作者:Nieves Fresno、Ruth Pérez-Fernández、Pilar Goya、Ma Luisa Jimeno、Ibón Alkorta、José Elguero、Laura Menéndez-Taboada、Santiago García-Granda
DOI:10.1016/j.tet.2011.09.083
日期:2011.11
Starting from Evans’ imidazolidin-2-one (1) two compounds were obtained by trans-N-acylation: the expected one 3 with S,R configuration and a second compound 5, that is, related to 3 by the loss of a CH(CH3)CO fragment. The stereochemistry of 3 was established by NMR spectroscopy, mainly NOE experiments, as expected, the new center has an S configuration, the compound being thus S,R. The structure
从Evans的咪唑烷-2-酮开始(1被获得)两种化合物反式-N-酰化:预期的一个3与小号,- [R构型和第二化合物5,即,涉及到3由CH的损失(CH 3)C O片段。3的立体化学是通过NMR光谱法(主要是NOE实验)建立的,正如预期的那样,新的中心具有S构型,因此化合物为S,R。化合物5的结构通过X射线晶体学确定。5的形成机理 被提出。