Bypassing the lack of reactivity of endo-substituted norbornenes with the catalytic rectification-insertion mechanism.

ABSTRACT: The catalytic 1,2-insertion polymerization of polar norbornenes (NBEs) leads to the formation of functional rigid macromolecules with exceptional thermal, optical and mechanical properties. However, this remarkable reaction is plagued by the low reactivity of the polar monomers, and most notably of those bearing a functional group in endo position. We have examined the polymerization mechanism of NBEs bearing one or two CO₂Me groups either in exo or endo position catalyzed by the so-called naked allyl Pd⁺ SbF₆^- catalyst (1). Although endo dimethyl ester of 5-norbornene-2,3-dicarboxylic acid (NBE(CO₂Me)₂) is polymerized by 1, two endo units are never inserted consecutively alon

SUBMITTER: Commarieu B 

PROVIDER: S-EPMC5701727 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature