作者:Takeshi Yamada、Tomoyasu Hirose、Satoshi Ōmura、Toshiaki Sunazuka
DOI:10.1002/ejoc.201403313
日期:2015.1
reaction. However, this catalytic process was limited. Herein, we report the first examples of 3,5,6-trifluoro-2-pyridone-catalyzed α-addition of isocyanides to aldehydes, in the presence of water in benzene, to provide α-hydroxyamides. Various aldehydes and isocyanides performed well in this reaction to provide the α-hydroxyamides. Even highly constrained substrates were well tolerated. The reaction
α-羟基酰胺是一种重要的化学成分,广泛存在于具有生物活性的天然产物中。获取 α-羟基酰胺的最直接方法之一是 Passerini 型反应。然而,这种催化过程是有限的。在此,我们报告了在苯中存在水的情况下,3,5,6-三氟-2-吡啶酮催化的异氰化物与醛的α-加成反应以提供α-羟基酰胺的第一个例子。各种醛和异氰化物在该反应中表现良好以提供 α-羟基酰胺。即使是高度受限的底物也能被很好地耐受。该反应不受不方便的温度控制、惰性气氛或干燥溶剂的要求的限制。新的催化反应可能为开发异氰化物的不对称有机催化 α-加成开辟道路。