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CAS RN: 19172-47-5 | 产品编码: B1133
Lawesson's Reagent [Sulfurating Reagent]
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![Lawesson's Reagent [Sulfurating Reagent]](/_ui/responsive/theme-tci/images/missing_product_zoom.jpg "Lawesson's Reagent [Sulfurating Reagent]")
技术规格
| Appearance | White to Light yellow to Green powder to crystal |
| Purity(Iodometric Titration) | min. 93.0 % |
物性（参考值）
| 熔点 | 230 °C |
GHS
| 象形图 |
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| 信号词 | Warning |
| 危险性说明 | H302 + H332 : Harmful if swallowed or if inhaled. H315 : Causes skin irritation. H319 : Causes serious eye irritation. |
| 防范说明 | P501 : Dispose of contents/ container to an approved waste disposal plant. P261 : Avoid breathing dust/ fume/ gas/ mist/ vapors/ spray. P270 : Do not eat, drink or smoke when using this product. P271 : Use only outdoors or in a well-ventilated area. P264 : Wash skin thoroughly after handling. P280 : Wear protective gloves/ eye protection/ face protection. P302 + P352 : IF ON SKIN: Wash with plenty of water. 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. P332 + P313 : If skin irritation occurs: Get medical advice/ attention. P301 + P312 + P330 : IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. Rinse mouth. P304 + P340 + P312 : IF INHALED: Remove person to fresh air and keep comfortable for breathing. Call a POISON CENTER/doctor if you feel unwell. |
相关法规
运输信息
| HS编码* | 2931.49-900 |
应用
TCI Practical Example: Conversion of Carbonyl Group into Thiocarbonyl Group using Lawesson's Reagent
Used Chemicals
Procedure
To a solution of Lawesson’s reagent (2.38 g, 5.88 mmol) in dichloromethane (42 mL), 2-pyrrolidone (1.0 g, 11.75 mmol) in dichloromethane (42 mL) was added at room temperature under N2 atmosphere. After stirring the reaction solution for 2 hours, the solvent was removed under reduced pressure and the residue was purified by column chromatography (hexane:ethyl acetate = 9:1 - 6:4), giving pyrrolidine-2-thione as a white solid (0.79 g, 66%).
Experimenter’s Comments
The reaction was carried out in the fume hood due to Lawesson’s reagent’s bad smell.
The reaction mixture was monitored by TLC (hexane:ethyl acetate = 3:2, Rf = 0.28).
Analytical Data（pyrrolidine-2-thione）
1H NMR (400 MHz, CDCl3); δ 8.61 (brs, 1H), 3.61 (t, 2H, J = 8.0 Hz), 2.86 (t, 2H, J = 8.0 Hz), 2.20-2.12 (m, 2H).
13C NMR (101 MHz, CDCl3); δ 205.83, 49.66, 43.21, 22.91.
Lead Reference
- Ruthenium Catalyzed Synthesis of Enaminones
应用
Thiocarbonylation Reagent
References
- S. O. Lawesson, et al., Bull. Soc. Chim. Belg. 1978, 87, 223; 87, 229; 87, 293; 87, 299.
- R. Shabana, et al., Nouv. J. Chim. 1980, 4, 47.
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