A novel asymmetric nickel‐based procedure has been developed in which CO2 fixation is achieved as a second step of a truncated Heckcoupling. For this, a new chiral ligand has been prepared and shown to achieve enantiomeric excesses up to 99 %. The overall process efficiently furnishes chiral 2,3‐dihydrobenzofuran‐3‐ylacetic acids, an important class of bioactive products, from easy to prepare starting
We have developed a photoredox/Cu dual catalyzed enantioselective remote cyanation via1,4-heteroarylmigration. Experimental and computational studies have been carried out to reveal the reaction mechanism and explain the origins of the regio- and enantioselectivities of the remote cyanation process. This methodology exhibits mild conditions, a broad substrate scope and good regio- and enantioselectivities
Nickel-Catalyzed Atroposelective Cross-Electrophile Coupling of Aryl Halides: A General and Practical Route to Diverse MOP-Type Ligands
作者:Raphael S. Kim、Lebogang O. Kgoadi、Jacob C. Hayes、Derek P. Rainboth、Catherine M. Mudd、Glenn P. A. Yap、Donald A. Watson
DOI:10.1021/jacs.4c04608
日期:2024.7.3
We report a highly cross- and atroposelective coupling between ortho-(chloro)arylphosphine oxides and ortho-(bromo)aryl ethers. This previously unknown asymmetric nickel-catalyzed reaction offers a direct route to highly enantioenriched axially chiral biaryl monophosphine oxides that are difficult to access by other means. These products can be readily reduced to generate chiral MOP-type ligands bearing