piperidine structures are reported. We have also developed a simple route to access to fully diastereo- and enantioenriched substituted piperidinones. The key step of all this synthesis relies on a diastereoselective Mannich reaction, employing the readily available aminoalcohol (+)-(S,S)-pseudoephedrine as a chiral auxiliary, which allows the preparation of β-aminocarbonyl compounds in high yield, diastereo
报道了两种用于制备高度对映体富集的
哌啶结构的有效和替代方案。我们还开发了一种获取完全非对映体和对映体富集的取代
哌啶子酮的简单途径。所有这些合成的关键步骤都依赖于非对映选择性曼尼希反应,采用现成的
氨基醇(+)-(S,S)-伪
麻黄碱作为手性助剂,从而可以高收率,非对映异构和高纯度制备β-
氨基羰基化合物。对映选择性并使用易于扩展的协议。