Various oxindoles were efficiently synthesized via Fe‐mediated hydrometallation‐cyclization of N ‐arylacrylamides. The reactions were found to proceed in good yields in the presence of FeCl 3 and NaBH 4 in 1,2‐dimethoxyethane at 70 °C in a flask open to the air.
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Gui et al. (2015) studied this question.
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