Coumarin based novel ligands in the Suzuki–Miyaura and Mizoroki–Heck cross-couplings under aqueous medium
作者:Mohammed Waheed、Naseem Ahmed
DOI:10.1016/j.tetlet.2016.07.028
日期:2016.8
Coumarin-based novel ligands (benzylidine-bis-(4-hydroxycoumarin)-diethylamines) were easily synthesized using 4-hydroxycoumarin, aromatic aldehydes, and diethylamine. The ionic ligand structure was established by X-ray study. They are air and moisture stable ligands and have shown highly efficient catalytic activity with Pd(OAc)2 (0.1 mol % loading) in the Suzuki–Miyaura and (0.3 mol % loading) in
使用4-羟基香豆素,芳族醛和二乙胺可以轻松合成基于香豆素的新型配体(苄基双(4-羟基香豆素)-二乙胺)。通过X射线研究建立了离子配体结构。它们是空气和湿气稳定的配体,在铃木-Miyaura中的Pd(OAc)2(0.1 mol%负载)和Mizoroki-Heck交叉偶合反应中的Pd(OAc)2(在水中或0.3 mol%负载)中显示出高效的催化活性水/乙醇混合物。钯催化剂可以有效地重复使用,而不会影响反应中各种官能团。