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CAS No. : | 105942-08-3 | MDL No. : | MFCD00143264 |
Formula : | C7H3BrFN | Boiling Point : | No data available |
Linear Structure Formula : | BrC6H3(F)(CN) | InChI Key : | HGXWRDPQFZKOLZ-UHFFFAOYSA-N |
M.W : | 200.01 | Pubchem ID : | 736029 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-H312-H315-H319-H332-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 |
---|---|---|
91% | Stage #1: With potassium carbonate In N,N-dimethyl-formamide; toluene for 4 h; Dean-Stark; Inert atmosphere; Reflux Stage #2: for 4 h; Reflux; Inert atmosphere |
In a three-neck flask equipped with a Dean-Stark trap, phenol (12.35 g, 131.25 mmol), K2CO3 (34.55 g, 250 mmol), N,N-dimethylformamide (125 mL) and toluene (125 mL) were charged, and refluxed in a nitrogen atmosphere for 4 hours to perform dehydration until no further water was formed from the reaction system. Thereafter, 100 mL of toluene was removed with the Dean-Stark trap. (0176) After returning to room temperature, 4-bromo-2-fluorobenzonitrile (25.0 g, 125 mmol) was added thereto, and the mixture was refluxed in a nitrogen atmosphere for 4 hours. After completing the reaction, the solution was diluted by adding toluene (200 mL) thereto, and then filtered with Celite. The solution was rinsed twice with water with a separating funnel, dried over anhydrous magnesium sulfate, and filtered. The product was purified by silica gel chromatography (mobile phase: toluene/ethyl acetate=9/1), and a specimen deposited through concentration of the solution was rinsed with 200 mL of hexane under application of ultrasonic wave for 5 minutes, and then filtered. The specimen was dried in vacuum (50° C. for 4 hours) to provide a white solid matter (yield amount: 31.2 g, yield: 91percent). The product was identified by 1H-NMR and ESI-MS. (0177) 1H NMR (500 MHz, CDCl3, δ): 6.97 (s, 1H), 7.11 (d, 2H), 7.25-7.31 (m, 2H), 7.42-7.48 (m, 2H), 7.51 (d, 1H) (0178) ESI-MS (m/z) (M+) calcd. 272.98, found 273.09. |
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