The solid-phase preparation of oligodeoxyribonucleotides attached to intercalator or reactive groups through their 5′-and (or) 3′-ends is reported. These syntheses implicate the introduction of suitable masked functional groups at the 5′-end of the oligonucleotide by the intermediate of their phosphoramidite derivatives or at the 3′-end of the oligonucleotide using modified solid supports. After full deblocking, the functional groups ( ...