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Allyl Alcohols (allyl + alcohol)

Distribution by Scientific Domains

Chemistry	82%
Polymers and Materials Science	11%
2 Other Domains	7%

Distribution within Chemistry

Organic Chemistry	51%
General & Introductory Chemistry	30%

Selected Abstracts

Cationic Ruthenium-Cyclopentadienyl-Diphosphine Complexes as Catalysts for the Allylation of Phenols with Allyl Alcohol; Relation between Structure and Catalytic Performance in O - vs.

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 10 2009
C -Allylation
Abstract A new catalytic method has been investigated to obtain either O - or C -allylated phenolic products using allyl alcohol or diallyl ether as the allyl donor. With the use of new cationic ruthenium(II) complexes as catalyst, both reactions can be performed with good selectivity. Active cationic Ru(II) complexes, having cyclopentadienyl and bidentate phosphine ligands are generated from the corresponding Ru(II) chloride complexes with a silver salt. The structures of three novel (diphosphine)Ru(II)CpCl catalyst precursor complexes are reported. It appears that the structure of the bidentate ligand has a major influence on catalytic activity as well as chemoselectivity. In addition, a strong cocatalytic effect of small amounts of acid is revealed. Model experiments are described that have been used to build a reaction network that explains the origin and evolution in time of both O -allylated and C -allylated phenolic products. Some mechanistic implications of the observed structure vs. performance relation of the [(diphosphine)RuCp]+ complexes and the cocatalytic role of added protons are discussed. [source]

ChemInform Abstract: Novel Photoreaction Using Diphenyl Disulfide Derivatives: Photoinduced Oxidation of Allyl Alcohol.

CHEMINFORM, Issue 31 2008
Takaaki Tsuboi
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Reactions of Allyl Alcohols of the Pinane Series and of Their Epoxides in the Presence of Montmorillonite Clay

HELVETICA CHIMICA ACTA, Issue 2 2007
Irina
Abstract The reactivity of allyl alcohols of the pinane series and of their epoxides in the presence of montmorillonite clay in intra- and intermolecular reactions was studied. Mutual transformations of (+)- trans -pinocarveol ((+)- 2) and (,)-myrtenol ((,)- 3a) were major reactions of these compounds on askanite,bentonite clay (Schemes,1 and 2). However, the two reactions gave different isomerization products, indicating that the reactivity of the starting alcohol (+)- 2 or (,)- 3a was different from that of the same compound (+)- 2 or (,)- 3 formed in the course of the reactions. (,)- cis - and (+)- trans -Verbenol ((,)- 16 and (+)- 12, resp.), as well as (,)- cis -verbenol epoxide ((,)- 20) reacted with both aliphatic and aromatic aldehydes on askanite,bentonite clay giving various heterocyclic compounds (Schemes,4, 5 and 7); the reaction path depended on the structure of both the terpenoid and the aldehyde. [source]

Ruthenium Catalyzed Selective Regio-and-Mono-Allylation of Cyclic 1,3-Diketones Using Allyl Alcohols as Substrates

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 18 2009
Stefan Gruber
Abstract The new ruthenium-sulfonate catalyst Ru(Cp*)(,3 -C3H5),(p -CH3C6H4SO3)2, (Cp*=pentamethylcyclopentadienyl), rapidly and regioselectively mono-allylates dimedone to the branched products using substituted allyl alcohols as substrates, without acid, base or other additives, under relatively mild conditions. We consider the ruthenium sulfonate to be a "green" alternative in that it uses allyl alcohols as substrate, (rather than carbonates, acetates, etc.) and therefore does not waste the leaving group. The catalyst induces rapid double allylation of various 1,3-diketones in high yield using allylic alcohol. [source]

ChemInform Abstract: Synthesis of Epoxides by Palladium-Catalyzed Reactions of Tertiary Allyl Alcohols with Aryl or Alkenyl Halides.

CHEMINFORM, Issue 27 2009
Sayuri Hayashi
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Calix[n]arene Sulfonic Acids Bearing Pendant Aliphatic Chains as Recyclable Surfactant-Type Broensted Acid Catalysts for Allylic Alkylation with Allyl Alcohols in Water.

CHEMINFORM, Issue 45 2008
Yu-Liang Liu
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Arylation of Allyl Alcohols in Organic and Aqueous Media Catalyzed by Oxime-Derived Palladacycles: Synthesis of ,-Arylated Carbonyl Compounds.

CHEMINFORM, Issue 15 2008
Emilio Alacid
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Novel One-Pot Cycloisomerization,Knoevenagel Condensation Sequences with Yne Allyl Alcohols.

CHEMINFORM, Issue 48 2005
Christoph J. Kressierer
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Reaction of Chloral with Allyl Alcohols.

CHEMINFORM, Issue 3 2003
-Trichloro-2-hydroxytetrahydropyrans., Synthesis of Substituted
No abstract is available for this article. [source]

ChemInform Abstract: New Methods of Hydroformylation of Olefins and Isomerization of Allyl Alcohols Using the CoBr2/Zn/CO/t-BuOH Reagent System.

CHEMINFORM, Issue 5 2002
Thotapally Rajesh
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: A New Route for the Synthesis of Mono-Fluorinated Allyl Alcohols Using the Stereoselective Wittig Olefination via Reaction of (,-Fluorovinyl)triphenylphosphonium Triflate.

CHEMINFORM, Issue 45 2001
Takeshi Hanamoto
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Highly Stereoselective Synthesis of Phenylseleno- and p -Tolylsulfonyl Substituted 1,3-Dienes from Functionalized Allyl Alcohols

CHINESE JOURNAL OF CHEMISTRY, Issue 2 2004
Mei-Hua Xie
Abstract Phenylseleno- and p -tolylsulfonyl substituted 1,3-dienes were conveniently prepared with high stereoselectivity by the elimination reaction of phenylseleno- and p -tolylsulfonyl substituted allyl alcohols in the presence of BF3 · Et2O in acetic anhydride. The products were characterized by 1H NMR, MS, IR and elemental analysis. The single crystal structure of 2a was determined by X-ray diffraction analysis. [source]

KlADH3, a gene encoding a mitochondrial alcohol dehydrogenase, affects respiratory metabolism and cytochrome content in Kluyveromyces lactis

FEMS YEAST RESEARCH, Issue 8 2006
Michele Saliola
Abstract A Kluyveromyces lactis strain, harbouring KlADH3 as the unique alcohol dehydrogenase (ADH) gene, was used in a genetic screen on allyl alcohol to isolate mutants deregulated in the expression of this gene. Here we report the characterization of some mutants that lacked or had highly reduced amounts of KlAdh3p activity; in addition, these mutants showed alterations in glucose metabolism, reduced respiration and reduced cytochrome content. Our results confirm that the KlAdh3p activity contributes to the reoxidation of cytosolic NAD(P)H feeding the respiratory chain through KlNdi1p, the mitochondrial internal transdehydrogenase. The low levels of KlAdh3p in two of the mutants were associated with mutations in KlSDH1, one of the genes of complex II, suggesting signalling between the respiratory chain and expression of the KlADH3 gene. [source]

Highly Reactive Multilayer-Assembled TiO2 Coating on Electrospun Polymer Nanofibers

ADVANCED MATERIALS, Issue 12 2009
Jung Ah Lee
Highly efficient photocatalytically active TiO2 -coated polymer fibers are prepared using a facile and universal method involving layer-by-layer assembly of TiO2 nanoparticles and POSS molecules on various electrospun fibers. The TiO2 -coated fibers display excellent photocatalytic properties in degradation of allyl alcohol under UV illumination, without degradation of substrates. [source]

Kinetics and mechanisms of OH-initiated oxidation of small unsaturated alcohols

INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, Issue 3 2010
Kenshi Takahashi
Smog chamber relative rate techniques were used to measure rate coefficients of (5.00 ± 0.54) × 10,11, (5.87 ± 0.63) × 10,11, and (6.49 ± 0.82) × 10,11 cm3 molecule,1 s,1 in 700 Torr air at 296 ± 1 K for reactions of OH radicals with allyl alcohol, 1-buten-3-ol, and 2-methyl-3-buten-2-ol, respectively; the quoted uncertainties encompass the extremes of determinations using two different reference compounds. The OH-initiated oxidation of allyl alcohol in the presence of NOx gives glycolaldehyde in a molar yield of 0.85 ± 0.08; the quoted uncertainty is two standard deviations. Oxidation of 2-methyl-3-buten-2-ol gives acetone and glycolaldehyde in molar yields of 0.66 ± 0.06 and 0.56 ± 0.05, respectively. The reaction of OH radicals with allyl alcohol, 1-buten-3-ol, and 2-methyl-3-buten-2-ol proceeds predominately via addition to the >CCH2 double bond with most of the addition occurring to the terminal carbon. © 2010 Wiley Periodicals, Inc. Int J Chem Kinet 42: 151,158, 2010 [source]

Cationic Ruthenium-Cyclopentadienyl-Diphosphine Complexes as Catalysts for the Allylation of Phenols with Allyl Alcohol; Relation between Structure and Catalytic Performance in O - vs.

Epoxidation of allyl alcohol with hydrogen peroxide over titanium silicalite TS-2 catalyst

JOURNAL OF CHEMICAL TECHNOLOGY & BIOTECHNOLOGY, Issue 7 2007
Agnieszka Wróblewska
Abstract The influence of the technological parameters on the course of the epoxidation of allyl alcohol with 30% H2O2 in the presence of titanium silicalite TS-2 catalyst and methanol as a solvent was studied. The process was performed in an autoclave at the autogenic pressure. The influence of temperature in the range 20,120 °C, molar ratio of allyl alcohol/H2O2 (1:1,10:1), methanol concentration in the reaction mixture (10,80% w/w), catalyst TS-2 concentration (0.1,2.0% w/w) and reaction time (1,8 h) were investigated. The functions describing the process were: selectivity of transformation to glycidocidol in relation to allyl alcohol consumed, selectivity of transformation to organic compounds in relation to hydrogen peroxide consumed, conversions of allyl alcohol and hydrogen peroxide. Copyright © 2007 Society of Chemical Industry [source]

Antifibrogenic effects of tamoxifen in a rat model of periportal hepatic fibrosis

LIVER INTERNATIONAL, Issue 2 2009
Soo Hyung Ryu
Abstract Backgrounds/Aims: It has been reported that tamoxifen may affect hepatoma cell growth in vitro by suppressing transforming growth factor ,-1 (TGF-,1) expression, suggesting that tamoxifen might also retard fibrogenesis. Thus, we examined whether tamoxifen might suppress TGF-,1 expression and consequently inhibit the process of hepatic fibrosis in vivo. Methods: To induce periportal hepatic fibrosis, 50 male adult Sprague,Dawley rats were injected with 0.62 mmol/kg of allyl alcohol, intraperitoneally, twice a week for 8 weeks. Hepatic fibrosis scores, intrahepatic collagen levels and plasma TGF-,1 expression levels were evaluated in three groups of 10 rats orally administered tamoxifen at 1, 5 and 10 mg/kg, respectively, and in 20 controls. Messenger RNAs (mRNAs) encoding TGF-,1 and TGF-, receptors in liver tissue were semiquantified using reverse transcriptase polymerase chain reaction. Results: Hepatic fibrosis scores decreased progressively as the dose of tamoxifen increased, resulting in a significant change in rats treated with tamoxifen at 10 mg/kg compared with controls (P=0.018). Intrahepatic collagen content was significantly less in the group treated with tamoxifen at 10 mg/kg compared with the control (P=0.045). Plasma TGF-,1 levels were also significantly lower in rats treated with tamoxifen at 10 mg/kg compared with controls (P=0.007). All three concentrations of tamoxifen tested decreased the expression levels of hepatic TGF-,1 mRNA and type I TGF-, receptor (TGF-, RI) mRNA to similar extents. Conclusions: Tamoxifen seems to inhibit the process of hepatic fibrosis dose-dependently by suppressing the transcription of TGF-,1 and TGF-, RI in an experimental model of periportal hepatic fibrosis. [source]

Ceric Ammonium Nitrate Initiated Grafting of PEG to Plasma Polymers for Cell-Resistant Surfaces

PLASMA PROCESSES AND POLYMERS, Issue 2 2008
Naomi J. Vickers
Abstract The development of a facile method with general applicability and mild reaction conditions for grafting PEG onto surfaces to reduce bio-adhesion is described. The approach taken was to use CAN to graft PEG to plasma polymers coatings selected to give a high concentration of alcohol groups. The study showed that grafting required functional groups on surfaces, a minimum concentration of CAN initiator (0.05 M) and was time and initiator concentration dependent. Adhesion of fibroblasts and endothelial cells was reduced to negligible levels compared to the adhesion to tissue culture polystyrene and untreated plasma polymers of allyl alcohol following CAN induced PEG grafting. [source]

Plasma-modified poly(vinyl alcohol) membranes for the dehydrationof ethanol

POLYMER INTERNATIONAL, Issue 7 2003
M Rafik
Abstract Non-porous poly(vinyl alcohol) (PVA) membranes prepared by a cast-evaporating technique were covered with an allyl alcohol or acrylic acid plasma-polymerized layer. The wettability and the surface energy, as well as the chemical nature of the deposit, were assigned by X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR). The ability of the modified membranes for dehydrating the water/ethanol azeotropic mixture by pervaporation was studied at 25, 40 and 60 °C. The best selectivity (, = 250 at 25 °C) was obtained in the case of the allyl alcohol plasma treatment. The results obtained are discussed on the basis of the hydrophilicity as well as in terms of the weakly crosslinked superficial layer that favoured the membrane swelling. Copyright © 2003 Society of Chemical Industry [source]

Why Platinum Catalysts Involving Ligands with Large Bite Angle Are so Efficient in the Allylation of Amines: Design of a Highly Active Catalyst and Comprehensive Experimental and DFT Study

CHEMISTRY - A EUROPEAN JOURNAL, Issue 32 2008
Guilhem Mora
Abstract The platinum-catalyzed allylation of amines with allyl alcohols was studied experimentally and theoretically. The complexes [Pt(,3 -allyl)(dppe)]OTf (2) and [Pt(,3 -allyl)(DPP-Xantphos)]PF6 (5) were synthesized and structurally characterized, and their reactivity toward amines was explored. The bicyclic aminopropyl complex [Pt(CH2CH2CH2NHBn- , - C,N)(dppe)]OTf (3) was obtained from the reaction of complex 2 with an excess of benzylamine, and this complex was shown to be a deactivated form of catalyst 2. On the other hand, reaction of complex 5 with benzylamine and allyl alcohol led to formation of the 16-VE platinum(0) complex [Pt(,2 -C3H5OH)(DPP-Xantphos)] (7), which was structurally characterized and appears to be a catalytic intermediate. A DFT study showed that the mechanism of the platinum-catalyzed allylation of amines with allyl alcohols differs from the palladium-catalyzed process, since it involves an associative ligand-exchange step involving formation of a tetracoordinate 18-VE complex. This DFT study also revealed that ligands with large bite angles disfavor the formation of platinum hydride complexes and therefore the formation of a bicyclic aminopropyl complex, which is a thermodynamic sink. Finally, a combination of 5 and a proton source was shown to efficiently catalyze the allylation of a broad variety of amines with allyl alcohols under mild conditions. [source]

Epoxidation of allyl alcohol with hydrogen peroxide over titanium silicalite TS-2 catalyst

Dehydration and Dehydrogenation of Alcohols with Mononuclear Cationic Vanadium Oxides in the Gas Phase and Energetics of VOnH0/+ (n = 2, 3),

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, Issue 17 2007
Marianne Engeser
Abstract The ion/molecule reactions of selected alcohols with the vanadium oxide cations VO+ and VO2+ are studied by Fourier-transform ion-cyclotron resonance (FT-ICR) mass spectrometry. Dehydrogenation is the dominating reaction pathway for methanol and allyl alcohols. With larger or less unsaturated alcohols, dehydration and carbocation formations prevail. While the valence in VO+ remains unchanged during alcohol dehydrogenation, VO2+ is reduced to VIII. Thermochemical data for VO2H0/+, VO3H and VO3H2+ are derived by means of ICR bracketing. The experimental results are further complemented by ab initio calculations using density functional theory. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source]

Oligonucleotide Analogues with Integrated Bases and Backbone.

HELVETICA CHIMICA ACTA, Issue 5 2007
Part 1
Abstract The self-complementary (Z)-configured U*[ce]A(*) dinucleotide analogues 6, 8, 10, 12, 14, and 16, and the A*[ce]U(*) dimers 19, 21, 23, 25, 27, and 29 were prepared by partial hydrogenation of the corresponding ethynylene linked dimers. Photolysis of 14 led to the (E)-alkene 17. These dinucleotide analogues associate in CDCl3 solution, as evidenced by NMR and CD spectroscopy. The thermodynamic parameters of the duplexation were determined by van't Hoff analysis. The (Z)-configured U*[ce]A(*) dimers 14 and 16 form cyclic duplexes connected by Watson,Crick H-bonds, the (E)-configured U*[ce]A dimer 17 forms linear duplexes, and the U*[ce]A(*) allyl alcohols 6, 8, 10, and 12 form mixtures of linear and cyclic duplexes. The C(6/I)-unsubstituted A*[ce]U allyl alcohols 19 and 23 form linear duplexes, whereas the C(6/I)-substituted A*[ce]U* allyl alcohols 21 and 25, and the C(5,/I)-deoxy A*[ce]U(*) dimers 27 and 29 also form minor amounts of cyclic duplexes. The influence of intra- and intermolecular H-bonding of the allyl alcohols and the influence of the base sequence upon the formation of cyclic duplexes are discussed. [source]

Reactions of Allyl Alcohols of the Pinane Series and of Their Epoxides in the Presence of Montmorillonite Clay

Highly Enantioselective Iridium-Catalyzed Hydrogenation of Trisubstituted Olefins, ,,,-Unsaturated Ketones and Imines with Chiral Benzylic Substituted P,N Ligands

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 1 2010
Wei-Jing Lu
Abstract The benzylic substituted P,N ligands, diphosphinobenzyloxazolines, showed their high catalytic activity as well as asymmetric induction in the iridium-catalyzed asymmetric hydrogenation of unfunctionalized alkenes, ,,,-unsaturated esters, allyl alcohols, ,,,-unsaturated ketones, and imines, providing the corresponding chiral products in high ee with high conversion. [source]

Ruthenium Catalyzed Selective Regio-and-Mono-Allylation of Cyclic 1,3-Diketones Using Allyl Alcohols as Substrates

Novel Enantioselective Sequentially Rhodium(I)/BINAP- Catalyzed Cycloisomerization,Hydrogenation,Isomerization, Acetalization (CIHIA)

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 17 2009
Nadine Körber
Abstract Linear, easily accessible alkyl and (hetero)aryl-substituted alkynyl allyl alcohols are readily and enantioselectively transformed into 2,7-dioxabicyclo[3.2.1]octanes by a sequential rhodium-catalyzed process. Based on the initial cycloisomerization, the in situ generated rhodium(I)-BINAP complex enables a subsequent reduction with hydrogen and the transformation into bicyclic frameworks. [source]

Platinum Nanoparticles Supported on Ionic Liquid-Modified Magnetic Nanoparticles: Selective Hydrogenation Catalysts

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 13 2007
Raed Abu-Reziq
Abstract A method for supporting platinum nanoparticles on magnetite nanoparticles is described. The method requires modification of the surface of the magnetic nanoparticles with ionic liquid groups. Before modification, the magnetic nanoparticles are not stable and easily aggregate and, after modification, the magnetite nanoparticles become highly stable and soluble in polar or non-polar organic solvents depending on the alkyl group of the linked ionic liquids. The supporting of platinum nanoparticles on the modified magnetic nanoparticles was achieved by adsorbing platinum salts (K2PtCl4) on the surface of the magnetite nanoparticles via ion exchange with the linked ionic liquid groups and then reducing them by hydrazine. The supported platinum nanoparticles were applied in the catalytic hydrogenation of alkynes in which cis -alkenes were selectively produced, and in the hydrogenation of ,,,-unsaturated aldehydes where the allyl alcohols were obtained as the exclusive products. The new catalyst can be easily separated from the reaction mixtures by applying an external magnetic field and recycled. [source]

Why Platinum Catalysts Involving Ligands with Large Bite Angle Are so Efficient in the Allylation of Amines: Design of a Highly Active Catalyst and Comprehensive Experimental and DFT Study