1,4-Dibromo-2-methyl-2-butene

Base Information

• Chemical Name: 1,4-Dibromo-2-methyl-2-butene
• CAS No.: 18860-95-2
• Molecular Formula: C5H8Br2
• Molecular Weight: 227.927
• DSSTox Substance ID: DTXSID901031493
• Nikkaji Number: J1.116.731D,J1.510.894K
• Wikidata: Q76387053
• Mol file: 18860-95-2.mol

Synonyms:1,4-Dibromo-2-methyl-2-butene;Isoprene dibromide;2-Butene, 1,4-dibromo-2-methyl-;1,4-Dibromoisoprene;18860-95-2;(Z)-1,4-dibromo-2-methylbut-2-ene;(E)-1,4-dibromo-2-methylbut-2-ene;C5-H8-Br2;SCHEMBL2019871;DTXSID901031493;(E)-1,4-dibromo-2-methyl-2-butene;LS-46964;EN300-26977309

Chemical Property of 1,4-Dibromo-2-methyl-2-butene

Chemical Property:

• Vapor Pressure: 0.227mmHg at 25°C
• Boiling Point: 214.5°C at 760 mmHg
• Flash Point: 86.4°C
• PSA: 0.00000
• Density: 1.741g/cm³
• LogP: 2.72250
• XLogP3: 2.7
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 0
• Rotatable Bond Count: 2
• Exact Mass: 227.89723
• Heavy Atom Count: 7
• Complexity: 66.5

Purity/Quality:

99%, ^*data from raw suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

• Canonical SMILES: CC(=CCBr)CBr
• Isomeric SMILES: C/C(=C\CBr)/CBr

Technology Process of 1,4-Dibromo-2-methyl-2-butene

There total 8 articles about 1,4-Dibromo-2-methyl-2-butene 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: 42.0%

isoprene (78-79-5,9003-31-0) → 1,4-dibromo-2-methylbut-2-ene (18860-95-2) + 1-bromo-2-hydroxy-2-methyl-3-butene (36219-40-6)

Guidance literature:

With hydrogen bromide; dihydrogen peroxide; at 40 ℃; for 3h;

DOI:10.1007/BF00470013

Reference yield: 38.0%

isoprene (78-79-5,9003-31-0) → 1,4-dibromo-2-methylbut-2-ene (18860-95-2)

Guidance literature:

With selenium(IV) oxide; trimethylsilyl bromide; In dichloromethane; at 0 ℃; for 1h;

DOI:10.1007/BF00953371

Reference yield: 38.0%

(E/Z)-2-methylbut-2-ene-1,4-diol → 1,4-dibromo-2-methylbut-2-ene (18860-95-2)

Guidance literature:

With pyridine; phosphorus tribromide; In diethyl ether; at 0 - 20 ℃; for 3h;

DOI:10.1039/d0cc05565d

upstream raw materials:

3,4-dibromo-2-methyl-but-1-ene

isoprene

citraconic acid anhydride

Downstream raw materials:

ethyl 2-methyl-5-isopropenyl-4,5-dihydrofuran-3-carboxylate

ethyl 2,5-dimethyl-5-vinyl-4,5-dihydrofuran-3-carboxylate

dimethyl 2-vinyl-2-methyl-1,1-cyclopropanedicarboxylate

<2RS>-2-Isopropenylcyclopropan-1,1-dicarbonsaeure-dimethylester