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CAS No. : | 144584-66-7 | MDL No. : | MFCD01631385 |
Formula : | C7H3BrF2O2 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | LSZYHXNOLVSZHH-UHFFFAOYSA-N |
M.W : | 237.00 | Pubchem ID : | 2773297 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H315-H319-H335 | Packing Group: | |
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 n-butyllithium; bromine; In tetrahydrofuran; hexane; water; | STR15 To 15.8 g (0.1 mol) of <strong>[1583-59-1]2,2-difluorobenzodioxole</strong> (compare e.g. DE-OS (German Published Specification) 19 21 741) in 80 ml of absolute tetrahydrofuran are added dropwise under a dry nitrogen atmosphere at -78 C. within 1 hour with stirring 45 ml (0.11 mol) of n-butyllithium (2.5 molar in n-hexane), and after stirring for 1 hour at -78 C. 16 g (0.1 mol) of bromine are then added dropwise with stirring at -78 C. The mixture is stirred for a further 90 minutes at -78 C. then allowed to come to room temperature, and is hydrolyzed with 75 ml of 10 per cent hydrochloric acid. For work-up the organic phase is separated off, washed with 1 normal hydrochloric acid, dried over sodium sulphate, concentrated in vacuo and the residue is distilled in a water pump vacuum. 11.3 g (46% of theory) of 4-bromo-<strong>[1583-59-1]2,2-difluorobenzodioxole</strong> are obtained of boiling point 74 C. to 75 C. at 20 mbar. |
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