Synthesis, Characterization, and Catalytic Application of Aluminum Anilido‐Oxazolinate Complexes

Abstract

Abstract A family of aluminum complexes containing anilido‐oxazolinate ligands are described. Reactions of five anilido‐oxazolinate ligand precursors, HNPh TriMe Oxa, HNPh Di i Pr Oxa, HNPh OMe Oxa, HNPh SMe Oxa, or HNPhOxa, with 1 molar equiv. of AlMe 3 in toluene give the aluminum dimethyl complexes (NArOxa)AlMe 2 [Ar = 2,4,6‐trimethylphenyl, (NPh TriMe Oxa)AlMe 2 ( 1 ); Ar = 2,6‐diisopropylphenyl, (NPh Di i Pr Oxa)AlMe 2 ( 2 ); Ar = 2‐methoxyphenyl, (NPh OMe Oxa)AlMe 2 ( 3 ); Ar = 2‐methylthiophenyl, (NPh SMe Oxa)AlMe 2 ( 4 ); Ar = phenyl, (NPhOxa)AlMe 2 ( 5 ), respectively]. The molecular structures are reported for compounds 1 – 4 . Their catalytic activities toward the ring‐opening polymerization reactions of L ‐lactide or ϵ‐caprolactone in the presence of BnOH are also under investigation. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)