Disulfide bond formation in S-Acetamidomethyl cysteine-containing peptides by the combination of silver trifluoromethanesulfonate and dimethylsulfoxide / aqueous HCl
quantitatively to cystine by deprotection of the Acm group with silver trifluoromethanesulfonate (AgOTf) followed by dimethylsulfoxide (DMSO) / aqueous hydrochloric acid (HCl) treatment. No significant side reactions were observed with oxidation-sensitive amino acids such as Met, Tyr, and Trp under these reaction conditions. This method has been applied successfully to the syntheses of oxytocin and a
The Use of Hydrogen Peroxide for Closing Disulfide Bridges in Peptides
作者:M. V. Sidorova、A. S. Molokoedov、A. A. Az'muko、E. V. Kudryavtseva、E. Krause、M. V. Ovchinnikov、Zh. D. Bespalova
DOI:10.1023/b:rubi.0000023093.05123.31
日期:2004.3
The use of hydrogen peroxide for the formation of disulfide bridges was studied in 15 peptides of various lengths and structures. The oxidation of peptide thiols by hydrogen peroxide was shown to proceed under mild conditions without noticeable side reactions of Trp, Tyr, and Met residues. Yields of the corresponding cyclic disulfides were high and mostly exceeded those obtained with other oxidative
在15种不同长度和结构的肽中研究了过氧化氢在二硫键形成中的应用。显示过氧化氢对肽硫醇的氧化在温和的条件下进行,没有明显的Trp,Tyr和Met残留副反应。相应的环状二硫化物的收率很高,并且大大超过了其他氧化剂(尤其是碘)的收率。已经确定,当大规模合成催产素和奥曲肽(最多10克)时,在有机介质中使用过氧化氢也能提供足够高的收率。该论文的英文版:Russian Journal of Bioorganic Chemistry,2004年,第1卷。30号 2; 另请参见http://www.maik.ru。
2,2′-Dithiobis(5-nitropyridine) (DTNP) as an effective and gentle deprotectant for common cysteine protecting groups
作者:Alayne L. Schroll、Robert J. Hondal、Stevenson Flemer
DOI:10.1002/psc.1403
日期:2012.1
in a TFA solvent system show a remarkable ability to deprotect some cysteine blocking functionality traditionally removable only by more harsh or forcing conditions. Beyond illustrating the deprotective ability of this reagent cocktail within a cysteine‐containing peptide sequence, the utility of this method was further demonstrated through iterative disulfide formation in oxytocin and apamin test peptides
在用于固相肽合成的所有市售氨基酸衍生物中,没有一种比半胱氨酸具有更丰富的侧链保护多样性。半胱氨酸硫醇的高反应性使其在肽构建过程中需要衰减。此外,肽或蛋白质序列中的半胱氨酸残基倾向于形成二硫键连接,这使肽化学家有机会通过在肽段内的半胱氨酸 S 保护的正交对的明智放置来迭代地安装这些二硫键,作为合成后的操作。建筑学。为这些不同的阻断方案不断发现新的去保护载体是很重要的,以便在一个物种的去除与另一种物种的去除之间实现最高程度的正交性。我们在此报告了对 2,2'-二硫代双(5-硝基吡啶)(DTNP)在一系列市售 Cys S 保护基团上的脱保护潜力的范围和局限性的完整调查。DTNP 在 TFA 溶剂系统中的温和条件显示出非凡的能力,可以对某些传统上只能通过更苛刻或强制条件去除的半胱氨酸封闭功能进行去保护。除了说明该试剂混合物在含半胱氨酸的肽序列中的去保护能力之外,该方法的实用性还通过在催产素和阿巴胺
N-Halosuccinimides mediated deprotection of cysteine-S protecting groups for one-pot regioselective synthesis of disulfide bonds in peptides under mild aqueous conditions
作者:Yueyue Xing、Yafang Wang、Dongying Ma、Shigang Shen、Changying Song、Nan Zhang、Tianyu Bo、Tiesheng Shi、Shuying Huo
DOI:10.1016/j.tetlet.2023.154459
日期:2023.3
deprotect these protectinggroups to directly form an intramolecular disulfide bond in peptide. In addition, all the deprotection reactions were complete within 10 min, conferring fast reaction rates. Moreover, formation of a hydrolytic stable halosulfonium cation was revealed to play a critical role in these deprotection reactions. When NCS and NBS were employed for deprotecting these groups, two disulfide