Phase-Transfer-Catalyzed Enantioselective α-Hydroxylation of Acyclic and Cyclic Ketones with Oxygen
作者:Sui-Boon Derek Sim、Min Wang、Yu Zhao
DOI:10.1021/acscatal.5b00583
日期:2015.6.5
An efficient and enantioselective alpha-hydroxylation of acyclic as well as cyclic ketones using molecular oxygen has been developed. This simple catalytic procedure uses a readily available phase transfer catalyst and produces a wide range of valuable tertiary a-hydroxy ketones in good to excellent enantiopurity.
Intermolecular Markovnikov-Selective Hydroacylation of Olefins Catalyzed by a Cationic Ruthenium–Hydride Complex
作者:Junghwa Kim、Chae S. Yi
DOI:10.1021/acscatal.6b00856
日期:2016.5.6
The cationic Ru–H complex was found to be an effective catalyst for the intermolecularhydroacylation of aryl-substituted olefins with aldehydes to form branched ketone products. The preliminary kinetic and spectroscopic studies elucidated a ruthenium-acyl complex as the key intermediate species. The catalytic method directly afforded branched ketone products in a highly regioselective manner while
Asymmetric Electrophilic Amination and Hydrazination of Acyclic α-Branched Ketones for the Formation of α-Tertiary Amines and Hydrazines
作者:Barry M. Trost、Jacob S. Tracy、Eric Y. Lin
DOI:10.1021/acscatal.9b04246
日期:2019.12.6
electrophilic amination of α-branched ketones utilizing di-tert-butyl azodicarboxylate as the electrophilic nitrogen source. This process, catalyzed by a dinuclear zinc-ProPhenol complex, proceeds under mild reaction conditions and with a diverse range of vinyl ketones. The reactions can be run on gram-scale with reduced catalyst loadings and feature a recoverable ligand. The hydrazine products are