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This work describes a simple and efficient alternative method for obtaining 1,3,4-thiadialzolinic spirocompounds, combining the use of deep eutectic solvents (DES) with microwave irradiation in a one-pot process. A series of DES based on different acids was explored as a solvent in a three-component reaction including isatin derivatives (monomeric and dimeric), thiosemicarbazide, and acetic anhydride. Choline chloride and oxalic acid (1:1) showed better

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