Authors Voit, B. ; Fleischmann, S. ; Komber, H. ; Scheel, A. ; Stumpe, K.
Title Cycloaddition reactions and dendritic polymer architectures - a perfect match
Date 15.08.2007
Number 15087
Abstract The potential of cycloaddition (CA) reactions for the synthesis of dendritic polymers is pointed out. The [4 + 2] Diels Alder cycloaddition as well as 1,3-dipolar CA reactions including click chemistry are addressed, and the advantages of these reactions like high selectivity, thus high tolerance towards additional functionalities, high yields and synthesis under mild reaction conditions are highlighted. New perfectly branched dendrimers as well as hyperbranched polymers have been prepared and modified using the 1,3-dipolar cycloaddition reaction of azines with alkynes. The 1,3-dipolar CA reaction of bisazine with maleimides results in hyperbranched and thus, irregular and broadly distributed polymers though with a degree of branching of 100% due to special intermediate formation. The [4 + 2] Diels Alder cycloaddition was successfully applied for the synthesis of highly branched polyphenylene structures using the AB2 + AB and the A2 + B3 approach. CA reactions are also very suitable for highly efficient polymer analogous reactions and thus, they can also be used to prepare complex polymer architectures like dendronized polymers.
Publisher Macromolecular Symposia
Citation Macromolecular Symposia 254 (2007) 16-24
Tags cycloaddition reactions dendritic polymers dendronized polymers hyperbranched polymers polymer analogous reaction hyperbranched polymers 1 3-dipolar cycloaddition polyphenylene dendrimers ab(2) monomers route 100-percent fabrication chemistry ligation alk

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