Improvement of stability of phenacyloxycarbamidomethyl (Pocam) group, a cysteine protecting group removable with zinc reduction, under acidic conditions
作者:Hidekazu Katayama、Takuma Goto
DOI:10.1016/j.tetlet.2016.12.081
日期:2017.2
In order to improve the stability of phenacyloxycarbamidomethyl (Pocam) group, a cysteine protecting group removable with zinc reduction, under acidic conditions, various alkyl substituents on the nitrogen atom of Pocam group were examined. As a result, attachment of an electron-withdrawing group improved the stability, and 2,2,2-trifluoroethyl (Tfe) group was most effective among four substituents
为了提高可通过锌还原除去的半胱氨酸保护基苯氧基氧基氨基甲酰甲基(Pocam)基团的稳定性,在酸性条件下,研究了Pocam基团的氮原子上的各种烷基取代基。结果,吸电子基团的连接改善了稳定性,并且在测试的四个取代基中2,2,2-三氟乙基(Tfe)基团最有效。Tfe-Pocam组可用于固相肽合成和肽缩合反应,也可用于区域选择性二硫键形成反应。