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CAS RN: 58713-03-4 | 產品號碼: A2555
5-Acetyl-1,3-dimethylbarbituric Acid
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| 包裝 | 價格 | 同一天 | 2-3个工作日 | 左側以上貨期 |
貨期資訊
|
|---|---|---|---|---|---|
| 5G |
NT$9,030
|
2 | 16 | 下單後約2週內可以出貨 |
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產品規格
| Appearance | White to Light yellow powder to crystalline |
| Purity(GC) | min. 98.0 % |
| Purity(Neutralization titration) | min. 98.0 % |
性質
| 熔點 | 99 °C |
GHS
| 圖形表示 |
|
| 信號詞 | Warning |
| 危險性說明 | H319 : Causes serious eye irritation. |
| 防範說明 | P264 : Wash skin thoroughly after handling. P280 : Wear eye protection/ face protection. 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. |
相關法規
運輸資料
| HS編碼* | 2933.54-000 |
Application
Selective Protection and Deprotection of Primary Amino Group Using 1,3-Dimethyl-5-acetylbarbituric Acid
Typical Procedure 1: Primary amino group selective protection using DAB
A solution of (1R,2R)-1,2-diphenylethanediamine (1.06 g, 5.0 mmol) and 1,3-dimethyl-5-acetylbarbituric acid (DAB) (1) (991 mg, 5 mmol) in anhydrous THF (15 mL) is stirred at room temperature under Ar. After stirring for 48 h, the reaction mixture is concentrated under reduced pressure, and the residue is purified by column chromatography using neutral silica gel (n-hexane:ethyl acetate=1:1) to afford the product 2 (1.92 g, 98% yield).
A solution of (1R,2R)-1,2-diphenylethanediamine (1.06 g, 5.0 mmol) and 1,3-dimethyl-5-acetylbarbituric acid (DAB) (1) (991 mg, 5 mmol) in anhydrous THF (15 mL) is stirred at room temperature under Ar. After stirring for 48 h, the reaction mixture is concentrated under reduced pressure, and the residue is purified by column chromatography using neutral silica gel (n-hexane:ethyl acetate=1:1) to afford the product 2 (1.92 g, 98% yield).
Typical Procedure 2: Primary amino group selective deprotection using DAB
A solution of 3 (196 mg, 0.396 mmol) and 2-aminoethanol (238 µL, 3.96 mmol) in anhydrous EtOH (3 mL) is stirred at 50 °C for 24 h under Ar. After removal of the solvent under reduced pressure, the residue is purified by column chromatography using neutral silica gel (n-hexane:ethyl acetate=1:1) to afford the product 4 (124 mg, 99% yield).
A solution of 3 (196 mg, 0.396 mmol) and 2-aminoethanol (238 µL, 3.96 mmol) in anhydrous EtOH (3 mL) is stirred at 50 °C for 24 h under Ar. After removal of the solvent under reduced pressure, the residue is purified by column chromatography using neutral silica gel (n-hexane:ethyl acetate=1:1) to afford the product 4 (124 mg, 99% yield).
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