An unprecedented highly efficient solvent-free oxidation of alkynes to α,β-acetylenic ketones with tert-butyl hydroperoxide catalyzed by water-soluble copper complex
作者:Abdelaziz Nait Ajjou、Gabriel Ferguson
DOI:10.1016/j.tetlet.2006.03.140
日期:2006.5
catalytic system composed of CuCl2 and 2,2′-biquinoline-4,4′-dicarboxylic acid dipotassium salt (BQC) was found to be highly efficient for the selective α-oxidation of internal alkynes to the corresponding α,β-acetylenic ketones, with aqueous tert-butyl hydroperoxide under mild conditions. For the first time, full conversions of alkynes were reached with excellent selectivities, and propargylic tert-butylperoxy
发现由CuCl 2和2,2'-联喹啉-4,4'-二羧酸二钾盐(BQC)组成的催化体系对于内部炔烃选择性α-氧化为相应的α,β-炔烃非常有效酮,在温和条件下与叔丁基过氧化氢水溶液混合。首次以极好的选择性达到炔烃的完全转化,并观察到炔丙基叔丁基过氧醚,并建议将其作为反应中间体。在末端炔烃的情况下,氧化反应缓慢,并且收率低,范围为32%至40%。