The reaction of 2,3,6,2',3',4',6'-hepta-O-acetyl-β-lactosyl isothiocyanate (1) with 2-amino-4/6-substituted benzothiazoles 2a-2e gave lactosylthioureas 3a-3e, which were treated with amines in the presence of HgCl2 to afford a series of novel N-alkyl/aryl-N'-(4/6-substituted benzothiazol-2-yl)-N''-perace-tylated lactosylguanidines 4-6.

Synthesis and Biological Activities of Novel Guanidinoglucosides;