title: Synthesis and characterization of new chiral peptide nucleic acid (PNA) monomers.
abstract: PNAs are DNA analogues in which the nucleic acid's backbone is replaced by a chiral or achiral pseudopeptide backbone and nucleobases are attached to the backbone by methylene carbonyl linkers. The easy to modify PNA structure gives the possibility to obtain monomers, and subsequently oligomers, with improved properties. We have synthesised several new PNA monomers, starting from a series of 2'-substituted methyl N-(2-Boc-aminoethyl)glycinates. The pseudodipeptides were obtained using modified Kosynkina's method, based on the reductive amination of N-Boc-protected alpha-amino aldehydes [glycinal, isoleucinal, valinal, tryptophanal, serinal(Bzl), prolinal] with methyl glycinate. The compounds were then acylated with nucleic acid base derivatives by simplified procedure, and the purification was limited to the last step of the synthesis. The applied procedure is useful in synthesis of various chiral PNA monomers.
authors.affiliation: Faculty of Chemistry, University of Gdansk, Poland.
authors.forename: B
authors.initials: B
authors.lastname: Falkiewicz
authors.forename: W
authors.initials: W
authors.lastname: Wisniowski
authors.forename: A S
authors.initials: AS
authors.lastname: Kolodziejczyk
authors.forename: K
authors.initials: K
authors.lastname: Wisniewski
authors.forename: L
authors.initials: L
authors.lastname: Lankiewicz
mesh_terms: D000447:Aldehydes; D000596:Amino Acids; D015195:Drug Design; D007202:Indicators and Reagents; D020135:Peptide Nucleic Acids / Q000138:chemical synthesis* / Q000737:chemistry; D013237:Stereoisomerism
chemical_list: D000447:Aldehydes; D000596:Amino Acids; D007202:Indicators and Reagents; D020135:Peptide Nucleic Acids