Transition-Metal-Free Cascade Reaction of α-Halo-N-tosylhydrazones, Indoles and Arylboronic Acids.
2016
α-Halo-N-tosylhydrazones are employed as reagents for the formation of multiple carbon–carbon bonds in the three-component reactions. In this transformation, a strategy has been designed to generate the diazo intermediate by using a nucleophile to react with the azoalkene intermediate generated in situ from the α-halo-N-tosylhydrazone. The diazo intermediate thus generated further undergoes transition-metal-free C–C bond forming reaction with arylboronic acids.
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