Facile synthesis of isatins by direct oxidation of indoles and 3-iodoindoles using NIS/IBX
2019
Abstract A facile one-pot access to a broad range of isatins by direct oxidation of indoles using NIS/IBX reagent in DMSO at 25 °C in very good isolated yields is reported. It is shown by mechanistic investigations that a number of substituted indoles react rapidly with NIS in DMSO to produce intermediary 3-iodoindoles, which undergo oxidation subsequently to isatins with IBX.
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