Asymmetric Alternating Copolymerization of Meso-epoxides and Cyclic Anhydrides: Efficient Access to Enantiopure Polyesters
Release time:2019-03-13
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期刊论文
First Author:
Li, Jie
Correspondence Author:
Lu, XB (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China.
Co-author:
Liu, Ye,Ren, Wei-Min,Lu, Xiao-Bing
Date of Publication:
2016-09-14
Journal:
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Included Journals:
SCIE、EI、PubMed、Scopus
Document Type:
J
Volume:
138
Issue:
36
Page Number:
11493-11496
ISSN No.:
0002-7863
Abstract:
Synthesis of stereoregular polyesters with main-chain chirality was achieved for the first time by the asymmetric copolymerization of meso-epoxides and cyclic anhydrides using catalyst systems based on enantiopure bimetallic, complexes. The combination of the biphenol-linked dinuclear aluminum complex with tert-butyl groups-in the phenolate ortho-positions and a nucleophilic co-catalyst was found to be more efficient in catalyzing this asymmetric copolymerization, affording enantiomerically enriched polyesters (up to 91% ee) with completely alternating structure and narrow molecular weight distribution. It was discovered that the isotactic-enriched poly(cyclopentene phthalate) is a typical semicrystalline material with a melting endothermic peak at 221 degrees C. This study is expected to provide a promising route to prepare various stereoregular polyesters having a wide variety of physical properties and degradability.
Translation or Not:
no
