Abstract
A cascade reaction giving nitromethyl-substituted oxindole derivatives was developed. The reaction used NaNO2 as the nitro source and potassium peroxydisulfate as an oxidant. This reaction proceeded via a radical mechanism involving substitution–desulfonlylation–cyclization steps in one pot and afforded good yields under mild conditions without using toxic metal catalysts. The resultant nitromethyl-substituted oxindole derivatives are convenient and valuable structures for different derivative syntheses.
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