A Cobalt(II) Complex Bearing the Amine(imine)diphosphine PN(H)NP Ligand for Asymmetric Transfer Hydrogenation of Ketones
作者:Shangfei Huo、Hong Chen、Weiwei Zuo
DOI:10.1002/ejic.202000826
日期:2021.1.8
containing bis(amine)diphosphine PN(H)N(H)P ligand were synthesized. The structures of two complexes were characterized by X‐ray crystallography and high resolution mass spectrometry. The catalytic performances of cobalt complexes a and b for asymmetric transferhydrogenation (ATH) of ketones under mild conditions were evaluated using 2‐propanolisopropanol as solvent and hydrogen source after being activated
Because most pharmacologically active receptors are inherently asymmetric, the introduction of asymmetry into molecules that can bind to such receptors is a central topic in modern organic and bioorganic chemistry. We developed a metal charge-directed stereoinduction process in the asymmetrictransferhydrogenation of ketones catalyzed by first-row transition-metal (iron, cobalt, and nickel) amido
Kinetic Resolution of Secondary Alcohols Using Amidine-Based Catalysts
作者:Ximin Li、Hui Jiang、Eric W. Uffman、Lei Guo、Yuhua Zhang、Xing Yang、Vladimir B. Birman
DOI:10.1021/jo202220x
日期:2012.2.17
Kinetic resolution of racemic alcohols has been traditionally achieved via enzymatic enantioselective esterification and ester hydrolysis. However, there has long been considerable interest in devising nonenzymatic alternative methods for this transformation. Amidine-based catalysts (ABCs), a new class of enantioselective acyl transfer catalysts developed in our group, have demonstrated, inter alia, high efficacy in the kinetic resolution of benzylic, allylic, and propargylic secondary alcohols and 2-substituted cycloalkanols, and thus provide a viable alternative to enzymes.