Living Ring-Opening Metathesis Polymerization of Norbornenes Containing Acetyl-Protected Carbohydrates Using Well-Defined Molybdenum and Ruthenium Initiators

✍ Scribed by Kotohiro Nomura; Ichiro Sakai; Yukio Imanishi; Michiya Fujiki; Yoshitaka Miyamoto

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 130 KB
• Volume: 25
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200300098

✦ Synopsis

Abstract

Summary: Homopolymers and diblock copolymers that contain maltose or glucose residues have been prepared by ring‐opening metathesis polymerization of norbornene derivatives using a molybdenum–alkylidene initiator, Mo(CHCMe~2~Ph)(N‐2,6‐__i__Pr~2~C~6~H~3~)(O__t__Bu)~2~ (A). These polymerizations took place not only in a living fashion ($\overline M _{\rm w} /\overline M _{\rm n}$ = < 1.2) but also with almost quantitative initiation. Two types of ruthenium initiators, (Cy~3~P)~2~RuCl~2~(CHPh) (B) and (IMesH~2~)(Cy~3~P)RuCl~2~(CHPh) (C), have also been used to compare initiator performance under the same conditions.

Structures for the polymers studied here.

imageStructures for the polymers studied here.