Hydrochloric Acid → HCID 131712274, compound

Participants

Reaction Steps

A solution of 950 mg. of a mixture of dl-5-acetamido-4,5,6,7-tetrahydro-1H-indazole methane sulfonate and the 2H-tautomer methane sulfonate in 50 ml. of 6 N aqueous hydrochloric acid was refluxed under a nitrogen atmosphere for sixty minutes. The reaction mixture was cooled and the volatile constituents removed by evaporation in vacuo. The resulting residue was dissolved in ethanol, and the ethanol solution concentrated and cooled. dl-5-Amino-4,5,6,7-tetrahydro-1H-indazole dihydrochloride and dl-5-amino-4,5,6,7-tetrahydro-2H-indazole dihydrochloride formed in the above reaction crystallized and were separated by filtration; m.p.=260°-70° C.: yield=380 mg.

Provenance & Evidence