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An organocatalytic enantioselective intermolecular oxidative dehydrogenative α-alkylation of aldehydes via benzylic C–H bond activation has been developed. The asymmetric reaction is smoothly fulfilled by using simple and green molecular oxygen as the oxidant. Two hydrogen dissociations make this transformation more environmentally benign because of high atom efficiency. [ABSTRACT FROM AUTHOR]

An Fe(OTf)3/TfOH cocatalyzed sp–sp3C–C bond formation through the coupling of benzylic alcohols with terminal alkynes in the absence of base has been developed. H2O is the sole by-product. [ABSTRACT FROM AUTHOR]

Aryl C–O and C–F can be transformed into C–Me via Ni-catalyzed coupling with MeMgBr under mild conditions. [ABSTRACT FROM AUTHOR]

As a widely used pressure calibrator, the structural phase transitions of bismuth from phase I, to phase II, to phase III, and then to phase V with increasing pressure at 300 K have been widely confirmed. However, there are different structural versions for phase III, most of which are determined by x-ray diffraction (XRD) technology. Using x-ray absorption fine structure (XAFS) measurements combined with ab initio calculations, we show that the proposed incommensurate composite structure of bismuth of the three configurations is the best option. An abnormal continuous increase of the nearest-neighbor distance of phase III with elevated pressure is also observed. The electronic structure transformation from semimetal to metal is responsible for the complex behavior of structure transformation. [ABSTRACT FROM AUTHOR]

The article presents a study about direct benzylic alkylation using Ni-catalyzed selective benzylic sp 3 C-O activation. This study focuses on the coupling of kumada as an aid in constructing C-C bonds using aryl halides and Grignard reagents. New developments are reported and comparisons are made to back up the findings.

An efficient protocol to synthesize unsymmetrical triphenylenes from electron-rich biphenyls and diaryliodonium salts via Cu catalysis was developed. A variety of unsymmetrical triphenylenes with diversified functional groups were synthesized according to this method. This transformation went through multiple direct C-H arylations from easily produced starting materials with high step-economy. The gram-scale synthesis of triphenylenes and their facile transformation into diverse functional organic molecules were illustrated. [ABSTRACT FROM AUTHOR]

Copper-catalyzed regioselective C-H sulfonyloxylation of electron-rich arenes with p-toluenesulfonic acid has been developed. Electron-rich benzene derivatives and heteroarenes can undergo this C-H sulfonyloxylation reaction to generate aryl tosylates. Furthermore, sulfonyloxylation of aryl(mesityl)iodonium sulfonates has also been investigated. Both aryl(mesityl)iodonium tosylates and triflates can react smoothly to get aryl sulfonates. The formed aryl sulfonates can be converted to phenols, as well as used as good partners of cross-coupling reactions. [ABSTRACT FROM AUTHOR]

A copper-catalyzed amidation of arylboronic acids with nitriles has been developed. This reaction provides an efficient and complementary methodology for the synthesis of various N-arylamides with a broad substrate scope. [ABSTRACT FROM AUTHOR]