Abstract
AbstractRuthenium catalysed denitrogenative transannulation of pyridotriazoles with naphthoquinones provided the transannulated benzo[f]pyrido[1,2‐a]indoles derivatives in good to excellent yields. While pyridotriazoles with indoles in presence of PivOH and oxone yield indolizino[3,2‐b]indoles under metal‐free conditions. Quinone annulation proceeds through ruthenium‐carbenoid intermediate while indole annulation may proceed via a diazo‐pyridinium intermediate. Control experiments suggest that both the transformations follow the ionic mechanism.magnified image
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