The C-disaccharide analogue of the sequence beta-D-Galf-(1-->3)-beta-D-Glcp
, an internal disaccharide of the capsular polysaccharide of Klebsiella K14
was synthesized by radical macrocyclization of temporarily tethered monosa
ccharides. The alpha-difluoro-C-analogue was obtained in three steps from D
-galactono-1,4-lactone.