Chiral oxazolidinones as electrophiles: intramolecular cyclization reactions with carbanions and preparation of functionalized lactams
作者:Sarah Gibson、Hollie K. Jacobs、Aravamudan S. Gopalan
DOI:10.1016/j.tetlet.2010.12.062
日期:2011.2
The intramolecular cyclizations of oxazolidinones with carbanions adjacent to sulfones, sulfoxides, and phosphonates proceed in high yields to obtain functionalized γ and δ lactams. The chiral oxazolidinone precursors can be readily synthesized from commercial amino acids. The lactams from this study are useful synthetic intermediates, as demonstrated by the synthesis of a precursor for levetiracetam
恶唑烷酮与与砜、亚砜和膦酸盐相邻的碳负离子的分子内环化以高产率进行,以获得功能化的 γ 和 δ 内酰胺。手性恶唑烷酮前体可以很容易地从商业氨基酸合成。本研究中的内酰胺是有用的合成中间体,如左乙拉西坦(一种抗癫痫药物)前体的合成所证明的那样。