Acetic Acid → 1H-Indazole-5-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

To 867 mg of 1H-5-indazolecarbonitrile used in Production Example I-14-a were added 8 ml of glacial acetic acid, 2.5 ml of water and 2 ml of concentrated sulfuric acid, and the mixture was stirred at 110° C. for 10 hours. After standing to cool, the mixture was added with 50 ml of water, and the resulting crystals were collected by filtration and dried in vacuo, to give 911 mg of the title compound as white crystals.

Provenance & Evidence