Diastereo- and Enantioselective Copper(I)-Catalyzed Intermolecular [3+2] Cycloaddition of Azomethine Ylides with β-Trifluoromethyl β,β-Disubstituted Enones
作者:Zhan-Ming Zhang、Bing Xu、Shan Xu、Hai-Hong Wu、Junliang Zhang
DOI:10.1002/anie.201602542
日期:2016.5.17
Reported herein is an asymmetric [3+2] cycloaddition reaction of azomethine ylides with β‐trifluoromethyl β,β‐disubstituted enones, a reaction which is enabled by a Ming‐Phos‐derived copper(I) catalyst (Ming‐Phos=chiral sulfinamide monophosphines, Figure 2). This method provides scalable and efficient access to the highly substituted pyrrolidines with a trifluoromethylated, all‐carbon quaternary stereocenter
本文报道了甲亚胺基化物与β-三氟甲基β,β-二取代的烯酮的不对称[3 + 2]环加成反应,该反应由Ming-Phos衍生的铜(I)催化剂实现(Ming-Phos =手性亚磺酰胺)单膦,图2)。该方法可提供高收率,高达20:1 dr和98%ee的高收率,高收率的三氟甲基化全碳四级立体中心与高度取代的吡咯烷的连接。该反应具有广泛的底物范围并且可以耐受多种官能团。