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CAS RN: 340-07-8 | 产品编码: T2087
1-(Trifluoroacetyl)piperidine
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技术规格
| Appearance | Colorless to Light yellow clear liquid |
| Purity(GC) | min. 98.0 % |
物性（参考值）
| 沸点 | 77 °C/15 mmHg |
| 闪点 | 76 °C |
| 比重 | 1.24 |
| 折射率 | 1.42 |
GHS
| 信号词 | Warning |
| 危险性说明 | H227 : Combustible liquid. |
| 防范说明 | P501 : Dispose of contents/ container to an approved waste disposal plant. P210 : Keep away from heat/sparks/open flames/hot surfaces. No smoking. P280 : Wear protective gloves/ eye protection/ face protection. P370 + P378 : In case of fire: Use dry sand, dry chemical or alcohol-resistant foam to extinguish. P403 + P235 : Store in a well-ventilated place. Keep cool. |
相关法规
运输信息
| HS编码* | 2933.39-000 |
应用
A Convenient Trifluoroacetylating Reagent
Typical Procedure:
4-Bromotoluene (9.45 g, 55.25 mmol) is dissolved in Et2O (280 mL) and cooled to -40 °C. n-Butyllithium (1.1 M in hexane, 40.5 mL, 60.74 mmol) is added dropwise, and the solution is warmed to 0 °C over a 2 h period. The solution is then cooled to -60 °C and a solution of 1-(trifluoroacetyl)piperidine (10.00 g 55.23 mmol) in dry Et2O (60 mL) is added in portions. The reaction is allowed to stir at -60 °C for 3 h and then warmed to room temperature. The solution is hydrolyzed with saturated NH4Cl (50 mL) and washed with NH4Cl (5 x 50 mL) and H2O (3 x 50 mL). The organic phase is dried over MgSO4, and the solvent is removed in vacuo. The remaining oil is purified by flash column chromatography eluting with hexane/CH2Cl2 (5:1, 4:1, and 3:1) to give a colorless oil (5.62 g, 54%).
4-Bromotoluene (9.45 g, 55.25 mmol) is dissolved in Et2O (280 mL) and cooled to -40 °C. n-Butyllithium (1.1 M in hexane, 40.5 mL, 60.74 mmol) is added dropwise, and the solution is warmed to 0 °C over a 2 h period. The solution is then cooled to -60 °C and a solution of 1-(trifluoroacetyl)piperidine (10.00 g 55.23 mmol) in dry Et2O (60 mL) is added in portions. The reaction is allowed to stir at -60 °C for 3 h and then warmed to room temperature. The solution is hydrolyzed with saturated NH4Cl (50 mL) and washed with NH4Cl (5 x 50 mL) and H2O (3 x 50 mL). The organic phase is dried over MgSO4, and the solvent is removed in vacuo. The remaining oil is purified by flash column chromatography eluting with hexane/CH2Cl2 (5:1, 4:1, and 3:1) to give a colorless oil (5.62 g, 54%).
References
- K. Strømgaard, D. R. Saito, H. Shindou, S. Ishii, T. Shimizu, K. Nakanishi, J. Med. Chem. 2002, 45, 4038.
- D. Riber, M. Venkataramana, S. Sanyal, T. Duvold, J. Med. Chem. 2006, 49, 1503.
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