A novel visible-light-catalyzed tandem radical addition/ 1,5-hydrogen atom transfer/cyclization cascade of 2-alkynylarylethers with sulfonyl chlorides in 2-methyltetrahydrofuran was developed under photocatalyst-and additive-free conditions. This reaction relies on unique energy transfer and solvent-radical relay strategies to generate sulfonyl radicals for the preparation of a series of sulfonylfunctionalized dihydrobenzofurans in moderate to high yields catalyzed by visible light or solar radiation.

The multicomponent cascade reaction provides an efficient paradigm for the preparation of complex compounds in synthetic chemistry. Herein, we describe a copper-catalyzed multicomponent cascade of vinyl azides, oxime esters with...

Copper-catalyzed cyclization of alkynes has played a significant role in modern catalytic chemistry. However, the selective cyclization in this transformation is extremely limited by the uncontrolled reactivity of the vinyl-CuII...

A novel cyclization/hydrolysis of 1,5-enenitriles for the synthesis of valuable pyrrolidine-2,4-diones in aqueous phase using I2 as the catalyst and tert-butyl hydroperoxide (TBHP) as the oxidant is reported. In the...