peptide synthesis (SPPS). The robustness of the allenone-mediated peptide bond formation was showcased incisively by the synthesis of carfilzomib, which involved a rare racemization-/epimerization-free N to C peptide elongation strategy. Furthermore, the successful synthesis of the model difficult peptide ACP (65–74) on a solid support suggested that this method was compatible with SPPS. This method combines
Allenone 首次被鉴定为一种高效的肽偶联剂。肽键以α-羰基乙烯基酯为关键中间体形成,其形成和随后的氨解以无外消旋/差向异构化的方式自发进行。丙二烯酮偶联试剂不仅对简单酰胺和二肽的合成有效,而且还适用于肽片段缩合和固相肽合成 (SPPS)。卡非佐米的合成充分展示了丙二烯酮介导的肽键形成的稳健性,该合成涉及一种罕见的无消旋化/差向异构化的 N 到 C 肽延伸策略。此外,在固体支持物上成功合成模型困难肽 ACP (65-74) 表明该方法与 SPPS 兼容。该方法结合了传统活性酯和偶联剂的优点,同时克服了两种策略的缺点。因此,这种丙二烯酮介导的肽键形成策略代表了肽合成的颠覆性创新。
Synthesis of [4,5-dehydroLeu2]- and [3,4-dehydropro6]-locust adipokinetic hormone
作者:Paul M. Hardy、Paul W. Sheppard
DOI:10.1039/p19830000723
日期:——
The syntheses of [4,5-dehydroLeu2]- and [3,4-dehydroPro6]-locustadipokinetichormone (LAKH) by the coupling of N-terminal hexapeptides prepared by the solid-phase method with a common C-terminal tetrapeptide synthesised in solution is described. At a dose level of 20 pmol, the former is at least as biologically active as LAKH, but the latter has only ca. 20% of the activity. Difficulties encountered
A Lewis-acid-catalyzed method for the substrate-directed formation of peptide bonds has been developed, and this powerful approach is utilized for the new "remote" activation of carboxyl groups under solvent-free conditions. The presented method has the following advantages: 1) the high-yielding peptidesynthesis uses a tantalum catalyst for any amino acids; 2) the reaction proceeds without any racemization;
Chemoselective peptide bond formation using formyl-substituted nitrophenylthio ester
作者:Akihiro Ishiwata、Tsuyoshi Ichiyanagi、Maki Takatani、Yukishige Ito
DOI:10.1016/s0040-4039(03)00471-4
日期:2003.4
A novel method for peptidebondformation utilizing amino acid 2-formyl-4-nitrophenylthio ester has been developed. The reaction can be performed in water-containing media and is compatible with various types of amino acid side-chain functional groups. Use of N-methylmaleinimide as an additive is essential for the reaction to proceed with high efficiency. It captures liberated formyl-substituted thiophenol