30 research outputs found
Hydrogen exchange between molecular tritium and bibenzyl in solution catalyzed by transition metals
Hydrogen-tritium exchange between molecular tritium and aromatic hydrocarbons in solution
Development of a specific radioimmunoassay for the detection of clenbuterol residues in treated cattle
Palladium-Catalyzed Sulfination of Aryl and Heteroaryl Halides: Direct Access to Sulfones and Sulfonamides
Nonselective BrominationâSelective Debromination Strategy: Selective Bromination of Unsymmetrical Ketones on Singly Activated Carbon against Doubly Activated Carbon
Synthesis of chloroesters by the reaction of ethers with acyl chlorides catalyzed by ZnO
Selective catalytic two-step process for ethylene glycol from carbon monoxide
Upgrading C1 chemicals (for example, CO, CO/H(2), MeOH and CO(2)) with CâC bond formation is essential for the synthesis of bulk chemicals. In general, these industrially important processes (for example, Fischer Tropsch) proceed at drastic reaction conditions (>250â°C; high pressure) and suffer from low selectivity, which makes high capital investment necessary and requires additional purifications. Here, a different strategy for the preparation of ethylene glycol (EG) via initial oxidative coupling and subsequent reduction is presented. Separating coupling and reduction steps allows for a completely selective formation of EG (99%) from CO. This two-step catalytic procedure makes use of a Pd-catalysed oxycarbonylation of amines to oxamides at room temperature (RT) and subsequent Ru- or Fe-catalysed hydrogenation to EG. Notably, in the first step the required amines can be efficiently reused. The presented stepwise oxamide-mediated coupling provides the basis for a new strategy for selective upgrading of C1 chemicals