Piperidinium borate catalyzed Knoevenagel condensation of carbonyl compounds with active methylenes
作者:Kanchan D. Gavali、Pawan R. Kudale、Ganesh U. Chaturbhuj
DOI:10.1016/j.tetlet.2023.154537
日期:2023.6
Knoevenagel condensation between aromatic, heterocyclic, α, β unsaturated aldehydes and aliphatic, cyclic ketones with active methylenes. Piperidinium borate can be easily prepared from widely available boric acid and piperidine. The present method showed the advantages of mild reaction conditions, wide and easy availability of starting materials, and higher product yields. In addition, all the products
硼酸哌啶鎓是一种有机共轭碱,在温和条件下作为催化剂可有效促进芳香杂环α、β不饱和醛与具有活性亚甲基的脂肪族环酮之间的Knoevenagel缩合。硼酸哌啶可以很容易地由广泛使用的硼酸和哌啶制备。本方法具有反应条件温和、原料来源广泛易得、产品收率高等优点。此外,所有产品都通过简单的过滤和水洗分离。AMG 837 的中间体,一种新的 GPR40 激动剂,是使用本协议中使用的类似反应条件合成的。此外,催化剂的可回收性和再利用性也非常好。