Highly enantioselective organocatalytic cascade reaction for the synthesis of piperidines and oxazolidines
作者:Sylva Číhalová、Guillem Valero、Jiří Schimer、Marek Humpl、Martin Dračínský、Albert Moyano、Ramon Rios、Jan Vesely
DOI:10.1016/j.tet.2011.08.079
日期:2011.11
The synthesis of piperidines and piperidines derivatives in enantiopure fashion has been a challenging goal for organic chemists. In this report we developed a nice cascade reaction for piperidine derivatives based in an amidomalonate Michael addition to enals followed by an intramolecular hemiaminal formation with good yields and enantioselectivities. Moreover we studied the ‘in situ’ intramolecular
对映体纯的方式合成哌啶和哌啶衍生物一直是有机化学家的一个挑战性目标。在本报告中,我们开发了一种很好的级联反应,该反应是将氨甲酰胺酸迈克尔基化合物与烯丙基苯胺类化合物加成哌啶类化合物,然后在分子内形成具有良好收率和对映选择性的半胱氨酸。此外,我们研究了这种半胱氨酸与形成稠合哌啶-恶唑烷的醇的“原位”分子内环化。