作者:Yan Li、Deguang Liu、Lei Wan、Jun-Yang Zhang、Xi Lu、Yao Fu
DOI:10.1021/jacs.2c06279
日期:2022.8.3
Regiodivergent alkyne hydroalkylation to generate different isomers of an alkene from the same alkyne starting material would be beneficial; however, it remains a challenge. Herein, we report a ligand-controlledcobalt-catalyzed regiodivergent alkyne hydroalkylation. The sensible selection of bisoxazoline (L1) and pyridine–oxazoline (L8) ligands led to reliable and predictable protocols that provided
Nickel(0)-Catalyzed Heck Cross-Coupling via Activation of Aryl C–OPiv Bonds
作者:Andrew R. Ehle、Qi Zhou、Mary P. Watson
DOI:10.1021/ol203322v
日期:2012.3.2
Using a Ni(dppf) catalyst generated in situ, Heck cross-coupling of aryl pivalates with a variety of olefin partners has been accomplished. This method represents one of the first examples of a C C cross-coupling via activation of a strong C-O bond with a nonorganometallic coupling partner. It enables the transformation of phenol-based substrates into styrenyl products without generation of a halogenated byproduct or the use of expensive triflate groups.