Asymmetric Construction of Pyrrolidines Bearing a Trifluoromethylated Quaternary Stereogenic Center via Cu<sup>I</sup>
-Catalyzed 1,3-Dipolar Cycloaddition of Azomethine Ylides with β-CF<sub>3</sub>
-β,β-Disubstituted Nitroalkenes
作者:Li-Wei Tang、Bao-Jing Zhao、Li Dai、Man Zhang、Zhi-Ming Zhou
DOI:10.1002/asia.201600941
日期:2016.9.6
convenient method has been developed for the synthesis of optically active pyrrolidines bearing a quaternary stereogenic center containing a CF3 group at the C‐3 position of the pyrrolidine ring. The synthesis system, CuI/Si‐FOXAP‐catalyzed exo‐selective 1,3‐dipolar cycloaddition of azomethine ylides with β‐CF3‐β,β‐disubstituted nitroalkenes, provides pyrrolidines with high diastereoselectivities (up to
已经开发了一种直接便捷的方法来合成光学活性的吡咯烷,该吡咯烷在吡咯烷环的C-3位置带有一个含CF 3基团的季立体中心。合成体系,铜我/硅FOXAP催化外型与β-CF甲亚胺叶立德-选择性1,3-偶极环加成3 -β,β二取代硝基烯烃,提供吡咯烷以高非对映选择性(高达> 98:2博士)和出色的对映选择性(高达> 99.9 ee),并且在温和条件下对各种底物都具有良好的性能。