Literature DB >> 23231748

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

Clare Bakewell1, Thi-Phuong-Anh Cao, Nicholas Long, Xavier F Le Goff, Audrey Auffrant, Charlotte K Williams.   

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.

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Year:  2012        PMID： 23231748     DOI： 10.1021/ja310003v

Source DB:  PubMed          Journal:  J Am Chem Soc        ISSN： 0002-7863            Impact factor:   15.419


  10 in total

1.  Metal-size influence in iso-selective lactide polymerization.

Authors:  Clare Bakewell; Andrew J P White; Nicholas J Long; Charlotte K Williams
Journal:  Angew Chem Int Ed Engl       Date:  2014-07-07       Impact factor: 15.336

2.  Zinc-Catalyzed Highly Isoselective Ring Opening Polymerization of rac-Lactide.

Authors:  Srinivas Abbina; Guodong Du
Journal:  ACS Macro Lett       Date:  2014-07-02       Impact factor: 6.903

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

Authors:  Dominic Myers; Andrew J P White; Craig M Forsyth; Mark Bown; Charlotte K Williams
Journal:  Angew Chem Int Ed Engl       Date:  2017-04-05       Impact factor: 15.336

4.  Stereoselective photoredox ring-opening polymerization of O-carboxyanhydrides.

Authors:  Quanyou Feng; Lei Yang; Yongliang Zhong; Dong Guo; Guoliang Liu; Linghai Xie; Wei Huang; Rong Tong
Journal:  Nat Commun       Date:  2018-04-19       Impact factor: 14.919

5.  Metal influence on the iso- and hetero-selectivity of complexes of bipyrrolidine derived salan ligands for the polymerisation of rac-lactide.

Authors:  Matthew D Jones; Lauren Brady; Paul McKeown; Antoine Buchard; Pascal M Schäfer; Lynne H Thomas; Mary F Mahon; Timothy J Woodman; John P Lowe
Journal:  Chem Sci       Date:  2015-06-17       Impact factor: 9.825

6.  Isoselective Lactide Ring Opening Polymerisation using [2]Rotaxane Catalysts.

Authors:  Jason Y C Lim; Nattawut Yuntawattana; Paul D Beer; Charlotte K Williams
Journal:  Angew Chem Int Ed Engl       Date:  2019-03-28       Impact factor: 15.336

7.  Towards a selective synthetic route for cobalt amino acid complexes and their application in ring opening polymerization of rac-lactide.

Authors:  Andrés Castro Ruiz; Krishna K Damodaran; Sigridur G Suman
Journal:  RSC Adv       Date:  2021-05-04       Impact factor: 4.036

8.  Dizinc Lactide Polymerization Catalysts: Hyperactivity by Control of Ligand Conformation and Metallic Cooperativity.

Authors:  Arnaud Thevenon; Charles Romain; Michael S Bennington; Andrew J P White; Hannah J Davidson; Sally Brooker; Charlotte K Williams
Journal:  Angew Chem Int Ed Engl       Date:  2016-06-13       Impact factor: 15.336

9.  Overcoming aggregation in indium salen catalysts for isoselective lactide polymerization.

Authors:  D C Aluthge; J M Ahn; P Mehrkhodavandi
Journal:  Chem Sci       Date:  2015-07-06       Impact factor: 9.825

10.  Facile Preparation of Stereoblock PLA From Ring-Opening Polymerization of rac-Lactide by a Synergetic Binary Catalytic System Containing Ureas and Alkoxides.

Authors:  Ze Kan; Wenlong Luo; Tong Shi; Chuanzhi Wei; Binghao Han; Dejuan Zheng; Shaofeng Liu
Journal:  Front Chem       Date:  2018-11-09       Impact factor: 5.221
  10 in total

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