Amino Acid-Bearing ROMP Polymers with a Stereoregular Backbone
摘要:
The ruthenium-catalyzed ring-opening polymerization (ROMP) of 1-cyclobutenecarbonyl glycine methyl ester provides translationally invariant, head-to-tail ordered polymers. This polybutadiene backbone contains (within the limits of detection) only E-trisubstituted olefins, and it has no stereocenters that would serve as a source of structural ambiguities. Characterization of the polymer products indicates that they have polydispersities ranging from 1.2 to 1.6 and suggests that they are the products of a "living" polymerization. 1-Cyclobutenecarboxamide-derived ROMP polymers are excellent prospects for applications that require stereoregular chains functionalized with polar ligands.
Scope of the Ring-Opening Metathesis Polymerization (ROMP) Reaction of 1-Substituted Cyclobutenes
作者:Airong Song、Jae Chul Lee、Kathlyn A. Parker、Nicole S. Sampson
DOI:10.1021/ja1037098
日期:2010.8.4
carboxamides, and carbinol esters) were investigated as substrates for ring-opening metathesis polymerization (ROMP) with [(H(2)IMes)(3-Br-pyridine)(2)(Cl)(2)Ru=CHPh]. Both the secondary amides of 1-cyclobutenecarboxylic acid and the esters of 1-cyclobutene-1-methanol undergo polymerization. The secondary amides provide translationally invariant polymers (E-olefins). Although the carbinol esters yield stereo-
[EN] The invention relates to stereoregular ROMP polymers, the monomers used to make them, and the processes used to convert the monomers to the polymers. The monomer has formula (1) : wherein: X = [(CY12) [FR] L'invention concerne des polymères ROMP stéréoréguliers, les monomères utilisés pour les fabriquer et les procédés utilisés pour convertir les monomères en les polymères. Le monomère a la formule (1) : dans laquelle : X = [(CY12)