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| CAS号 : | 4701-17-1 |
精确质量 : | 189.90900 |
| 分子式 : | C5H3BrOS |
logP : | 2.32310 |
| 分子量 : | 191.04600 |
PSA : | 45.31000 |
5-溴噻吩-2-甲醛 | |
5-Bromo-2-thiophenecarboxaldehyde | |
4701-17-1 | |
C5H3BrOS | |
191.04600 | |
45.31000 | |
2.32310 | |
189.90900 |
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透明黄色至棕色液体在熔点后
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n20/D 1.637(lit.)
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210 °F
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0-6ºC
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104-6ºC
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1.607 g/mL at 25 °C(lit.)
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105-107 °C11 mm Hg(lit.)
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2934999090
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3
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R20/21/22; R36/37/38
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S36/37/39-S26-S22
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Xn
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品名, 成分含量, 用途 |
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2934999090. 其他杂环化合物. 增值税率:17.0%. 退税率:13.0%. 监管条件:无. 最惠国关税:6.5%. 普通关税:20.0% |
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2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
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2934999090. Other nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds. General tariff: |
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将95.5g(0.33mol)三溴氧磷加入盛有45g(0.32mol)N-甲基甲酰苯胺和32.6g(0.2mol)2-溴噻吩的反应瓶中(通风橱中进行)。此时发生剧烈反应,冷却,以降低溴化氢产生的速度。然后置于蒸汽浴上加热1h。冷却后,以乙酸钠的水溶液中和。水蒸气蒸馏,馏出物以乙醚萃取,乙醚萃取物用6mol/L盐酸及5%碳酸氢钠先后洗涤后,用无水硫酸钠干燥。蒸馏,得20.5g5-溴-2-噻吩甲醛,沸点80~83℃(267Pa)。 | |
用于有机合成 |
![[2,2’]-双噻吩-5,5‘-二甲醛](https://www.chemicalbook.com/CAS/GIF/32364-72-0.gif)
