The first example of manganese-catalyzed C-alkylation of the carboxylic acid derivatives is reported. The bench-stable homogeneous manganese complex enables the transformation of the renewable alcohol and carboxylic acid derivative feedstock to higher value esters and amides. The reaction operates via hydrogen autotransfer and ideally produces water as the only side product. Importantly, aliphatic-
[EN] HYDROGENATION AND DEHYDROGENATION CATALYST, AND METHODS OF MAKING AND USING THE SAME<br/>[FR] CATALYSEUR D'HYDROGÉNATION ET DE DÉSHYDROGÉNATION, ET SES PROCÉDÉS DE FABRICATION ET D'UTILISATION
申请人:GOUSSEV DMITRI
公开号:WO2013023307A1
公开(公告)日:2013-02-21
The present application discloses complexes useful as catalysts for organic chemical synthesis including hydrogenation and dehydrogenation of unsaturated compounds or dehydrogenation of substrates. The range of hydrogenation substrate compounds includes esters, lactones, oils and fats, resulting in alcohols, diols, and triols as reaction products. The catalysts of current application can be used to catalyze a hydrogenation reaction under solvent free conditions. The present catalysts also allow the hydrogenation to proceed without added base, and it can be used in place of the conventional reduction methods employing hydrides of the main-group elements. Furthermore, the catalysts of the present application can catalyze a dehydrogenation reaction under homogenous and/or acceptorless conditions. As such, the catalysts provided herein can be useful in substantially reducing cost and improving the environmental profile of manufacturing processes for variety of chemicals.
Catalytic C<sub>1</sub>
Alkylation with Methanol and Isotope-Labeled Methanol
作者:Jan Sklyaruk、Jannik C. Borghs、Osama El-Sepelgy、Magnus Rueping
DOI:10.1002/anie.201810885
日期:2019.1.14
A metal‐catalyzed methylation process has been developed. By employing an air‐ and moisture‐stable manganese catalyst together with isotopically labeled methanol, a series of D‐, CD3‐, and 13C‐labeled products were obtained in good yields undermild reaction conditions with water as the only byproduct.
Hydrogenation of CO<sub>2</sub>
-Derived Carbonates and Polycarbonates to Methanol and Diols by Metal-Ligand Cooperative Manganese Catalysis
作者:Viktoriia Zubar、Yury Lebedev、Luis Miguel Azofra、Luigi Cavallo、Osama El-Sepelgy、Magnus Rueping
DOI:10.1002/anie.201805630
日期:2018.10.8
The first base‐metal‐catalysed hydrogenation of CO2‐derived carbonates to alcohols is presented. The reaction proceeds under mild conditions in the presence of a well‐defined manganese complex with a loading as low as 0.25 mol %. The non‐precious‐metal homogenous catalytic system provides an indirect route for the conversion of CO2 into methanol with the co‐production of value‐added (vicinal) diols
Aldehyde effect and ligand discovery in Ru-catalyzed dehydrogenative cross-coupling of alcohols to esters
作者:Xiaolin Jiang、Jiahui Zhang、Dongmei Zhao、Yuehui Li
DOI:10.1039/c8cc10315a
日期:——
ligands for dehydrogenation of alcohols. Accordingly, hybrid multi-dentate ligands were discovered based on an oxygen-transfer alkylation of PNP ligands by aldehydes. The relevant Ru-PNN(PO) system provided the desired unsymmetrical esters in good yields via acceptorless dehydrogenation of alcohols. Hydrogen bonding interactions between the phosphine oxide moieties and alcohol substrates likely assisted