3,5-DIBROMO-4-NITROPYRIDINE-N-OXIDE synthesis
- Product Name:3,5-DIBROMO-4-NITROPYRIDINE-N-OXIDE
- CAS Number:62516-09-0
- Molecular formula:C5H2Br2N2O3
- Molecular Weight:297.89
2402-99-5
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Yield:62516-09-0 58%
Reaction Conditions:
with sulfuric acid;nitric acid for 4 h;Reflux;
Steps:
A43.a
Cone. HNO3 (12.5 ml) was added to a sol. of 3,5-dibromo-pyridine JV-oxide (4.5 g, 17.8 mmol) in cone. H2SO4 (16 ml). The r.m. was refluxed for 4 h., then cooled and poured onto ice-water. The resulting precipitate was collected by filtration and dried. Yield: 3.1 g of intermediate 108 (58 %), which was used as such in the next step
References:
WO2010/89292,2010,A1 Location in patent:Page/Page column 95
625-92-3
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