Hydrochloric Acid → HCID 70539942, compound

Participants

Reaction Steps

A 2.0 g. amount of 2-(3-amino-5-phenyl-2-pyrazolin-1-yl)benzothiazole (Example 6) is dissolved in 20.0 ml. of N,N-dimethylformamide. The solution is acidified with 5N ethanolic hydrochloric acid. The solvent is removed in vacuo and the residue is crystallized from ether-methanol at 5° C. to give 2.0 g. of the product of the Example as green crystals, m.p. 275°-285° C.

Provenance & Evidence