GLORIA

GEOMAR Library Ocean Research Information Access

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
Filter
  • Chemistry  (2)
Document type
Keywords
Publisher
Years
  • 1
    Electronic Resource
    Electronic Resource
    Epoxidation of styrene catalyzed by metal complexes of poly(vinylbenzyl)acetylacetonate (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 729-731 
    Details
    ISSN: 1042-7147
    Keywords: epoxidation ; poly(vinylbenzyl)acetylacetonate ; cobalt complex ; molecular oxygen ; styrene ; 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: The epoxidation of styrene to styrene oxide at higher than 96% yield has been achieved by the catalysis by poly-(vinylbenzyl)acetylacetonate complexes of cobalt(II) or manganese(II) in the presence of isobutyraldehyde under an atmospheric pressure of molecular oxygen at room temperature. The kind of aldehyde and aldehyde/styrene molar ratio greatly influenced the reaction. The catalyst could be recycled, but after recycling for five times, the yield of styrene oxide decreased from 96.0% to 84.6%.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Conformational analysis of cyclic analogues of the Saccharomyces cerevisiae α-factor pheromone (1998)
    New York : Wiley-Blackwell
    Biopolymers 45 (1998), S. 21-34 
    Details
    ISSN: 0006-3525
    Keywords: cyclic analogues ; Saccharomyces cerevisiae ; α-factor ; pheromone ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Analogues of the α-factor mating pheromone (WHWLQLKPGQPMY) from Saccharomyces cerevisiae in which the side chains of residues 7 and 10 were joined by lactam bonds were studied by nmr and molecular modeling. These investigations were carried out to discern the effect of lactam ring size on conformation and to ascertain whether the side chain i to i + 3 cyclized tetramers [H. R. Marepalli et al. (1996) Journal of the American Chemical Society, Vol. 118, pp. 6531-6539] can be considered as conformation-constraining building blocks when introduced into a long peptide chain. Nuclear Overhauser effect constraints, temperature coefficients, and backbone torsional angles were derived from 1H-nmr spectra measured in DMSO-d6. Modeling studies using the above constraints indicate that the lactam regions of the tridecapeptides assume various combinations of type II β-turns, γ-turns, and γ′-turns, but never type I β-turns. These investigations provide evidence that the tetrapeptide building blocks retain their preferred conformations in larger molecules and can be used to control the architecture of regions of such peptides. © 1998 John Wiley & Sons, Inc. Biopoly 45: 21-34, 1998
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...