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Chemistry of 2-oxazolines.

Oxazolines are five-membered cyclic compounds with an endo-imino ether group. They belong to one of the classes of cyclic imino ethers, which contain cyclic endo- and exo-imino ethers of 5-, 6-, and 7-membered rings. The chemistry of 2-oxazolines is involved in the polymer synthesis fields of cationic ring-opening polymerization (CROP) and enzymatic ring-opening polyaddition (EROPA), although both polymerizations look to be quite a different class of reaction. The key for polymerization to proceed is a combination of the catalyst (initiator) and the design of monomers. This article describes recent developments in polymer synthesis via these two types of polymerization to afford various functional polymers with completely different structures, poly(N-acylethylenimine)s via CROP and 2-amino-2-deoxy sugar-unit-containing oligo and polysaccharides via EROPA. From the viewpoint of reaction mode, an acid-catalyzed ring-opening polyaddition (ROPA) is considered to be the crossover where CROP and EROPA meet.

S. Kobayashi et al., J. Polym. Sci. Part A

DOI: 10.1002/pola.2B906
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Title Annotation:Materials Views
Author:Ladden, S.
Publication:Plastics Engineering
Article Type:Brief article
Geographic Code:1USA
Date:May 1, 2010
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