Cyclization to Carbon-Heteroatom Double Bonds

Cyclizations to sulfones which lead to a homolytic substitution at sulfur have been employed for the preparation of cyclic sulfinamides [59]. 

In some recently reported cyclization reactions, the radical undergoing the cyclization step is not an aryl radical itself, but it is generated by either aryl radical-induced fragmentation [60-62] or hydrogen abstraction [63-65]. By cyclizations on heteroatoms, benzoselenophenes and benzotellurophenes are also available [66-68]. 

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