SEARCH

SEARCH BY CITATION

Abstract

The readily accessible 1,4:3,6-dianhydroalditols with D-gluco- (1), L-ido- (5) and D-mannoconfigurations (6) were efficiently transformed into the 2,5-diamino-1,4:3,6-dianhydro-2,5-dideoxyalditols with D-gluco- (10), D-manno- (13), and L-ido-configuration (16). Interfacial polycondensation of these chiral heterocyclic diamines as well as ethylene- and tetramethylene diamine with the bis(chloroformate) 3 derived from 1,4:3,6-dianhydro-D-sorbitol gave the polyurethanes 17 to 21. Their number-average molecular weights were determined to be M̄n ≈ 3000 corresponding to an average degree of polymerisation P̄n ≈ 20. Inherent viscosities were measured, and 1H NMR spectroscopy as well as DSC gave informations about the molecular structure and some polymer properties.