A mild and versatile method based on copper-catalyzed [3+2] cycloaddition (Meldal-Sharpless reaction) was developed to tether biomolecules, such as monosaccharides, biotin, cholesterol, or uridine to the N-atom of pyrrole. The required azido and alkyne functions can be placed in either reactant, i.e. in the pyrrole or the biomolecule. The products are interesting precursors for functionalized superparamagnetic polypyrrole core-shell nanoparticles.