A5023705709- Asymmetric Hydrogenation and Catalysis
- Nanomaterials for catalytic reactions
- Inorganic and Organometallic Chemistry
- Chemical Synthesis and Reactions
- Catalysis for Biomass Conversion
- Carbon dioxide utilization in catalysis
- Chemical Synthesis and Analysis
- Ammonia Synthesis and Nitrogen Reduction
- Thermal and Kinetic Analysis
- Catalytic C–H Functionalization Methods
- Catalysis and Hydrodesulfurization Studies
- Catalytic Processes in Materials Science
- Chemistry and Chemical Engineering
- Chemical Reactions and Isotopes
- Oxidative Organic Chemistry Reactions
- Multicomponent Synthesis of Heterocycles
- Chemical Reaction Mechanisms
- Analytical chemistry methods development
- Electrochemical Analysis and Applications
- Synthesis and Catalytic Reactions
- Catalysts for Methane Reforming
- Phenothiazines and Benzothiazines Synthesis and Activities
- Synthesis and Biological Evaluation
- Electrocatalysts for Energy Conversion
- Fluorine in Organic Chemistry
Leibniz Institute for Catalysis
2016-2025
VSB - Technical University of Ostrava
2023-2025
REVA University
2021-2025
Bangalore University
2005-2022
University of Rostock
2010-2017
Vellore Institute of Technology University
2009-2012
Technion – Israel Institute of Technology
2010
Sri Venkateswara University
2010
University of Florida
2008
Lighter Hydrogenation Catalysts Enzymes have evolved to use abundant metals such as iron, cobalt, and nickel for redox catalysis. However, synthetic catalysis has generally relied on the rarer, heavier relatives of these elements: ruthenium, rhodium, iridium, palladium, platinum (see Perspective by Bullock ). Friedfeld et al. (p. 1076 ) used high-throughput screening show that right cobalt precursor can be activated asymmetric hydrogenation using traditional ligands developed precious...
A MOF sets the stage to make amines Reductive amination is a common method that chemists use carbon-nitrogen bonds. The reaction, which often requires precious metal catalysts, couples ammonia or other with carbonyl compounds and then hydrogen. Jagadeesh et al. report class of nonprecious cobalt nanoparticles catalyze this reaction across very broad range substrates, including complex molecules pharmaceutical interest (see Perspective by Chen Xu). was first embedded in metal-organic...
Novel cobalt-based heterogeneous catalysts have been developed for the direct oxidative esterification of alcohols using molecular oxygen as benign oxidant. Pyrolysis nitrogen-ligated cobalt(II) acetate supported on commercial carbon transforms typical homogeneous complexes to highly active and selective Co3O4-N@C materials. By applying these in presence oxygen, cross self-esterification esters proceeds good excellent yields.
Abstract The production of primary benzylic and aliphatic amines, which represent essential feedstocks key intermediates for valuable chemicals, life science molecules materials, is central importance. Here, we report the synthesis this class amines starting from carbonyl compounds ammonia by Ru-catalyzed reductive amination using H 2 . Key to success use a simple RuCl (PPh 3 ) catalyst that empowers >90 various linear branched benzylic, heterocyclic, under industrially viable scalable...
Abstract The hydrogenation of nitriles to amines represents an important and frequently used industrial process due the broad applicability resulting products in chemistry life sciences. Despite existing portfolio catalysts reported for nitriles, development iron-based heterogeneous this is still a challenge. Here, we show that impregnation pyrolysis iron(II) acetate on commercial silica produces reusable Fe/Fe–O@SiO 2 catalyst with well-defined structure comprising fayalite phase at Si–Fe...
Efficient and general methods for the synthesis of amines remain in high demand chemical industry. Among many known processes, catalytic hydrogenation is a cost-effective industrially proven reaction currently used to produce wide array such compounds. We report homogeneous nickel catalyst hydrogenative cross coupling range aromatic, heteroaromatic, aliphatic nitriles with primary secondary or ammonia. This protocol showcased by straightforward highly selective >230 functionalized...
Pyrolysis of iron-phenanthroline complexes supported on carbon leads to highly selective catalysts for the reduction structurally diverse nitroarenes anilines in 90-99% yields. Excellent chemoselectivity nitro group is demonstrated.
Nanoscaled iron oxides on carbon were modified with nitrogen-doped graphene (NGr) and found to be excellent catalysts for the chemoselective transfer hydrogenation of nitroarenes anilines. Under standard reaction conditions, a variety functionalized structurally diverse anilines, which serve as key building blocks central intermediates fine bulk chemicals, synthesized in good yields.
Abstract A general epoxidation of aromatic and aliphatic olefins has been developed under mild conditions using heterogeneous Co x O y –N/C ( =1,3; =1,4) catalysts tert ‐butyl hydroperoxide as the terminal oxidant. Various stilbenes alkenes, including renewable olefins, vitamin cholesterol derivatives, were successfully transformed into corresponding epoxides with high selectivity often good yields. The cobalt oxide catalyst can be recycled up to five times without significant loss activity...
The functionalized anilines have been synthesized by the transfer hydrogenation of nitroarenes using cobalt oxide-based nanocatalysts.
Abstract The CF 3 group is an omnipresent motif found in many pharmaceuticals, agrochemicals, catalysts, materials, and industrial chemicals. Despite well‐established trifluoromethylation methodologies, the straightforward selective introduction of such groups into (hetero)arenes using available less expensive sources still a major challenge. In this regard, synthesis various trifluoromethyl‐substituted by palladium‐catalyzed C−H functionalization herein reported. This novel methodology...
A novel iron-catalyzed transfer hydrogenation of alkynes to the corresponding alkenes applying formic acid as a hydrogen donor is reported. An in situ combination Fe(BF4)2·6H2O and tetraphos allows for highly selective broad range aromatic aliphatic tolerating different functional groups.
The preparation of nickel nanoparticles as efficient reductive amination catalysts by pyrolysis in situ generated Ni-tartaric acid complex on silica is presented. resulting stable and reusable Ni-nanocatalyst enables the synthesis functionalized structurally diverse primary benzylic, heterocyclic aliphatic amines starting from inexpensive readily available carbonyl compounds ammonia presence molecular hydrogen. Applying this Ni-based protocol, -NH2 moiety can be introduced compounds, for...
Pyrolysis of cobalt-terephthalic acid MOF template on carbon produces highly active and selective cobalt nanoparticles-based hydrogenation catalysts.
N-Methylated amines play an important role in regulating the biological and pharmaceutical properties of all kinds life science molecules. In general, this class compounds is synthesized via reductive amination reactions using high pressure molecular hydrogen. Thus, on laboratory scale especially drug discovery, activated (toxic) methyl such as iodide dimethyl sulfate are still employed, which also generate significant amounts waste. Therefore, development more convenient operationally...
Abstract Herein, we report the synthesis of specific silica‐supported Co/Co 3 O 4 core–shell based nanoparticles prepared by template cobalt‐pyromellitic acid on silica and subsequent pyrolysis. The optimal catalyst material allows for general selective hydrogenation pyridines, quinolines, other heteroarenes including acridine, phenanthroline, naphthyridine, quinoxaline, imidazo[1,2‐a]pyridine, indole under comparably mild reaction conditions. In addition, recycling these Co their ability...