Abstract: The present invention relates to a method for the isolation and/or identification of known or unknown sequences of nucleic acids (target sequences) optionally marked with reporter groups by base specific hybridation with complementary sequences using nucleolipids. The nucleolipids are prepared by lipophilizing nucleosides of formula (Ia) wherein Q represents a group having a substituted tetrahydrofuran ring and Bas represents a group having one or more heterocyclic rings having one or more heterocyclic nitrogen atoms.

Abstract: The present invention relates to a method for the isolation and/or identification of known or unknown sequences of nucleic acids (target sequences) optionally marked with reporter groups by base specific hybridation with, essentially, complementary sequences (in the following referred to as sample oligo-nucleotides, sample sequences or sample nucleic acids), which belong to a library of sequences. Further, the invention relates to nucleolipids used in the method of the invention and a process for the preparation of said nucleolipids. In addition, the invention refers to a pharmaceutical composition comprising said nucleolipids.