Synthesis of N2-modified 7-methylguanosine 5′-monophosphates as nematode translation inhibitors
作者:Karolina Piecyk、Richard E. Davis、Marzena Jankowska-Anyszka
DOI:10.1016/j.bmc.2012.05.078
日期:2012.8
Preparative scale synthesis of 14 new N-2-modified mononucleotide 5' mRNA cap analogues was achieved. The key step involved use of an SNAr reaction with protected 2-fluoro inosine and various primary and secondary amines. The derivatives were tested in a parasitic nematode, Ascaris suum, cell-free system as translation inhibitors. The most effective compound with IC50 similar to 0.9 mu M was a N-2-p-metoxybenzyl-7-methylguanosine-5'-monophosphate 35. (C) 2012 Elsevier Ltd. All rights reserved.
A Convenient Method for the Preparation of <i>N</i><sup>2</sup>-Ethylguanine Nucleosides and Nucleotides
作者:Magoichi Sako、Hiroyoshi Kawada、Kosaku Hirota
DOI:10.1021/jo990500e
日期:1999.7.1
Interaction of GTP derivatives with cellular and oncogenic ras-p21 proteins
A series of N2-substituted guanosine 5'-triphosphates was synthesized from the corresponding nucleosides. The nucleosides were prepared by treatment of N2-substituted guanines with tetra-O-acetylribose under conditions which maximized the yield of the 9-beta-guanosine isomers. These nucleotides and several sugar- and base-modified analogues of GTP were tested for their ability to bind to cellular and oncogenic forms of the GTP/GDP binding proteins, Ha-ras-p21. Several N2-substituted GTPs showed affinities higher than that of GDP itself, and the N2-[p-(n-butyl)phenyl] derivative bound to the oncogenic mutant, Leu-61 p21, twice as strongly as to the cellular protein. Changes in relative affinities of the nucleotides are discussed with reference to reported crystallographic structures of p21.