Sulfuric Acid → HCID 20470040, compound

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Reaction Steps

A 2.0 g. amount of 3-amino-1-phenyl-2-pyrazoline (Example 1) is dissolved in 200 ml. of absolute ethanol, then 4.0 ml. of 10% w/w sulfuric acid solution is added with stirring. The reaction mixture is allowed to stand for 2 hours at room temperature then is filtered. The precipitate is refluxed with 100 ml. of acetone, cooled and filtered to give 1.40 g. of the desired product, m.p. 181°-183° C.

Provenance & Evidence