Bifunctional yttrium(III) and titanium(IV) NHC catalysts for lactide polymerisation.
Lewis acidic yttrium(III) and titanium(IV) derivatives of anionic, metal-tethered carbenes apparently act as bifunctional catalysts for the polymerisation of D,L-lactide, using a combination of Lewis acid and base functionalities to initiate ring opening of the cyclic monomer; the alcohol- and amino-functionalised carbenes from which they derive provide models for the first insertion step, and also display metal-free polymerisation catalysis to generate polylactic acid.
Patel
Dipti
D
University of Nottingham, University Park, Nottingham, UK.
Liddle
Stephen T
ST
Mungur
Shaheed A
SA
Rodden
Mark
M
Blake
Alexander J
AJ
Arnold
Polly L
PL