3,5-dibromo-2H-Pyran-2-one

Base Information

• Chemical Name: 3,5-dibromo-2H-Pyran-2-one
• CAS No.: 19978-41-7
• Molecular Formula: C5H2Br2O2
• Molecular Weight: 253.878
• Hs Code.: 2932999099
• European Community (EC) Number: 895-183-4
• Nikkaji Number: J151.499G
• Mol file: 19978-41-7.mol

Synonyms:3,5-dibromo-2-pyrone

Chemical Property of 3,5-dibromo-2H-Pyran-2-one

Chemical Property:

• Vapor Pressure: 0.0667mmHg at 25°C
• Boiling Point: 230.2oC at 760 mmHg
• Flash Point: 93oC
• PSA: 30.21000
• Density: 2.411g/cm3
• LogP: 2.16480
• Storage Temp.: Inert atmosphere,Room Temperature
• XLogP3: 2.1
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 2
• Rotatable Bond Count: 0
• Exact Mass: 253.84011
• Heavy Atom Count: 9
• Complexity: 205

Purity/Quality:

97% ^*data from raw suppliers

3,5-Dibromo-2H-pyran-2-one 97% ^*data from reagent suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

• Canonical SMILES: C1=C(C(=O)OC=C1Br)Br

Technology Process of 3,5-dibromo-2H-Pyran-2-one

There total 8 articles about 3,5-dibromo-2H-Pyran-2-one 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: 76.0%

2H-pyran-2-one-5-carboxylic acid (500-05-0) → 5-bromo-2H-pyran-2-one (19978-33-7) + 3,5-dibromo-2H-pyran-2-one (19978-41-7)

Guidance literature:

With N-Bromosuccinimide; lithium acetate; tetrabutylammomium bromide; In tetrachloromethane; acetonitrile; at 65 ℃;

DOI:10.1021/jo015804r

Reference yield: 43.0%

3,5-dibromo-5,6-dihydro-2H-pyran-2-one (137776-72-8,56207-18-2) → 3-bromo-2H-pyran-2-one (19978-32-6) + 5-bromo-2H-pyran-2-one (19978-33-7) + 3,5-dibromo-2H-pyran-2-one (19978-41-7)

Guidance literature:

With triethylamine; In dichloromethane; at 20 ℃;

DOI:10.1021/jo048037f

Reference yield: 31.0%

5,6-dihydro-pyran-2-one (3393-45-1) → 3-bromo-2H-pyran-2-one (19978-32-6) + 5-bromo-2H-pyran-2-one (19978-33-7) + 3,5-dibromo-2H-pyran-2-one (19978-41-7)

Guidance literature:

5,6-dihydro-pyran-2-one; With bromine; Schlenk technique; Inert atmosphere;

With triethylamine; Further stages; Schlenk technique; Inert atmosphere;

DOI:10.1002/chem.201602012

upstream raw materials:

2H-pyran-2-one-5-carboxylic acid

3,5-dibromo-5,6-dihydro-2H-pyran-2-one

5,6-dihydro-pyran-2-one

3-Bromo-5,6-dihydro-2H-pyran-2-one

Downstream raw materials:

5-bromo-3-phenylpyran-2-one

3-bromo-5-phenylpyran-2-one

5-bromo-3-pyridin-2-yl-pyran-2-one

3-phenylamino-5-bromo-2-pyrone