Self-catalyzed direct amidation of ketones: A sustainable procedure for acetaminophen synthesis
作者:Elia Rancan、Fabio Aricò、Giuseppe Quartarone、Lucio Ronchin、Pietro Tundo、Andrea Vavasori
DOI:10.1016/j.catcom.2014.05.007
日期:2014.9
High yielding amination of ketones and benzaldehyde in acid-less conditions has been conducted on several ketones to achieve amides and nitriles. The reactivity of the selected substrates showed to depend on both oximation and Beckmann rearrangement reaction rates. Oximation allows the in-situ production of hydrochloric acid that enables Beckmann rearrangement of the oxime to form the corresponding
在无酸条件下,已对几种酮进行了高产率的酮和苯甲醛胺化反应,以生成酰胺和腈。所选底物的反应性显示出取决于肟化反应和贝克曼重排反应速率。氧化可以原位产生盐酸,从而使贝克曼重排肟以形成相应的酰胺或腈。值得注意的是,使用这种一锅法合成方法,可以很容易地从4-羟基苯乙酮开始以高收率合成N-乙酰基-4-氨基苯酚(对乙酰氨基酚药物)。乙酰苯胺和ε-己内酰胺也可以使用该合成方法有效地合成。