Abstract Condensation of tetra-O-acetyl-α- D -glucopyranosyl bromide with 1,3,4,6-tetra-O-acetyl-α- D -glucopyranose in acetonitrile solution containing mercuriccyanide and mercuric bromide affords the octa-acetates of both kojibiose (2-O-α- D -glucopyranosyl- D -glucose) and sophorose (2-O-β- D -glucopyranosyl- D -glucose). Each of these products can be isolated in approximately 28% yield. Although