ChemicalBook CAS DataBase List Cyclopentene

Cyclopentene synthesis

9synthesis methods

Product Name:Cyclopentene
CAS Number:142-29-0
Molecular formula:C5H8
Molecular Weight:68.12

Cyclopentene is present in coal tar, cigarette smoke, and automobile emissions. It is also detected in air close to forests and as a decomposition product of polypropylene. It is used as a raw material in chemical synthesis.

1003-03-8 Synthesis

1003-03-8
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$10.00/1g

142-29-0
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$11.00/25mL

Yield:142-29-0 92%

Reaction Conditions:

with nickel(II) oxide;1-methyl-2-nitrobenzene;oxalic acid at 280 - 310; for 3.16667 h;Temperature;

Steps:

1 Synthesis of Cyclopentene as Intermediate
In the tubular type reaction vessel by adding nickel oxide 1.56mol, cyclopentamine (2) 1.3mol, the mass fraction is 65%1-nitro toluene solution (3) 1.9mol, the mass fraction is 35% oxalic acid 300 ml, increasing the reaction temperature to 280 °C, reaction 120 min, then raise the temperature to 310 °C, to continue reaction 70 min, after the thermal cracking reaction, reduce the reactor temperature to 25 °C, steam condensing, separating an aqueous layer, using ammonium bromide solution to wash oil, the mass fraction of 75% xylene washing, dehydration of phosphorus pentoxide, in the mass fraction is 95% recrystallization acetamide, to obtain crystal cyclopentene 81.33g, yield 92%.

References:

Chengdu qianyu Longhua Petroleum Engineering Consulting Co. Ltd.;Guan, Genan CN105503494, 2016, A Location in patent:Paragraph 0015-0016

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