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2,3-二氟苯硼酸
2,3-二氟苯硼酸 · 2.3-二氟苯硼陂 · 2,3-二氟苯基硼酸 · 2,3-二氟苯硼酸,98% · 2,3-二氟苯硼酸 25G · 2,3-二氟苯硼酸 (含不同量的酸酐) · 2,3-二氟苯硼酸(含有数量不等的酸酐) · 2,3-二氟代苯硼酸(含有数量不等的酸酐)

标识与物理属性
| CAS No. | 121219-16-7 |
|---|---|
| 分子式 | C6H5BF2O2 |
| 平均分子量 | 157.91 g/mol |
| 单同位素质量 | 158.0350659 g/mol |
| SMILES | OB(O)c1cccc(F)c1F |
| InChIKey | SZYXKFKWFYUOGZ-UHFFFAOYSA-N |
| PubChem CID | 2734333 |
| EC No. | 601-759-6 |
| DTXSID | DTXSID90370224 |
| 中文名 | 2,3-二氟苯硼酸 |
化学与物理性质
| 极性表面积 | 40.5 |
|---|---|
| 氢键供体 | 2 |
| 氢键受体 | 4 |
| 可旋转键 | 1 |
| 重原子 | 11 |
| 形式电荷 | 0 |
| 复杂度 | 134 |
| 熔点 | 95 °C (dec.) (lit.) |
| 沸点 | 274.8±50.0 °C(Predicted) |
| 密度 | 1.35±0.1 g/cm3(Predicted) |
| 储存条件 | Keep in dark place,Sealed in dry,Room Temperature |
| 溶解性 | soluble in Methanol |
| pKa(酸度系数) | 7.29±0.58(Predicted) |
| 形态 | Crystalline Powder |
| 颜色 | White to light beige |
| BRN | 6594341 |
| InChI | InChI=1S/C6H5BF2O2/c8-5-3-1-2-4(6(5)9)7(10)11/h1-3,10-11H |
| InChIKey | SZYXKFKWFYUOGZ-UHFFFAOYSA-N |
| SMILES | B(C1=CC=CC(F)=C1F)(O)O |
| CAS 数据库 | 121219-16-7(CAS DataBase Reference) |
安全与法规
| GHS 分类 | WarningH302 (11.1%): Harmful if swallowed [Warning Acute toxicity, oral]H315 (88.9%): Causes skin irritation [Warning Skin corrosion/irritation]H319 (88.9%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]H335 (77.8%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposureRespiratory tract irritation]P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 9 reports by companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. |
|---|---|
| Hazard Classes and Categories | Acute Tox. 4 (11.1%)Skin Irrit. 2 (88.9%)Eye Irrit. 2A (88.9%)STOT SE 3 (77.8%)Skin Irrit. 2 (100%)Eye Irrit. 2 (100%)STOT SE 3 (100%) |
| 水危害等级(WGK) | 3 |
| 危险类别 | IRRITANTAcute Tox. 4 Oral |
| 储存类别 | 11 - Combustible Solids |
| 安全说明(S) | 37/39-26-36/37 |
| 海关编码 | 29163990 |
| 危险品标志 | Xn,Xi |
| 危险类别码(R) | 36/37/38-22 |
制备与合成方法
生产方法
以硼酸三正丙酯和1,2-二氟苯为原料合成2,3-二氟苯硼酸的一般步骤如下:在配备有机械搅拌器、氮气进出口、压力平衡滴液漏斗及温度计的1L三口烧瓶中,加入1,2-二氟苯(40g,0.35mol)和无水四氢呋喃(400ml)。通入氮气置换反应体系内的空气,并在整个反应过程中维持氮气的微弱流动。使用干冰/丙酮浴将反应混合物冷却至-78℃,随后通过滴液漏斗缓慢滴加2.5mol/L正丁基锂的己烷溶液(140ml,0.35mol),控制反应温度不超过-70℃。正丁基锂溶液滴加完毕后,继续在-78℃下搅拌反应混合物2小时。随后,逐滴加入硼酸三正丙酯(66g,0.35mol),同样保持反应温度低于-70℃。硼酸三正丙酯加毕后,撤去冷却浴,使反应混合物自然升温至室温,同时持续搅拌。反应完成后,减压蒸馏除去溶剂,得到粘稠液体残留物。将残留物酸化,随后蒸发生成的丙醇。过滤收集析出的固体产物,用己烷洗涤,并通过水重结晶纯化,最终得到白色结晶状2,3-二氟苯硼酸47g,收率为理论值的85%。参考文献:[1] Patent: US2013/20532, 2013, A1. Location in patent: Paragraph 0042[2] Journal of Materials Chemistry C, 2014, vol. 2, # 5, p. 891 - 900