C-Quaternary alkynyl glycinols via the Ritter reaction of cobalt complexed alkynyl glycols
作者:K. Grammatoglou、J. Bolsakova、A. Jirgensons
DOI:10.1039/c7ra03965d
日期:——
glycinols based on the Ritterreaction of acetonitrile with cobalt complexed alkynyl glycols is presented. The reaction is promoted by acids such as H2SO4 or BF3·Et2O to give oxazolines as the reaction products. These are subjected to cobalt complex cleavage in oxidative conditions and subsequent acidic hydrolysis providing amino alcohols. The substrates for the Ritterreaction can be easily assembled
提出了一种基于乙腈与钴配合的炔二醇的Ritter反应的C-季炔基甘氨酸的新方法。通过酸如H 2 SO 4或BF 3 ·Et 2促进反应O得到恶唑啉作为反应产物。将它们在氧化条件下进行钴配合物裂解,然后进行酸性水解,得到氨基醇。用于Ritter反应的底物可以很容易地组装,以在两个可变位置引入结构多样性。恶唑啉形成的Ritter反应条件与炔烃末端位置上的一系列取代基相容,从而以中等至良好的产率提供恶唑啉。乙二醇反应中心的甲基,羟甲基和甲硅烷氧基甲基取代基具有良好的耐受性,而该位置的苯基不利于反应。