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  • Organic Chemistry  (2)
  • Polymer and Materials Science  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    C45- und C50-Carotinoide. 2. Mitteilung. Synthese von optisch aktiven acyclischen C15-Endgruppen (1984)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 67 (1984), S. 21-28 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: C45- and C50-Carotenoids. Synthesis of Optically Active Acyclic C15-End GroupsThe optically active C15-end groups (S)-12, (S)-13 and (R)-14 were prepared from the C12-synthon (S)-11 in good chemical and optical yield. These C15-end groups are suitable compounds for the synthesis of optically active C45- and C50-carotenoids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19840670104
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  • 2
    Electronic Resource
    Electronic Resource
    C45- and C50-Carotinoide. 1. Mitteilung. Synthese von (R)- and (S)-Lavandulol (1982)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 65 (1982), S. 293-301 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: C45- and C50-Carotenoids, 1st Communication. Synthesis of (R)- and (S)-LavandulolStarting with methyl (3 R)-3-hydroxybutanoate ((R)-7) and ethyl (3 S)-3- hydroxybutanoate ((S)-11), respectively, (R)- and (S)-lavandulol ((R)-1 and (S)-1) were synthesized with high optical purity. The synthesized key intermediates (R)-6 and (S)-6 are suitable compounds for the synthesis of optically active acyclic C45- and C50-carotenoids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19820650132
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  • 3
    Electronic Resource
    Electronic Resource
    The ene reaction between N-isobutylallylnadimide and N-isobutylmaleimide as a model for the cross-linking reaction in bis(allyl)nadimide polymerization (1990)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 191 (1990), S. 2579-2585 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The reaction between N-isobutylallylnadimide (NIBANI) and N-isobutylmaleimide (NIBMI) was taken as a model reaction to obtain insight into the curing mechanism of polymeric alloys and composites consisting of bis- or tris(allyl)nadimides and bismaleimides. The reaction between NIBANI and NIBMI is not catalyzed by boron trifluoride etherate, neither at room temperature nor in refluxing methylene chloride. The thermally induced reaction (200°C) between NIBANI and NIBMI in equimolar quantities gives an indirect proof for the occurrence of an ene reaction. The high reactivity of the ene reaction product to undergo further Diels-Alder reaction was proved by GPC and direct inlet mass spectral studies.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1990.021911106
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  • 4
    Electronic Resource
    Electronic Resource
    Allylnadic-imides: A new class of heat-resistant thermosets (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 1301-1323 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Allyl-bicyclo-(2,2,1)hept-5-en-dicarboxylic(2,3)imides (allylnadic-imides) are prepared by heating equivalent amounts of allylnadic anhydride and amines. Mixtures of isomers (1-allyl-endo, 6-allyl-endo and exo) were obtained, separated by flash chromatography and identified by 1H- and 13C-NMR. A series of novel allylnadic-imide monomers is described. Upon heating to 250°C oligomers are obtained. Diels - Aider rearrangement and “ene” type addition reactions seem to play a major role in oligomer formation. Bis- and tris-allylnadic-imides are viscous liquids resins or low melting solids, which are soluble in common solvents. Upon heating to 250°C insoluble, high Tg solids are obtained with good thermooxidative and environmental stability and with reduced burning rate. Cured allylnadic-imide resins are excellent high temperature insulators and low permittivity dielectrics. Crosslinked copolymers with maleic-imides and epoxy resins are described. Neat resin and carbon fiber composite properties are reported.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1989.080270415
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