Experimental and Computational Studies on the Mechanism of Zwitterionic Ring-Opening Polymerization of δ-Valerolactone with N-Heterocyclic Carbenes

2014 ◽  
Vol 118 (24) ◽  
pp. 6553-6560 ◽  
Author(s):  
Ashwin K. Acharya ◽  
Young A. Chang ◽  
Gavin O. Jones ◽  
Julia E. Rice ◽  
James L. Hedrick ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Heterocyclic Carbenes ◽  
Computational Studies

N-Heterocyclic Carbenes for the Organocatalytic Ring-Opening Polymerization of ε-Caprolactone

2009 ◽  
Vol 42 (5) ◽  
pp. 1634-1639 ◽  
Author(s):  
Nahrain E. Kamber ◽  
Wonhee Jeong ◽  
Silvia Gonzalez ◽  
James L. Hedrick ◽  
Robert M. Waymouth
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Heterocyclic Carbenes

Ring-Opening Polymerization and Copolymerization of Propylene Oxide Catalyzed by N-Heterocyclic Carbenes

ChemCatChem ◽  
2014 ◽  
Vol 6 (2) ◽  
pp. 618-625 ◽  
Author(s):  
Ronald Lindner ◽  
Michael L. Lejkowski ◽  
Séverine Lavy ◽  
Peter Deglmann ◽  
Kerstin T. Wiss ◽  
...  
Keyword(s):  
Propylene Oxide ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Heterocyclic Carbenes

Heterogeneous catalysts based on built-in N-heterocyclic carbenes with high removability, recoverability and reusability for ring-opening polymerization of cyclic esters

2019 ◽  
Vol 10 (12) ◽  
pp. 1526-1536 ◽  
Author(s):  
Wen Liu ◽  
Guo-Qiang Tian ◽  
Dan-Dan Yang ◽  
Gang Wu ◽  
Si-Chong Chen ◽  
...  
Keyword(s):  
Ring Opening ◽  
Heterogeneous Catalysts ◽  
Ring Opening Polymerization ◽  
Heterocyclic Carbenes ◽  
Catalytic Systems ◽  
Cyclic Esters ◽  
Metal Free ◽  
Critical Issues ◽  
New Generation

Both activity and reusability are critical issues for developing new generation metal-free catalytic systems.

Ring-opening polymerization by N-heterocyclic carbenes as catalysts: Characteristics and kinetics

2014 ◽  
Vol 55 (4) ◽  
pp. 416-421
Author(s):  
Y. Wang ◽  
N. Li ◽  
L. Zhang ◽  
J. Guo ◽  
Q. Liu
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Heterocyclic Carbenes

Recent Advances in Ring-Opening Polymerization of O-Carboxyanhydrides

Synlett ◽  
2017 ◽  
Vol 28 (15) ◽  
pp. 1857-1866 ◽  
Author(s):  
Linghai Xie ◽  
Rong Tong ◽  
Quanyou Feng ◽  
Yongliang Zhong
Keyword(s):  
Biodegradable Polymers ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Heterocyclic Carbenes ◽  
Organometallic Complexes ◽  
Hydroxy Acids ◽  
Organometallic Catalysts ◽  
Pyridine Base ◽  
Recent Advances

Poly(α-hydroxy acids) are important biodegradable polymers with wide applications. Recently O-carboxyanhydrides (OCAs) have emerged as promising monomer equivalents of lactides to synthesize poly(α-hydroxy acids). We will highlight recent advances in controlled ring-opening polymerization of OCAs catalyzed by organocatalysts, enzymes, or organometallic complexes.1 Introduction2 Organocatalysts for O-Carboxyanhydride Polymerization2.1 Synthesis of O-Carboxyanhydride Monomers2.2 Ring-Opening Polymerization of O-Carboxyanhydrides Catalyzed by 4-Dimethylaminopyridine2.3 Epimerization in the Ring-Opening Polymerization of O-Carboxyanhydrides Catalyzed by the Pyridine Base2.4 N-Heterocyclic Carbenes for Ring-Opening Polymerization of O-Carboxyanhydrides3 Enzymes for O-Carboxyanhydride Polymerization4 Organometallic Catalysts for O-Carboxyanhydride Polymerization4.1 Early Efforts4.2 Ring-Opening Polymerization Catalyzed by Zn Complexes4.3 Photoredox Ring-Opening Polymerization Catalyzed by Zn/Ni Complexes5 Conclusion and Perspective

Catalytic activity of N-heterocyclic carbenes in ring opening polymerization of cyclic siloxanes

2007 ◽  
Vol 692 (4) ◽  
pp. 705-708 ◽  
Author(s):  
Marta Rodriguez ◽  
Sebastien Marrot ◽  
Tsuyoshi Kato ◽  
Sébastien Stérin ◽  
Etienne Fleury ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Heterocyclic Carbenes ◽  
Cyclic Siloxanes

Group 13 metal (Al, Ga, In) alkyls supported by N -heterocyclic carbenes for use in lactide ring-opening polymerization catalysis

2017 ◽  
Vol 289 ◽  
pp. 204-210 ◽  
Author(s):  
Gilles Schnee ◽  
Anaëlle Bolley ◽  
Frédéric Hild ◽  
David Specklin ◽  
Samuel Dagorne
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Heterocyclic Carbenes ◽  
Group 13 ◽  
Polymerization Catalysis
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