The anionic ring opening polymerizations (AROP) of N-sulfonyl aziridines afford polysulfonylaziridines. Polysulfonylaziridines are precursors for linear polyethyleneimine, linear polypropyleneimine, and related polyimines. Prior attempts at preparing chiral polysulfonylaziridines from enantiopure N-sulfonyl aziridines resulted in poorly characterized, insoluble material. In this work, we establish conditions that allowed for the AROP of chiral N-sulfonyl aziridines, affording previously inaccessible chiral polysulfonylaziridines, and providing a potential pathway to chiral linear polypropyleneimine and other chiral polyimines.

Anionic ring opening polymerization of chiral N-sulfonyl aziridines

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