Various 1-substituted 3-dimethylaminoindolin-2-ones (III) have been prepared by the reductive amination of the appropriate indole-2,3-diones (I). Catalytic reduction of the Schiff bases (IV)(3-alkyliminoindolin-2-ones) to give 3-alkylaminoindolin-2-ones (V) is also described.
D. Waite, J. Chem. Soc. C, 1970, 550 DOI: 10.1039/J39700000550
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