Gold(III) complexes are emerging as promising phosphorescent emitters for high-efficiency organic light-emitting diodes (OLEDs). However, despite recent advances in the coordination and organometallic chemistry of gold, only few compounds have been successful in high-performance devices. Here, we disclose the synthesis of a new phosphorescent 3-(N C C ) − aminophenylalkynyl − N, N − bisf luorenyl−Au(III)complexwhichexhibitsacurrentef f iciency(CE)of 56.4cdA1andanexternalquantumef f iciency(ex alkynecompoundswithremarkableelectroluminescentperf ormancef orpotentialapplicationinhighlyef f icientOLEDs.

The development of a general, mild, and functional-group-tolerant direct functionalization of N-heteroarenes by C–H functionalization with N-protected amines, including azetidines under Minisci-mediated photoredox conditions, is reported. A broad scope of substituted azetidines, including spirocyclic derivatives, and heterocycles were explored. This reaction enables the production of sp3-rich complex druglike structures in one step from unactivated feedstock amines and heterocycles.

Efficient OLED devices have been fabricatedu sing organometallic complexes of platinum group metals. Still, the high materialc ost and low stabilityr epresent central challenges for their application in commercial display technologies. Based on its innate stability,g old(III) complexes are emerging as promising candidates for high-performance OLEDs. Here, as eries of alkynyl-, N-heterocyclic carbene (NHC)-and aryl-gold(III) complexes stabilized by a k 3-(N^C^C) template have been prepared and their photophysical properties have been characterized in detail. These com-poundsexhibit good photoluminescence quantum efficiency (h PL)o fu pt o3 3%.T he PL emission can be tuned from skyblue to yellowish green colors by variations on both the ancillary ligandsa sw ell as on the pincer template. Further,s olution-processable OLED devices based on some of these complexes display remarkable emissive properties (h CE 46.6 cd.A À1 and h ext 14.0 %), thus showcasing the potential of these motifs for the low-cost fabrication of display and illuminationtechnologies.

An efficient access to highly functionalized monofluorocyclopropanes is described. The developed methodology allowed straightforward access to a large panel of polysubstituted fluorinated cyclopropanes in good to excellent yields and good diastereoselectivities. The Rh-catalyzed cyclopropanation proved to be efficient on several fluorinated olefins and several diazo compounds. This method represents the first general route to complex fluorinated cyclopropanes.

Gold(III) carboxylate species,s tabilized by a k 3 -(N^C^C) ligand template,a re presented herein. A h 1 -Au III -C(O)-OH species has been characterized under cryogenic conditions as ar esult of the nucleophilic attacko fa n ammonium hydroxide onto ad inuclear m-CO 2 -k 3 -(N^C^C)Au III precursor.T hermal decomposition for these species proceeds by an unusual decarbonylation process,i n contrast to typical decarboxylation pathways observed in related metallocarboxylic acids.

Pyridine and phosphine directing groups promote the C–C activation of biphenylene by readily available gold(i) halides rendering a new entry to (N^C^C)- and (P^C)-gold(iii) species.

Gold(III) carboxylate species, stabilized by a κ3‐(N^C^C) ligand template, are presented herein. A η1‐AuIII‐C(O)‐OH species has been characterized under cryogenic conditions as a result of the nucleophilic attack of an ammonium hydroxide onto a dinuclear μ‐CO2‐κ3‐(N^C^C)AuIII precursor. Thermal decomposition for these species proceeds by an unusual decarbonylation process, in contrast to typical decarboxylation pathways observed in related metallocarboxylic acids.

A highly diastereoselective organocatalyzed domino vinylogous sulfa‐Michael‐aldol‐cyclocondensation (VMAC) reaction has been developed using alkylidene Meldrum's acid as dienes highlighting two vinylogous steps, an unprecedented sulfa‐1,6‐conjugate addition and a diastereoselective aldol reaction triggering a formal (4+2) cycloaddition. This work opens a new route towards bio‐relevant and original tricyclic thiochroman derivatives.