Highly Efficient Synthesis of a Class of Novel Chiral-Bridged Atropisomeric Monophosphine Ligands via Simple Desymmetrization and Their Applications in Asymmetric Suzuki–Miyaura Coupling Reaction
A series of novel chiral-bridged atropisomeric monophosphine ligands were synthesized via convenient and simple pathways. The prepared ligands, especially for ligand 7d, were found to be highly effective in the Pd-catalyzed Suzuki–Miyauracouplingreaction. The steric hindrance and electronic effect of substrates on the reactivity and enantioselectivity were explored preliminarily.
Palladium-Catalyzed Asymmetric C–H Arylation for the Synthesis of Planar Chiral Benzothiophene-Fused Ferrocenes
作者:Bing-Bin Xu、Jie Ye、Yu Yuan、Wei-Liang Duan
DOI:10.1021/acscatal.8b03912
日期:2018.12.7
An intramolecular enantioselective C–H arylation of ferrocenyl aryl sulfides was performed with a palladium catalyst. Planarchiral thiophene compounds with a ferrocene skeleton were constructed in good enantioselectivities (up to 99% ee) and high yields, and the utility of the obtained chiral sulfides as ligands in catalytic reactions has been demonstrated.