Cyclative Release Strategy to Obtain Pure Cyclic Peptides Directly from the Solid Phase
作者:Sevan Habeshian、Ganesh A. Sable、Mischa Schüttel、Manuel L. Merz、Christian Heinis
DOI:10.1021/acschembio.1c00843
日期:2022.1.21
with an N-terminal thiol group are synthesized on the solid phase via a C-terminal disulfide linker, their sidechain-protecting groups are removed while the peptides remain on the solid phase, and the peptides are finally released via a cyclative mechanism by the addition of a base that deprotonates the N-terminal thiol group and triggers an intramolecular disulfide-exchange reaction. The method yields
大量环肽的合成——例如,在药物开发筛选中所需的——目前受到单个肽的色谱纯化需要的限制。在这里,我们开发了一种策略,其中环肽以纯形式从固相中释放出来,不需要纯化。具有 N 端硫醇基的肽通过 C 端二硫键在固相上合成,其侧链保护基团被去除,而肽保留在固相上,最终通过环化机制释放肽。添加使 N 端硫醇基团去质子化并引发分子内二硫键交换反应的碱基。该方法产生二硫键环化肽,许多重要的肽药物如催产素、加压素、和奥曲肽为基础。我们证明该方法适用于 96 孔板中的简便合成,并允许合成和筛选数百种环肽。
Beta-amino acid compounds as integrin antagonists
申请人:——
公开号:US20040029883A1
公开(公告)日:2004-02-12
The present invention relates to compounds of general formula (I), wherein the residues R represent organic radicals, X represents a bond, oxygen or —NR12 and Y represents oxygen or sulfur, processes for their preparation, pharmaceutical compositions containing them as well as their use for the production of pharmaceutical compositions for the treatment of inflammatory, autoimmune and immune diseases.
本发明涉及通式(I)化合物(其中残基 R 代表有机基,X 代表键、氧或-NR12,Y 代表氧或硫)、其制备工艺、含有它们的药物组合物以及它们在生产治疗炎症、自身免疫和免疫疾病的药物组合物中的用途。
Constrained β-alanine based GpIIb/IIIa antagonists
作者:Scott I Klein、Mark Czekaj、Bruce F Molino、Valeria Chu
DOI:10.1016/s0960-894x(97)00311-9
日期:1997.7
The concepts of centrally constrained and peptide based fibrinogen receptor antagonists have been successfully combined into a single series of analogs which have been demonstrated to be potent inhibitors of platelet aggregation. (C) 1997 Elsevier Science Ltd.
Catalysis with Phosphine-Containing Amino Acids in Various “Turn” Motifs
作者:Anton Agarkov、Scott J. Greenfield、Takahiro Ohishi、Scott E. Collibee、Scott R. Gilbertson
DOI:10.1021/jo049103g
日期:2004.11.1
We have been actively involved in the development of parallel approaches for the discovery of phosphine ligands. Our approach has been based on the incorporation of phosphine-containing amino acids into peptide sequences that are designed to have stable secondary structures. We have examined helical and turn secondary structures and have reported that alkylation of cyclopentenyl acetate with dimethylmalonate can be catalyzed in high enantiomeric excess (ee) with a beta-turn-based ligand. The importance of the peptide secondary structure was demonstrated through the synthesis of a series of peptide ligands where the nature of the turn-forming residues was probed. Additionally, other turn-forming units and a variety of different phosphine-containing amino acids have been examined for their ability to control the selectivity of the allylation reaction. This paper reports the results obtained through the examination of different turn motifs as well as different phosphine substitutions on the "best" turn sequence, Pps-Pro-D-Xxx-Pps.