Aggregates obtained from saccharide-containing dendrons were immobilized by in situ cross-link with 1,3-phenylene diisocyanate. Characterizations of the resultant oligomers by dynamic light scattering and MALDI-TOF Mass have established that the higher generation dendrons which tend to aggregate into a spherical structure result in a dendritic polymer whereas the lower generation dendrons which tend to aggregate into a disordered large particle cannot result in such a dendrimer-shaped oligomer.