Novel amino acids: synthesis of furoxan and sydnonimine containing amino acids and peptides as potential nitric oxide releasing motifs
作者:Andrew Nortcliffe、Nigel P. Botting、David O'Hagan
DOI:10.1039/c3ob41047a
日期:——
The incorporation of furoxan and sydnonimine ring systems into amino acid side chains is demonstrated with the preparation of four novel amino acids which carry these nitric oxide-releasing motifs. N-((4-Nitrophenoxy)carbonyl)-3-phenylsydnonimine 9 and bis(phenylsulfonyl)furoxan 10 are the key intermediates for introducing the heterocycle side chains onto appropriate amine and alcohol functionalities respectively. Furoxan 5 and 7 both displayed NO release based on determination of nitrite production. Orthogonal amino acid protecting group strategies were deployed to demonstrate that the amino acids could be incorporated into peptide frameworks. By way of demonstration the amino acids were placed centrally into several tripeptide motifs. Griess test assays showed that these amino acids released NO in the presence of γ-glutathione (GST).
将呋喃噁唑和吡啶亚胺环系统引入氨基酸侧链的工作通过制备四种具有这些释放一氧化氮结构的新型氨基酸得到了证明。N-((4-硝基苯氧)羧基)-3-苯基吡啶亚胺9和双(苯基磺酰)呋喃噁唑10是将杂环侧链引入适当的胺和醇功能的关键中间体。呋喃噁唑5和7均显示出基于亚硝酸盐生成的NO释放。采用正交氨基酸保护基团策略,证明这些氨基酸可以被嵌入肽框架中。作为示例,这些氨基酸被置于几个三肽结构的中心。Griess试验显示,这些氨基酸在存在γ-谷胱甘肽(GST)时释放NO。