ISSN:
0360-6376
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The cationic, ring-opening polymerization of 1,6-anhydro-3,4-di-O-benzyl-2-deoxy-β-D-arabino-hexopyranose (ABDA) (=1,6-anhydro-3,4-di-O-benzyl-2-deoxy-β-D-glucopyranose) was investigated with Lewis acid as catalyst. Phosphorus pentafluoride at -78°C caused polymerization to a highly stereoregular (1 → 6)-α-linked polysaccharide. Effects of C-2 substituent on the polymerization of 1,6-anhydro sugar are discussed. In addition, copolymerization of ABDA (M1) with 1,6-anhydro-2,3,4-tri-O-benzyl-β-D-glucopyranose (LGTBE, M2) was studied. The monomer reactivity ratios calculated by the Kelen-Tüdös method were r1 = 4.46 and r2 = 1.66. Debenzylation of the polymer produced 2-deoxy-(1 → 6)-α-D-arabino-hexopyranan in which every repeating unit contained two free hydroxyl groups.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1984.170220904
