Hydrochloric Acid → HCID 23463333, compound

Participants

Reaction Steps

0.71 Mole (169 g) of 1-(2',2',2'-trifluoroethyl)-3-carbethoxy-2-pyrazolin-5-one were stirred for 8 hours in concentrated ammonium hydroxide and left standing afterwards for 5 days in a sealed recipient at room temperature. After filtration the filtrate obtained was poured out on ice and acidified with hydrochloric acid. As soon as the product had crystallized out completely, it was filtered and washed with water.

Provenance & Evidence