An orthogonal bimetallicrelay catalytic strategy capable of enantioselectively imbedding a boryl functionality at a remote, less-activated site of aryl alkenes is disclosed. This approach was applicable to unactivated terminal and internal alkenes, as well as a mixture of olefin isomers, thus leading to the corresponding chiral products with a boryl-substituted stereogenic center β to a functional
Alkylboronic Esters from Palladium- and Nickel-Catalyzed Borylation of Primary and Secondary Alkyl Bromides
作者:Jun Yi、Jin-Hui Liu、Jun Liang、Jian-Jun Dai、Chu-Ting Yang、Yao Fu、Lei Liu
DOI:10.1002/adsc.201200136
日期:2012.6.18
Palladium‐ and nickel‐catalyzed cross‐coupling recations of unactivated alkyl bromides with diboron reagents have been developed as practical methods for the synthesis of primary and secondaryalkylboronic esters. These reactions extend the concept and utility of Pd‐ and Ni‐catalyzed cross‐coupling of aliphatic electrophiles. They also show different substrate selectivity and ligand dependence as compared