Copper-Mediated, Palladium-Catalyzed Coupling of Thiol Esters with Aliphatic Organoboron Reagents
摘要:
Thiol esters and B-alkyl-9-BBN derivatives couple in the presence of a copper(I) carboxylate mediator and a palladium catalyst. In contrast to copper-mediated, palladium-catalyzed cross-couplings of thioorganics with boronic acids, the current coupling reaction of 9-BBN derivatives is facilitated by the addition of a base such as Cs2CO3. Under optimized conditions, a variety of thiol esters react with different B-alkyl-9-BBN derivatives giving ketones in moderate to excellent yields.
A novel catalytic hydrogen‐autotransfer protocol for the atom‐efficient α‐alkylation of ketones with readily available alcohols is presented. The use of manganese complexes bearing non‐innocent PNP pincer ligands enabled the functionalization of a broad range of valuable ketones, including 2‐oxindole, estrone 3‐methyl ether, and testosterone. Mechanistic investigations suggest the participation of
Nickel‐catalyzed α‐alkylation of ketones with benzyl alcohols
作者:Di Wu、Yubin Wang、Min Li、Lei Shi、Jichang Liu、Ning Liu
DOI:10.1002/aoc.6493
日期:2022.2
We reported an efficient method for α-alkylation of ketones with benzyl alcohols using the pyridine-bridged pincer-type N-heterocyclic carbenes nickel complexes as catalysts. A wide range of ketones and benzyl alcohols were efficiently converted into various alkylated products in moderate to high yields. In addition, these nickel complexes were also successfully applied for the synthesis of a wide
From selective transfer hydrogenation to selective hydrogen auto-transfer process: An efficient method for the synthesis of alkenyl ketones via iridium-catalyzed α-alkylation of ketones with alkenyl alcohols
作者:Xiangchao Xu、Chenchen Yang、Shun Li、Chong Meng、Junjie Yu、Jiazhi Yang、Feng Li
DOI:10.1016/j.jcat.2021.08.038
日期:2021.10
in the ligand are crucial for the activity of catalyst and selective transfer hydrogenation is the determining step of the formation of alkenyl ketones as products. Notably, the present research exhibited also the unique potential of metal–ligand bifunctional catalysts for the activation of unsaturated alcohols as electrophiles for hydrogen auto-transfer process.
Inter- and intramolecular hydroacylation of alkenes employing a bifunctional catalyst system
作者:Nicolas R. Vautravers、Damien D. Regent、Bernhard Breit
DOI:10.1039/c1cc10683j
日期:——
Based on a conceptually innovative bifunctional P,N ligand, an efficient protocol for the rhodium-catalyzed inter- and intramolecular hydroacylation of alkenes has been developed.