Hydrazo compounds indoles

Compound 59a reacted with arylhydrazines to give complex mixtures as shown in Scheme 53 (70G745). The reaction presumably goes via an electron transfer process in which the diazo compound serves as electron acceptor. Similar reactions leading to even more complex mixtures were also observed with hydroxylamine, hydrazo compounds, and conjugate indole derivatives (70G757). 

Via intermediates Quinolines and indoles from hydrazo compounds... 

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