110-21-4

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• Synthesis

  First, 200 mg of hydrazine sulfate was dissolved in 3 mL of 0.5 mol/L acetic acid aqueous solution. Potassium cyanate solution (275 mg of potassium cyanate dissolved in 0.93 mL of water) was slowly added dropwise to this solution. The mixture was stirred at room temperature for 4 hours. After the reaction was complete, the mixture was transferred to a 25 mL centrifuge tube. 2 mL of water was added to the centrifuge tube, and crystals formed. The precipitate was separated by centrifugation (5000 g, 5 min). The precipitate was washed twice, successively with 2 mL of anhydrous ethanol and ether, to obtain 150 mg of product. The reaction equation is as follows:

  

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