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  • Chemistry, Organic  (2)
  • Chromium  (2)
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  • 1
    Online Resource
    Online Resource
    Metal catalyzed cascade reactions (2006)
    Berlin Heidelberg : Springer-Verlag GmbH
    Details Availability
    Keywords: Catalysis ; Chemistry, Organic ; Chemistry, inorganic ; Chemistry ; Aufsatzsammlung ; Tandem-Reaktion ; Übergangsmetallkomplexe ; Katalysator
    Description / Table of Contents: Klappentext: Transition metal-catalyzed cascade reactions are an elegant approach to complex molecular scaffolds. Besides their esthetics and increase in structural complexity, they have also become mechanistic challenges for the combination of organometallic elementary steps. As a consequence, cascade reactions have revolutionized synthetic strategies and conceptual thinking. The authors highlight cyclization via carbopalladation and acylpalladation and Heck-pericyclic sequences. They discuss p-allyl palladium-based cascade reactions, Michael-type additions as an entry to transition-metal-promoted cyclizative transformations, and sequential or consecutive palladium-catalyzed processes, and show Pauson-Khand cascades, metal-catalyzed cyclizations of acyclic precursors, as well as cascade and sequential ruthenium-catalyzed transformations. Therefore, the reader finds overview of an exciting and highly dynamic field of a new and innovative methodological concept.
    Type of Medium: Online Resource
    Pages: Online-Ressource (VIII, 339 S.) , zahlr. graph. Darst.
    Edition: Online-Ausg. 2006 Springer eBook Collection. Chemistry and Materials Science
    ISBN: 9783540329596
    Series Statement: Topics in organometallic chemistry 19
    URL: http://dx.doi.org/10.1007/11603696
    URL: http://www.gbv.de/dms/bowker/toc/9783540329589.pdf
    DOI: 10.1007/11603696
    DDC: 540
    RVK:
    VH 9700
    Language: English
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  • 2
    Online Resource
    Online Resource
    Metal Catalyzed Cascade Reactions (2006)
    Berlin, Heidelberg : Springer Berlin Heidelberg
    Details Availability
    Keywords: Chemistry, inorganic ; Chemistry, Organic ; Catalysis ; Chemistry ; Aufsatzsammlung ; Tandem-Reaktion ; Übergangsmetallkomplexe ; Katalysator
    Type of Medium: Online Resource
    Pages: Online-Ressource (IX, 339 p. Also available online, digital)
    ISBN: 9783540329596
    Series Statement: Topics in Organometallic Chemistry 19
    URL: https://doi.org/10.1007/11603696
    URL: https://swbplus.bsz-bw.de/bsz276366972cov.jpg
    DOI: 10.1007/11603696
    Language: English
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis and Structure of Allenyl-Substituted η6-Benzene(tricarbonyl)-chromium Complexes (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1135-1139 
    Details
    ISSN: 0009-2940
    Keywords: Arene complexes ; Chromium ; Allenes ; Rearrangements ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Cr(CO)3-complexed η6-phenylpropargylic alcohols 3 react in a displacement rearrangement with thionyl chloride or chlorodiphenylphosphane to give the chloro- or phosphoryl allenyl substituted η6-phenyl complexes 4 and 6, respectively. In the X-ray crystal structure of the novel organometallic allenic derivatives 4b and 6b the vicinal chloro or phosphoryl substituent and the benzene(tricarbonyl)chromium fragment are arranged coplanarily. Palladium/copper-catalyzed couplings of the chloroallene 4b with terminal alkynes disclose a facile access to ynallene derivatives 8, novel carbon-rich organometallic π-systems.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300816
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  • 4
    Electronic Resource
    Electronic Resource
    Sidechain Functionalizations by Cuprate Additions to Phosphorylallenyl-Substituted Arenetricarbonylchromium Complexes (1999)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 225-233 
    Details
    ISSN: 1434-1948
    Keywords: Arene complexes ; Chromium ; Sidechain functionalization ; Allenes ; Cuprates ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The cuprate addition to (arene)Cr(CO)3-substituted phosphorylallenes 1 gives rise to the regioselective formation of complexed allylphosphane oxide derivatives 3a-c and allylphosphonate derivatives 3d-j in good yields. In the case of racemic planar chiral ortho-substituted complexed (arylallenyl)phosphonates 1c, d the protonation of the intermediate allyl anion proceeds diastereoselectively due to the hindered rotation around the Cipso-Cα bond. This diastereoselective protonation is discussed on the basis of the conformational analysis as deduced from the X-ray structure analyses of the allenylphosphonate 1d and the allylphosphonates 3i, j.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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