Hydrochloric Acid → HCID 178473418, compound

Participants

Reaction Steps

Ethyl chloroformate (5 ml) was added to a pyridine (30 ml) solution containing 5-nitro-1H-indazol-3-ol (5.42 g) obtained in the 1st step, followed by stirring at room temperature for 1.5 hours. Water and concentrated hydrochloric acid (32 ml) were added dropwise to the reaction solution and a solid precipitate was collected by filtration. The obtained residue was washed with water. A brown solid of ethyl 3-hydroxy-5-nitro-1H-indazol-1-carboxylate (7.5 g) was thus obtained.

Provenance & Evidence