作者:Annie Tam、Ronald T. Raines
DOI:10.1016/j.bmc.2008.02.047
日期:2009.2
The traceless Staudinger ligation can be mediated by phosphinothiols under physiological conditions. Proximal positive charges are necessary to achieve that transformation, presumably because those charges discourage protonation of the key iminophosphorane intermediate. Here, a series of cationic phosphinothiols is used to probe Coulombic effects on the traceless Staudinger ligation in aqueous buffers
无痕施陶丁格结扎可以在生理条件下由膦硫醇介导。近端正电荷是实现这种转化所必需的,大概是因为这些电荷会阻碍关键亚氨基膦中间体的质子化。在这里,一系列阳离子膦硫醇用于探测水性缓冲液中无痕施陶丁格结扎的库仑效应。试剂双(米- Ñ,Ñ -dimethylaminomethylphenyl)phosphinomethanethiol(3)被发现是优于其他,无论在它的介导无痕施陶丁格连接在水和其合成的效率的能力。