A clean synthesis of 3,3-bis(5-amino-1H-pyrazol-4-yl)indolin-2-one derivatives.

[摘要]：A clean and efficient method was reported for the condensation of 1,3-diphenyl-1H-pyrazol-5-amine with isatins in aq. media to afford the corresponding 3,3-bis(5-amino-1H-pyrazol-4-yl)indolin-2-one derivs. in good yields.

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