3,4-Dibromobenzaldehyde

Base Information

• Chemical Name: 3,4-Dibromobenzaldehyde
• CAS No.: 74003-55-7
• Molecular Formula: C7H4 Br2 O
• Molecular Weight: 263.916
• Hs Code.: 2913000090
• Mol file: 74003-55-7.mol

Synonyms:3,4-Dibromobenzaldehyde

Chemical Property of 3,4-Dibromobenzaldehyde

Chemical Property:

• Vapor Pressure: 0.00092mmHg at 25°C
• Melting Point: 67-69°C
• Boiling Point: 303.6°C at 760 mmHg
• Flash Point: 123°C
• PSA: 17.07000
• Density: 1.977g/cm³
• LogP: 3.02410
• Storage Temp.: under inert gas (nitrogen or Argon) at 2-8°C
• Sensitive.: Air Sensitive
• Water Solubility.: Insoluble in water.

Purity/Quality:

98% ^*data from raw suppliers

3,4-Dibromobenzaldehyde ^*data from reagent suppliers

Safty Information:

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36

MSDS Files:

SDS file from LookChem

Useful:

• Uses: 3,4-Dibromobenzaldehyde is used in the preparation of isomeric branched pi-conjugated system with terminal alkyne by reacting with 4-(triisopropylsilylethynyl) phenylacetylene.

Technology Process of 3,4-Dibromobenzaldehyde

There total 4 articles about 3,4-Dibromobenzaldehyde 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:

1,2-dibromo-4-(hydroxymethyl)benzene (68119-98-2) → 3,4-dibromobenzaldehyde (74003-55-7)

Guidance literature:

With oxygen; In aq. buffer; at 45 ℃; for 10h; pH=4.5; Reagent/catalyst; Green chemistry;

DOI:10.1002/cctc.201701527

Reference yield:

4-bromo-3-nitrobenzaldehyde (163596-75-6) → 3,4-dibromobenzaldehyde (74003-55-7)

Guidance literature:

With sodium dithionite; water; Diazotieren und Umsetzen mit Kupfersulfat und Natriumbromid in Wasser;

Reference yield:

4-bromo-benzaldehyde (1122-91-4) → 3,4-dibromobenzaldehyde (74003-55-7)

Guidance literature:

Multi-step reaction with 2 steps

1: concentrated sulfuric acid; sodium nitrate / 15 - 20 °C / anschl. Erhitzen auf 70grad

2: Na₂S₂O₄; water / Diazotieren und Umsetzen mit Kupfersulfat und Natriumbromid in Wasser

With sodium nitrate; sodium dithionite; sulfuric acid; water;

upstream raw materials:

4-bromo-3-nitrobenzaldehyde

4-bromo-benzaldehyde

1,2-dibromo-4-(hydroxymethyl)benzene

Downstream raw materials:

4-(3,4-dibromo-benzyl)-piperazine-1-carboxylic acid tert-butyl ester

methyl 4-(3,4-dibromophenyl)-2-methyl-5-oxo-4,5,6,8-tetrahydro-1H-pyrano[3,4-b]pyridine-3-carboxylate

Refernces

• 1、 -. "Pesticidal cyclopropyl-2,4-dieneamides". . . Retrieved 2008/06/13.