Synthesis of Indoles from 2-Vinylanilines with PIFA or TFA and Quinones

The cyclizations involved in the synthesis of different indoles from 2-vinylanilines with PIFA {[bis(trifluoroacetoxy)iodo]benzene} and quinones have been developed under mild conditions. Various substituents on 2-vinylanilines induced good compatibility and gave the desired products in moderate to good yields.