Gold Catalysis: Products and Intermediates Obtained from N-Propargylcarboxamides Bearing Additional Substituents on Nitrogen
作者:A. Stephen K. Hashmi、Lise Molinari、Frank Rominger、Thomas Oeser
DOI:10.1002/ejoc.201100179
日期:2011.4
substrates with additional substituents on the nitrogen atom was investigated. Under aqueous conditions acyloxy-substituted allylammonium salts could selectively be obtained. Monitoring of the reactions by 1 H NMR spectroscopy indicated the presence of an intermediate. Then switching to anhydrous reaction conditions allowed the isolation and characterization of these intermediates, oxazoliniminium species
研究了几种炔丙酰胺底物与氮原子上的额外取代基的反应。在水性条件下,可以选择性地获得酰氧基取代的烯丙基铵盐。通过 1 H NMR 光谱监测反应表明存在中间体。然后切换到无水反应条件允许分离和表征这些中间体,恶唑啉鎓物种。在碱性条件下处理烯丙基铵盐导致酰基从氧原子转移到氮原子,这证明这些产物不是仅通过金催化的三键直接水合形成的,同时很好地解释了两个三键中只有一个的选择性一水合。