1370529-99-9Relevant academic research and scientific papers
Anilido-aldimine aluminum complexes: Synthesis, characterization and lactide polymerization
Allan, Laura E.N.,Bélanger, Justin A.,Callaghan, Laura M.,Cameron, Donald J.A.,Decken, Andreas,Shaver, Michael P.
experimental part, p. 106 - 112 (2012/06/18)
The synthesis of six bimetallic dimethyl aluminum anilido-aldimine complexes, active for the ring opening polymerization of rac-lactide, is reported. An efficient synthetic route to these ligands utilizing isolated lithium amide salts allows for the synthesis of novel cyclohexylamide- substituted ligands, as well as improving the yields of diisopropylphenylamino- substituted ligands, with both ethyl and propyl backbones. Less sterically encumbered methylamide-substituted ligands were prepared through the condensation of ortho-methylaminobenzaldehyde with the appropriate diamine. A monometallic intermediate species, L(AlMe2), was isolated and crystallographically characterized, illustrating the preference these ligands display for bis(bidentate) coordination. L(AlMe2)2 complexes 8-13 are efficient mediators of the ring opening polymerization of rac-lactide, with solution polymerizations displaying first-order rate constants, molecular weights very close to the theoretical values and polydispersity indexes as low as 1.07.
