Phosphasalen Indium Complexes Showing High Rates and Isoselectivities in rac-Lactide Polymerizations

被引：88

作者：

Myers, Dominic ^{[1
]}

White, Andrew J. P. ^{[1
]}

Forsyth, Craig M. ^{[2
]}

Bown, Mark ^{[3
]}

Williams, Charlotte K. ^{[4
]}

机构：

[1] Imperial Coll London, Dept Chem, London SW7 2AZ, England

[2] Monash Univ, Sch Chem, Clayton, Vic 3800, Australia

[3] CSIRO Mfg, Bayview Ave, Clayton, Vic 3168, Australia

[4] Univ Oxford, Dept Chem, 12 Mansfield Rd, Oxford OX1 3TA, England

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2017年 / 56卷 / 19期

基金：

英国工程与自然科学研究理事会;

关键词：

indium; isoselectivity; polymerization; structure elucidation; synthetic methods; RING-OPENING POLYMERIZATION; AMINOPHENOLATE ZINC-COMPLEXES; POLY(LACTIC ACID); RACEMIC LACTIDE; CYCLIC ESTERS; STEREOSELECTIVE POLYMERIZATION; DIASTEREOSELECTIVE SYNTHESIS; ALUMINUM COMPLEXES; LIGANDS; CATALYST;

D O I：

10.1002/anie.201701745

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polylactide (PLA) is the leading bioderived polymer produced commercially by the metal-catalyzed ring-opening polymerization of lactide. Control over tacticity to produce stereoblock PLA, from rac-lactide improves thermal properties but is an outstanding challenge. Here, phosphasalen indium catalysts feature high rates (30 +/- 3m(-1)min(-1), THF, 298K), high control, low loadings (0.2mol%), and isoselectivity (P-i=0.92, THF, 258K). Furthermore, the phosphasalen indium catalysts do not require any chiral additives.

引用

页码：5277 / 5282

页数：6

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