Hyperbranched 5,6-glucan as reducing sugar ball

Abstract

Reducing sugar ball Au (III)Au (0) A hyperbranched glycopolymer arranged with numerous reducing D-glucose units on the peripheries of the polymer, i.e., "reducing sugar ball", possessed a higher reducing ability than D-glucose because of the glyco-cluster effect or the multivalent effect of the D-glucose units.2Abstract. The ring-opening polymerization of 5,6-anhydro-1,2-O-isopropylidene--D-glucofuranose (1) as a latent cyclic AB 2 -type monomer was carried out using potassium tert-butoxide (t-BuOK) or boron trifluoride diethyletherate (BF 3 ·OEt 2 ) as an initiator in order to synthesize a novel hyperbranched glycopolymer. The anionic and cationic polymerizations proceeded via the proton-transfer reaction mechanism to produce the hyperbranched poly(5,6-anhydro-1,2-O-isopropylidene--D-glucofuranose) (2). In particular, the cationic polymerization with the slow-monomer-addition strategy is a facile method leading to the hyperbranched glycopolymers with high molecular weights and highly branched

Synthesis of hyperbranched polymers and their applications in analytical chemistry

“…30,31 To date, numerous HBPs have been synthesized by the SMA method, for example, hyperbranched poly(siloxysilane), 32 hyperbranched polyglycerol, [33][34][35] and hyperbranched glycopolymer. 36 Monomers used in SAM and polymerization results such as molecular weight (M w ) and polydispersity index (PDI, M w /M n ) are summarized in Table 1.…”

Synthesis of Hyperbranched Polymer Using Slow Monomer Addition Method

“…Glycopolymer. Tamaki and coworkers reported the cationic ring-opening multibranching polymerization of 5,6-anhydro-1,2-O-isopropylideneα-d-glucofuranose as a latent cyclic AB 2 -type monomer using BF 3 •OEt 2 as an initiator in order to synthesize a novel hyperbranched glycopolymer, as shown in Scheme 8 [39]. The cationic polymerization without the SMA method produced the glycopolymer with M w = 15000 g•moL −1 and PDI = 1.45.…”