Cationic ring-opening polymerization azetidines

Polyamines can also be synthesized by cationic ring-opening polymerization of ethyleneimines (aziridines), trimethyleneimines (azetidines), and 2-oxazolines. 

Higher homologs of PEI can be obtained by cationic ring-opening polymerization of azetidine monomers21). Polymers of this kind can also be N-methylated as previously described in the case of PEI. The cationic polymerization of N-substituted azetidines may give rise to poly(tertiary amine)s. Linear poly(tertiary amine)s have been obtained by selective dealkylation of poly(quaternary ammonium salt)s22). 

In the cationic ring-opening polymerization of unsubstitued azetidine (i 78ai a proton is tranrferred from the ffimeric km (i 78c) to the monomer molecule. This wocess leads to unexpected structure of the polymeric badcbone ) ... 

Poly(l-azabicyclo[4.2.0]octane) (polyconidine) was synthesized with bromo-acetic acid using microwave irradiation (Karabulut et al., 2008). 1-Azabicyclo[4.2.0] octane contains unsubstituted four-membeied azetidine ring. It was synthesized with microwave-assisted methods and used in cationic ring-opening polymerization as a monomer. 

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See also in sourсe #XX -- [ ]

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