Syntheses of spacer-armed carbohydrate components of the Mycobacterium avium serocomplex serovar 8.

p-Nitrophenyl glycosides of 3-O-Me-beta-D-Glcp-(1-->3)-alpha-L-Rhap, alpha-L-Rhap-(1-->2)-6-deoxy-alpha-L-Talp, and 3-O-Me-beta-D-Glcp-(1-->3)-alpha-L-Rhap-(1-->2)-6-deoxy-alpha-L-++ +Talp have been prepared, related to Mycobacterium avium. Various glycosylation methods have been used for the formation of the interglycosidic linkages. The p-nitrophenyl derivatives were converted into p-isothiocyanatophenyl glycosides, capable of forming neoglycoproteins.