Inverting Conventional Chemoselectivity in Pd-Catalyzed Amine Arylations with Multiply Halogenated Pyridines
作者:Mitchell H. Keylor、Zachary L. Niemeyer、Matthew S. Sigman、Kian L. Tan
DOI:10.1021/jacs.7b05409
日期:2017.8.9
A new catalyst system capable of selective chloride functionalization in the Pd-catalyzed amination of 3,2- and 5,2- Br/Cl-pyridines is reported. A reaction optimization strategy employing ligand parametrization led to the identification of 1,1′-bis[bis(dimethylamino)phosphino]ferrocene “DMAPF”, a readily available yet previously unutilized diphosphine, as a uniquely effective ligand for this transformation
报道了一种能够在Pd催化的3,2-和5,2- Br / Cl-吡啶的胺化反应中实现选择性氯化物官能化的新型催化剂体系。利用配体参数化的反应优化策略导致鉴定出1,1'-双[双(二(二甲基氨基)膦基]二茂铁“ DMAPF”,一种易于获得但尚未使用的二膦,作为该转化的独特有效配体。