Solid-Phase Synthesis of New S-Glycoamino Acid Building Blocks
摘要:
[GRAPHICS]Efficient synthesis of unprotected S-glycoamino acid building blocks in the solid phase by coupling a sugar 1-thiolate with iodine activated fluoren-9-ylmethoxycarbonyl (Fmoc) protected amino acids.
[EN] MULTICYCLIC PEPTIDES AND METHODS FOR THEIR PREPARATION<br/>[FR] PEPTIDES MULTICYCLIQUES ET LEURS PROCÉDÉS DE PRÉPARATION
申请人:STICHTING TECHNISCHE WETENSCHAPPEN
公开号:WO2018106112A1
公开(公告)日:2018-06-14
The invention relates to methods for preparing a compound comprising a peptide attached to a molecular scaffold whereby multiple peptide loops are formed, to compounds that can be obtained with such methods and uses thereof.
A new strategy was developed for the synthesis of peptide disulfide-bond mimics using fully orthogonally protected diaminodiacids. This method overcomes the previous problems of heavy-metal contamination and poor compatibility with Fmoc chemistry and provides a practical avenue for the efficient preparation of peptide disulfide-bond mimics.
reaction for the direct trifluoromethylthiolation and fluorination of alkyl alcoholsusing AgSCF3 and nBu4NI has been developed. The trifluoromethylthiolated compounds and alkyl fluorides were selectively formed by changing the ratio of AgSCF3/nBu4NI. This protocol is tolerant of different functional groups and might be applicable to late‐stage trifluoromethylthiolation of alcohols.
Chemical synthesis of disulfide surrogate peptides by using beta-carbon dimethyl modified diaminodiacids
作者:Ji-Bin Cui、Xiao-Xiong Wei、Rui Zhao、Huixia Zhu、Jing Shi、Donald Bierer、Yi-Ming Li
DOI:10.1039/d1ob01715b
日期:——
incorporating Cys Cβ dimethyl modification, obtained by penicillamine (Pen)-based thiol alkylation. The utility of these new diaminodiacids was demonstrated by the synthesis of disulfide surrogates of oxytocin containing a short-span disulfide bond and of KIIIA with large-span disulfide bonds. This new type of synthetic bridge further extends the diaminodiacid toolbox to facilitate the study of the structure–activity
用代谢稳定的等排体替代二硫键是提高富含二硫键的多肽对还原剂和异构酶的稳定性的有前景的策略。基于二氨基二酸的策略是构建二硫键模拟物的最有效方法之一,但迄今为止尚未开发出修饰的二氨基二酸。受二硫键的烷基化可以调节多肽活性这一事实的启发,我们在此报告了第一个结合 Cys C β的硫醚桥联二氨基二酸的例子二甲基改性,通过基于青霉胺(Pen)的硫醇烷基化获得。这些新的二氨基二酸的效用通过合成含有短跨度二硫键的催产素的二硫键替代物和具有大跨度二硫键的 KIIIA 来证明。这种新型合成桥进一步扩展了二氨基二酸工具箱,以促进对富含二硫键的肽的构效关系的研究。
Diaminodiacid-Based Solid-Phase Synthesis of Peptide Disulfide Bond Mimics
作者:Hong-Kui Cui、Ye Guo、Yao He、Feng-Liang Wang、Hao-Nan Chang、Yu-Jia Wang、Fang-Ming Wu、Chang-Lin Tian、Lei Liu
DOI:10.1002/anie.201302197
日期:2013.9.2
The antimicrobial peptide tachyplesin I was used as a model to apply the title strategy, which was developed for the preparation of peptidic macrocycles with double disulfide surrogates. The folding and activity of the tachyplesin I analogues were found to be sensitive to the structure of the disulfide surrogates, thus underlining the necessity of a flexible synthetic route for generating disulfide