The selective condensation of pyrazolones with isatins using water as the reaction medium is presented. This strategy provides an environmentally benign synthetic route to synthesize various potentially bioactive pyrazolone substituted oxindoles.

中文翻译：

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吡唑啉酮在水性介质中选择性缩合为靛红

提出了以水为反应介质的吡唑啉酮与靛红的选择性缩合反应。该策略提供了一种环境友好的合成途径，可以合成各种可能具有生物活性的吡唑啉酮取代的羟吲哚。