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CAS RN: 10513-45-8 | 产品编码: B0832
N-tert-Butyl-5-methylisoxazolium Perchlorate
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技术规格
| Appearance | White to Light yellow to Light red powder to crystal |
| Purity(HPLC) | min. 98.0 area% |
| Purity(with Total Nitrogen) | min. 98.0 % |
| Melting point | 119.0 to 122.0 °C |
物性（参考值）
| 熔点 | 119 °C |
GHS
| 象形图 |
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| 信号词 | Warning |
| 危险性说明 | H272 : May intensify fire; oxidizer. |
| 防范说明 | P501 : Dispose of contents/ container to an approved waste disposal plant. P220 : Keep/Store away from clothing/ combustible materials. P210 : Keep away from heat. P221 : Take any precaution to avoid mixing with combustibles. 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. |
相关法规
运输信息
| UN编号 | UN1479 |
| 类别 | 5.1 |
| 包装类别 | III |
| HS编码* | 2934.99-000 |
应用
Woodward’s Reagent L: A Condensing Agent
Experimental procedure1):
Under nitrogen, N-tert-butyl-5-methylisoxazolium perchlorate (240 mg, 1 mmol) is added to a mixture of 3-quinoline carboxylic acid (173 mg, 1 mmol) and triethylamine (140 µL, 1 mmol) in DMF (2 mL). The mixture is stirred at room temperature for 4 h and then poured on iced water (50 mL). The precipitate is collected, washed with water and dried. The intermediate ester 1 (131 mg, 0.44 mmol) is isolated in 44% yield as a yellow powder. Then the product (110 mg, 0.36 mmol) in DMF (3 mL) is added to a freshly prepared guanidine 2 (123 mg, 0.39 mmol) and the mixture is stirred at 140 °C for 2 h. The solvent is evaporated under reduced pressure. Water (10 mL) is added to the residue, and after 12 h at 4 °C, the precipitate formed is filtered, washed with water, and dried to obtain compound 3 in 85% yield.
Under nitrogen, N-tert-butyl-5-methylisoxazolium perchlorate (240 mg, 1 mmol) is added to a mixture of 3-quinoline carboxylic acid (173 mg, 1 mmol) and triethylamine (140 µL, 1 mmol) in DMF (2 mL). The mixture is stirred at room temperature for 4 h and then poured on iced water (50 mL). The precipitate is collected, washed with water and dried. The intermediate ester 1 (131 mg, 0.44 mmol) is isolated in 44% yield as a yellow powder. Then the product (110 mg, 0.36 mmol) in DMF (3 mL) is added to a freshly prepared guanidine 2 (123 mg, 0.39 mmol) and the mixture is stirred at 140 °C for 2 h. The solvent is evaporated under reduced pressure. Water (10 mL) is added to the residue, and after 12 h at 4 °C, the precipitate formed is filtered, washed with water, and dried to obtain compound 3 in 85% yield.
References
- 1) Chemical Delivery System of Metaiodobenzylguanidine (MIBG) to the Central Nervous System
- 2) Stable enol esters from N-tert-butyl-5-methylisoxazolium perchlorate
参考文献