Yttrium phosphasalen initiators for rac -lactide polymerization: Excellent rates and high iso-selectivities

Clare Bakewell; Thi Phuong Anh Cao; Nicholas Long; Xavier F. Le Goff; Audrey Auffrant; Charlotte K. Williams

doi:10.1021/ja310003v

Yttrium phosphasalen initiators for rac -lactide polymerization: Excellent rates and high iso-selectivities

Clare Bakewell, Thi Phuong Anh Cao, Nicholas Long, Xavier F. Le Goff, Audrey Auffrant, Charlotte K. Williams

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	20577-20580
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	134
Issue number	51
DOIs	https://doi.org/10.1021/ja310003v
Publication status	Published - 26 Dec 2012
Externally published	Yes

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title = "Yttrium phosphasalen initiators for rac -lactide polymerization: Excellent rates and high iso-selectivities",

abstract = "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 (Pi = 0.84) or hetero-selectivities (Ps = 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.",

author = "Clare Bakewell and Cao, \{Thi Phuong Anh\} and Nicholas Long and \{Le Goff\}, \{Xavier F.\} and Audrey Auffrant and Williams, \{Charlotte K.\}",

year = "2012",

month = dec,

day = "26",

doi = "10.1021/ja310003v",

language = "English",

volume = "134",

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journal = "Journal of the American Chemical Society",

issn = "0002-7863",

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TY - JOUR

T1 - Yttrium phosphasalen initiators for rac -lactide polymerization

T2 - Excellent rates and high iso-selectivities

AU - Bakewell, Clare

AU - Cao, Thi Phuong Anh

AU - Long, Nicholas

AU - Le Goff, Xavier F.

AU - Auffrant, Audrey

AU - Williams, Charlotte K.

PY - 2012/12/26

Y1 - 2012/12/26

N2 - 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 (Pi = 0.84) or hetero-selectivities (Ps = 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.

AB - 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 (Pi = 0.84) or hetero-selectivities (Ps = 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.

U2 - 10.1021/ja310003v

DO - 10.1021/ja310003v

M3 - Article

C2 - 23231748

AN - SCOPUS:84871600384

SN - 0002-7863

VL - 134

SP - 20577

EP - 20580

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 51

ER -

Yttrium phosphasalen initiators for rac -lactide polymerization: Excellent rates and high iso-selectivities

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