Single-Step Synthesis of Iodinated Oxazoles from <i>N</i>-Propargyl Amides Mediated by I<sub>2</sub>/Iodosylbenzene/Trimethylsilyl Trifluoromethanesulfonate Systems
作者:Sho Suzuki、Akio Saito
DOI:10.1021/acs.joc.7b01563
日期:2017.11.17
trifluoromethanesulfonate (TMSOTf) is effective for single-step synthesis of iodinated oxazoles from N-propargyl amides via the aromatization of the iodocyclized intermediates, which has difficulty proceeding through conventional iodocyclization methods. Compared to the former method consisting of the metal-catalyzed cyclization of N-propargyl amides followed by halogenation of alkylideneoxazolines, the present
I 2,碘基苯和三甲基甲硅烷基三氟甲磺酸盐(TMSOTf)的组合可有效地通过碘化环化中间体的芳构化从N-炔丙基酰胺一步合成碘代恶唑。与由N-炔丙基酰胺的金属催化环化然后亚烷基亚恶唑啉卤化的前一种方法相比,本反应提供了一种简便且无金属的方法。