Herein, we first report an electrochemical methodology for the site-selective alkylation of azobenzenes with (thio)xanthenes in the absence of any transition metal catalyst or external oxidant. A variety of groups are compatible with this electrochemical alkylation, which furnishes the products in moderate to good yields.

The radical cascade cyclization of tethered alkenes has emerged as a remarkable and powerful shortcut to construct highly complex ring frameworks. However, it usually depends on aryl-tethered alkenes to provide...

A mild, visible-light-induced, regioselective cascade sulfonylation-cyclization of 1,5-dienes with sulfonyl chlorides through the intermolecular radical addition/cyclization of alkenes C(sp2)-H was developed. This procedure proceeds well and affords a mild and efficient route to a range of monosulfonylated pyrrolin-2-ones at room temperatures.

The electrochemical intramolecular cyclization of ketimines via N–H/N–H dehydrogenation coupling has been established for the construction of 1H-indazole scaffolds.