3-HYDROXY-4-NITRO (1H)INDAZOLE synthesis
- Product Name:3-HYDROXY-4-NITRO (1H)INDAZOLE
- CAS Number:7384-16-9
- Molecular formula:C7H5N3O3
- Molecular Weight:179.13
50573-74-5
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Yield:7384-16-9 35%
Reaction Conditions:
Stage #1: 6-nitroanthranilic acidwith hydrogenchloride;sodium nitrite in water at 20; for 1 h;
Stage #2: with sulfur dioxide in water; for 1 h;Heating / reflux;
References:
WO2006/21544,2006,A1 Location in patent:Page/Page column 32