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CAS No. : | 2613-34-5 | MDL No. : | MFCD00042200 |
Formula : | C6H4ClF2N | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | BNTNWQPIBPBJOO-UHFFFAOYSA-N |
M.W : | 163.55 | Pubchem ID : | 223089 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | |
GHS Pictogram: |
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* 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 N-Bromosuccinimide; In N-methyl-acetamide; hexane; water; | 18.9 g of N-bromosuccinimide was gradually added to a stirred solution of 17.4 g of <strong>[2613-34-5]3-chloro-2,4-difluoroaniline</strong> in 150 cm3 of dry dimethylformamide, cooled to a temperature in the region of -20 C., while this temperature was maintained. After stirring for 1 hour, the temperature was brought to the region of 20 C. and then the mixture was concentrated under reduced pressure (5 kPa), at a temperature in the region of 60 C. The residue obtained was supplemented with 400 cm3 of hexane and 200 cm3 of water. The mixture was stirred and the aqueous phase decanted off. The latter was extracted three times with successively 200, 200, and 100 cm3 of hexane. The extracts were combined, washed twice with 200 cm3 of water and twice with 200 cm3 of a saturated aqueous sodium chloride solution. After drying over magnesium sulphate, the organic solution was concentrated under reduced pressure (5 kPa) at a temperature in the region of 40 C. 19.2 g of 2-bromo-5-chloro-4,6-difluoroaniline was obtained in the form of a white solid, which melted at 62 C. 3-Chloro-2,4-difluoroaniline was prepared in the following manner: |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
57% | Comparative Example 3 Comparative Example 2 is repeated with 90 mg of catalyst and 14.8 g of 3-chloro-2,4-difluoronitrobenzene. The duration of the reaction is 400 min. The degree of conversion of the nitrated derivative is 100%. The 3-chloro-2,4-difluoroaniline yield is 57%. The remainder is still composed of the same by-products as in Comparative Examples 1 and 2. |