From Propargylic Amides to Functionalized Oxazoles: Domino Gold Catalysis/Oxidation by Dioxygen
作者:A. Stephen K. Hashmi、Maria Camila Blanco Jaimes、Andreas M. Schuster、Frank Rominger
DOI:10.1021/jo301288w
日期:2012.8.3
5-disubstituted oxazoles from propargylic amides is reported. A series of propargylic amides were transformed to the corresponding alkylideneoxazolines by a gold(I) catalyst. The next step was an autoxidation to hydroperoxides bearing the heteroaromatic oxazoles. Experiments addressing the reaction mechanism reveal a radical pathway for this autoxidation process. The hydroperoxides could conveniently be converted
据报道,从炔丙基酰胺中获得了一系列功能化的2,5-二取代的恶唑的新型,高效且经济的方法。通过金(I)催化剂将一系列炔丙基酰胺转化为相应的亚烷基neoxazolines。下一步是自氧化为带有杂芳族恶唑的氢过氧化物。针对反应机理的实验揭示了该自氧化过程的自由基途径。通过用硼氢化钠还原,氢过氧化物可以方便地转化为相应的醇。