Maximum quantity allowed is 999
CAS RN: 128-08-5 | 产品编码: B0656
N-Bromosuccinimide
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Appearance | White to Orange to Green powder to crystal |
Purity(Iodometric Titration) | min. 98.0 % |
熔点 | 176 °C(dec.) |
沸点 | 339 °C |
水溶性 | 微溶 |
在水中的溶解度 | 14.7 g/l 25 °C |
溶解性(可溶于) | 丙酮 |
象形图 | |
信号词 | 危险 |
危险性说明 | H302 : 吞咽有害。 H314 : 造成严重皮肤灼伤和眼损伤。 H290 : 可能腐蚀金属。 |
防范说明 | P501 : 将内装物/容器送到批准的废物处理厂处理。 P260 : 不要吸入粉尘或烟雾。 P270 : 使用本产品时不要进食、饮水或吸烟。 P234 : 只能在原容器中存放。 P264 : 作业后彻底清洗皮肤。 P280 : 戴防护手套/穿防护服/戴防护眼罩/戴防护面具。 P390 : 吸收溢出物,防止材料损坏。 P303 + P361 + P353 : 如皮肤(或头发)沾染:立即脱掉所有沾污的衣物。用水清洗皮肤/淋浴。 P301 + P330 + P331 : 如误吞咽:漱口。不要诱导呕吐。 P363 : 沾染的衣服清洗后方可重新使用。 P301 + P312 + P330 : 如误吞咽:如感觉不适,呼叫急救中心/医生。漱口。 P304 + P340 + P310 : 如误吸入:将人转移到空气新鲜处,保持呼吸舒适体位。立即呼叫急救中心/医生。 P305 + P351 + P338 + P310 : 如进入眼睛:用水小心冲洗几分钟。如戴隐形眼镜并可方便地取出,取出隐形眼镜。继续冲洗。立即呼叫急救中心/医生。 P406 : 贮存于抗腐蚀/带抗腐蚀衬里的容器中。 P405 : 存放处须加锁。 |
UN编号 | UN3261 |
类别 | 8 |
包装类别 | III |
监管条件代码(*) |
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Used Chemicals
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Procedure
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A solution of 2-methylbenzo[b]thiophene (500 mg, 3.4 mmol) in acetonitrile (5 mL) was stirred under nitrogen at 0 ˚C. Then NBS (630 mg, 3.5 mmol) was added the solution. The ice bath was removed and the mixture was stirred at room temperature for 30 min. The reaction mixture was quenched with water and extracted with dichloromethane. The organic layer was dried over anhydrous sodium sulfate and filtered. The solvent was removed under reduced pressure and the crude was purified by silica gel column chromatography (hexane, Rf = 0.65) to give 3-bromo-2-methylbenzo[b]thiophene as a white solid (759 mg, 99% yield).
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Experimenter’s Comments
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The reaction mixture was monitored by TLC (hexane, Rf = 0.65).
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Analytical Data
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3-bromo-2-methylbenzo[b]thiophene
1H NMR (270 MHz, CDCl3); δ 7.70-7.75 (m, 2H), 7.30-7.44 (m, 2H), 2.56 (s, 3H).
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Lead Reference
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- Reactive ligand influence on initiation in phenylene catalyst-transfer polymerization
To a vial, Piv-protected amine (1 eq.), AgNO3 (4 eq.), (NH4)2S2O8 (4 eq.), and NCS or NBS (4 eq.) is added and dissolved in 1:9 acetone:water (0.2 M). The resulting mixture is stirred at room temperature. After 30 minutes, the reaction mixture is partitioned between EtOAc and H2O and separated. The aqueous layer is extracted with EtOAc in triplicate and the combined organic layers concentrated in vacuo. The crude mixture is then purified over silica column eluting with an EtOAc:Hex. Mixture to afford the desired haloamine product.
References
- Deconstructive diversification of cyclic amines
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