Mono- and Dinuclear α-Diimine Nickel(II) and Palladium(II) Complexes in C–S Cross-Coupling
作者:Md Muktadir Talukder、Justin T. Miller、John Michael O. Cue、Chinthaka M. Udamulle、Abhi Bhadran、Michael C. Biewer、Mihaela C. Stefan
DOI:10.1021/acs.organomet.0c00732
日期:2021.1.11
significantly reduced by air and moisture sensitivity, as well as harsh reaction conditions. Herein, we report four highly air- and moisture-stable well-defined mononuclear and bridged dinuclear α-diimine Ni(II) and Pd(II) complexes for C–S cross-coupling. Various ligand frameworks, including acenaphthene- and iminopyridine-based ligands, were employed, and the resulting steric properties of the catalysts were
空气和水分的敏感性以及苛刻的反应条件大大降低了过渡金属催化体系在CS交叉偶联反应中的作用。在此,我们报告了用于C–S交叉偶联的四种高度空气和水分稳定的定义明确的单核和桥接双核α-二亚胺Ni(II)和Pd(II)配合物。使用了各种配体构架,包括基于ph和亚氨基吡啶的配体,并评估了催化剂的最终空间性质,并将其与反应结果相关联。在有氧条件和低温下,与以前报道的催化剂相比,Ni和Pd体系均表现出更宽的底物范围和官能团耐受性。由含有烷基,苄基和杂芳基的硫醇合成了40多种化合物。也,从硫醇和卤化物源掺入药学上有活性的杂芳基部分。值得注意的是,通过在广泛的底物范围内提供几乎定量的产率,桥接的双核五坐标Ni络合物的性能优于其余三个单四坐标或六坐标Ni的络合物。