Experiment and Theory of Bimetallic Pd-Catalyzed α-Arylation and Annulation for Naphthalene Synthesis
作者:Chloe C. Ence、Erin E. Martinez、Samuel R. Himes、S. Hadi Nazari、Mariur Rodriguez Moreno、Manase F. Matu、Samantha G. Larsen、Kyle J. Gassaway、Gabriel A. Valdivia-Berroeta、Stacey J. Smith、Daniel H. Ess、David J. Michaelis
DOI:10.1021/acscatal.1c02731
日期:2021.8.20
We report the synthesis of bimetallic Pd(I) and Pd(II) complexes with bidentate 2-phosphinoimidazole ligands and their catalytic activity to generate substituted naphthalenes. This process involves the coupling of an aryl iodide and 2 equiv of a ketone via sequential ketone α-arylation and then annulation to generate disubstituted and tetrasubstituted naphthalenes in a regioselective manner. Excellent
我们报告了双金属 Pd(I) 和 Pd(II) 配合物与双齿 2-膦基咪唑配体的合成及其产生取代萘的催化活性。该过程包括芳基碘化物和 2 当量的酮通过连续的酮 α-芳基化偶联,然后成环以区域选择性方式生成二取代和四取代的萘。证明了芳基碘化物和酮伙伴的出色底物范围,包括杂芳基碘化物的底物范围。在这种转变中,双金属 Pd 配合物比单金属 Pd 催化剂更具反应性。密度泛函理论计算、同位素效应实验和底物竞争实验用于检查双金属机制、反应性和选择性。