The application of natural eutectic solvent (NDDES) in organic synthesis has received more and more attention. In this work, a green protocol for one-pot synthesis of spiro[indoline-3,4′-pyrazolo[3,4-b]pyridines] via three-component reactions of 1H-pyrazol-5-amin, isatin and enolizable CH activated compound is achieved by the combination of microwave irradiation with choline chloride and lactic acid based NDDES. This novel method is clean, cheap, simple, high yield, chromatography-free and scalable. The use of choline chloride and lactic acid as a biodegradable, recycled and reusable media meets most of the criteria to be considered as a sustainable and environmentally benign process.

天然共晶溶剂（NDDES）在有机合成中的应用受到越来越多的关注。在这项工作中，通过1 H-吡唑-5-氨基，靛红和烯醇化的三组分反应，一锅法合成螺[吲哚啉-3,4'-吡唑并[3,4- b ]吡啶]的绿色方案通过结合氯化胆碱和乳酸的NDDES进行微波辐射，可以实现C H活化的化合物。这种新颖的方法清洁，便宜，简单，产率高，无色谱且可扩展。氯化胆碱和乳酸作为可生物降解，可循环使用和可重复使用的介质的使用符合大多数被认为是可持续的和对环境有益的过程的标准。