Metal‐Free Arylsulfonyl Radical Triggered Cascade Cyclization of Phenyl‐Linked 1,6‐Enynes: Synthesis of 2,3‐Dihydro‐1H‐indenes and 10a,11‐Dihydro‐10H‐benzo[b]fluorines.

Comprehensive Summary: Aryl sulfonyl radical triggered cascade cyclization of phenyl‐linked 1,6‐enynes for the synthesis of biologically important indenes containing alkenyl C—X bonds and 10a,11‐dihydro‐10H‐benzo[b]fluorines is presented. In these radical cascade processes, three new chemical bonds, including C—S, C—C, and C—X bonds, and three C—C bonds are formed in one step. The method is attractive and valuable due to its metal‐free, mild reaction conditions, broad substrate scope and good functional group tolerance. [ABSTRACT FROM AUTHOR]