作者:Thomas Baumann、Henning Vogt、Stefan Bräse
DOI:10.1002/ejoc.200600654
日期:2007.1
An efficient access to configurationally stable α,α-disubstituted α-amino aldehydes, oxazolidinones, and α-amino acids has been presented. Starting from simple and easily available racemic aldehydes, the α-aminated products were obtained using azodicarboxylates as the nitrogen source in up to 86 % ee and moderate to excellent yield. These products could further be converted both into the corresponding
已经提出了一种有效获取构型稳定的 α,α-二取代 α-氨基醛、恶唑烷酮和 α-氨基酸的方法。从简单易得的外消旋醛开始,使用偶氮二羧酸盐作为氮源以高达 86% ee 和中等至极好的收率获得 α-胺化产物。这些产物可以进一步转化为相应的 α-氨基醇,并且取决于偶氮二羧酸酯的残留物和反应条件,转化为恶唑烷酮。另一方面,在温和条件下向羧酸的氧化和酰肼键的断裂揭示了游离的 α-烷基化苯基甘氨酸衍生物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)