Synthesis of bis-α-amino acids through proline catalyzed asymmetric α-amination of higher homologs of Garner's aldehyde
作者:Ramu Petakamsetty、Ram Pada Das、Ramesh Ramapanicker
DOI:10.1016/j.tet.2014.10.048
日期:2014.12
A very convenient synthesis of bis-α-amino acids from the higher homologs of Garner's aldehyde is reported. The key step is proline catalyzed asymmetric amination of the aldehydes using dibenzylazodicarboxylate. The aldehydes used are either commercially available or can easily be prepared from aspartic or glutamic acid. One of the two chiral centers in the bis-amino acids comes from the aldehyde and
据报道,由加纳醛的较高同系物非常方便地合成双-α-氨基酸。关键步骤是使用二苄基偶氮二羧酸酯脯氨酸催化醛的不对称胺化。所用的醛可以商购获得,或者可以容易地由天冬氨酸或谷氨酸制备。双氨基酸中的两个手性中心之一来自醛,另一个通过脯氨酸催化反应生成,它们的收率很高,且非对映选择性很高(93-99%)。报告的路线提供了合成具有所需立体化学结果的标题化合物的一般方法。