Dibenzo[b,d]furan-2-ylboronic acid
Dibenzo[b,d]furan-2-ylboronic acid
CAS: 402936-15-6
Molecular Formula: C25H17Br
Dibenzo[b,d]furan-2-ylboronic acid - Names and Identifiers
Dibenzo[b,d]furan-2-ylboronic acid - Physico-chemical Properties
| Molecular Formula | C25H17Br |
| Molar Mass | 212.01 |
| Density | 1.34 |
| Boling Point | 439℃ |
| Flash Point | 219℃ |
| pKa | 8.25±0.30(Predicted) |
| Storage Condition | under inert gas (nitrogen or Argon) at 2-8°C |
| Use | Dibenzofuran-2-boric acid is an important intermediate of new organic electroluminescent materials, organic synthesis intermediate and pharmaceutical intermediate, which can be used in laboratory research and development process and chemical production process. |
Dibenzo[b,d]furan-2-ylboronic acid - Preparation
Argon protection, add 2-bromodibenzofuran to the three-mouth flask, dry tetrahydrofuran solvent, stir, cool down with liquid nitrogen, and slowly drop the amount of n-butyl lithium. After dropping, the heat preservation reaction is 120min, the quantitative tributyl borate is slowly dropped, and the samples are taken every 20min after dropping the heat preservation reaction for 80min. When the content of 2-bromodibenzofuran is less than 5% and the main content is higher than 85%, the temperature is slowly raised to room temperature, and 200mL of dilute hydrochloric acid solution is slowly dropped. Filter, pour the filtrate into 20 times the volume of room temperature water, stir for 30min, a large amount of solid precipitation, filter, filter cake water wash to pH = 7. Vacuum drying for 24h. Toluene recrystallized to obtain white powder containing 14.6g of solid. HPLC>99%. The yield is 85.1%.
Last Update：2024-04-10 22:29:15
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