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.

中文翻译：

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与多卤代吡啶在Pd催化的胺化中反转常规化学选择性

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。