Transition metal-free, Brønsted acid-catalysed hydroarylation of unactivated alkynes was achieved in a two-phase solvent system consisting of 1,1,1,3,3,3-hexafluoropropan-2-ol (HFIP) and cyclohexane.
A transition-metal-free radical carbonylation of activated alkylamines with thiophenols has been successfully developed. Various thioesters were selectively produced with moderate to good yields.
Here we report a
visible-light-promoted metal-free regioselective C3-H trifluoromehtylation
reaction that proceeds via radical mechanism and which supported by control
experiments. The combination of photoredox catalysis and hypervalent iodine
reagent provides a practical approach for the present trifluoromethylation
reaction and synthesis of a library of trifluoromethylated indazoles.
This review highlights recent advancements in defect engineering and characterization of both metal-free carbons and transition metal-based electrocatalysts.
A facile oxidative halogenation of α-oxo ketene dithioacetals is achieved by using a potassium halide and an oxidant combination under transition metal free conditions at ambient temperature.
Here, we provide an operationally simple protocol for the highly chemoselective deoxygenation of various functionalized N-heterocyclic N-oxides under visible light-mediated photoredox conditions with Na2-eosin Y as an organophotocatalyst.
Brønsted acid-catalysed hydroarylation of unactivated alkynes in a fluoroalcohol–hydrocarbon biphasic system: construction of phenanthrene frameworks
