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CAS RN: 1547-87-1 | 產品號碼: T3262
2,2,2-Trifluoro-N,N-dimethylacetamide
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產品規格
| Appearance | Colorless to Almost colorless clear liquid |
| Purity(GC) | min. 98.0 % |
性質
| 沸點 | 136 °C |
| flp | 37 °C |
| 比重 | 1.26 |
| 折射率 | 1.36 |
GHS
| 圖形表示 |
|
| 信號詞 | Warning |
| 危險性說明 | H315 : Causes skin irritation. H319 : Causes serious eye irritation. H226 : Flammable liquid and vapor. |
| 防範說明 | P501 : Dispose of contents/ container to an approved waste disposal plant. P240 : Ground/bond container and receiving equipment. P210 : Keep away from heat/sparks/open flames/hot surfaces. No smoking. P233 : Keep container tightly closed. P243 : Take precautionary measures against static discharge. P241 : Use explosion-proof electrical/ ventilating/ lighting/ equipment. P242 : Use only non-sparking tools. P264 : Wash skin thoroughly after handling. 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. 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. P303 + P361 + P353 : IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. P332 + P313 : If skin irritation occurs: Get medical advice/ attention. P403 + P235 : Store in a well-ventilated place. Keep cool. |
相關法規
運輸資料
| UN編號 | UN1993 |
| 類別 | 3 |
| 包裝類別 | III |
| HS編碼* | 2924.19-000 |
Application
Nucleophilic trifluoroacetylation for aromatic rings
2-(1-(tert-Butyldimethylsilyloxy)-7-phenylheptyl)oxazole (1 equiv) is dissolved in anhydrous THF (8 mL / 0.268 mmol), cooled to -78 °C and tert-BuLi (1.7 M in pentane, 1.3 equiv) is added dropwise under Ar. The reaction mixture is stirred for 1 h at -40 °C, cooled to -78 °C and N,N-dimethyltrifluoroacetamide (2 equiv) is added. The reaction mixture is warmed to room temperature, followed by the addition of water (3 mL) and aqueous 2M HCl (2 mL). The mixture is extracted with EtOAc, washed with saturated aqueous NaCl and dried over Na2SO4. Evaporation in vacuo yields the crude product which is purified by flash chromatography (SiO2, EtOAc/hexanes) yields the trifluoroacetylated compound (58% yield).
References
- Delineation of a Fundamental α -Ketoheterocycle Substituent Effect for Use in the Design of Enzyme Inhibitors
考研文獻
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