Controlled ring-opening polymerization of α-amino acid N-carboxy-anhydride by frustrated amine/borane Lewis pairs

2017 ◽  
Vol 53 (37) ◽  
pp. 5155-5158 ◽  
Author(s):  
Hongyuan Zhang ◽  
Yanzhao Nie ◽  
Xinmei Zhi ◽  
Haifeng Du ◽  
Jing Yang
Keyword(s):  
Amino Acid ◽  
Lewis Acid ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Amine Groups ◽  
Lewis Pairs

An FLP intermediate formed through the bulky borane Lewis acid and the amine groups of the propagation chain end controlled the ring-opening polymerization of α-amino acid N-carboxy-anhydride monomers.

Controlled ring-opening polymerization ofl-lactide and ε-caprolactone catalyzed by aluminum-based Lewis pairs or Lewis acid alone

2016 ◽  
Vol 55 (2) ◽  
pp. 297-303 ◽  
Author(s):  
Yuushou Nakayama ◽  
Shunsuke Kosaka ◽  
Kentaro Yamaguchi ◽  
Gentaro Yamazaki ◽  
Ryo Tanaka ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Lewis Pairs

Insights into the mechanism for ring-opening polymerization of lactide catalyzed by Zn(C6F5)2/organic superbase Lewis pairs

2016 ◽  
Vol 6 (21) ◽  
pp. 7763-7772 ◽  
Author(s):  
Xiao-Qing Li ◽  
Bin Wang ◽  
He-Yuan Ji ◽  
Yue-Sheng Li
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Experimental Results ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Good Consistency ◽  
Plausible Mechanism ◽  
Tof Ms ◽  
Lewis Pairs

A plausible mechanism for ring-opening polymerization of lactide catalyzed by Zn(C6F5)2-based Lewis pairs was proposed based on in situ NMR and MALDI-TOF MS analyses. Several experimental results show very good consistency with the proposed mechanism.

Ring-Opening Polymerization of Lactides Catalyzed by Natural Amino-Acid Based Zinc Catalysts

2010 ◽  
Vol 49 (5) ◽  
pp. 2360-2371 ◽  
Author(s):  
Donald J. Darensbourg ◽  
Osit Karroonnirun
Keyword(s):  
Amino Acid ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Natural Amino Acid

A new route for the preparation of enriched iso-polylactide from rac-lactide via a Lewis acid catalyzed ring-opening of an epoxide

2017 ◽  
Vol 46 (18) ◽  
pp. 5938-5945 ◽  
Author(s):  
Mathew Anker ◽  
Choumini Balasanthiran ◽  
Vagulejan Balasanthiran ◽  
Malcolm H. Chisholm ◽  
Savithra Jayaraj ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Selective Ring Opening ◽  
Acid Catalyzed

Al(iii) acts as a Lewis acid for the ring-opening of an epoxide by Cl− attack and this yields stereo selective ring-opening polymerization of rac-lactide to yield iso-polylactide.

scholarly journals Random Poly(Amino Acid)s Synthesized by Ring Opening Polymerization as Additives in the Biomimetic Mineralization of CaCO3

Polymers ◽  
2012 ◽  
Vol 4 (2) ◽  
pp. 1195-1210 ◽  
Author(s):  
Vladimir Dmitrovic ◽  
Gijs J.M. Habraken ◽  
Marco M.R.M. Hendrix ◽  
Wouter J.E.M. Habraken ◽  
Andreas Heise ◽  
...  
Keyword(s):  
Amino Acid ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Biomimetic Mineralization
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