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Polymerization of Various Alkyl Diazoacetates Initiated with (N-Heterocyclic Carbene)Pd/Borate Systems

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journal contribution
posted on 10.05.2011, 00:00 by Eiji Ihara, Hiroki Takahashi, Masaki Akazawa, Tomomichi Itoh, Kenzo Inoue
(NHC)Pd/borate initiating systems (NHC = N-heterocyclic carbene) were applied for polymerization of alkyl diazoacetates with a variety of ester groups. The monomers with n-hexyl, cyclohexyl, benzyl, and cholesteryl group as an ester group were transformed into the corresponding poly(alkoxycarbonylmethylene)s with Mn > 10 000. On the other hand, the polymerization of 1-adamantyl diazoacetate afforded low-Mn polymers (Mn < 4000), probably because of steric reasons. Copolymerization of a few comonomer combinations also proceeded successfully to give copolymers with Mn > 20 000.