Stable free radicals have potential application to a variety of problems.  Examples include the use of spin labels to probe polymer structures, catalysts for living radical polymerizations and components of metallo-organic polymers with unusual properties; however, their possible uses are limited by the small number of stable free radical families.  The most extensively studied systems are nitroxides, imino nitroxides, nitronyl and nitroxides, while semiquinones and verdazyls on the other hand, may also have potential applications.  One such example of interest is the stable free radical, 6-oxoverdazyl which may be synthesized with a number of functional groups. We report a new approach to synthesizing 6-oxoverdazyls using phthalimide as a protecting group for the bis-hydrazide intermediate.

Utilization of phthalimide protecting groups to synthesize 6-oxoverdazyls

243rd National Meeting (2012)

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