Alkenylation of unactivated arenes and 6-arylpurines with terminal alkynes in high yields using Cp*Co(CO)I2 as catalyst under mild conditions is described. This method shows outstanding functional group compatibility and can be applied in the design of a mitochondria-targeted imaging dye.

A method for the electrochemical α‐sulfonylation of 1H‐indole with arenesulfinates was developed. A variety of indoles underwent this sulfonylation smoothly at room temperature under metal‐free and chemical‐oxidant‐free conditions to afford indolyl aryl sulfones in good to high yields. This reaction was found to tolerate a variety of functional groups, including halides and cyclopropyl, ether, ester, and aldehyde groups. It was applied to the synthesis of biologically active 5‐HT6 modulators.

Electrochemical intermolecular C–N formation for the synthesis of imidazopyridines.

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