alkylamide-derived oil gels : mixing induced onset of thixotropy and application in sustained drug release ». New Journal of Chemistry 39, n^o 8 (2015) : 6482–90. http://dx.doi.org/10.1039/c5nj00999e.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

10

Huang, Huan-Ming, Yu-Jin Li, Yin-Ping Dai, Wu-Bin Yu, Qin Ye et Jian-Rong Gao. « Bifunctionalisation of 1,4-naphthoquinone by the Oxidative Addition of an Alkylamine and Iodine ». Journal of Chemical Research 37, n^o 1 (janvier 2013) : 34–37. http://dx.doi.org/10.3184/174751912x13547276507240.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

11

PERRONE, R., F. BERARDI, M. LEOPOLDO, V. TORTORELLA, M. G. FORNARETTO, C. CACCIA et R. A. MCARTHUR. « ChemInform Abstract : 1-Aryl-4-((1-tetralinyl)alkyl)piperazines : Alkylamido and Alkylamino Derivatives. Synthesis, 5-HT1A Receptor Affinity, and Selectivity. Part 3. » ChemInform 27, n^o 48 (4 août 2010) : no. http://dx.doi.org/10.1002/chin.199648171.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

12

Manke, David R., et Daniel G. Nocera. « Solid state aggregation of lithium and thallium(I) bis(alkylamido)phenylboranes ». Polyhedron 25, n^o 2 (janvier 2006) : 493–98. http://dx.doi.org/10.1016/j.poly.2005.08.021.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

13

Niinistö, Jaakko, Kaupo Kukli, Maarit Kariniemi, Mikko Ritala, Markku Leskelä, Nicolas Blasco, Audrey Pinchart et al. « Novel mixed alkylamido-cyclopentadienyl precursors for ALD of ZrO2 thin films ». Journal of Materials Chemistry 18, n^o 43 (2008) : 5243. http://dx.doi.org/10.1039/b810922b.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

14

Schmidt, Eva Susanne, Alexander Jockisch et Hubert Schmidbaur. « Isomerism of dimeric cis-ethene-1,2-di(alkylamido)gallium hydrides and chlorides ». Journal of the Chemical Society, Dalton Transactions, n^o 7 (2000) : 1039–43. http://dx.doi.org/10.1039/a909198j.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

15

Otang, Mathew E., David Josephson, Todd Duppong et Lothar Stahl. « The chameleonic reactivity of dilithio bis(alkylamido)cyclodiphosph(iii)azanes with chlorophosphines ». Dalton Transactions 47, n^o 33 (2018) : 11625–35. http://dx.doi.org/10.1039/c8dt02087f.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

16

Savarino, Piero, Guido Viscardi, Ermanno Barni et Rosarina Carpignano. « Heterocyclic monoazo dyes for polyamide, derived from 4-alkylamido-2-hydroxybenzoic acids ». Dyes and Pigments 9, n^o 4 (janvier 1988) : 295–304. http://dx.doi.org/10.1016/0143-7208(88)85018-6.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

17

Ohsedo, Yutaka, Masashi Oono, Kowichiro Saruhashi et Hisayuki Watanabe. « N-Alkylamido-d-glucamine-based gelators for the generation of thixotropic gels ». RSC Adv. 4, n^o 89 (2014) : 48554–58. http://dx.doi.org/10.1039/c4ra08346f.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

18

Ma, Yao, Lu Tian, Xiaona Wang, Chen Huang, Mingjing Tian et Anzhi Wei. « Alkylamide Profiling of Pericarps Coupled with Chemometric Analysis to Distinguish Prickly Ash Pericarps ». Foods 10, n^o 4 (15 avril 2021) : 866. http://dx.doi.org/10.3390/foods10040866.

Texte intégral

Résumé :

Because of extensive cultivation areas, various cultivars, nonstandard naming notations, and morphology similarity among relative cultivars, adulteration and associated business fraud may happen in the marketplaces of prickly ash pericarps due to higher financial gain and high-frequency trading. This study presents variations in the chemical components and contents of different prickly ash species from different plantations. Alkylamide profiling of pericarps derived from Zanthoxylum armatum, Z. bungeanum, and some relative Zanthoxylum species from 72 plantations across China were tested using ultra-performance liquid chromatography. Then, several chemometrics were applied to classify the prickly ash pericarps to reveal potential indicators that distinguish prickly ash pericarps and to identify the key factors that affect pericarp alkylamide profiling. The dominating alkylamides in the prickly ash pericarps were Z. piperitum (ZP)-amide C (0–20.64 mg/g) and ZP-amide D (0–30.43 mg/g). Alkylamide profiling of prickly ash pericarps varied significantly across species and geographical variations. ZP-amide D in prickly ash pericarps was identified as a potential indicator to distinguish prickly ash species. Longitude and aluminum content in soils were identified as key factors that affected alkylamide profiling of prickly ash pericarps. This study provides a useful tool to classify prickly ash species based on pericarp alkylamide profiling and to determine the key influence factors on pericarp alkylamide variations.

Styles APA, Harvard, Vancouver, ISO, etc.

19

KASHIWADA, Yoshiki, Junko CHIYO, Yasumasa IKESHIRO, Tsuneatsu NAGAO, Hikaru OKABE, L. Mark COSENTINO, Keith FOWKE, Susan L. MORRIS-NATSCHKE et Kuo-Hsiung LEE. « Synthesis and Anti-HIV Activity of 3-Alkylamido-3-deoxy-betulinic Acid Derivatives. » CHEMICAL & ; PHARMACEUTICAL BULLETIN 48, n^o 9 (2000) : 1387–90. http://dx.doi.org/10.1248/cpb.48.1387.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

20

Pham, John W., Ishwar Radhakrishnan et Erik J. Sontheimer. « Thermodynamic and structural characterization of 2′-nitrogen-modified RNA duplexes ». Nucleic Acids Research 32, n^o 11 (1 janvier 2004) : 3446–55. http://dx.doi.org/10.1093/nar/gkh658.

Texte intégral

Résumé :

Abstract 2′-aminonucleosides are commonly used as sites of post-synthetic chemical modification within nucleic acids. As part of a larger cross-linking strategy, we appended alkyl groups onto the N2′ position of 2′-amino-modified RNAs via 2′-ureido and 2′-amido linkages. We have characterized the thermodynamics of 2′-amino, 2′-alkylamido and 2′-alkylureido-modified RNA duplexes and show that 2′-ureido-modified RNAs are significantly more stable than analogous 2′-amido-modified RNAs. Using NMR spectroscopy and NMR-based molecular modeling of 2′-modified RNA duplexes, we examined the effects that 2′-nitrogen modifications have on RNA helices. Our data suggest that the 2′-ureido group forms a specific intra-nucleoside interaction that cannot occur within 2′-amido-modified helices. These results indicate that 2′-ureido modifications are superior to analogous 2′-amido ones for applications that require stable base pairing.

Styles APA, Harvard, Vancouver, ISO, etc.

21

Hamilton, Harriet W., Bradley D. Tait, Christopher Gajda, Susan E. Hagen, Donna Ferguson, Elizabeth A. Lunney, Alexander Pavlovsky et Peter J. Tummino. « 6-Phenyl-6-alkylamido-5,6-dihydro-2H-pyran-2-ones : novel HIV protease inhibitors ». Bioorganic & ; Medicinal Chemistry Letters 6, n^o 6 (mars 1996) : 719–24. http://dx.doi.org/10.1016/0960-894x(96)00099-6.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

22

Barni, Ermanno, Piero Savarino, Rosarina Carpignano, Raffaella Larovere et Giacomo Giraudo. « Monoazo dyes for polyamide derived from 2-(4-alkylamido-2-hydroxyphenyl)benz-X-azoles ». Dyes and Pigments 6, n^o 2 (1985) : 83–97. http://dx.doi.org/10.1016/0143-7208(85)80009-7.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

23

Shangguan, Guoqiang, Shugong Zhang, Jiazuan Ni et Yuxiu Nie. « SYNTHESIS,STRUCTURE AND ANTITUMOR ACTIVITY OF β-ALKYLAMIDO-ETHYL(OR ISOPROPYL)GERMANIUM SESQUIOXIDE ». Chinese Journal of Applied Chemistry 8, n^o 1 (1 février 1991) : 88–91. http://dx.doi.org/10.3724/j.issn.1000-0518.1991.1.88.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

24

Shangguan, Guoqiang, Shugong Zhang, Jiazuan Ni et Yuxiu Nie. « SYNTHESIS,STRUCTURE AND ANTITUMOR ACTIVITY OF β-ALKYLAMIDO-ETHYL(OR ISOPROPYL)GERMANIUM SESQUIOXIDE ». Chinese Journal of Applied Chemistry 8, n^o 1 (1 février 1991) : 88–91. http://dx.doi.org/10.3724/j.issn.1000-0518.1991.1.8891.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

25

DIAMANTINI, G., G. SPADONI, A. SALVATORI, E. DURANTI et R. PESCARDOR. « ChemInform Abstract : 7-Substituted Theophyllines. Part 6. N-(2-(4-Chlorophenoxy)-1- phenylalkyl)alkylamido Derivatives. » ChemInform 22, n^o 12 (23 août 2010) : no. http://dx.doi.org/10.1002/chin.199112332.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

26

Knott, Jackson P., Mikko M. Hänninen, J. Mikko Rautiainen, Heikki M. Tuononen et Paul G. Hayes. « Insights into the decomposition pathway of a lutetium alkylamido complex via intramolecular C–H bond activation ». Journal of Organometallic Chemistry 845 (septembre 2017) : 135–43. http://dx.doi.org/10.1016/j.jorganchem.2017.04.008.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

27

Consiglio, Steven, Filippos Papadatos, Sebastian Naczas, Spyridon Skordas, Eric T. Eisenbraun et Alain E. Kaloyeros. « Metallorganic Chemical Vapor Deposition of Hafnium Silicate Thin Films Using a Dual Source Dimethyl-alkylamido Approach ». Journal of The Electrochemical Society 153, n^o 11 (2006) : F249. http://dx.doi.org/10.1149/1.2338634.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

28

HAMILTON, H. W., B. D. TAIT, C. GAJDA, S. E. HAGEN, D. FERGUSON, E. A. LUNNEY, A. PAVLOVSKY et P. J. TUMMINO. « ChemInform Abstract : 6-Phenyl-6-alkylamido-5,6-dihydro-2H-pyran-2-ones : Novel HIV Protease Inhibitors. » ChemInform 27, n^o 29 (5 août 2010) : no. http://dx.doi.org/10.1002/chin.199629152.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

29

Wang, Bo, An-Jun Deng, Zhi-Hong Li, Nan Wang et Hai-Lin Qin. « Syntheses and Structure–Activity Relationships in Growth Inhibition Activity against Human Cancer Cell Lines of 12 Substituted Berberine Derivatives ». Molecules 25, n^o 8 (18 avril 2020) : 1871. http://dx.doi.org/10.3390/molecules25081871.

Texte intégral

Résumé :

In this study, quaternary berberine chloride is used as a lead compound to design and synthesize a series of berberine-12-amine derivatives to evaluate the growth inhibition activity against human cancer cell lines. Forty-two compounds of several series were obtained. The quaternary berberine-12-N,N-di-n-alkylamine chlorides showed the targeted activities with the IC50 values of most active compounds being dozens of times those of the positive control. A significant structure–activity relationship (SAR) was observed. The activities of quaternary berberine-12-N,N-di-n-alkylamine chlorides are significantly stronger than those of the reduced counterparts. In the range of about 6-8 carbon atoms, the activities increase with the elongation of n-alkyl carbon chain of 12-N,N-di-n-alkylamino, and when the carbon atom numbers are more than 6-8, the activities decrease with the elongation of n-alkyl carbon chain. The activities of the tertiary amine structure are significantly higher than that of the secondary amine structure.

Styles APA, Harvard, Vancouver, ISO, etc.

30

Syntsya, A., J. Čpíková, M. Marounek, P. Mlčochová, L. Sihelková, P. Blafková, M. Tkadlecová et J. Havlíček. « Preparation of N-alkylamides of highly methylated (HM) citrus pectin ». Czech Journal of Food Sciences 21, No. 5 (18 novembre 2011) : 162–66. http://dx.doi.org/10.17221/3494-cjfs.

Texte intégral

Résumé :

N-Alkylamides of highly methylated (HM) citrus pectin (DM = 73%) were prepared using heterogeneous amino-de-alkoxylation (aminolysis) with five selected n-alkylamines. The reaction was carried out in N,N-dimethylformamide at 8°C (n-butylamine), 25°C (n-hexylamine), and 45°C (n-octylamine, n-dodecylamine and n-octadecylamine). All the derivatives were converted into acid forms by washing with acidic water-ethanol mixture. The products were analysed by organic elemental analysis, diffusion reflection FT-IR spectroscopy and by 13C CP/MAS NMR. Both FT-IR and NMR spectra indicate the presence of alkylamide substituents bound to pectin. The degrees of amidation (DA) of the derivatives and molar and mass reaction yields (Ymand Yn) were calculated based on the results of elemental analysis. The DA values of the N-alkylamides were 39–55% that corresponded to Ynof 54–75%.

Styles APA, Harvard, Vancouver, ISO, etc.

31

Nakayama, Yuushou, Yuuichi Sogo, Ryo Tanaka, Zhengguo Cai et Takeshi Shiono. « Copolymerization of Ethylene with Isobutylene and Limonene Catalyzed by Titanium Complexes with Various ansa-(Fluorenyl)(alkylamido) Ligand ». Engineering Journal 17, n^o 5 (31 décembre 2013) : 13–18. http://dx.doi.org/10.4186/ej.2013.17.5.13.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

32

Sut, Stefania, Irene Ferrarese, Shyam Sharan Shrestha, Gourav Kumar, Antonio Slaviero, Simone Sello, Adriano Altissimo, Luca Pagni, Francesco Gattesco et Stefano Dall’Acqua. « Comparison of Biostimulant Treatments in Acmella oleracea Cultivation for Alkylamides Production ». Plants 9, n^o 7 (29 juin 2020) : 818. http://dx.doi.org/10.3390/plants9070818.

Texte intégral

Résumé :

Acmella oleracea is a promising cosmetic, nutraceutical, and pharmaceutical ingredient, and plants with high levels of active compounds are needed in the market. Cultivation can be valuable if sufficient levels of alkylamides are present in plant material. In this regard the application of biostimulants can be an innovative approach to increase yield of cultivation or bioactive compound levels. A. oleracea plants were cultivated in Northern Italy in an experimental site using three different types of biostimulants, triacontanol-based mixture (Tria), an extract from plant tissues (LL017), and seaweed extract (Swe). Plants were grown in the field in two different growing seasons (2018 and 2019). After treatments inflorescences were harvested and the quali-quantitative analysis of alkylamides and polyphenols was performed. Treated and control plants were compared for yields, morphometric measurements, quali-quantitative composition in secondary metabolites. Overall results show that both triacontanol-based mixture and the LL017 positively influenced plant growth (Tria >+ 22%; LL017 >+ 25%) and flower production (Tria >+ 34%; LL017 >+ 56%). The amount of alkylamides and polyphenols in flowers were between 2.0–5.2% and 0.03–0.50%, respectively. Biostimulant treatments ensure higher cultivation yields and allow maintenance of the alkylamide and polyphenol levels based on % (w/w), thus offering an advantage in the final quantity of extractable chemicals. Furthermore, data revealed that samples harvested in late season show a decrease of polyphenols.

Styles APA, Harvard, Vancouver, ISO, etc.

33

Fondong, Gregory L., Edmond Y. Njua et Lothar Stahl. « Di(alkylamido)zirconium dichlorides and tri(arylamido)zirconium monochlorides having hemilabile N, O ligands and their methyl derivatives ». Journal of Organometallic Chemistry 776 (janvier 2015) : 129–35. http://dx.doi.org/10.1016/j.jorganchem.2014.11.012.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

34

Ouyang, Hui, Susan L. Morris-Natschke, Khalid S. Ishaq, Peter Ward, Dongzhou Liu, Sarah Leonard et Dhiren R. Thakker. « Structure−Activity Relationship for Enhancement of Paracellular Permeability across Caco-2 Cell Monolayers by 3-Alkylamido-2-alkoxypropylphosphocholines ». Journal of Medicinal Chemistry 45, n^o 13 (juin 2002) : 2857–66. http://dx.doi.org/10.1021/jm020001x.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

35

Sarkar, Anitha, Stephen Potts, Simon Rushworth, Fred Roozeboom, M. C. M. Van de Sanden et W. M. M. Kessels. « Plasma-Enhanced ALD of TiO2 Using a Novel Cyclopentadienyl Alkylamido Precursor [Ti(CpMe)(NMe2)3] and O2 Plasma ». ECS Transactions 33, n^o 2 (17 décembre 2019) : 385–93. http://dx.doi.org/10.1149/1.3485274.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

36

Driver, Michael S., et John F. Hartwig. « A Rare, Low-Valent Alkylamido Complex, a Diphenylamido Complex, and Their Reductive Elimination of Amines by Three-Coordinate Intermediates ». Journal of the American Chemical Society 117, n^o 16 (avril 1995) : 4708–9. http://dx.doi.org/10.1021/ja00121a030.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

37

EWING, D. F., J. W. GOODBY, J. A. HALEY, S. M. KELLY, P. LETELLIER et G. MACKENZIE. « N-Acyl-beta-D-glycopyranosylamines and 2-alkylamido-2- deoxy-alpha / beta-D-glucopyranoses : relationship between molecular structure and mesomorphism ». Liquid Crystals 23, n^o 5 (novembre 1997) : 759–69. http://dx.doi.org/10.1080/026782997208037.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

38

Kashiwada, Yoshiki, Junko Chiyo, Yasumasa Ikeshiro, Tsuneatsu Nagao, Hikaru Okabe, L. Mark Cosentino, Keith Fowke, Susan L. Morris-Natschke et Kuo-Hsiung Lee. « ChemInform Abstract : Anti-AIDS Agents. Part 43. Synthesis and Anti-HIV Activity of 3-Alkylamido-3-deoxy-betulinic Acid Derivatives. » ChemInform 32, n^o 5 (30 janvier 2001) : no. http://dx.doi.org/10.1002/chin.200105159.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

39

Vieira, Sara F., Samuel M. Gonçalves, Virgínia M. F. Gonçalves, Carmen P. Llaguno, Felipe Macías, Maria Elizabeth Tiritan, Cristina Cunha et al. « Echinacea purpurea Fractions Represent Promising Plant-Based Anti-Inflammatory Formulations ». Antioxidants 12, n^o 2 (9 février 2023) : 425. http://dx.doi.org/10.3390/antiox12020425.

Texte intégral

Résumé :

Echinacea purpurea is traditionally used in the treatment of inflammatory diseases. Therefore, we investigated the anti-inflammatory capacity of E. purpurea dichloromethanolic (DE) and ethanolic extracts obtained from flowers and roots (R). To identify the class of compounds responsible for the strongest bioactivity, the extracts were fractionated into phenol/carboxylic acid (F1) and alkylamide fraction (F2). The chemical fingerprint of bioactive compounds in the fractions was evaluated by LC-HRMS. E. purpurea extracts and fractions significantly reduced pro-inflammatory cytokines (interleukin 6 and/or tumor necrosis factor) and reactive oxygen and nitrogen species (ROS/RNS) production by lipopolysaccharide-stimulated primary human monocyte-derived macrophages. Dichloromethanolic extract obtained from roots (DE-R) demonstrated the strongest anti-inflammatory activity. Moreover, fractions exhibited greater anti-inflammatory activity than whole extract. Indeed, alkylamides must be the main compounds responsible for the anti-inflammatory activity of extracts; thus, the fractions presenting high content of these compounds presented greater bioactivity. It was demonstrated that alkylamides exert their anti-inflammatory activity through the downregulation of the phosphorylation of p38, ERK 1/2, STAT 3, and/or NF-κB signaling pathways, and/or downregulation of cyclooxygenase 2 expression. E. purpurea extracts and fractions, mainly DE-R-F2, are promising and powerful plant-based anti-inflammatory formulations that can be further used as a basis for the treatment of inflammatory diseases.

Styles APA, Harvard, Vancouver, ISO, etc.

40

Willick, Ian R., Branka Barl et Karen K. Tanino. « Effect of latitude on narrow-leaved purple coneflower (Echinacea angustifolia DC.) yield and phytochemical quality ». Canadian Journal of Plant Science 100, n^o 1 (1 février 2020) : 103–12. http://dx.doi.org/10.1139/cjps-2019-0030.

Texte intégral

Résumé :

The worldwide increase in demand for plant-derived drugs has increased interest in medicinal plants as alternative cash crops across western Canada. The objective of this research was to determine if the Northern Vigor® phenomenon, expressed as a combination of elevated crop yield and phytomedicinal quality in crops grown in northern latitudes, exists in narrow-leaved purple coneflower (Echinacea angustifolia DC.). In a 2-yr study, narrow-leaved purple coneflower was grown in three field sites in Saskatchewan, Canada (SK; Saskatoon, La Ronge, and Outlook) and one field site in Oregon, United States (Madras), to test the effects of latitude on root yield, phenolic, and alkylamide phytochemical markers. Roots harvested in 1999 (all three SK sites) and 2000 (two SK sites) had higher root biomass compared with roots harvested in Oregon. Root echinacoside and cynarin content were significantly higher in both years in the three Saskatchewan sites compared with Madras, whereas root chlorogenic acid content and total alkylamides were significantly higher in all three Saskatchewan sites in 1999. In 2000, root chlorogenic acid content and total alkylamides were higher in two of the three Saskatchewan sites compared with Madras. While Aster Yellows were prevalent in Echinacea in Saskatchewan, this disease did not significantly decrease root yield phenolic or phytochemical content. These data suggest that Saskatchewan has a competitive advantage in producing premium-quality narrow-leaved purple coneflower root in North America.

Styles APA, Harvard, Vancouver, ISO, etc.

41

Kwon, Su Jin, Jun Won Baek, Hyun Ju Lee, Tae Jin Kim, Ji Yeon Ryu, Junseong Lee, Eun Ji Shin, Ki Soo Lee et Bun Yeoul Lee. « Preparation of Pincer Hafnium Complexes for Olefin Polymerization ». Molecules 24, n^o 9 (29 avril 2019) : 1676. http://dx.doi.org/10.3390/molecules24091676.

Texte intégral

Résumé :

Pincer-type [Cnaphthyl, Npyridine, Namido]HfMe2 complex is a flagship among the post-metallocene catalysts. In this work, various pincer-type Hf-complexes were prepared for olefin polymerization. Pincer-type [Namido, Npyridine, Namido]HfMe2 complexes were prepared by reacting in situ generated HfMe4 with the corresponding ligand precursors, and the structure of a complex bearing 2,6-Et2C6H3Namido moieties was confirmed by X-ray crystallography. When the ligand precursors of [(CH3)R2Si-C5H3N-C(H)PhN(H)Ar (R = Me or Ph, Ar = 2,6-diisopropylphenyl) were treated with in situ generated HfMe4, pincer-type [Csilylmethyl, Npyridine, Namido]HfMe2 complexes were afforded by formation of Hf-CH2Si bond. Pincer-type [Cnaphthyl, Sthiophene, Namido]HfMe2 complex, where the pyridine moiety in the flagship catalyst was replaced with a thiophene unit, was not generated when the corresponding ligand precursor was treated with HfMe4. Instead, the [Sthiophene, Namido]HfMe3-type complex was obtained with no formation of the Hf-Cnaphthyl bond. A series of pincer-type [Cnaphthyl, Npyridine, Nalkylamido]HfMe2 complexes was prepared where the arylamido moiety in the flagship catalyst was replaced with alkylamido moieties (alkyl = iPr, cyclohexyl, tBu, adamantyl). Structures of the complexes bearing isopropylamido and adamantylamido moieties were confirmed by X-ray crystallography. Most of the complexes cleanly generated the desired ion-pair complexes when treated with an equivalent amount of [(C18H37)2N(H)Me]+[B(C6F5)4]−, which showed negligible activity in olefin polymerization. Some complexes bearing bulky substituents showed moderate activities, even though the desired ion-pair complexes were not cleanly afforded.

Styles APA, Harvard, Vancouver, ISO, etc.

42

Zhu, Yinghuai, Kamesh Vyakaranam, John A. Maguire, William Quintana, Francesc Teixidor, Clara Viñas et Narayan S. Hosmane. « The first half-sandwich d0-metallacarboranes stabilized by metal–nitrogen sigma bond using C(cage)-appended anionic alkylamido moiety : a synthetic investigation ». Inorganic Chemistry Communications 4, n^o 9 (septembre 2001) : 486–89. http://dx.doi.org/10.1016/s1387-7003(01)00256-8.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

43

Louie, Janis, Frédéric Paul et John F. Hartwig. « Catalysis with Platinum-Group Alkylamido Complexes. The Active Palladium Amide in Catalytic Aryl Halide Aminations As Deduced from Kinetic Data and Independent Generation ». Organometallics 15, n^o 12 (janvier 1996) : 2794–805. http://dx.doi.org/10.1021/om960188o.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

44

Maslar, James E., William A. Kimes, Brent A. Sperling et Ravindra K. Kanjolia. « Nondispersive Infrared Gas Analyzer for Partial Pressure Measurements of a Tantalum Alkylamide During Vapor Deposition Processes ». Applied Spectroscopy 74, n^o 10 (24 août 2020) : 1219–29. http://dx.doi.org/10.1177/0003702819885182.

Texte intégral

Résumé :

A nondispersive infrared gas analyzer was demonstrated for investigating metal alkylamide precursor delivery for microelectronics vapor deposition processes. The nondispersive infrared analyzer was designed to simultaneously measure the partial pressure of pentakis(dimethylamido) tantalum, a metal precursor employed in high volume manufacturing vapor deposition processes to deposit tantalum nitride, and dimethylamine, the primary decomposition product of pentakis(dimethylamido) tantalum at typical delivery conditions for these applications. This sensor was based on direct absorption of pentakis(dimethylamido) tantalum and dimethylamine in the fingerprint spectral region. The nondispersive infrared analyzer optical response was calibrated by measuring absorbance as a function of dimethylamine and pentakis(dimethylamido) tantalum density. The difference between the mass of material removed from the ampoule during flow tests as measured gravimetrically and as determined optically, by calculating flow rates from the nondispersive infrared analyzer measurements, was only ≈2 %. The minimum detectable molecular densities for pentakis(dimethylamido) tantalum and dimethylamine were ≈2 × 1013 cm−3 and ≈5 × 1014 cm−3, respectively (with no signal averaging and for a sampling rate of 200 Hz), and the corresponding partial pressures were ≈0.1 Pa and ≈2 Pa for pentakis(dimethylamido) tantalum and dimethylamine, respectively (for an optical flow cell temperature of 93 ℃). Pentakis(dimethylamido) tantalum could be detected at all conditions of this investigation and likely the majority of conditions relevant to high volume manufacturing tantalum nitride deposition. Dimethylamine was not detected at all conditions in this study, because of a lower nondispersive infrared analyzer sensitivity to dimethylamine compared to pentakis(dimethylamido) tantalum and because conditions of this study were selected to minimize DMA production. While this nondispersive infrared gas analyzer was specifically developed for pentakis(dimethylamido) tantalum and dimethylamine, it is suitable for characterizing the vapor delivery of other metal alkylamide precursors and the corresponding amine decomposition products, although in the case of some metal alkylamides a different bandpass filter would be required.

Styles APA, Harvard, Vancouver, ISO, etc.

45

Grocholl, Luke, Lothar Stahl et Richard J. Staples. « Syntheses and single-crystal X-ray structures of [(ButNP)2(ButN)2]MCl2 (M = Zr, Hf) : the first transition-metal bis(alkylamido)cyclodiphosphazane complexes ». Chemical Communications, n^o 15 (1997) : 1465–66. http://dx.doi.org/10.1039/a702606d.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

46

Curtis, Neil F., et Ward T. Robinson. « Compounds of some alkylamido-substituted cyclic tetraamines with copper(II) : The structure of di(perchlorato)RRSS(trans-(6,13-bis(ethylamido)-6,13-dimethyl-1,4,8,11-tetraazacyclotetradecane)copper(II) ». Polyhedron 24, n^o 8 (juin 2005) : 976–78. http://dx.doi.org/10.1016/j.poly.2005.03.013.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

47

Al-rawi, Jasim M. A., et Naceur Ayed. « Carbon-13 chemical shift assignment of some organophosphorus compounds. Part 3. Diaryl-, dialkoxy- and dihalo-(alkylamido or arylamido) phosphorus derivatives with general formula Y2P(X)NHR ». Magnetic Resonance in Chemistry 23, n^o 4 (avril 1985) : 285–88. http://dx.doi.org/10.1002/mrc.1260230416.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

48

Tafuku, Sayaka, Takuya Fukuda, Kazuhiro Chiba et Yoshikazu Kitano. « A New Method for the Preparation of Bis(alkylamino)maleonitriles from Aliphatic Isocyanides with TMSCN and Bi(OTf)3 ». Synthesis 51, n^o 11 (11 mars 2019) : 2318–22. http://dx.doi.org/10.1055/s-0037-1610865.

Texte intégral

Résumé :

Bis(alkylamino)maleonitriles are starting materials for the synthesis of a number of important intermediates, including porphyrazines that serve as dyes, pigments, and models of biologically active substances; hence, the development of improved methods for their preparation is important. Herein, we report a facile new method for the preparation of bis(alkylamino)maleonitriles from isocyanides. Treatment of tert-alkyl isocyanides with trimethylsilyl cyanide (TMSCN) and trimethylsilyl triflate (TMSOTf) in the presence of bismuth(III) triflate [Bi(OTf)3] afforded the corresponding bis(alkylamino)maleonitriles in moderate yields. tert-Alkyl isocyanides bearing a variety of functional groups, including halide, ether, ester, imide, amide, and carbamate, are tolerated under the developed reaction conditions. To the best of our knowledge, this is the first report of a synthetic method for the preparation of bis(alkylamino)maleonitriles in a single step from tertiary alkyl isocyanides.

Styles APA, Harvard, Vancouver, ISO, etc.

49

EH-Haj, Babiker M. « Metabolic N-Dealkylation and N-Oxidation as Elucidators of the Role of Alkylamino Moieties in Drugs Acting at Various Receptors ». Molecules 26, n^o 7 (29 mars 2021) : 1917. http://dx.doi.org/10.3390/molecules26071917.

Texte intégral

Résumé :

Metabolic reactions that occur at alkylamino moieties may provide insight into the roles of these moieties when they are parts of drug molecules that act at different receptors. N-dealkylation of N,N-dialkylamino moieties has been associated with retaining, attenuation or loss of pharmacologic activities of metabolites compared to their parent drugs. Further, N-dealkylation has resulted in clinically used drugs, activation of prodrugs, change of receptor selectivity, and providing potential for developing fully-fledged drugs. While both secondary and tertiary alkylamino moieties (open chain aliphatic or heterocyclic) are metabolized by CYP450 isozymes oxidative N-dealkylation, only tertiary alkylamino moieties are subject to metabolic N-oxidation by Flavin-containing monooxygenase (FMO) to give N-oxide products. In this review, two aspects will be examined after surveying the metabolism of representative alkylamino-moieties-containing drugs that act at various receptors (i) the pharmacologic activities and relevant physicochemical properties (basicity and polarity) of the metabolites with respect to their parent drugs and (ii) the role of alkylamino moieties on the molecular docking of drugs in receptors. Such information is illuminative in structure-based drug design considering that fully-fledged metabolite drugs and metabolite prodrugs have been, respectively, developed from N-desalkyl and N-oxide metabolites.

Styles APA, Harvard, Vancouver, ISO, etc.

50

Musil, Zbynek, Petr Zimcik, Miroslav Miletin, Kamil Kopecky, Marek Link, Pavel Petrik et Jan Schwarz. « Synthesis and singlet oxygen production of azaphthalocyanines bearing functional derivatives of carboxylic acid ». Journal of Porphyrins and Phthalocyanines 10, n^o 02 (février 2006) : 122–31. http://dx.doi.org/10.1142/s1088424606000156.

Texte intégral

Résumé :

New metal-free, magnesium and zinc azaphthalocyanines ( AzaPc ) were prepared from 6-(3-tert-butylsulfany1-5,6-dicyanopyrazine-2-ylamino)hexanoic acid and its butylester and N,N-diethylamide. Their singlet oxygen production was measured by a dye-sensitized photooxidation of 1,3-diphenylisobenzofuran ( DPBF ) and ΦΔ values were calculated. It was found that the presence of carboxylic acid in the structure of AzaPc decreases their singlet oxygen production. Singlet oxygen activity of the newly prepared compounds (containing mixed alkylamino and alkylsulfanyl peripheral substituents) lies between purely alkylsulfanyl and alkylamino derivatives of AzaPc . This fact further supports previously proposed structure-activity relationships, where alkylsulfanyl derivatives belong to the best singlet oxygen producers while the presence of alkylamino substituents in the structure rapidly decreases their photodynamic properties.

Styles APA, Harvard, Vancouver, ISO, etc.

Articles de revues sur le sujet « Alkylamido »

Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres