Results 171 to 180 of about 35,023 (278)
Hydrogenase Enzymes and Their Synthetic Models: The Role of Metal Hydrides. [PDF]
Chem Rev, 2016 Schilter D +4 more
europepmc +1 more source
European Journal of Organic Chemistry, EarlyView.An improved synthesis of a manganese catalyst used for hydrogenation of ketones, esters and imines is reported. The catalyst has now been found to effect tandem conjugate reduction‐ester hydrogenations with very low amounts of allylic alcohol by‐products.
José A. Fuentes, Matthew L. Clarke
wiley +1 more source
European Journal of Organic Chemistry, EarlyView.We report a carbonylation‐homolysis process to access acyl radicals that can undergo decarboxylation or cyclization onto tethered alkenes. In both cases, ligands and additives are shown to influence the outcome to give saturated or unsaturated products, in some cases with isomerization of the initial products.
Jacob N. Hackbarth +4 more
wiley +1 more source
European Journal of Organic Chemistry, EarlyView.The total synthesis of the manzamine alkaloid keramamine C (2) in its racemic form was achieved in 5 steps, with ring‐closing metathesis as the key step. The metathesis is strongly improved by an intramolecular H‐bond‐induced conformational fixation of the amide bond, inducing close proximity of the terminal double bonds in the precursor molecule.
Jana Ganzmann +4 more
wiley +1 more source
Synthesis of Sulfur Heterocycles by Palladium‐Catalyzed Cyclization
European Journal of Organic Chemistry, EarlyView.In spite of the well‐known palladium thiophilicity, sulfur‐containing acyclic substrates may efficiently undergo several different kinds of palladium‐catalyzed cyclization processes leading to highly important sulfur heterocycles in one synthetic step. Advances in this challenging and stimulating field of research are presented in this review.
Bartolo Gabriele
wiley +1 more source
European Journal of Organic Chemistry, EarlyView.Organic azides are readily reduced to amines under mild conditions by ammonia borane complex, catalyzed by a low loading level of reusable Au nanoparticles supported on TiO2. We present the first protocol for the chemoselective reduction of organic azides to amines by ammonia borane complex. In the presence of a low catalytic amount of Au nanoparticles
Elisavet‐Maria Zantioti‐Chatzouda +5 more
wiley +1 more source
Silyl Rearrangements in Gold‐Catalyzed Transformations
European Journal of Organic Chemistry, EarlyView.The synergy between the exceptional ability of gold catalysts to activate unsaturated substrates and the inherent tendency of organosilicon reagents to undergo silyl‐group rearrangements has unlocked a range of novel transformations, enabling access to otherwise challenging molecular architectures.
Patricia García‐Martínez +1 more
wiley +1 more source
Acceleration of CO2 insertion into metal hydrides: ligand, Lewis acid, and solvent effects on reaction kinetics. [PDF]
Chem Sci, 2018 Heimann JE +3 more
europepmc +1 more source
European Journal of Organic Chemistry, EarlyView.A sustainable, ligand‐free Pd‐catalyzed borrowing hydrogen protocol in a biodegradable hydrophobic natural deep eutectic solvent (NADES) (thymol/DL‐menthol) enables the N‐alkylation of primary amines with benzylic alcohols under mild, aerobic conditions, allowing efficient reuse of both catalyst and solvent for seven consecutive cycles. The hydrophobic
Maryam Saeb +5 more
wiley +1 more source