4-bromocyclopentene

Base Information

• Chemical Name: 4-bromocyclopentene
• CAS No.: 1781-66-4
• Molecular Formula: C5H7 Br
• Molecular Weight: 147.015
• Mol file: 1781-66-4.mol

Synonyms:3-Cyclopenten-1-ylbromide; 4-Bromo-1-cyclopentene; 4-Bromocyclopentene; Cyclopent-3-enyl bromide;NSC 223057

Chemical Property of 4-bromocyclopentene

Chemical Property:

• Vapor Pressure: 6.77mmHg at 25°C
• Boiling Point: 143.2°C at 760 mmHg
• Flash Point: 37.2°C
• Density: 1.525g/cm³

Purity/Quality:

99% ^*data from raw suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

Technology Process of 4-bromocyclopentene

There total 3 articles about 4-bromocyclopentene which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield:

cyclopenta-1,3-diene (542-92-7,25568-84-7,7313-32-8) → Cyclopentyl bromide (137-43-9) + cyclopent-3-enyl bromide (1781-66-4)

Guidance literature:

cyclopenta-1,3-diene; With borane-THF; In tetrahydrofuran; at 20 ℃; for 2h;

With sodium hydroxide; dihydrogen peroxide; In diethyl ether; for 0.5h;

With phosphorus tribromide; In pentane; for 12h; Title compound not separated from byproducts; Heating;

DOI:10.1016/S0957-4166(02)00184-2

Reference yield:

Bromotrichloromethane (75-62-7) + bicyclo[2.1.0]pentane (185-94-4) → Cyclopentyl bromide (137-43-9) + cyclopent-3-enyl bromide (1781-66-4) + trans-1-bromo-2-(trichloromethyl)cyclopentane (17827-32-6,19640-06-3) + trans-1,2-dibromocyclopentane (10230-26-9) + trans-1-bromo-2-chlorocyclopentane (14376-82-0,37722-39-7,89180-35-8) + cis-1-bromo2-chlorocyclopentane (14376-82-0,37722-39-7,89180-35-8)

Guidance literature:

for 4h; Product distribution; Mechanism; Ambient temperature; Irradiation; Effect of added t-butyl hypochlorite;

Reference yield:

bicyclo[2.1.0]pentane (185-94-4) → cis-1,3-dibromocyclopentane (68479-47-0) + cyclopent-3-enyl bromide (1781-66-4) + trans-1,2-dibromocyclopentane (10230-26-9) + trans-1,3-dibromocyclopentane (68479-48-1)

Guidance literature:

With N-Bromosuccinimide; for 44h; Product distribution; Ambient temperature; Irradiation; Product composition depending on time.;

upstream raw materials:

Bromotrichloromethane

bicyclo[2.1.0]pentane

cyclopenta-1,3-diene

Downstream raw materials:

3-cyclopentene-1-carboxylic acid

1,1'-bis{4-[(trans-4-pentyl)cyclohexyl]phenyl}