<scp>Nickel‐Catalyzed Cross‐Coupling</scp>
of Aryl Pivalates with Cyclobutanols Involving C—O and C—C Bond Cleavage
<sup>†</sup>
作者:Yi Gan、Ninghui Zhang、Shaoxu Huang、Yuanhong Liu
DOI:10.1002/cjoc.202000319
日期:2020.12
An efficient nickel‐catalyzed cross‐coupling of aryl pivalates with cyclobutanols is described. The use of Ni(cod)2/PCy3/base as the catalytic system enables the cleavage of inert C—O bond and C—Cbond under mild conditions, thus providing a facile access to γ‐arylated ketones in generally good to excellent yields. This transformation is also characterized by wide substrate scope and functional group
bisphosphine monochelation to transition metals under conditions where homogeneousligands may form bischelated single metal complexes or multinuclear complexes. PS-DPPBz showed high ligand performance in first-row transition metal catalysis, enabling challenging molecular transformations that were not possible through the screening of existing homogeneousligands. In the Ni-catalyzed amination of aryl
Nickel-Catalyzed Enantioselective CC Bond Formation through C sp 2O Cleavage in Aryl Esters
作者:Josep Cornella、Evan P. Jackson、Ruben Martin
DOI:10.1002/anie.201412051
日期:2015.3.23
We report the first enantioselective CCbondformation through CO bond cleavage using aryl ester counterparts. This method is characterized by its wide substrate scope and results in the formation of quaternary stereogenic centers with high yields and asymmetric induction.
Nickel-Catalyzed C–O Bond-Cleaving Alkylation of Esters: Direct Replacement of the Ester Moiety by Functionalized Alkyl Chains
作者:Xiangqian Liu、Jiaqi Jia、Magnus Rueping
DOI:10.1021/acscatal.7b00941
日期:2017.7.7
Two efficient protocols for the nickel-catalyzed aryl–alkyl cross-coupling reactions using esters as coupling components have been established. The methods enable the selective oxidative addition of nickel to acyl C–O and aryl C–O bonds and allow the aryl–alkyl cross-coupling via decarbonylative bond cleavage or through cleavage of a C–O bond with high efficiency and good functional group compatibility
A Mild Ni/Cu-Catalyzed Silylation via C<i>–</i>O Cleavage
作者:Cayetana Zarate、Ruben Martin
DOI:10.1021/ja412107b
日期:2014.2.12
A Ni/Cu-catalyzed silylation of unactivated C-O electrophiles derived from phenols or benzyl alcohols is described. This transformation is characterized by its wide scope and mild conditions, providing a direct access to synthetically versatile silylated compounds. The protocol allows for the coupling of C(sp(2))-O and even C(sp(3))-O bonds with similar efficiency.