74003-55-7

Basic information

• Product Name: 3,4-Dibromobenzaldehyde
• Synonyms: 3,4-DIBROMOBENZALDEHYDE;3,4-Dibromobenzaldehyde 99%;1,2-Dibromo-4-formylbenzene;3,4-Dibromobenzaldehyde99%
• CAS NO: 74003-55-7
• Molecular Formula: C₇H₄Br₂O
• Molecular Weight: 263.91
• EINECS: -0
• Product Categories: Adehydes, Acetals & Ketones;Bromine Compounds
• Mol File: 74003-55-7.mol

Chemical Properties

• Melting Point: 67-69°C
• Boiling Point: 303.6°C at 760 mmHg
• Flash Point: 123°C
• Appearance: /
• Density: 1.977g/cm³
• Vapor Pressure: 0.00092mmHg at 25°C
• Refractive Index: 1.645
• Storage Temp.: under inert gas (nitrogen or Argon) at 2-8°C
• Water Solubility: Insoluble in water.
• Sensitive: Air Sensitive
• BRN: 2573433
• CAS DataBase Reference: 3,4-Dibromobenzaldehyde(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4-Dibromobenzaldehyde(74003-55-7)
• EPA Substance Registry System: 3,4-Dibromobenzaldehyde(74003-55-7)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36
• Hazardous Substances Data: 74003-55-7(Hazardous Substances Data)

Usage

Uses

Used in Organic Synthesis:
3,4-Dibromobenzaldehyde is used as a key intermediate in the synthesis of various organic compounds, particularly those with pi-conjugated systems. Its reactivity allows for the formation of new chemical bonds and the creation of complex molecular structures.
Used in the Preparation of Isomeric Branched pi-Conjugated Systems:
3,4-Dibromobenzaldehyde is used as a reactant in the preparation of isomeric branched pi-conjugated systems with terminal alkyne. This application is particularly relevant in the field of materials science, where such systems are of interest for their electronic and optical properties. 3,4-Dibromobenzaldehyde reacts with 4-(triisopropylsilylethynyl) phenylacetylene to form the desired pi-conjugated system, which can be further utilized in the development of advanced materials and devices.

InChI:InChI=1/C7H4Br2O/c8-6-2-1-5(4-10)3-7(6)9/h1-4H

Upstream product

• 163596-75-6 4-bromo-3-nitrobenzaldehyde 
• 68119-98-2 1,2-dibromo-4-(hydroxymethyl)benzene 
• 1122-91-4 4-bromo-benzaldehyde 

Downstream Products

• 619-03-4 3,4-dibromobenzoic acid 
• 56990-05-7 4,5-dibromo-2-nitrobenzaldehyde 
• 313228-48-7 4-formyl-1,2-dicyanobenzene 
• 390407-76-8 2-(3,4-dibromo-phenyl)-oxirane 
• 315187-01-0 9-(3,4-dibromophenyl)-2,3,5,6,7,9-hexahydrothieno[3,2-b]quinolin-8(4H)-one 1,1-dioxide 
• 866240-55-3 3,4-bis-(3,4-bis-{4-[(triisopropylsilanyl)-ethynyl]-phenylethynyl}-phenylethynyl)-benzaldehyde 
• 866240-51-9 3,4-bis-{4-[(triisopropylsilanyl)-ethynyl]-phenylethynyl}-benzaldehyde 
• 927670-48-2 2-butyl-4-(3,4-dibromo-phenyl)-5-oxo-4,5,6,8-tetrahydro-1H-pyrano[3,4-b]pyridine-3-carboxylic acid ethyl ester 
• 1008165-89-6 C₇₁H₁₁₀O₅ 
• 390407-86-0 2-cyclobutylamino-1-(3,4-dibromo-phenyl)-ethanol 

Relevant articles and documents

Co-immobilization of Laccase and TEMPO in the Compartments of Mesoporous Silica for a Green and One-Pot Cascade Synthesis of Coumarins by Knoevenagel Condensation

Co-immobilization of bio- and chemocatalysts produces sustainable, recyclable hybrid systems that open new horizons for green cascade approaches in organic synthesis. Here, the co-immobilization of laccase and 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) in mesoporous silica was used for the one-pot aqueous synthesis of 30 coumarin-3-carboxylate derivatives under mild conditions through the condensation of in situ oxidized 2-hydroxybenzyl alcohols and malonate derivatives. A maximum yield was obtained after incubating at pH 6.0 and 45 °C for 24 h. An efficient organic synthesis was catalyzed by the hybrid catalyst in 10 % organic solvent. More than 95 % of the initial activity of the enzyme was preserved after 10 cycles, and no significant catalyst deactivation occurred after 10 runs. This new system efficiently catalyzed the in situ aerobic oxidation of salicyl alcohols, followed by Knoevenagel condensation, which confirmed the possibility of producing efficient hybrid catalysts by co-immobilization of catalytic species in mesoporous materials.

Pesticidal cyclopropyl-2,4-dieneamides

The present Application discloses pesticidally active compounds of the formula (I): or a salt thereof, wherein Q is an monocyclic aromatic ring. or fused bicyclic ring system of which at least one ring is aromatic containing 9 or 10 atoms of which one may be nitrogen and the rest carbon each optionally substituted, or Q is a dihalovinyl group or a group R6 --C C-- where R6 is C1-4 alkyl, tri C1-4 alkylsilyl, halogen or hydrogen; Q1 is a 1,2-cyclopropyl ring optionally substituted by one or more groups selected from C1-3 alkyl. halo, C1-3 haloalkyl, alkynyl, or cyano; R2,R3, R4 and R5 are the same or different with at least one being hydrogen and the others being independently selected from hydrogen, halo. C1-4 alkyl or C1-4 haloalkyl; X is oxygen or sulphur; and R1 is selected from hydrogen and C1-8 hydrocarbyl optionally substituted by dioxalanyl, halo, cyano, trifluoromethyl, trifluoromethylthio or C1-6 alkoxy. their preparation, pesticidal compositions containing them and their use against pests.