Water-Soluble Phosphinothiols for Traceless Staudinger Ligation and Integration with Expressed Protein Ligation
作者:Annie Tam、Matthew B. Soellner、Ronald T. Raines
DOI:10.1021/ja073204p
日期:2007.9.1
The traceless Staudinger ligation is an effective means to synthesize an amide bond between two groups of otherwise orthogonal reactivity: a phosphinothioester and an azide. An important application of the Staudinger ligation is in the ligation of peptides at a variety of residues. Here, we demonstrate that the traceless Staudinger ligation can be achieved in water with a water-soluble reagent. Those
无痕 Staudinger 连接是在两个具有其他正交反应性的基团之间合成酰胺键的有效手段:硫代膦基酯和叠氮化物。Staudinger 连接的一个重要应用是连接各种残基的肽。在这里,我们证明可以使用水溶性试剂在水中实现无痕施陶丁格结扎。那些提供高产率酰胺产物的试剂会阻止关键亚氨基正膦中间体中氮的质子化。最有效的试剂,双(对二甲氨基乙基)膦甲硫醇,介导水中等摩尔底物的快速连接。该试剂还能够与内含肽介导的蛋白质剪接过程中形成的硫酯中间体进行硫酯转移反应。因此,