Log in

Relevant bibliographies by topics / Allyl transfer reactions

Contents

Journal articles
Dissertations / Theses
Book chapters
Conference papers
Reports

Academic literature on the topic 'Allyl transfer reactions'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Allyl transfer reactions.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Allyl transfer reactions"

1

Easton, Christopher J., and Ilse M. Scharfbillig. "Homolytic allyl transfer reactions of 1- and 3-alkyl-substituted allyltributylstannanes." Journal of Organic Chemistry 55, no. 1 (January 1990): 384–86. http://dx.doi.org/10.1021/jo00288a076.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Lee, Ikchoon, Chang Kon Kim, and Bon-Su Lee. "Theoretical studies of the identity allyl transfer reactions." Journal of Physical Organic Chemistry 8, no. 7 (July 1995): 473–83. http://dx.doi.org/10.1002/poc.610080706.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Lee, Ikchoon, Chang Kon Kim, and Bon-Su Lee. "Ab initio molecular orbital studies of nonidentity allyl transfer reactions." Journal of Computational Chemistry 16, no. 8 (August 1995): 1045–54. http://dx.doi.org/10.1002/jcc.540160811.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Arisawa, Mieko, and Masahiko Yamaguchi. "Transition-metal-catalyzed synthesis of organosulfur compounds." Pure and Applied Chemistry 80, no. 5 (January 1, 2008): 993–1003. http://dx.doi.org/10.1351/pac200880050993.

Full text

Abstract:

Rhodium complexes are efficient catalysts for the synthesis of organosulfur compounds. They catalyze the addition reaction of organosulfur groups to unsaturated compounds, the substitution of C-H with organosulfur groups, and single-bond metathesis reactions. They cleave S-S bonds and transfer the organosulfur groups to various organic and inorganic molecules, including alkynes, allenes, disulfides, sulfur, isonitriles, imines, diphosphines, thiophosphinites, hydrogen, 1-alkylthio-1-alkynes, thioesters, and allyl sulfides.

APA, Harvard, Vancouver, ISO, and other styles

5

Pitteloud, Jean-Philippe, Yong Liang, and Stanislaw F. Wnuk. "Chemoselective Transfer of Allyl or Phenyl Group from Allyl(phenyl)germanes in Pd-catalyzed Reactions with Aryl Halides." Chemistry Letters 40, no. 9 (September 5, 2011): 967–69. http://dx.doi.org/10.1246/cl.2011.967.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Morais, Latino Loureiro, Hideya Yuasa, Khalil Bennis, Isabelle Ripoche, and France-Isabelle Auzanneau. "Chemoenzymatic synthesis of thio-nod factor intermediates Enzymatic transfer of glucosamine on thiochitobiose derivatives." Canadian Journal of Chemistry 84, no. 4 (April 1, 2006): 587–96. http://dx.doi.org/10.1139/v06-043.

Full text

Abstract:

The chemoenzymatic syntheses of thioanalogues of nodulation factors in which the nonreducing end glucosamine residue is available for the introduction of the fatty acid moiety at the free NH2 group are reported. We are describing the chemical synthesis of UDP-GlcNH2 and its use in the enzymatic transfer of GlcNH2 by the bovine galactosyltransferase (EC 2.4.1.90) onto O-4 of the nonreducing end N-acetylglucosamine residues of chitobiose, thiochitobiose, and allyl thiochitobioside. The enzymatic reactions on chitobiose and thiochitobiose were followed by TLC and MALDI MS and showed about 50% conversion of the disaccharides to the desired products. However, these reducing trisaccharides could not be obtained totally free of salts and degraded on ion exchange chromatography. Thus, we investigated the enzymatic transfer on the nonreducing allyl thiochitobioside analogue. We describe here the chemical synthesis of this thiodisaccharide and the enzymatic transfer of GlcNH2 at O-4 of its nonreducing end glucosamine residue to give the desired allyl thiotrisaccharide. This thiotrisaccharide was obtained pure in 41% yield and was characterized by 1H NMR (HSQC) and HRMS.Key words: nodulation factors, synthesis, enzymatic transfer, thiooligosaccharides, UDP-glucosamine.

APA, Harvard, Vancouver, ISO, and other styles

7

Yoshimi, Yasuharu, Hirotomo Kanai, Keisuke Nishikawa, Yasushi Ohta, Yoshiki Okita, Kousuke Maeda, and Toshio Morita. "Electron transfer promoted photochemical reductive radical cyclization reactions of allyl 2-bromoaryl ethers." Tetrahedron Letters 54, no. 19 (May 2013): 2419–22. http://dx.doi.org/10.1016/j.tetlet.2013.02.103.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Zaccaria, Francesco, Peter H. M. Budzelaar, Cristiano Zuccaccia, Roberta Cipullo, Alceo Macchioni, Vincenzo Busico, and Christian Ehm. "Chain Transfer to Solvent and Monomer in Early Transition Metal Catalyzed Olefin Polymerization: Mechanisms and Implications for Catalysis." Catalysts 11, no. 2 (February 5, 2021): 215. http://dx.doi.org/10.3390/catal11020215.

Full text

Abstract:

Even after several decades of intense research, mechanistic studies of olefin polymerization by early transition metal catalysts continue to reveal unexpected elementary reaction steps. In this mini-review, the recent discovery of two unprecedented chain termination processes is summarized: chain transfer to solvent (CTS) and chain transfer to monomer (CTM), leading to benzyl/tolyl and allyl type chain ends, respectively. Although similar transfer reactions are well-known in radical polymerization, only very recently they have been observed also in olefin insertion polymerization catalysis. In the latter context, these processes were first identified in Ti-catalyzed propene and ethene polymerization; more recently, CTS was also reported in Sc-catalyzed styrene polymerization. In the Ti case, these processes represent a unique combination of insertion polymerization, organic radical chemistry and reactivity of a M(IV)/M(III) redox couple. In the Sc case, CTS occurs via a σ-bond metathesis reactivity, and it is associated with a significant boost of catalytic activity and/or with tuning of polystyrene molecular weight and tacticity. The mechanistic studies that led to the understanding of these chain transfer reactions are summarized, highlighting their relevance in olefin polymerization catalysis and beyond.

APA, Harvard, Vancouver, ISO, and other styles

9

Schwan, Adrian L., and John Warkentin. "The reactions of simple dimethylallylamines with dimethyl acetylenedicarboxylate. Formation of 1-dimethylamino-2-allylmaleates via formal allyl transfer." Canadian Journal of Chemistry 66, no. 7 (July 1, 1988): 1686–94. http://dx.doi.org/10.1139/v88-273.

Full text

Abstract:

Tertiary amines bearing two methyl groups and an allylic substituent (X) react with dimethyl acetylenedicarboxylate (DMAD) to afford the corresponding 1-dimethylamino-2-X′ maleates, in which X′ is the allylic isomer of X. The mechanism postulated involves reversible formation of a zwitterion by attack of the amine at an sp-carbon of DMAD. The zwitterion then undergoes intramolecular allyl transfer, through a 6-membered transition state. Evidence for a zwitterionic intermediate (quaternary ammonium allenolate) includes capture of the allenolate centre by intramolecular addition to a carbonyl group and by proton transfer from chloroform.

APA, Harvard, Vancouver, ISO, and other styles

10

Pitteloud, Jean-Philippe, Yong Liang, and Stanislaw F. Wnuk. "ChemInform Abstract: Chemoselective Transfer of Allyl or Phenyl Group from Allyl(phenyl)germanes in Pd-Catalyzed Reactions with Aryl Halides." ChemInform 43, no. 8 (January 27, 2012): no. http://dx.doi.org/10.1002/chin.201208048.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Allyl transfer reactions"

1

Hall, Michael J. "Silicon tethered ene and allyl transfer reactions." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275314.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Pham, Tung Ngoc. "Single electron transfer in reactions involving alkyl halides with nucleophiles." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/27353.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Basak, A. "Synthetic and biosynthetic studies based on radical and related processes." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370310.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Harvey, Lilia Cuesta. "Excited state proton transfer in ortho substituted naphthols : Part II Mechanistic studies of ortho allyl-naphthol photocyclizations." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/30017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Argyropoulos, John N. "Single electron transfer in the reactions of aromatic ketones and alkyl halides with enolates and alkoxides." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/27690.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Stafford, Petra M. "Approaches to the synthesis of non-natural carbohydrates via silicon tethered ene and allyl transfer reactions." Thesis, University of Oxford, 2004. http://ora.ox.ac.uk/objects/uuid:b1ea3f8b-6a69-443d-8171-0ffd1cc37b45.

Full text

Abstract:

The efficiency of an intermolecular synthetic transformation can be improved by temporarily linking reaction components together. The addition of a tether leads to enhanced regio- and stereocontrol by restraining the mobility of the reacting partners, effectively transforming an intermolecular reaction into its intramolecular counterpart. Silicon tethers are associated with an expanding range of applications, including hydrosilylations, cycloadditions and radical reactions. This project has continued work pioneered by the Robertson group into silicon tethered Type I ene cyclisations, extending the methodology to incorporate O-linked ene precursors with the intention of applying this chemistry to the stereoselective synthesis of non-natural carbohydrates. This investigation encompassed advances in the area made concurrently within the Robertson group and extended the scope of the ene protocol by successfully incorporating latent functionality into the R-group side chain. In addition, a new route to the O-linked ene precursors was established employing silylcyanohydrin chemistry. In general, the ene reactions proceeded stereoselectively to generate the expected oxasilacyclohexanols, which could be cleaved oxidatively to afford 1,2,4-triols. The formation of the major diastereomer was consistent with ene cyclisation proceeding through a trans-decalin type transition state (e.g. leading to compound 1). During our attempts to effect ene cyclisation in the O-linked prenyl systems we observed an unexpected side reaction, resulting from intramolecular allylic transfer. Further studies revealed that this novel process could be initiated thermally to generate 1,2-homoallylic diols with excellent levels of stereoselectivity. Tethered E- and Z-crotylsilanes were found to be equally receptive to this process. Although attempts to apply the silicon tethered allyl transfer chemistry to aldimines and glycosides failed, an extension of the methodology to incorporate cyclohexadienylsilanes was successful and provided interesting synthetic intermediates for elaboration to carbasugars.

APA, Harvard, Vancouver, ISO, and other styles

7

Patil, Shradha Vasant. "Radical additions of hydrocarbons, ethers and acetals to alkenes via allyl transfer reaction: A new chain reaction for C-H bond functionalization." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50658.

Full text

Abstract:

Functionalization of hydrocarbons via a free-radical based allyl transfer reaction using various allyl bromide substrates has been previously studied. The work described in this dissertation focuses on the replacement of Br by phthalimido-N-oxyl (PINO ) which helps make this chemistry environmentally friendly. To replace Br with PINO , replacement of previously used allyl-bromide substrates with new allyl-PINO substrates were necessary. Various allyl- PINO compounds were synthesized and the use of these allyl-phthalimido-N-oxyl (allyl-PINO) compounds for the functionalization of various alkyl aromatic hydrocarbons is demonstrated.
Kinetic studies were performed to observe the efficiency of the new chain reaction compared to the previously reported studies with allyl-bromides. We recently discovered that these allyl substrates are useful for the functionalization of ethers and acetals. The functionalization of various cyclic and acyclic ethers was performed using these allyl transfer reactions. This reaction was also performed in-solution, which allowed us to perform these reactions at low reagent concentrations. Kinetic chain lengths were measured for these reactions. High chain lengths were observed for all used ethers. Kinetic studies to investigate the rate of radical addition-elimination processes were performed using laser flash photolysis and competition kinetics. These experiments helped us to measure the reactivity and selectivity of PINO as a chain carrier in comparison with Br .
Additionally, a new competition experiment was designed to study the relative rate constant for
the 􀈕-fragmentation process. For this experiment a novel substrate that contains two leaving
groups, Br and PINO , was synthesized, and the relative rates of elimination of Br vs PINO
were compared.
Ph. D.

APA, Harvard, Vancouver, ISO, and other styles

8

Park, Bongjin. "Single electron transfer in reactions involving alkyl halides with lithium alkylamide, lithium alkyl and lithium metal." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/27052.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Sai, Masahiro. "Metal-Catalyzed Allyl-, Allenyl-, Propargyl-Transfer Reaction and Its Application to Functional Materials." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157600.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Laurent, Pascale. "Complexes acyl, alcoxycarbonyl et alkyl tetracarbonylfer : intermédiaires dans la carbonylation catalytique d'halogénures d'alkyle." Brest, 1989. http://www.theses.fr/1989BRES2002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Allyl transfer reactions"

1

Wrackmeyer, B. "By Transfer of Al Hydride from one Olefin to Another-Al Alkyl-Olefin Displacement." In Inorganic Reactions and Methods, 146–47. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145241.ch44.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Choi, Junghoon, Jongsung Yoem, Jongha Lee, Taekee Hong, and Jinsoon Cha. "Alkyl Transfer Reactions of Trialkylborane to the Carbonyl Groups by Electrochemical Method." In Novel Trends in Electroorganic Synthesis, 341–42. Tokyo: Springer Japan, 1998. http://dx.doi.org/10.1007/978-4-431-65924-2_102.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Nojima, M., and S. Kusabayashi. "Reaction of Alkyl Halides with Lithium and Magnesium Reagents. Nucleophilic Substitution vs. Single Electron Transfer." In Paramagnetic Organometallic Species in Activation/Selectivity, Catalysis, 503–17. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0877-2_35.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Bartoli, Giuseppe, Marcella Bosco, Renato Dalpozzo, and Loris Grossi. "Polar Versus Electron Transfer Pathway in the Reaction of Alkyl Lithium and Alkyl Grignard Reagents with Mononttroarenes: Factors Affecting Product Distribution." In Paramagnetic Organometallic Species in Activation/Selectivity, Catalysis, 489–502. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0877-2_34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Lambert, Tristan H. "New Methods for C–N Ring Construction." In Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0055.

Full text

Abstract:

The reduction of pyridines offers an attractive approach to piperidine synthesis, and now Toshimichi Ohmura and Michinori Suginome of Kyoto University have developed (J. Am. Chem. Soc. 2012, 134, 3699) a rhodium-catalyzed hydroboration of pyridines, including the reaction of 1 to produce 3. Timothy J. Donohoe at the University of Oxford has found (Org. Lett. 2011, 13, 2074) that pyridinium silanes 4 undergo intramolecular hydride transfer by treatment with TBAF to produce dihydropyridones (e.g., 5) with good diastereoselectivity. Enantioselective amination of allylic alcohols has proven challenging, but Ross A. Widenhoefer at Duke University has reported (Angew. Chem. Int. Ed. 2012, 51, 1405) that a chiral gold catalyst can effect such intramolecular cyclizations with good enantioselectivity, as in the synthesis of 7 from 6. Alternatively, Masato Kitamura at Nagoya University has developed (Org. Lett. 2012, 14, 608) a ruthenium catalyst that operates at as low as 0.05 mol% loading for the conversion of substrates such as 8 to 9. Efforts to replace transition metal catalysts with alkaline earth metal-based alternatives have been gaining increasing attention, and Kai C. Hultzsch at Rutgers University has found (Angew. Chem. Int. Ed. 2012, 51, 394) that the magnesium complex 12 is capable of catalyzing intramolecular hydroamination (e.g., 10 to 11) with high enantioselectivity. Meanwhile, a stereoselective Wacker-type oxidation of tert-butanesulfinamides such as 13 to produce pyrrolidine derivatives 14 has been disclosed (Org. Lett. 2012, 14, 1242) by Shannon S. Stahl at the University of Wisconsin at Madison. Though highly desirable, Heck reactions have rarely proven feasible with alkyl halides due to competitive β-hydride elimination of the alkyl palladium intermediates. Sherry R. Chemler at the State University of New York at Buffalo has demonstrated (J. Am. Chem. Soc. 2012, 134, 2020) a copper-catalyzed enantioselective amination Heck-type cascade (e.g., 15 and 16 to 17) that is thought to proceed via radical intermediates. David L. Van Vranken at the University of California at Irvine has reported (Org. Lett. 2012, 14, 3233) the carbenylative amination of N-tosylhydrazones, which proceeds through η3-allyl Pd intermediates constructed via carbene insertion. This chemistry was applied to the two-step synthesis of caulophyllumine B from vinyl iodide 18 and N-tosylhydrazone 19.

APA, Harvard, Vancouver, ISO, and other styles

6

Zhang, J., D. Liu, and Y. Chen. "1.9 Oxygen-Centered Radicals." In Free Radicals: Fundamentals and Applications in Organic Synthesis 1. Stuttgart: Georg Thieme Verlag KG, 2021. http://dx.doi.org/10.1055/sos-sd-234-00177.

Full text

Abstract:

AbstractOxygen-centered radicals (R1O•) are reactive intermediates in organic synthesis, with versatile synthetic utilities in processes such as hydrogen-atom transfer (HAT), β-fragmentation, radical addition to unsaturated carbon–carbon bonds, and rearrangement reactions. In this review, we focus on recent advances in the generation and transformation of oxygen-centered radicals, including (alkyl-, α-oxo-, aryl-) carboxyl, alkoxyl, aminoxyl, phenoxyl, and vinyloxyl radicals, and compare the reactivity of oxygen-centered radicals under traditional reaction conditions with their reactivity under visible-light-induced reaction conditions.

APA, Harvard, Vancouver, ISO, and other styles

7

Taliaferro, Jeffrey W. "The United States and Taiwan’s Nuclear Weapons Program, 1967–1978." In Defending Frenemies, 211–58. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190939304.003.0006.

Full text

Abstract:

Chapter 6 examines the nonproliferation dispute between the United States and the Republic of China (ROC) on Taiwan between 1967 and 1987. Like the South Korean case, the Nixon administration’s efforts to extricate the United States from the Vietnam War, draw down US troop levels in East and Southeast Asia, and seek a rapprochement with the People’s Republic of China precipitated this dispute. The overriding goal of the Nixon, Ford, and Carter administrations was to enlist China as an ally of convenience against the Soviet Union, but without completely abandoning Taiwan. The Ford and the Carter administrations used a mix of threats to suspend bilateral nuclear cooperation and promises of limited arms transfers to convince ROC premier (and later president) Chiang Ching-kuo to abandon nuclear weapons research in the late 1970s. Reports that Taiwan achieved a “controlled” nuclear reaction in 1987 led the Reagan administration to demand ROC president Lee Teng-hui renounce all nuclear weapons research.

APA, Harvard, Vancouver, ISO, and other styles

8

OLAH, George A., Subhash C. NARANG, Ronald L. PEARSON, and Chris A. CUPAS. "Synthetic Methods and Reactions; 48: Convenient and Safe Preparation of Alkyl Nitrates (Polynitrates) via Transfer Nitration of Alcohols (Polyols) with N-Nitrocollidinium Tetrafluoroborate." In World Scientific Series in 20th Century Chemistry, 993–94. World Scientific Publishing Company, 2003. http://dx.doi.org/10.1142/9789812791405_0198.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Taber, Douglass F. "C–O Ring Construction: The Oger/Lee/Galano Synthesis of 7(RS)-ST-Δ8-11-dihomo-Isofuran." In Organic Synthesis. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190646165.003.0047.

Full text

Abstract:

Shaorong Yang and Huanfeng Jiang of the South China University of Technology assembled (Angew. Chem. Int. Ed. 2014, 53, 7219) the β-lactone 3 by the Pd-catalyzed addition of 2 to the alkyne 1. Jack R. Norton of Columbia University observed (J. Am. Chem. Soc. 2015, 137, 1036) that the vanadium-mediated reductive cyclization of 4 proceeded by a free radical mechanism, leading to the cis 3,4-disubstituted tetrahydrofuran 5. The cyclization of 6 to 7 developed (J. Org. Chem. 2015, 80, 965) by Glenn M. Sammis of the University of British Columbia also involved H atom transfer. Amy R. Howell of the University of Connecticut devised (J. Org. Chem. 2015, 80, 5196) the ring expansion of the β-lactone 8 to the tetrahydrofuran 9. Dmitri V. Filippov and Jeroen D. C. Codée of Leiden University showed (J. Org. Chem. 2015, 80, 4553) that the net reductive alkylation of the lactone 10 led to 11 with high diastereocontrol. A. Stephen K. Hashmi of the Ruprecht-Karls-Universität Heidelberg optimized (Chem. Eur. J. 2015, 21, 427) the gold-mediated rearrangement of the ester 12 to the lactone 13. This reaction apparently proceeded by the coupling of the metalated lactone with a propargylic carbocationic species. Benjamin List of the Max-Planck-Institut für Kohlenforschung developed (Angew. Chem. Int. Ed. 2015, 54, 7703) an organocatalyst that mediated the addition of 15 to 14, leading to 16 in high ee. Scott E. Denmark of the University of Illinois published (Nature Chem. 2015, 6, 1056) a detailed study of the enantioselective cyclization of 17 to 18. Shunichi Hashimoto of Hokkaido University established (Tetrahedron Lett. 2015, 56, 1397) that his catalyst was effective for the cyclization of 19 to 20. Debendra K. Mohapatra of the Indian Institute of Chemical Technology showed (J. Org. Chem. 2015, 80, 1365) that allyl trimethylsilane could trap the intermediate from the cyclization of 21, leading to 22 with high diastereocontrol. Young-Ger Suh of Seoul National University used (Chem. Commun. 2015, 51, 9026) a Pd catalyst to cyclize 23 to (−)-deguelin 24. John Montgomery of the University of Michigan showed (Org. Lett. 2015, 17, 1493) that the Ni-catalyzed reductive cyclization of 25 to 26 proceeded with high diastereoselectivity.

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Allyl transfer reactions"

1

Kockmann, Norbert, and Dominique M. Roberge. "Liquid-Liquid Test Reactions to Characterize 2-Phase-Mixing in Microchannels." In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2011. http://dx.doi.org/10.1115/icnmm2011-58157.

Full text

Abstract:

Multiphase flow is often found in chemical engineering, food processing, or analytics. First contacting and droplet generation as well as coalescence and re-dispersion have high importance for the flow characteristics. In all processes, the channel geometry, fluid properties, and flow velocity determine the flow regime, droplet size, and interfacial area. The hydrolysis of alkyl acetates in organic phase with sodium hydroxide NaOH in the aqueous phase is investigated as flexible test reaction for mass transfer and interfacial area. For right design of the characteristic time for mass transfer, the alkyl group is chosen from ethyl, isopropyl or n-butyl, which differ in water solubility, diffusivity and rate constant. The consumption of NaOH is used for calculation of specific area and related mass transfer coefficient. Different channel geometries are characterized and design considerations are conducted.

APA, Harvard, Vancouver, ISO, and other styles

2

Frank, Derek, G. Grubbs II, S. Cooke, Stewart Novick, Wei Lin, and Daniel Obenchain. "MONITORING THE REACTION PRODUCTS OF PERFLUOROPROPIONIC ACID AND ALLYL PHENYL ETHER USING CHIRPED-PULSE FOURIER TRANSFORM MICROWAVE (CP-FTMW) SPECTROSCOPY." In 69th International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2014. http://dx.doi.org/10.15278/isms.2014.fd01.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Purdon, A. D., and J. B. Smith. "RELEASE AND TRANSACYLATION OF ARACHIDONATE FROM A COMMON POOL OF 1-ACYL-2-ARACHIDONOYL GLYCEROPHOSPHOCHOLINE IN HUMAN PLATELETS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643391.

Full text

Abstract:

We have previously shown that the main source of arachidonate in thrombin-stimulated human platelets is 1-acyl-2-arachidonoyl (AA) glycerophosphocholine (GPC) and release of 3H-AA from this phospholipid also was correlated with increased 3H-AA in ether phospholipid. This ATP independent transfer of 3H-AA from 1,2 diacyl GPC to ether phospholipid (transacylation) also occurs in resting cells. Human platelets in 1/10 volume of plasma (ACD anticoagulant, pH 6.5) were radiolabelled with 3H-AA for 60 min at 37°C and then exogenous 3H-AA was removed by gel filtration into Tyrode's buffer, pH 7.4, 0.2% albumin. These radiolabelled cells were incubated in the absence of exogenous 3H-AA for four hours followed by Bligh and Dyer extraction and thin layer chromatography purification of phospholipids. 3H-AA in 1,2 diacyl GPC was found to decrease by over 20% and increase substantially in 1-0-alkyl-2-acyl GPC and 1-0-alk-1'-enyl-2-acyl glycerophospho ethanolamine (GPE), In this same time interval the mass of AA released by thrombin (5 U/ml, 10 min, 37°C, no stirring)in the presence of BIT 775C and measured by GLC, stayed the same (30 nmoles/109 cells), however, the specific activity decreased. Using reverse phase HPLC to resolve diradylglycerobenzoate derivatives of phospholipids: acylation, deacylation, and transacylation were observed for individual AA-containing molecular species of phospholipid, including those with an unsaturated fatty acid at sn-1. In particular the radiolabellinq of the 1-unsaturate-2-arachidonoyl GPC correlated with the specific activity of the 3H-AA released by stimulation with thrombin. Furthermore, 1-arachidonoyl-2-3H-arachidonoyl GPC was completely deacylated while 50 % of its mass remained. This contrasted with 16:0, and 18:0-2-arachidonoyl GPC in which the specific activity remained the same before and after deacylation. We conclude that deacylation of AA-containing molecular species of 1,2 diacyl GPC in stimulated cells includes molecular species which are also a source of arachidonic acid for transacylation reactions.

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Allyl transfer reactions"

1

Carraher, Jack McCaslin. Kinetic and mechanistic studies of reactive intermediates in photochemical and transition metal-assisted oxidation, decarboxylation and alkyl transfer reactions. Office of Scientific and Technical Information (OSTI), January 2014. http://dx.doi.org/10.2172/1226564.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Neckers, D. C. Tetramethylammonium Phenyltrialkylborates in the Photoinduced Electron Transfer Reaction with Benzophenone. Generation of Alkyl Radicals and Their Addition to Activated Alkenes. Fort Belvoir, VA: Defense Technical Information Center, June 1995. http://dx.doi.org/10.21236/ada296065.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Lampland, Nicole Lynn. Beyond alkyl transfer: Synthesis of main group metal (Mg, Ca, Zn) silyl and tris(oxazolinyl)borato complexes and their stoichiometric and catalytic reactions with borane Lewis acids and carbonyls. Office of Scientific and Technical Information (OSTI), May 2015. http://dx.doi.org/10.2172/1417988.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!