Rapid Ligations with Equimolar Reactants in Water with the Potassium Acyltrifluoroborate (KAT) Amide Formation
作者:Hidetoshi Noda、Gábor Erős、Jeffrey W. Bode
DOI:10.1021/ja5018442
日期:2014.4.16
The identification of fast, chemoselective bond-forming reactions is one of the major contemporary challenges in chemistry. We show that chemoselective amide-forming ligations of potassium acyltrifluoroborates (KATs) and O-carbamoylhydroxylamines proceed in the presence of all unprotected functional groups with a second-order rate constant of 20 M(-1) s(-1). PEG chains, lipids, biotin, and dyes were
快速的化学选择性成键反应的鉴定是当代化学中的主要挑战之一。我们表明,在所有未受保护的官能团存在的情况下,酰三氟硼酸钾 (KAT) 和 O-氨基甲酰羟胺的化学选择性酰胺形成连接继续进行,二阶速率常数为 20 M(-1) s(-1)。PEG 链、脂质、生物素和染料被引入到未受保护的 31 聚体肽(GLP-1 类似物)上,反应物的摩尔比为 1 mM,几分钟内,100 μM 在 1 小时内,即使使用 Mw 20,000 PEG。这种偶联反应为合成蛋白质-蛋白质和蛋白质-聚合物偶联物等分子提供了一种新方法。