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CAS RN: 153254-09-2 | 產品號碼: B3022
2,4-Bis(trifluoromethyl)phenylboronic Acid (contains varying amounts of Anhydride)
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* TCI會時常優化儲存條件,儲存溫度請以在線目錄為準，敬請留意。
| 產品號碼 | B3022 |
| 分子式 / 分子量 | C__8H__5BF__6O__2 = 257.93 |
| 外觀與形狀（20°C） | Solid |
| 儲存條件 | Room Temperature (Recommended in a cool and dark place, <15°C) |
| 包裝和容器 | 1G-Glass Bottle with Plastic Insert （閲覽圖片） |
| CAS RN | 153254-09-2 |
| Reaxys-RN | 10175108 |
| PubChem Substance ID | 87559527 |
| MDL編號 | MFCD01631349 |
產品規格
| Appearance | White to Light yellow powder to crystal |
| Purity(Neutralization titration) | 97.0 to 108.0 % |
性質
| 溶解性（可溶於） | Methanol |
GHS
| 圖形表示 |
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| 信號詞 | Warning |
| 危險性說明 | H315 : Causes skin irritation. H319 : Causes serious eye irritation. |
| 防範說明 | P264 : Wash skin thoroughly after handling. P280 : Wear protective gloves/ eye protection/ face protection. P302 + P352 : IF ON SKIN: Wash with plenty of water. P337 + P313 : If eye irritation persists: Get medical advice/ attention. P305 + P351 + P338 : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P362 + P364 : Take off contaminated clothing and wash it before reuse. P332 + P313 : If skin irritation occurs: Get medical advice/ attention. |
相關法規
運輸資料
| HS編碼* | 2931.90-000 |
Application
TCI Practical Example: Condensation Reaction Utilizing the Boronic Acid Catalyst
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Used Chemicals
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Procedure
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To a solution of benzoic acid (122 mg, 1.0 mmol) and benzylamine (107 mg, 1.0 mmol) in fluorobenzene (5 mL, 0.2 mol/L) was added molecular sieves 3A (2 g) at room temperature. After that 2,4-bis(trifluoromethyl)phenylboronic acid (13 mg, 0.05 mmol) was added to the reaction mixture and stirred at reflux temperature for 24 hours. The reaction mixture was filtered on celite pad and washed with EtOAc. The filtrate was washed with 2 mol/L HCl aq. (30 mL), saturated NaHCO3 aq. (30 mL), and brine (30 mL), dried over sodium sulfate and filtered. The solvent was removed under reduced pressure to give N-benzylbenzamide as a white solid (135 mg, 64%).
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Experimenter’s Comments
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The reaction mixture was monitored by LC.
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Analytical Data
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N-benzylbenzamide
1H NMR (270 MHz, DMSO-d6); δ 9.05 (brt, 1H, J = 5.4 Hz), 7.90 (dd, 1H, J = 7.3, 1.6 Hz), 7.56-7.44 (m, 3H), 7.36-7.32 (m, 4H), 7.25 (q, 1H, J = 7.3 Hz).
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Lead Reference
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- The ortho-substituent on 2,4-bis(trifluoromethyl)phenylboronic acid catalyzed dehydrative condensation between carboxylic acids and amines
考研文獻
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