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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Moritz, Ralf Wagner, Manfred Müllen, Klaus Schollmeyer, Dieter Baumgarten, Martin |
| Description | Author Affiliation: Moritz R ( Max Planck Institute for Polymer Research, 55128 Mainz, Ackermannweg 10 (Germany).); Wagner M ( Max Planck Institute for Polymer Research, 55128 Mainz, Ackermannweg 10 (Germany).); Schollmeyer D ( Institute of Organic Chemistry, University of Mainz, 55128 Mainz (Germany).); Baumgarten M ( Max Planck Institute for Polymer Research, 55128 Mainz, Ackermannweg 10 (Germany).); Müllen K ( Max Planck Institute for Polymer Research, 55128 Mainz, Ackermannweg 10 (Germany). muellen@mpip-mainz.mpg.de.) |
| Abstract | Large and rigid tetraarylphosphonium tetrafluoroborate salts have been synthesized representing weakly coordinating cations with diameters of several nanometers. Divergent dendritic growth by means of thermal Diels–Alder cycloaddition was employed for the construction of the hydrophobic polyphenylene framework up to the third generation. X-ray crystal structure analysis of first-generation phosphonium tetrafluoroborate supported the rigidity of the non-collapsible shell around the phosphorus center and gave insight into solid-state packing and cation–anion distances. Copper(I)-catalyzed azide–alkyne ligation served as reliable method for the preparation of a first-generation triazolylphenyl hybrid phosphonium cation under mild reaction conditions. Furthermore, from the synthesis of triarylbenzylphosphonium bromides, Wittig precursors with unprecedented bulky substituents in the α-position were accessible. Employment of these precursors under Wittig conditions by treatment with base and subsequent reaction with aldehydes preferentially provided (Z)-olefins with bulky polyphenylene substituents. |
| ISSN | 09476539 |
| e-ISSN | 15213765 |
| Journal | Chemistry - A European Journal |
| Issue Number | 25 |
| Volume Number | 21 |
| Language | English |
| Publisher | Wiley-VCH;ChemPubSoc Europe |
| Publisher Date | 2015-06-15 |
| Publisher Place | Germany |
| Access Restriction | Open |
| Subject Keyword | Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Catalysis |
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