A general synthetic method for Fmoc-protected monomers of all four diastereomeric aminoethyl peptide nucleic acid (aep PNA) has been developed. The key reaction is the coupling of nucleobase-modified proline derivatives and Fmoc-protected aminoacetaldehyde by reductive alkylation. Oligomerization of the aep PNAs up to 10mer was achieved by Fmoc-solid phase peptide synthesis methodology. Preliminary binding ...