Enantioselective Stetter Reactions of Enals and Modified Chalcones Catalyzed by N-Heterocyclic Carbenes
作者:Xinqiang Fang、Xingkuan Chen、Hui Lv、Yonggui Robin Chi
DOI:10.1002/anie.201105812
日期:2011.12.2
New trick for an old cat.: Triazolium‐based N‐heterocyclic carbenes (NHCs) catalyze the selective generation of acyl anion equivalents for the title reaction. The stereoelectronic properties of the enal‐derived Breslow intermediates and the unique reactivity of the modified chalcones are crucial for the Stetter reactions to occur. EWG=electron‐ withdrawing group.
一只老猫的新把戏。:基于三唑鎓的N杂环卡宾(NHC)催化标题反应中酰基阴离子当量的选择性生成。烯醛衍生的Breslow中间体的立体电子性质和改性查耳酮的独特反应性对于发生Stetter反应至关重要。EWG =吸电子基团。