Synthesis of fluorescent 5-heteroarylpyrimidine-containing oligonucleotides via post-synthetic trifluoromethyl conversion
作者:Yuta Ito、Hisato Tanaka、Ayana Murakami、Yasufumi Fuchi、Yoshiyuki Hari
DOI:10.1039/d4ob00402g
日期:——
base in DNA oligonucleotides was achieved. Specifically, the oligonucleotides containing 5-trifluoromethylpyrimidine bases were treated with o-phenylenediamines and o-aminothiophenols as nucleophiles to afford the corresponding 5-(benzimidazol-2-yl)- and 5-(benzothiazol-2-yl)-pyrimidine-modified bases. Furthermore, evaluation of the fluorescence properties of the obtained oligonucleotides revealed that
Synthesis and in vitro antileishmanial activity of 5-substituted-2′-deoxyuridine derivatives
作者:Corinne Peyron、Rachid Benhida、Christian Bories、Philippe M. Loiseau
DOI:10.1016/j.bioorg.2005.07.001
日期:2005.12
We report herein the synthesis and the in vitro antileishmanial evaluation of 5-substituted-2'-deoxyuridine nucleosides. The most active compound against Leishmania donovani promastigotes was Thia-dU (3a) with an IC50 = 3 mu M. This compound exhibited the same activity as zidovudine (3'-azido-2'-deoxythymidine) used as nucleoside reference compound. Considering the cytotoxicity of synthetic compounds on peritoneal murine macrophages., the most toxic compound was MeThio-dU (3d) with a MTC at 10 mu M. Only Methia-dU (3b) was active against intramacrophagic amastigotes with an IC50 = 6.5 mu M. This latter can now be evaluated in vivo, for further investigations through structure-based drug design. (c) 2005 Elsevier Inc. All rights reserved.