TEMPO-catalyzed oxidative homocoupling route to 3,2′-biindolin-2-ones via an indolin-3-one intermediate
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DOI: 10.1039/c6ra24834a
Abstract: A combinative C2-selective arylation, and C3-selective carbonylation of free indole derivatives, by means of TEMPO catalysis and a silver oxidant under non-directing group conditions, was successful demonstrated. This new methodology is both atom and step… read more here.
Keywords: biindolin; biindolin ones; homocoupling route; tempo catalyzed ... See more keywords
Metal-free hydrogen transfer reduction of 3-hydroxy-3-indolyloxindoles: a novel method for the synthesis of 3,3′-biindolin-2-ones
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DOI: 10.1039/c8nj01621f
Abstract: Herein, a new approach for the synthesis of 3,3′-biindolin-2-ones is reported. The transformation has been successfully performed following a one-step strategy starting from 3-hydroxy-3-indolyloxindoles. The reaction proceeds smoothly under mild conditions and is applicable to… read more here.
Keywords: hydroxy indolyloxindoles; synthesis biindolin; metal free; biindolin ones ... See more keywords