Catalysis of Thiol–Thioester Exchange by Water-Soluble Alkyldiselenols Applied to the Synthesis of Peptide Thioesters and SEA-Mediated Ligation
作者:Marine Cargoët、Vincent Diemer、Benoît Snella、Rémi Desmet、Annick Blanpain、Hervé Drobecq、Vangelis Agouridas、Oleg Melnyk
DOI:10.1021/acs.joc.8b01903
日期:2018.10.19
N-Alkyl bis(2-selanylethyl)amines catalyze the synthesis of peptide thioesters or peptide ligation from bis(2-sulfanylethyl)amido (SEA) peptides. These catalysts are generated in situ by reduction of the corresponding cyclic diselenides by tris(2-carboxyethyl)phosphine. They are particularly efficient at pH 4.0 by accelerating the thiol–thioester exchange processes, which are otherwise rate-limiting
N-烷基双(2-硒基乙基)胺催化双(2-硫烷基乙基)酰胺基(SEA)肽的硫代酸酯的合成或肽的连接。这些催化剂通过用三(2-羧乙基)膦还原相应的环状二硒化物而原位产生。通过加速硫醇-硫酯交换过程,它们在pH 4.0时特别有效,否则在该pH值下会受到速率的限制。通过在弱酸性pH值下促进SEA介导的反应,它们有助于合成复杂的肽,例如很难通过其他途径获得的环状O-酰基异肽。