Yttrium Phosphasalen Initiators for rac-Lactide Polymerization: Excellent Rates and High Iso-Selectivities

被引：201

作者：

Bakewell, Clare ^{[1
]}

Thi-Phuong-Anh Cao ^{[2
]}

Long, Nicholas ^{[1
]}

Le Goff, Xavier F. ^{[2
]}

Auffrant, Audrey ^{[2
]}

Williams, Charlotte K. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

[2] Ecole Polytech, CNRS, Lab Heteroelements & Coordinat, F-9118 Palaiseau, France

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2012年 / 134卷 / 51期

基金：

英国工程与自然科学研究理事会;

关键词：

RING-OPENING POLYMERIZATION; RACEMIC LACTIDE; STEREOSELECTIVE POLYMERIZATION; STEREOCOMPLEX FORMATION; LIGAND SYNTHESIS; COMPLEXES; ALUMINUM; CATALYSTS; ALKOXIDE; STEREOCONTROL;

D O I：

10.1021/ja310003v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Highly active yttrium phosphasalen initiators for the stereocontrolled ring-opening polymerization of rac-lactide are reported. The initiators are coordinated by a new class of ancillary ligand: an iminophosphorane derivative of the popular "salen" ligand, termed "phosphasalen". Changing the phosphasalen structure enables access to high iso-selectivities (P-i = 0.84) or hetero-selectivities (P-s = 0.87). The initiators also show very high rates, excellent polymerization control, and tolerance to low loadings; furthermore, no chiral auxiliaries/ligands are needed for the stereocontrol. The combination of such high rates with high iso-selectivities is very unusual.

引用

页码：20577 / 20580

页数：4

共 45 条

[1] Yttrium Phosphasalen Initiators for rac-Lactide Polymerization
Bakewell, Clare
Thi-Phuong-Anh Cao
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Williams, Charlotte K.
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[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2017, 56 (19) : 5277 - 5282
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[J]. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2017, 253
[4] Bis(quinolinolato)aluminium ethyl and yttrium phosphasalen complexes: New iso-selective initiators for rac-lactide ring-opening polymerisation
Bakewell, Clare M.
Thi-Phuong-Anh Cao
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