Preparation of 2,4,5-triarylimidazol-4-ols and their stereoselective rearrangement by 1,5-phenyl migration
作者:Gonghao Lu、Akira Katoh、Zhiqiang Zhang、Zhizhi Hu、Peng Lei、Masaru Kimura
DOI:10.1002/jhet.385
日期:——
imidazolones in high yields, instead of amidines with chemiluminescence (CL). The corresponding imidazolols were believed to intermediates and they were successfully obtained by treating the peroxides with DMSO without the base. The diminished CL was because of the reduction of the hydroperoxides with DMSO. The imidazolols subsequently underwent smooth base‐mediated rearrangement to afford imidazolones
在DMSO中,氢过氧化物的Lophine经过碱触发的1,5-苯基迁移,从而以高收率提供了咪唑酮,而不是化学发光(CL)的am。认为相应的咪唑醇是中间体,并且通过用不含碱的DMSO处理过氧化物成功地获得了它们。CL降低是因为用DMSO还原了氢过氧化物。咪唑并随后进行了平滑的碱基介导的重排,得到了咪唑酮。此外,手性咪唑醇以高对映体过量(> 92%)提供了立体选择性咪唑酮,这支持了分子内环的迁移机制。J.杂环化学。(2010)。