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CAS RN: 24057-28-1 | 产品编码: P0942
Pyridinium p-Toluenesulfonate
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技术规格
| Appearance | White to Almost white powder to crystal |
| Purity(Neutralization titration) | min. 98.0 % |
| Melting point | 118.0 to 122.0 °C |
| Solubility in Water | almost transparency |
物性（参考值）
| 熔点 | 120 °C |
| 水溶性 | 可溶 |
| 溶解性（可溶于） | 乙醇, 氯仿, 二氯甲烷, 丙酮 |
GHS
| 信号词 | Warning |
| 危险性说明 | H320 : Causes eye irritation. |
| 防范说明 | P264 : Wash skin thoroughly after handling. 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. |
相关法规
运输信息
| HS编码* | 2933.31-000 |
应用
Application for Introduction of Protecting Groups Using PPTS as an Acid Catalyst
Typical procedure :PPTS catalyzed THP protection of (R)-(+)-glycidol
Pyridinium p-toluenesulfonate (PPTS) (1.00 g, 4.05 mmol) and 3,4-dihydro-2H-pyran (11.3 mL, 121.5 mmol) are added to a stirred solution of (R)-(+)-glycidol (6.00 g, 80.99 mmol) in dichloromethane (80 mL) at 0 °C under argon atmosphere. After 6 h, aqueous NaHCO3 solution (60 mL) is added and the layers are separated. The aqueous layer is extracted with dichloromethane (3x50 mL). Combined organic layer is dried over MgSO4, filtered, and concentrated in vacuo. The crude mixture is purified by column chromatography (EtOAc:hexane = 1:5) to give the desired product (9.22 g, 72%).
Pyridinium p-toluenesulfonate (PPTS) (1.00 g, 4.05 mmol) and 3,4-dihydro-2H-pyran (11.3 mL, 121.5 mmol) are added to a stirred solution of (R)-(+)-glycidol (6.00 g, 80.99 mmol) in dichloromethane (80 mL) at 0 °C under argon atmosphere. After 6 h, aqueous NaHCO3 solution (60 mL) is added and the layers are separated. The aqueous layer is extracted with dichloromethane (3x50 mL). Combined organic layer is dried over MgSO4, filtered, and concentrated in vacuo. The crude mixture is purified by column chromatography (EtOAc:hexane = 1:5) to give the desired product (9.22 g, 72%).
References
- A Facile Synthesis of (S)-Felodipine
应用
PPTS Catalyzed Hydrolysis of Dioxolane-type Acetals
Reference
- Pyridinium Tosylate, A Mild Catalyst for Formation and Cleavage of Dioxolane-type Acetals
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