Palladium-catalyzed C–N bond formation: synthesis of 1-aryl-1H-pyrazoles from β-bromovinyl aldehydes and arylhydrazines
作者:Chan Sik Cho、Daksha B. Patel
DOI:10.1016/j.tet.2006.04.031
日期:2006.6
Cyclic and acyclic β-bromovinyl aldehydes are cyclized with an array of arylhydrazines in toluene at 125 °C in the presence of a palladium catalyst and a phosphorus chelating ligand together with NaOtBu to give 1-aryl-1H-pyrazoles in moderate to good yields.
在钯催化剂和磷螯合配体以及NaO t Bu的存在下,在125°C下,用一系列芳基肼在甲苯中将环状和无环β-溴乙烯基醛环化,得到中度至中等浓度的1-芳基-1 H-吡唑良品率高。