Synthesis of Ferrocene Derivatives with Planar Chirality via Palladium-Catalyzed Enantioselective C–H Bond Activation
摘要:
The first catalytic and enantioselective C-H direct acylation of ferrocene derivative has been developed A series of 2-acyl-1-dimethylaminomethylferrocenes with planar chirality were provided under highly efficient and concise one-pot condition with up to 85% yield and 98% ee. The products obtained could be easily converted to various chiral ligands via diverse trans formations.
It was firstly found that the Rieke Ni generated in situ was able to promote the pinacol coupling of various carbonyls efficiently. Based on this information, another catalytically effective, cheaper and more convenient NiCl2(Cat.)/Mg/TMSCl system was designed and developed further successfully. The interesting single-electron transfer (SET) mechanisms for the coupling reactions were proposed. Additionally
Application of coumarin dyes for organic photoredox catalysis
作者:Andrea Gualandi、Giacomo Rodeghiero、Emanuele Della Rocca、Francesco Bertoni、Marianna Marchini、Rossana Perciaccante、Thomas Paul Jansen、Paola Ceroni、Pier Giorgio Cozzi
DOI:10.1039/c8cc04048f
日期:——
Here we report the application of readily prepared and available coumarin dyes for photoredoxcatalysis, which are able to mimic powerful reductant [Ir(III)] complexes. Coumarin derivatives 9 and 10 were employed as photoreductants in pinacol coupling and in other reactions, in the presence of Et3N as a sacrificial reducing agent. As the electronic, photophysical, and steric properties of coumarins
Effect of Fluoride Salts on Metal-Mediated Reactions. Aluminum/Fluoride Salt-Mediated Reduction and Pinacol Coupling of Carbonyl Compounds in Aqueous Media
作者:Lian-Hai Li、Tak Hang Chan
DOI:10.1021/ol0000399
日期:2000.4.1
[formula: see text] Metal fluoridesalts were found to activate aluminum in water to react with carbonyl compounds to give the pinacol coupling products and/or the reduced alchohols. The metal ion of the fluoride salt was found to play a role in controlling the chemoselectivity and stereoselectivity of the reaction.
REDUCTIVE COUPLING OF AROMATIC ALDEHYDES BY OCTACARBONYL DIFERRATE
作者:Keiji Ito、Saburo Nakanishi、Yoshio Otsuji
DOI:10.1246/cl.1980.1141
日期:1980.9.5
The reaction of aromaticaldehydes with Fe(CO)5 or Fe3(Co)12 in pyridine gives the corresponding 1,2-diaryl-1,2-ethanediols as major products in good yields. A reactive species of this reaction is octacarbonyl diferrate [Fe2(CO)8]2−.