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CAS No. : | 38185-55-6 | MDL No. : | MFCD11110443 |
Formula : | C5H4BrClN2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | VXCUGLKQXLPHKI-UHFFFAOYSA-N |
M.W : | 207.46 | Pubchem ID : | 12370669 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H332-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium hydroxide; In tetrahydrofuran; diethylene glycol dimethyl ether; cyclohexane; ethylene glycol; ethyl acetate; | EXAMPLE 5 A mixture of 5 parts of 2-amino-3-chloro-5-bromopyridine, 20 parts of potassium hydroxide (85percent), 3 parts of diethylene glycol dimethyl ether, 0.3 part of copper-bronze and 40 parts of glycol is stirred under nitrogen for 7 hours at 170°-175° C. After cooling, the dark-coloured solution is neutralised with concentrated hydrochloric acid, saturated with sodium chloride and extracted twice in the warm state with ethyl acetate/tetrahydrofuran (9:1). The organic layer is extracted by shaking with a saturated sodium chloride solution; the ethyl acetate phase is then filtered through Hyflo, dried with magnesium sulphate and purified with active charcoal. The clear yellow solution is concentrated almost to dryness and chromatographed through a short silica-gel column with ethyl acetate/cyclohexane (2:1). The yield is 2 parts of 2-amino-3-hydroxy-5-bromopyridine, m.p. 204°-207° C. (44.1percent of theory). |
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