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CAS No. : | 86-76-0 | MDL No. : | MFCD00092338 |
Formula : | C12H7BrO | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | CRJISNQTZDMKQD-UHFFFAOYSA-N |
M.W : | 247.09 | Pubchem ID : | 6856 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H319-H413 | 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 |
---|---|---|
50% | 2,8-dibromo-dibenzofuran (20). The procedure for the synthesis of 19 was followed (1 eq. bromine was used) to prepare 20 from 19 as white crystals in a 50percent yield. 1H NMR (400 MHz, CDCl3, 298 K): delta(ppm) 8.04-8.03 (d, J=2.00 Hz, 2H), 7.60-7.59 (d, J=2.00 Hz, 1H), 7.58-7.57 (d, J=2.00 Hz, 1H), 7.47 (s, 1H), 7.44 (s, 1H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
83% | With tetrakis(triphenylphosphine) palladium(0); tetrabutyl-ammonium chloride; potassium carbonate; In ethanol; water; toluene; at 78℃; for 10.0h;Inert atmosphere; | Intermediate IA (3.0g, 12.14mmol), intermediate IP-1 (3.11g, 16.18mmol), tetrakis (triphenylphosphine) palladium (0.70g, 0.61mmol), potassium carbonate (3.36g, 24.28mmol) , Tetrabutylammonium chloride (0.17g, 0.61mmol), toluene (30mL), ethanol (16mL) and deionized water (8mL) were added to the round bottom flask, heated to 78 C under nitrogen protection, and stirred for 10 hours; The reaction solution was cooled to room temperature, toluene (200 mL) was added for extraction, the organic phases were combined, dried over anhydrous magnesium sulfate, filtered, and the solvent was removed under reduced pressure; the resulting crude product was purified by silica gel column chromatography using n-heptane as the mobile phase, and then used The dichloromethane / ethyl acetate system was purified by recrystallization to obtain the intermediate IP-2 (4.22 g, yield 83% |