Ring opening polymerization of α-amino acid N-carboxyanhydrides catalyzed by rare earth catalysts: Polymerization characteristics and mechanism

2011 ◽  
Vol 50 (6) ◽  
pp. 1076-1085 ◽  
Author(s):  
Hui Peng ◽  
Jun Ling ◽  
Zhiquan Shen
Keyword(s):  
Rare Earth ◽  
Amino Acid ◽  
Ring Opening ◽  
Ring Opening Polymerization

Rare earth metal initiated ring-opening polymerization of lactones

2000 ◽  
Vol 21 (5) ◽  
pp. 195-212 ◽  
Author(s):  
Seema Agarwal ◽  
Christian Mast ◽  
Kurt Dehnicke ◽  
Andreas Greiner
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Ring Opening ◽  
Earth Metal ◽  
Ring Opening Polymerization

Synthesis of Rare Earth Catalyst LLa[N(TMS)2]•DME(L=3,5-But2-2-HO-C6H2CH-NH-C5H4N) and Catalytic Behavior for Polymerization of Rac-Lactide

2012 ◽  
Vol 184-185 ◽  
pp. 1302-1306
Author(s):  
Xi Zhu ◽  
Yao Rong Wang
Keyword(s):  
Rare Earth ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Molar Ratio ◽  
Elimination Reaction ◽  
Catalytic Behavior ◽  
Rare Earth Catalyst

A dianionic phenoxyamido ligand was the first to be used to stabilize organo-rare-earth mental amido complex. Amine elimination reaction of La[N(SiMe3)2]3(THF)2 with 3,5-But2-2-HO-C6H2CH-NH-C5H4N in a 1 : 1 molar-ratio gave the anionic phenoxyamido neodymium amide LLa[N(TMS)2]•DME (1) in a high isolated yield. Furthemore, the catalytic behavior of complex 1 for the ring-opening polymerization of rac-lactide was explored.

Rare-Earth Complexes with Multidentate Tethered Phenoxy-Amidinate Ligands: Synthesis, Structure, and Activity in Ring-Opening Polymerization of Lactide

2011 ◽  
Vol 30 (20) ◽  
pp. 5509-5523 ◽  
Author(s):  
Mikhail Sinenkov ◽  
Evgeny Kirillov ◽  
Thierry Roisnel ◽  
Georgy Fukin ◽  
Alexander Trifonov ◽  
...  
Keyword(s):  
Rare Earth ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Rare Earth Complexes ◽  
Structure And Activity

Amido rare-earth(iii) and Ca(ii) complexes coordinated by tridentate amidinate ligands: synthesis, structure, and catalytic activity in the ring-opening polymerization of rac-lactide and ε-caprolactone

2020 ◽  
Vol 44 (19) ◽  
pp. 7811-7822
Author(s):  
Natalia Yu. Rad’kova ◽  
Tatyana A. Kovylina ◽  
Andrei S. Shavyrin ◽  
Anton V. Cherkasov ◽  
Georgy K. Fukin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Ring Opening ◽  
Ring Opening Polymerization

Y(iii), Sm(iii) and Ca(ii) monoamido complexes coordinated by tridentate amidinate ligand were synthesized and evaluated as initiators of ring-opening polymerization of rac-lactide and ε-caprolactone.

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