A recyclable chiral auxiliary for the asymmetric syntheses of α-aminonitriles and α-aminophosphinic derivatives
作者:Jean-Christophe Rossi、Marc Marull、Nicolas Larcher、Jacques Taillades、Robert Pascal、Arie van der Lee、Phillipe Gerbier
DOI:10.1016/j.tetasy.2008.03.013
日期:2008.4
involving the following sequence: (i) stereoselective Strecker condensation of a chiral ketone with HCN and NH3 followed by (ii) condensation with RCHO, an HCN donor or a phosphinate and (iii) regioselective decomposition of the intermediate to release the target compound. The third step enables the easy regeneration of the initial chiral ketonic auxiliary.
光学活性α氨基腈和α-aminophosphinic衍生物以高产率和高ee值使用通过扩展我们的先前开发的方法涉及以下序列的简单的路线制备:(ⅰ)立体选择性的Strecker与HCN和NH手性酮的缩合3随后通过(ii)与RCHO,HCN供体或次膦酸酯缩合和(iii)中间体的区域选择性分解以释放目标化合物。第三步使最初的手性酮助剂容易再生。