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CAS RN: 553-26-4 | 产品编码: B0469
4,4'-Bipyridyl
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技术规格
| Appearance | White to Orange to Green powder to crystal |
| Purity(GC) | min. 98.0 % |
| Purity(Nonaqueous Titration) | min. 98.0 % |
| Solubility in Methanol | almost transparency |
| Melting point | 111.0 to 114.0 °C |
物性（参考值）
| 熔点 | 112 °C |
| 沸点 | 161 °C/20 mmHg |
| 最大吸收波长 | 300 nm (CH__3CN) |
| 溶解性（可溶于） | 甲醇 |
GHS
| 象形图 |
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| 信号词 | Danger |
| 危险性说明 | H301 + H311 : Toxic if swallowed or in contact with skin. H371 : May cause damage to organs. H373 : May cause damage to organs through prolonged or repeated exposure. |
| 防范说明 | P501 : Dispose of contents/ container to an approved waste disposal plant. P260 : Do not breathe dust/ fume/ gas/ mist/ vapors/ spray. P270 : Do not eat, drink or smoke when using this product. P264 : Wash skin thoroughly after handling. P280 : Wear protective gloves/ protective clothing. P308 + P311 : IF exposed or concerned: Call a POISON CENTER/doctor. P361 + P364 : Take off immediately all contaminated clothing and wash it before reuse. P301 + P310 + P330 : IF SWALLOWED: Immediately call a POISON CENTER/doctor. Rinse mouth. P302 + P352 + P312 : IF ON SKIN: Wash with plenty of water.Call a POISON CENTER/doctor if you feel unwell. P405 : Store locked up. |
相关法规
| RTECS# | DW1760000 |
运输信息
| UN编号 | UN2811 |
| 类别 | 6.1 |
| 包装类别 | III |
| HS编码* | 2933.39-000 |
应用
TCI Practical Example: Chemoselective Reduction of Nitro Group Using Diboronic Acid
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Used Chemicals
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Procedure
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To a solution of trans-4-nitrostilbene (1.13 g, 5.00 mmol), diboronic acid (1.34 g, 15.0 mmol, 3.0 eq.) in DMF (30 mL) was added 4,4’-bipyridyl (3.9 mg, 0.025 mmol, 0.50 mol%) at r.t. and the mixture was stirred at the same temperature for 1 hour. The reaction mixture was diluted by 1 mol/L NaHCO3 aq. (100 mL) and the resulting solid was filtered off. The solid was purified by column chromatography (dichloromethane：hexane = 0:1 - 4:1 on silica gel) to give trans-4-aminostilbene as a yellow solid (891 mg, y. 91%).
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Experimenter’s Comments
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The reaction mixture was monitored by UPLC.
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Analytical Data
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trans-4-Aminostilbene
1H NMR (270 MHz, CDCl3); δ 7.47 (d, 2H, J = 7.0 Hz), 7.38-7.30 (m, 4H), 7.21 (t, 1H, J = 7.0 Hz), 7.03 (d, 1H, J = 15 Hz), 6.91 (d, 1H, J = 15 Hz), 6.63 (d, 2H, J = 8.6 Hz), 3.75 (brs, 2H).
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Lead Reference
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- Metal-Free, Rapid, and Highly Chemoselective Reduction of Aromatic Nitro Compounds at Room Temperature
参考文献
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