Efficient Synthesis of Unsymmetrical Ureido‐Linked Disaccharides

Abstract

Abstract Five nonsymmetrical urea‐linked disaccharides, in which two glycopyranoside units are bound at the 1⇄2, 1⇄4, and 1⇄6 positions, were efficiently synthesized. A mild and safe procedure, in which glycosyl isocyanates were coupled with a glycosylamine, was employed. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)