1,3,5-Tribromobenzene synthesis
- Product Name:1,3,5-Tribromobenzene
- CAS Number:626-39-1
- Molecular formula:C6H3Br3
- Molecular Weight:314.8
Pour 10 mol of benzene into a 500 ml three-necked bottle, add 200 ml of trichloromethane and 0.4 g of iron powder, stirring to dissolve, ice bath until the system is about 0 ℃, protected from light, slowly add 35 mol of liquid bromine and 80 ml of tric
147-82-0
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626-39-1
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Yield:626-39-1 90%
Reaction Conditions:
with sulfuric acid;sodium nitrite in ethanol at 20;Reflux;
Steps:
1,3,5-Tribromobenzene (4)
To a stirred solution of compound 3 (9.90 g, 0.03 mol) in ethanol containing H2SO4 (3.0 g, 0.03 mol) at room temperature, NaNO2 (2.10 g, 0.03 mol) was added in 10 portions over a period of 1 h at room temperature. Then the reaction mixture was heated to reflux for several hours. The mixture was cooled to room temperature and the resulting precipitate was filtered and recrystallised from ethanol to give 4: Light brownish needles; yield 8.50 g, 90%; m.p. 119-121 °C (lit.18121.5-122.5 °C); 1H NMR (500 MHz, DMSO-d6) δ 7.61 (s, 3H); MS (m/z):316 [M + H]+.
References:
Wang, Qian;Yang, Jian;Zheng, Yang;Liao, Xiali [Journal of Chemical Research,2017,vol. 41,# 4,p. 193 - 194]
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