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A 4-neck round bottomed flask (500 mL) was charged with copper(I) chloride (2.51 g, 25.3 mmol), 1H-pyrazol-3-amine (15.8 g, 190 mmol), potassium carbonate (35.0 g, 253 mmol), and N,N-dimethylformamide (100 mL).

Muchas gracias