Synthesis of C -pyrimidyl nucleosides starting from alkynyl ribofuranosides
作者:Grégory Legrave、Ramzi Ait Youcef、Damien Afonso、Angélique Ferry、Jacques Uziel、Nadège Lubin-Germain
DOI:10.1016/j.carres.2018.04.005
日期:2018.6
The synthesis of four C-pyrimidyl nucleosides is described by condensation of small nitrogen molecules (amidines and ureas) onto alkynyl riboside derivatives. These last compounds were obtained by indium mediated stereoselective alkynylation of suitably protected ribose derivatives and the condensation reaction conditions were studied in order to favor the N-attack of the nitrogen molecules leading
Functionalization of 2<i>H</i>-1,2,3-Triazole <i>C</i>-Nucleoside Template via N<sup>2</sup> Selective Arylation
作者:Alexandra Basilio Lopes、Patrick Wagner、Rodrigo Octavio Mendonça Alves de Souza、Nadège Lubin Germain、Jacques Uziel、Jean-Jacques Bourguignon、Martine Schmitt、Leandro S. M. Miranda
DOI:10.1021/acs.joc.6b00323
日期:2016.6.3
C-Nucleosides are an underexplored and important class of nucleosides with antiviral and anticancer activity. In addition, triazole heterocycles are well employed as a strategy to modify nucleobase in nucleoside analogues, although rare examples were described for triazoyl C-nucleosides. N2-Aryl-1,2,3-triazole C-nucleoside compounds that could be obtained by selective 1,2,3-triazole heterocycle N2
C-核苷是具有抗病毒和抗癌活性的未开发和重要的核苷类。另外,三唑杂环被广泛用作修饰核苷类似物中的核碱基的策略,尽管描述了三唑酰基C-核苷的罕见实例。N 2-芳基-1,2,3-三唑C-核苷化合物,可通过在1-β- d-呋喃核糖基-2 H -1,2,3中进行选择性的1,2,3-三唑杂环N 2芳基化反应获得-三唑底物是在这项研究中设计的。优化条件使用了AdBrettPhos / [PdCl(allyl)] 2作为催化剂体系。这种转变是通过带有电子给体和吸电子基团的芳基卤化物以及杂环卤化物以良好或极好的收率实现的。一旦它允许通过三唑核苷的选择性功能化合成未开发的支架,则在这项研究中开发的转化代表了对核苷领域的重大贡献。
Huisgen Cycloaddition Reaction of <i>C</i>-Alkynyl Ribosides under Micellar Catalysis: Synthesis of Ribavirin Analogues
作者:Ramzi Aït Youcef、Mickaël Dos Santos、Sandrine Roussel、Jean-Pierre Baltaze、Nadège Lubin-Germain、Jacques Uziel
DOI:10.1021/jo900594x
日期:2009.6.5
ribavirin were synthesized from ethyl C-ribosylpropiolate obtained by an alkynylation reaction mediated by indium(0). The C-ribosides were then engaged in a Huisgen 1,3-dipolar cycloaddition reaction under a micellarcatalysis. In these conditions, formation of 1,2,3-triazoles with control of the regioselectivity was observed. The regiochemistry of the adducts was determined by HMBC 2D-NMR analysis.
a drug presenting a broad-spectrum against viral infections. SRO-91 antitumoractivities were investigated on 9 strains of tumor cells and IC50 of the order of 1 μM were obtained on A431 epidermoid carcinoma cells and B16F10 skin melanoma cells. In addition, studies of ovarian tumor cell inhibitions show an interesting activity in regard to the need for new drugs for this pathology. Finally, cytotoxicity
An efficient synthetic pathway leading to two carbonated analogues of ribavirin is described. The key-steps in the synthesis of these ribosyltriazoles bearing a quaternary carbon atom in the 2'-position are an indium-mediated alkynylation and a 1,3-dipolar cyclization.