当前用于构建酰胺键的方法通过脱水偶联过程将胺和羧酸连接起来,该过程通常需要有机溶剂、昂贵且通常危险的偶联试剂,并掩盖其他官能团。在这里,我们描述了使用伯胺和酰基三氟硼酸钾的酰胺形成,由在水中快速进行的简单氯化剂促进。该反应在酸性 pH 值下很快,并且可以耐受底物中的醇、羧酸,甚至仲胺。它适用于伯酰胺、磺酰胺和其他通常抵抗经典酰化的 N 官能团的官能化,并可应用于后期官能化。
A Reagent for the One-Step Preparation of Potassium Acyltrifluoroborates (KATs) from Aryl- and Heteroarylhalides
作者:Gábor Erős、Yo Kushida、Jeffrey W. Bode
DOI:10.1002/anie.201403931
日期:2014.7.14
design and synthesis of a new reagent for their one‐step preparation from aryl‐ and heteroarylhalides. The reagent is a stable, soluble zwitterion prepared by S‐alkylation of a novel thioformamide trifluoroboronate. The KATs are prepared by adding one equivalent of nBuLi to a mixture of the aryl halide and the reagent at −78 °C. This protocol is suitable for the preparation of KATs containing pyridines