Cross‐Coupling of Secondary Amides with Tertiary Amides: The Use of Tertiary Amides as Surrogates of Alkyl Carbanions for Ketone Synthesis
作者:Shu‐Ren Wang、Pei‐Qiang Huang
DOI:10.1002/cjoc.201900215
日期:2019.9
has been made in the field of direct transformation of amides, nevertheless, the condensation between two amides remains rare and restricted to homo‐coupling reactions. Herein, we report the cross‐coupling of secondary amides with tertiary amides, which provides a synthesis of ketones under mild conditions, and features the use of tertiary amides as surrogates of alkyl carbanions. The method relies on
近年来,在酰胺的直接转化领域取得了令人兴奋的进展,尽管如此,两种酰胺之间的缩合仍然很少,并且仅限于均偶联反应。本文中,我们报道了仲酰胺与叔酰胺的交叉偶联,这可在温和条件下提供酮的合成,并具有使用叔酰胺作为烷基碳负离子的替代物的功能。该方法依赖于由叔酰胺通过用Vaska催化剂催化部分还原叔酰胺而产生的烯胺与由仲酰胺通过三氟甲磺酸酐活化而原位形成的腈离子的偶联,以及随后的甲酰化作用。