ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Epoxidation of cis-cyclooctene with molecular oxygen catalyzed by magnesium oxide supported polytitazane cobalt (III) complexes (1996)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 243 (1996), S. 69-75 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Ein auf Magnesiumoxid aufgebrachter Polytitazan-Cobalt (III)-Komplex diente als effektiver Katalysator für die Epoxidierung von cis-Cycloocten mit molekularem Sauerstoff bei Normaldruck in Gegenwart von Isobutyraldehyd als Reduktionsmittel. Nach XPS-Untersuchungen wird Cobalt (III) durch den mehrzähnigen Stickstoffliganden des Polytitazans stabilisiert. Bei 25°C beträgt der cis-Cycloocten-Umsatz nach fünf Stunden 95,2%, mit einer Selektivität von 100% für das cis-Cyclohexylenoxid. Der Katalysator Kann mindestens neun Mal ohne Aktivitätsverlust verwendet werden.
    Notes: Magnesium oxide supported polytitazane cobalt (III) complex is demonstrated as an effective catalyst for the epoxidation of cis-cyclooctene with molecular oxygen at atmospheric pressure in the presence of isobutyraldehyde as the sacrificial reductant. XPS data show that the high-valent cobalt (III) is stabilized by the multidentate nitrogen ligand of polytitazane. The conversion of cis-cyclooctene is as high as 95.2% with 100% selectivity to the cis-cyclooctene oxide at 25°C within 5 h. The catalyst can be used at least nine times without loss of its activity.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1996.052430106
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Epoxidation of α-pinene with molecular oxygen catalyzed by poly(vinylbenzyl)acetylacetonate complexes of some metal ions (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 609-612 
    Details
    ISSN: 1042-7147
    Keywords: catalytic epoxidation ; α-pinene ; molecular oxygen ; poly(vinylbenzyl)acetylacetonate cobalt complex ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Poly(vinylbenzyl)acetylacetonate complex of cobalt is a very effective catalyst for the epoxidation of α-pinene under an atmospheric pressure of molecular oxygen at 25°C. With isobutyraldehyde as a reductant, the yield of the epoxidation of α-pinene amounts to 94.3% within 6 hr. The catalyst can be recycled at least eight times without apparent loss of activity.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 3
    Electronic Resource
    Electronic Resource
    Poly[(maleic acid)-co-styrene]-platinum complex; a catalyst for the hydrogenation of methyl formate (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 40 (1996), S. 9-12 
    Details
    ISSN: 0959-8103
    Keywords: poly[(maleic acid)-co-styrene]-platinum complex ; hydrogenation ; methyl formate ; methanol ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Coordinate bonds form between oxygen and platinum atoms in crosslinked poly[(maleic acid)-co-styrene]-platinum complex according to FTIR and XPS measurements. The complex is demonstrated to be an active and selective catalyst for the hydrogenation of methyl formate under mild conditions (25°C, 1 atm H2). Methyl formate can be converted selectively to methanol in 82·6% yield within 6h at a COOH/Pt mole ratio of 17·85 in the complex with n-propanol as the solvent. The catalyst exhibits high stability, with turnover number (mol of methyl formate converted/mol of platinum) of the catalyst reaching 1064 within 48 h.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 4
    Electronic Resource
    Electronic Resource
    Hydrogenation of norbornene catalyzed by magnesium oxide-supported polyalumazane-platinum complexes (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 84-87 
    Details
    ISSN: 1042-7147
    Keywords: magnesium oxide-supported polyalumazane ; zero-valent platinum ; support effect ; hydrogenation of norbornene ; high performance ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A magnesium oxide-supported polyalumazane-platinum complex was synthesized and characterized by X-ray photoelectron spectroscopy (XPS) and its performance toward the hydrogenation of norbornene. XPS data indicated that a large amount of platinum existed in a zero-valent state. The catalyst showed high performance for the hydrogenation of norbornene. Its performance depended on the type of the support, the platinum loading and the reaction temperature. With 0.1544 mmol/g platinum loading at 25°C, the hydrogenation of norbornene to norbornane was completed within 2 min. Also, the turnover number of the catalyst reached 11,000 within 280 min.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 5
    Electronic Resource
    Electronic Resource
    Selective oxidation of tetrahydrofuran with molecular oxygen catalyzed by polyalumazane-platinum complexes (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 88-91 
    Details
    ISSN: 1042-7147
    Keywords: selective oxidation ; molecular oxygen ; active species Pt(0) ; polyalumazane-platinum complexes ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Tetrahydrofuran (THF) was oxidized selectively with molecular oxygen catalyzed by magnesium oxide-based polyalumazane-supported platinum complexes under mild conditions. The selective oxidation of C-H bond α to the oxygen atom of ether and the oxidative path to ester other than ring cleavage to carboxylic acid were controlled by carrying out the reaction at 60°C with nitroethane as solvent. The platinum loading and the reaction time greatly affected the yield of γ-butyrolactone whereas the selectivity always remained at 100%. 76.92% γ-butyrolactone was obtained with 0.2811 mmol platinum loading per gram support within 12 hr. The single product of the THF oxidation was confirmed by 1H-nuclear magnetic resonance. X-ray photoelectron spectroscopy data also confirmed the more recent report on the activation of the C-H bond by the null valent platinum from the viewpoint of supported platinum catalyst. The oxidation path was also suggested.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 6
    Electronic Resource
    Electronic Resource
    Preparative Bioorganic Chemistry, XVI. Synthesis of 3,4′-Dihydroxypropiophenone 3-ß-D-Glucopyranoside, a Constituent of Betula platyphylla var. japonica, by Enzymatic Transglucosylation (1992)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1992 (1992), S. 485-487 
    Details
    ISSN: 0170-2041
    Keywords: Antifeedant ; Betula platyphylla ; ß-D-Glucopyranoside ; Lactase ; Transglucosylation ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 3,4′-Dihydroxypropiophenone 3-ß-D-glucopyranoside (1a) has been synthesized, without having recourse to any protective group technology, by transglucosylation catalyzed by lactase from Kluyveromyces lactis.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199219920186
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Synthesis of (3R,25R)-3,25-dihydroxyhexacosyl α-D-glucopyranoside, the heterocyst glycolipid of the marine cyanobacterium Nodularia harveyana (1994)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1994 (1994), S. 35-39 
    Details
    ISSN: 0170-2041
    Keywords: Cyanobacteria ; α-D-Glucosides ; Glycolipids ; Nodularia harveyana ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: (3R,25R)-3,25-Dihydroxyhexacosyl α-D-glucopyranoside (1a), the heterocyst glycolipid of Nodularia harveyana, was synthesized by starting from D-glucose, (S)-malic acid (4), 1-octadecyne (5) and ethyl (R)-3-hydroxybutanoate (6).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199419940108
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Pheromone synthesis, CLX. A new synthesis of the oviposition-deterring pheromone of the European cherry fruit fly Rhagoletis cerasi L. (1994)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1994 (1994), S. 291-295 
    Details
    ISSN: 0170-2041
    Keywords: Fruit fly, European cherry ; Glycosides ; Pheromones ; Oviposition-deterring pheromone ; Rhagoletis cerasi L ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A new synthesis of the ammonium salt 1c of (8RS,15R)-N-[(β-D-glucopyranosyloxy)-8-hydroxypalmitoyl]taurine, the oviposition-deterring pheromone of the European cherry fruit fly Rhagoletis cerasi L., was achieved by starting from 2,3,4,6-tetra-O-pivaloyl-α-D-glucopyranosyl bromide (2), taurine (4), ethyl (R)-3-hydroxybutanoate (5), propargyl alcohol (6), methyl acetoacetate (7), and 1,6-hexanediol (8).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199419940311
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...