The IPrAuNTf2/HNTf2 co-catalyzed cyclization of N-(2-perfluoroalkyl-3-alkynyl) hydroxylamines produces pyrroles in moderate to excellent yield, whereas the AgOTf-catalyzed reaction affords cyclic nitrones in high yields.

Transition metal-catalyzed addition of arylboronic acids to 2-formylbenzoates afforded 3-substituted phthalides. By using SPINOL-based phosphites as ligands, a Rh(I)-catalyzed asymmetric version of such an addition reaction was achieved.

A click reaction (copper-catalyzed azide-alkyne cycloaddition) catalyzed by "naked" copper ions (without ligands) generated in situ from a copper substrate by laser ablation in a high-voltage assisted laser desorption/ionization (HALDI) ion source is demonstrated.

Aryl N-aminosulfonamides could be easily produced via a palladium-catalyzed coupling of aryl halides, potassium metabisulfite, and hydrazines. Potassium metabisulfite is an excellent equivalent of sulfur dioxide in the reaction of palladium-catalyzed aminosulfonylation.

Reaction 1 requires TPN,’ as shown, while the incorporation of COZ into oxalacetate during Reaction 2 is catalyzed by ATP in pigeon liver extracts (4, 5), although not in bacterial preparations (6). The relationship between the two reactions has been obscure, although some information is available. It has been reported that ATP has no effect on Reaction 1 (1) and that TPN cannot replace ATP in ...

Rapid development of the copper-catalyzed amination aryl halides in beginning 21st century, known as Renaissance Ullmann chemistry, laid foundations for use this method a powerful tool construction C(sp2)-N bond and became rival Buchwald–Hartwig reaction. Various applications approach are well-documented number comprehensive more specialized reviews, overview form personal account Cu-catalyzed ...

The unwinding reaction catalyzed by the Escherichia coli Rep protein is stimulated by a small 15 kDa protein called Rep helicase stimulatory protein (RHSP)(1). The RHSP-stimulated unwinding reaction catalyzed by Rep protein proceeded at a rapid rate after a time lag of 1-2 min at 37 degrees C. This time lag was eliminated by preincubating RHSP with the DNA substrate, indicating that stimulation...

Pickering emulsions, emulsions stabilized by solid emulsifiers, offer many opportunities for application in catalysis. Recent advances emulsifier design, type of conversions catalyzed and developments reaction engineering are discussed.

Thermodynamic calculations revealed that 10 to 100-fold increases in reaction rate are obtainable with added CO2 (0.1–1 MPa) for an acid-catalyzed reaction in hightemperature liquid water (HTW) that is first order in H concentration. These calculations suggest that CO2 is most effective as a rate-enhancing additive in HTW at lower temperatures (150–2008C). When compared with increased temperatu...

A polypeptide (Mr = 15,000) has been purified from Escherichia coli cell extracts that significantly stimulates the duplex DNA unwinding reaction catalyzed by E. coli Rep protein. The Rep helicase unwinding reaction was stimulated by as much as 20-fold, upon addition of the stimulatory protein, using either a 71-base pair or a 343-base pair partial duplex DNA molecule as a substrate. The purifi...