Marginal ulcer perforation after one anastomosis gastric bypass: a case report.

One anastomosis gastric bypass (OAGB) has gained popularity and it is currently the third most frequently performed bariatric procedure worldwide. A marginal ulcer (MU) at the anastomosis site between the gastric pouch and the small intestine is a common complication of gastric bypass procedures but a rare complication of OAGB. Risk factors for MUs include cigarette smoking, alcohol misuse, and infection.

Solid state luminescence of phosphine-EWO ligands with fluorinated chalcone skeletons and their PdX complexes: metal-promoted phosphorescence enhancement.

Complexes -[PdXL] (X = Cl and Br), where is 1-(PR),2-(CHCH-C(O)Ph)-CF (R = Ph, Cy, and iPr), display phosphorescent emission in the solid state, whereas due to their substantially lower lifetimes, the free ligands exhibit fluorescent behaviour. Alternatively, structurally identical derivatives with halide replaced by CN or Pd replaced by Pt are non-emissive. DFT calculations explain this diverse behaviour, showing that the hybridization of orbitals of the MX moiety with those of the chalcone fragment of ligands is significant only for the LUMO of the emissive compounds.

Pd/Cu bimetallic catalysis to access highly fluorinated biaryls from aryl halides and fluorinated arenes.

An efficient Pd/Cu bimetallic cross-coupling catalysis of fluoroaryl halides and fluoroarenes is reported. generation of the Cu nucleophile by rate determining C-H activation of highly fluorinated aryls (≥4 F atoms) leads to high cross-coupling selectivity with little formation of homocoupling products.

Selective synthesis of fluorinated biaryls by [MCl(PhPEWO-F)] (M = Ni, Pd) catalysed Negishi cross-coupling.

Highly selective cross-couplings to polyfluorinated assymmetric biaryls, including the symmetric biaryl CF-CF, are achieved at relatively low temperature (80 °C) and in short times using [MCl(PhPEWO-F)] catalysts (M = Ni, Pd; PhPEWO-F = 1-(PPh), 2-(CHCH-C(O)Ph)-CF), ArI, and Zn(CF) as example of highly fluorinated nucleophile.

Easy wide scope access to luminescent fluorophosphoranes.

The almost quantitative synthesis of homologous luminescent fluorophosphoranes, by SNAr cyclization of (2'-F,2-(PR2)biaryl) phosphines made from easily accessible reagents, is reported and the DFT cyclization mechanism and alternative pathways to complete this isomerization are studied and discussed.

Ranking Ligands by Their Ability to Ease (CF)NiL → NiL + (CF) Coupling versus Hydrolysis: Outstanding Activity of PEWO Ligands.

The Ni literature complex -[Ni(CF)(THF)] is a synthon of -Ni(CF) that allows us to establish a protocol to measure and compare the ligand effect on the Ni → Ni reductive elimination step (coupling), often critical in catalytic processes. Several ligands of different types were submitted to this Ni-meter comparison: bipyridines, chelating diphosphines, monodentate phosphines, PR(biaryl) phosphines, and PEWO ligands (phosphines with one potentially chelate electron-withdrawing olefin). Extremely different CF-CF coupling rates, ranging from totally inactive (producing stable complexes at room temperature) to those inducing almost instantaneous coupling at 25 °C, were found for the different ligands tested.

Fluorinated vs Nonfluorinated PR(biaryl) Ligands and Their [AuCl(L)] Complexes: Synthesis, X-ray Structures, and Computational Study of Weak Interactions. Bond, No Bond, and Beyond.

Six fluorinated PR(biaryl) phosphines, , with R = Ph, Cy and biaryl = CH-CF, CF-CH, CF-CF, have been prepared. Their [AuCl()] complexes and H congeners with PhJohnPhos or CyJohnPhos have been studied in order to examine the interactions that bring the distal aryl close to the Au-Cl bond region. X-ray, DFT structure optimization, QTAIM, and NCI methods allow for some understanding of the forces involved.