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CAS RN: 54761-04-5 | 产品编码: T1610
Ytterbium(III) Trifluoromethanesulfonate
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| 规格 | 单价 | 同一天 | 2-3个工作日 | 数量 |
|---|---|---|---|---|
| 5G |
S$147.00
|
4 | ≥80 |
|
| 25G |
S$441.00
|
13 | 25 |
|
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技术规格
| Appearance | White to Almost white powder to crystal |
| Purity(Chelometric Titration) | min. 98.0 %(calcd.on anh.substance) |
| Water | max. 10.0 % |
物性（参考值）
GHS
| 象形图 |
|
| 信号词 | Danger |
| 危险性说明 | H314 : Causes severe skin burns and eye damage. |
| 防范说明 | P501 : Dispose of contents/ container to an approved waste disposal plant. P260 : Do not breathe dusts or mists. P264 : Wash skin thoroughly after handling. P280 : Wear protective gloves/ protective clothing/ eye protection/ face protection. P303 + P361 + P353 : IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. P301 + P330 + P331 : IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P363 : Wash contaminated clothing before reuse. P304 + P340 + P310 : IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/doctor. P305 + P351 + P338 + P310 : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER/doctor. P405 : Store locked up. |
相关法规
运输信息
| UN编号 | UN1759 |
| 类别 | 8 |
| 包装类别 | III |
| HS编码* | 2846.90-000 |
应用
Enantioselective Mannich Reaction of Malonates with N-tert-Butoxycarbonyl Imines
Typical Procedure:
A well-dried glass tube is charged with Yb(OTf)3 (30 mg, 0.048 mmol) and the ligand (44 mg, 0.096 mmol) under argon atmosphere. After dichloromethane (1.0 mL) is added to the mixture, it is stirred vigorously at room temperature for 1 h until the reaction become homogeneous. The imine (1 mmol) and dibenzylmalonate (neat, 0.312 g, 1.1 mmol) dissolved in dichloromethane are added to the solution of the complex under an argon atmosphere. After that methanol (1 mmol) is injected in one portion to the reaction mixture. After 12 h, the reaction mixture is purified by flash chromatography through a short column of silica gel using an eluting mixture of hexane / ethyl acetate solvent to obtain the corresponding products.
A well-dried glass tube is charged with Yb(OTf)3 (30 mg, 0.048 mmol) and the ligand (44 mg, 0.096 mmol) under argon atmosphere. After dichloromethane (1.0 mL) is added to the mixture, it is stirred vigorously at room temperature for 1 h until the reaction become homogeneous. The imine (1 mmol) and dibenzylmalonate (neat, 0.312 g, 1.1 mmol) dissolved in dichloromethane are added to the solution of the complex under an argon atmosphere. After that methanol (1 mmol) is injected in one portion to the reaction mixture. After 12 h, the reaction mixture is purified by flash chromatography through a short column of silica gel using an eluting mixture of hexane / ethyl acetate solvent to obtain the corresponding products.
References
应用
Stable Lewis Acid Catalyst in Aqueous Media
References
- S. Kobayashi, Chem. Lett. 1991, 20, 2187.
- S. Kobayashi, I. Hachiya, Tetrahedron Lett. 1992, 33, 1625 (for aldol reaction).
- S. Kobayashi, I. Hachiya, T. Takahori, M. Araki, H. Ishitani, Tetrahedron Lett. 1992, 33, 6815 (for Michael and Diels-Alder reaction).
参考文献
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