A mild, efficient and catalytic ligand-free method for the direct arylation of 5-pyrazolones by Pd-catalyzed C-H bond activation is reported. The process smoothly proceeds and yields are moderate to excellent.
Rapid “Mix-and-Stir” Preparation of Well-Defined Palladium on Carbon Catalysts for Efficient Practical Use
作者:Sergey A. Yakukhnov、Evgeniy O. Pentsak、Konstantin I. Galkin、Roman M. Mironenko、Vladimir A. Drozdov、Vladimir A. Likholobov、Valentine P. Ananikov
DOI:10.1002/cctc.201700738
日期:2018.4.24
A facile direct deposition approach for the preparation of recyclable Pd/C catalysts simply by stirring a solution of tris(dibenzylideneacetone)dipalladium(0) with a suitable carbon material was evaluated. An extraordinarily rapid catalyst preparation procedure (<5 min) under mild conditions and its excellent performance in cross‐coupling and hydrogenation reactions were demonstrated. The key point
评价了一种简单的直接沉积方法,该方法用于简单地通过搅拌三(二亚苄基丙酮)二钯(0)与合适的碳材料的溶液来制备可回收的Pd / C催化剂。证明了在温和条件下非常快速的催化剂制备程序(<5分钟)及其在交叉偶联和加氢反应中的优异性能。催化剂设计的关键是将Pd 0中心直接沉积在高度可及的表面积上,避免出现不确定的Pd II / Pd 0状态。