Water → HCID 89666839, compound

Participants

Reaction Conditions

Reaction Steps

Water (6 ml) and lithium hydroxide monohydrate (640 mg) were added to a THF (19 ml) solution containing ethyl 3-(difluoromethoxy)-5-nitro-1H-indazol-1-carboxylate (1.14 g) obtained in the 1st step, followed by reflux at 80° C. for 3 hours. THF was distilled away under reduced pressure and a saturated ammonium chloride aqueous solution was added. An insoluble precipitate was removed by filtration. The obtained residue was washed with water, dissolved in ethyl acetate, and dried over anhydrous sodium sulfate. The solvent was distilled away under reduced pressure. A yellow solid of 3-(difluoromethoxy)-5-nitro-1H-indazole (921 mg) was thus obtained.

Provenance & Evidence