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1.
Nucleosides Nucleotides Nucleic Acids ; 20(10-11): 1831-41, 2001.
Artigo em Inglês | MEDLINE | ID: mdl-11719996

RESUMO

Reductive amination of 3',5'-O-(tetraisopropyldisilyloxane-1,3-diyl)-2'-deoxy-5-formyluridine with several aliphatic and aromatic amines, in various solvents, is described. In the case of aliphatic amines, the expected C-5 substituted methylamino pyrimidine nucleosides are formed along with by-products deriving from opening of the pyrimidine ring. Relative amounts of the by-products depend upon the polarity of the solvent employed.


Assuntos
Aminas/química , Desoxiuridina/análogos & derivados , Desoxiuridina/síntese química , Nucleosídeos/síntese química , Espectroscopia de Ressonância Magnética , Modelos Químicos
3.
Bioorg Med Chem Lett ; 10(17): 2005-9, 2000 Sep 04.
Artigo em Inglês | MEDLINE | ID: mdl-10987437

RESUMO

2'-Deoxy-8-(propyn-1-yl)adenosine has been incorporated in synthetic oligodeoxyribonucleotides and its influence on thermal stability of duplex and quadruplex structures investigated by UV, CD and 1H NMR. The obtained results seem to indicate that the presence of the modified base negatively affects the stability of double stranded DNA whereas remarkably increases the stability of parallel quadruplex structures.


Assuntos
DNA/química , Oligodesoxirribonucleotídeos/química , Adenosina , Dicroísmo Circular , Espectroscopia de Ressonância Magnética , Conformação de Ácido Nucleico
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