A Facile, Controlled Synthesis of Soluble Star Polymers Containing a Sugar Residue by Ring‐Opening Metathesis Polymerization (ROMP)

Abstract

Abstract Summary: Precise syntheses of soluble star polymers containing a sugar residue could be attained by adopting sequential ring‐opening metathesis polymerizations of norbornene, 1,4,4a,5,8,8a‐hexahydro‐1,4,5,8‐ exo ‐ endo ‐dimethanonaphtalene, and then 1,2:3,4‐di‐ O ‐isopropylidene‐α‐D‐galacto‐pyranos‐6‐ O ‐yl 5‐norbornene‐2‐carboxylate using Mo(CHCMe 2 Ph)(N‐2,6‐ i Pr 2 C 6 H 3 )(O t Bu) 2 . The resultant polymers possessed uniform molecular weight distributions, and the M n values could be varied by the monomer/Mo molar ratios; their spherical images were observed in the TEM micrographs.