While the polymerization of 2-oxazolines has provided a strong platform for the synthesis of linear polyethylenimine (LPEI), there is room for improvement. The polymerization of 2-oxazolines suffers from decreased control at high molecular weights as well as difficulties removing 100% of the acyl protecting groups to yield LPEI. Recently, we have produced LPEI through a controlled, living anionic ring-opening polymerization of sulfonylaziridines.<sup>1,2</sup> This finding improves upon the previous route, which utilizes 2-oxazolines, by allowing for increased control at high degrees of polymerization as well as narrower molecular weight distributions.

Anionic ring-opening polymerization of activated aziridines to produce linear polyethylenimine

2019 Spring National Meeting

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