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ChemicalBook CAS DataBase List 5-Bromo-1-pentene
1119-51-3

5-Bromo-1-pentene synthesis

13synthesis methods
1,5-Dibromopentane (100 Kg), N, N-dimethylformamide (100 Kg), and hexamethylphosphoramide (6.2 Kg) were stirred and mixed, and then heated in an oil bath at 140°C for 4 h. Atmospheric distillation collects the fractions, and the collected fractions are washed twice with 100 Kg brine. The organic liquid is distilled to obtain product 5-Bromo-1-pentene.
5-Bromo-1-pentene
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Yield:1119-51-3 80.1%

Reaction Conditions:

with N,N,N,N,N,N-hexamethylphosphoric triamide in N,N-dimethyl-formamide at 140; for 4 h;Large scale;Time;Temperature;Reagent/catalyst;

Steps:

1-4 Example 2
1,5-dibromopentane 100KG, N,N-dimethylformamide 100KG, hexamethylphosphoric triamide 6.2KG, stir and mix, then heat in oil bath at 140 for 4h, collect fractions by atmospheric distillation, collect fractions After washing twice with 100KG brine, the upper organic liquid was rectified to obtain 52.0KG, the yield was 80.1%, and the content: 99%.

References:

Pulasi Science And Technology (Shanghai) Co., Ltd.;Lu Dianyun;Li Jing;Cai Weibing CN108046980, 2020, B Location in patent:Paragraph 0021; 0031-0042

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