[EN] CHEMOSELECTIVE THIOL-CONJUGATION WITH ALKENE OR ALKYNE-PHOSPHONAMIDATES<br/>[FR] CONJUGAISON CHIMIOSÉLECTIVE D'UN THIOL AVEC DES ALCÈNE- OU ALCYNE-PHOSPHONAMIDATES
申请人:FORSCHUNGSVERBUND BERLIN EV
公开号:WO2018041985A1
公开(公告)日:2018-03-08
Disclosed are novel conjugates and processes for the preparation thereof. A process for the preparation of alkene- or alkyne-phosphonamidates comprises the steps of (I) reacting a compound of formula (III), with an azide of formula (IV), to prepare a compound of formula (V), reacting a compound of formula (V) with a thiol-containing molecule of formula (VI), resulting in a compound of formula (VII).
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.
Provided herein are compounds, compositions and methods for the treatment of Flaviviridae infections, including HCV infections. In certain embodiments, compounds and compositions of nucleoside derivatives are disclosed, which can be administered either alone or in combination with other anti-viral agents.
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。
Application of <i>tert</i>-Butyl Disulfide-Protected Amino Acids for the Fmoc Solid-Phase Synthesis of Lactam Cyclic Peptides under Mild Metal-Free Conditions
作者:Junyou Chen、Tingting Cui、Shuaishuai Sun、Yanyan Guo、Jingnan Chen、Jun Wang、Donald Bierer、Yi-Ming Li
DOI:10.1021/acs.joc.1c00255
日期:2021.7.2
Lactam cyclic peptides are a class of interesting and pharmaceutically active molecules, but their previous syntheses have required the use of heavy metals and/or forcing conditions. Here, we describe the efficient application of the previously reported tert-butyl disulfide-protected aminoacids and their use in the efficient, solid-phase synthesis of a series of lactam cyclic peptides under mild, metal-free