SmCl<sub>3</sub>-Catalyzed <i>C-</i>Acylation of 1,3-Dicarbonyl Compounds and Malononitrile
作者:Quansheng Shen、Wen Huang、Jialiang Wang、Xigeng Zhou
DOI:10.1021/ol701961z
日期:2007.10.1
A recyclable, convenient, and efficient catalytic system for C-acylation of 1,3-dicarbonyl compounds and malononitrile with acid chlorides has been developed, giving moderate to excellent yields under mild conditions. This is the first catalytic example of such reactions. In addition, by applying this protocol as the key step, 3,5-disubstituted-1H-pyrazole-4-carboxylate can easily be synthesized in
已开发出一种可回收,方便且有效的催化体系,用于用酰氯对1,3-二羰基化合物和丙二腈进行C-酰化,在温和条件下产生中等至极好的收率。这是这种反应的第一个催化实例。另外,通过将该方案用作关键步骤,可以轻松地以一锅法高收率合成3,5-二取代-1H-吡唑-4-羧酸酯。