Li, Yi-Ning; Liu, Ye; Yang, Han-Han; Zhang, Wen-Fu; Lu, Xiao-Bing published the artcile< Intramolecular Partners in Asymmetric Catalysis Copolymerization: Highly Enantioselective and Controllable at Enhanced Temperatures and Low Loadings>, Recommanded Product: 4-(4-Methoxyphenyl)-1-butanol, the main research area is asym catalyst polymerization enantioselective controllable alternating chiral; Asymmetric Ring-Opening Copolymerization; Bifuctional Bimetallic Catalyst; High Molecular Weight Polyester; Intramolecular Synergistic Catalysis; Low Loadings.
Asym. copolymerization of meso-epoxide and anhydride is a powerful strategy for preparing various isotactic polyesters with two contiguous stereogenic centers. However, the previous binary systems suffered from slow rates at low loadings, poor enantioselectivities and transesterification reactions at enhanced temperatures Herein, we report novel dinuclear aluminum complexes with multiple chiralities and ammonium salts anchored on ligand frameworks. These bifunctional catalysts exhibit high activities and enantioselectivities for epoxides/anhydrides copolymerizations at harsh conditions via intramolecularly synergistic catalysis, affording polyesters with unprecedented mol. weights and narrow distributions. Notably, no transesterification reactions were observed, significantly different from the binary catalyst/cocatalyst pairs. This study represents a rare example regarding temperature-independent asym. induction for preparing chiral polymers from achiral monomers.
Angewandte Chemie, International Edition published new progress about Chirality. 52244-70-9 belongs to class ethers-buliding-blocks, and the molecular formula is C11H16O2, Recommanded Product: 4-(4-Methoxyphenyl)-1-butanol.
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem