Stereocontrolled intermolecular radical additions to methylidenepiperazine-2,5-diones
作者:Christina L. L. Chai、Alison R. King
DOI:10.1039/a900771g
日期:——
The use of latent amino acid functionalities for the syntheses of methylidenepiperazine-2,5-diones is reported. These piperazinediones are potential chiral templates in the synthesis of functionalised piperazinediones and amino acids. Carbon–carbon bond formation utilising radical addition reactions between the methylidenepiperazinediones and a number of alkyl radicals resulted in good yields of the addition adduct. Moderate to high diastereoselectivities were observed and factors controlling the chiral induction are discussed here.
报道了利用潜在的氨基酸功能团合成亚甲基哌嗪-2,5-二酮的方法。这些哌嗪二酮是合成功能化哌嗪二酮和氨基酸的潜在手性模板。通过亚甲基哌嗪二酮与一系列烷基自由基之间的自由基加成反应形成碳-碳键,获得了良好的收率。观察到了中等至高的非对映选择性,并在此讨论了控制手性诱导的因素。