4-Diakylamino- and 4,5-bis(dialkylamino)-o-phenylenediamines are conveniently prepared by treatment of isobenzimidazole-2-spirocyclohexane with secondary amines, followed by reductive hydrolysis; introduction of other nucleophiles by this method and examples of using these novel phenylenediamines in heterocyclic syntheses are also described.
A. M. Jefferson and H. Suschitzky, J. Chem. Soc., Chem. Commun., 1977, 189 DOI: 10.1039/C39770000189
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