Two Ligands Transfer from Ag to Pd: En Route to (SIPr)Pd(CF<sub>2</sub>H)(X) and Its Application in One-Pot C–H Borylation/Difluoromethylation
作者:Haiwei Zhao、Simon Herbert、Tom Kinzel、Wei Zhang、Qilong Shen
DOI:10.1021/acs.joc.9b03296
日期:2020.3.6
A process for the concurrent transfer of both the NHC ligand and the difluoromethyl group from [(SIPr)Ag(CF2H)] to PdX2 (X = Cl, OAc, and OPiv) for the preparation of [(SIPr)Pd(CF2H)X] complexes is described. These complexes were air-stable and easily underwent transmetalation with aryl pinacol boronate/reductive elimination to generate ArCF2H in high yields. Based on this discovery, the first one-pot
NHC配体和二氟甲基基团从[(SIPr)Ag(CF2H)]同时转移到PdX2(X = Cl,OAc和OPiv)的过程,用于制备[(SIPr)Pd(CF2H)X描述复合物。这些络合物是空气稳定的,易于通过芳基频哪醇硼酸酯/还原消除进行重金属化,从而以高收率生成ArCF2H。基于这一发现,开发了用于制备二氟甲基化(杂)芳烃的第一个单锅CH硼化和二氟甲基化方法。