A general method for the facile synthesis of optically active 2-substituted piperazines via functionalized 2,5-diketopiperazines
作者:Kate S. Ashton、Mitchell Denti、Mark H. Norman、David J. St. Jean
DOI:10.1016/j.tetlet.2014.06.058
日期:2014.8
Upon utilization of some common methods described in the literature for the synthesis of chiral, 2-substituted 2,5-diketopiperazines, extensive racemization was observed. Further investigation showed that heating in the presence of a mild base racemized the chiral center in the product diketopiperazines. A generalized, readily scalable route was sought and, after investigating the effect of base and
Diketopiperazines bearing a benzyl moiety with different para-substituents were synthesized and analyzed by 1H NMR spectroscopy. All of these diketopiperazines were found to adopt a folded conforma...
合成带有苄基部分和不同对位取代基的二酮哌嗪并通过 1 H NMR 光谱分析。发现所有这些二酮哌嗪都采用折叠的构形...