Functionalised polycaprolactones have been obtained by anionic coordinated ring-opening polymerisation with Al(OiPr)(3) as the initiator in the presence of monosaccharides as transfer agents. H-1 and C-13 NMR spectroscopy, as well as MALSI-TOF mass spectrometry clearly show the functionalisation of the polycaprolactone chains. Protected monosaccharides bearing primary hydroxyl groups are suited best to get well-controlled polymer chains. Polycaprolactones functionalised with galactopyranose end groups have been used for the preparation of nanoparticles according to the emulsification-diffusion procedure. Nanospheres and nanocapsules with diameters around 0.50 mum could be obtained.