Symmetrical and unsymmetrical α,ω-nucleobase amide-conjugated systems

• Sławomir Boncel,
• Maciej Mączka,
• Krzysztof K. K. Koziol,
• Radosław Motyka and
• Krzysztof Z. Walczak

Beilstein J. Org. Chem. 2010, 6, No. 34, doi:10.3762/bjoc.6.34

• , Department of Materials Science and Metallurgy, Pembroke Street, Cambridge CB2 3QZ, United Kingdom, Tel.: +44 1223 334 356, Fax: +44 1223 334 567 10.3762/bjoc.6.34 Abstract We present the synthesis and selected physicochemical properties of several novel symmetrical and unsymmetrical α,ω-nucleobase mono

• nanofibres. Keywords: amides; antiprotozoal agents; coupling; nucleosides; self-assembly; Introduction There are numerous reports on the synthesis and application of symmetrical and unsymmetrical α,ω-nucleobase amide-conjugated systems (Figure 1) [1][2][3][4][5][6]. These molecules are constructed usually

• ]. Moreover, α,ω-nucleobase amide-conjugated molecules possess the tendency to form meta-stable complexes with DNA and thus can perturb the cell replication. For example, amide-linked heterodimer synthons consisting of acyclic nucleoside units and 5′-amino-2′,5′-dideoxythymidine are PNA/DNA chimeras (V) [4

(Pseudo)amide-linked oligosaccharide mimetics: molecular recognition and supramolecular properties

• José L. Jiménez Blanco,
• Fernando Ortega-Caballero,
• Carmen Ortiz Mellet and
• José M. García Fernández

Beilstein J. Org. Chem. 2010, 6, No. 20, doi:10.3762/bjoc.6.20

• -deazaguanine (c7G), forms a 1:1 complex with pentameric adenyl DNA. Deazaguanine nucleobase was chosen because of the unique glycoside bond stability and its ability to prevent G-quartet formation. To increase the already strong binding of DNG to DNA, DNG was combined with a ligand capable of binding

A hydrogen- bonded channel structure formed by a complex of uracil and melamine

• Reji Thomas and
• G. U. Kulkarni

Beilstein J. Org. Chem. 2007, 3, No. 17, doi:10.1186/1860-5397-3-17

• different, in shape and dimension. This clearly indicates the role of the uracil molecule in directing the shape of the channel structure. In conclusion, we have illustrated the molecular recognition process of melamine with nucleobase uracil. We have also established the presence of channels, in the three

Synthesis of coumarin or ferrocene labeled nucleosides via Staudinger ligation

• Ivana Kosiova,
• Andrea Janicova and
• Pavol Kois

Beilstein J. Org. Chem. 2006, 2, No. 23, doi:10.1186/1860-5397-2-23

• . The structure of products 13a-c was confirmed by 1H NMR analysis. The ratio of product and 4-methyl derivative is probably influenced by diverse effects of nucleobase on the reaction mechanism, especially the interaction of nucleobases with triphenylphosphine residue in the intermediates I(a-c)-IV(a-c

The first salen- type ligands derived from 3',5'-diamino- 3',5'-dideoxythymidine and -dideoxyxylothymidine and their corresponding copper(II) complexes

• Daniel Koth,
• Michael Gottschaldt,
• Helmar Görls and
• Karolin Pohle

Beilstein J. Org. Chem. 2006, 2, No. 17, doi:10.1186/1860-5397-2-17

• containing three (DNA nucleosides) and four (RNA nucleosides) chiral centers respectively. Though the coordination of metal ions to nucleosides is well known, mostly the nucleobase interacts with the metal centre, and the chiral part of the nucleoside is not involved in the coordination. [1][2] Although a

• as the replacement of the thymine base by different functional groups or the immobilization of the complexes by the nucleobase enables the resulting complexes to become promising candidates as catalysts for enantioselective reactions. Conclusion In summary, an effective route for the synthesis of 3