Oppenauer-type oxidation of secondary alcohols catalyzed by homogeneous water-soluble complexes
作者:Abdelaziz Nait Ajjou、Jean-Louis Pinet
DOI:10.1139/v05-037
日期:2005.6.1
composed of [Ir(COD)Cl]2, 2,2′-biquinoline-4,4′-dicarboxylic acid dipotassium salt (BQC), and sodium carbonate is highly efficient for the selective oxidation of benzylic, 1-heteroaromatic, aliphatic, and allylic secondary alcohols using catalyst:substrate ratios ranging from 0.4% to 2.5%. Sterically hindered allylic alcohols undergo selectively good conversions to the corresponding enones, while unhindered
由 [Ir(COD)Cl]2、2,2'-二喹啉-4,4'-二羧酸二钾盐 (BQC) 和碳酸钠组成的催化体系可高效地选择性氧化苄基、1-杂芳烃、脂肪族和烯丙基仲醇使用催化剂:底物比率范围从 0.4% 到 2.5%。位阻烯丙醇选择性地良好转化为相应的烯酮,而不受位阻的烯丙醇则完全异构化为饱和酮。汞测试表明催化过程可能是均相的。为这种包括异构化过程在内的Oppenauer 型氧化提出的机理是基于铱醇盐物种。关键词:Oppenauer 氧化,水,催化,异构化,仲醇。