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CAS No. : | 10344-42-0 | MDL No. : | MFCD13193322 |
Formula : | C4HBrCl2N2 | Boiling Point : | 341.8°C at 760 mmHg |
Linear Structure Formula : | - | InChI Key : | N/A |
M.W : | 227.87 g/mol | Pubchem ID : | 22030648 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
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Yield | Reaction Conditions | Operation in experiment |
---|---|---|
53% | With ammonia In ethanol at 20℃; Autoclave | 4-Bromo-3,6-dichloro-pyridazine (15.0 g, 65.8 mmol, prepared as described in WO 20081 16815) was dissolved in EtOH (73.1 mL) and introduced into an autoclave. At rt, gaseous NH3 (4.48 g, 263mmol) was introduced, and the reaction mixture was then stirred over night at reflux. The solution was concentrated in vacuo and the residue was triturated with EtOAc, the insoluble part was filtrated off, and the mother liquor evaporated to give the crude product. This was purified by Flash-Chromatography, eluting with cyclohexan /EtOAc 1/1 +2.5percent Et3N, to give the title compound as a pale brown solid (5.82g, 53percent). LCMS (method ZCQ13): Rt. 0.3min, 164/166/168 (M+H) |
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