55745-70-5

Basic information

• Product Name: 2,3-Dihydrobenzo[b]furan-5-carbaldehyde
• Synonyms: 2,3-DIBENZO[B]FURAN-5-CARBOXALDEHYDE;2,3-DIHYDRO-1-BENZOFURAN-5-CARBALDEHYDE;2,3-DIHYDROBENZOFURAN-5-CARBALDEHYDE;2,3-DIHYDROBENZOFURAN-5-CARBOXALDEHYDE;2,3-DIHYDROBENZO[B]FURAN-5-CARBALDEHYDE;2,3-DIHYDROBENZO[B]FURAN-5-CARBOXALDEHYDE;AKOS MSC-0772;BUTTPARK 27\04-60
• CAS NO: 55745-70-5
• Molecular Formula: C₉H₈O₂
• Molecular Weight: 148.16
• EINECS: 259-788-1
• Product Categories: ALDEHYDE;Fluorobenzene;Carbonyl Compounds;Heterocycles;Heterocycle intermediates;Aromatics Compounds;Furans;Aromatics;Pharmaceutical intermediate;Benzofurans;Building Blocks;Heterocyclic Building Blocks
• Mol File: 55745-70-5.mol
• Article Data: 28

Chemical Properties

• Melting Point: 191～193℃
• Boiling Point: 88-89 °C0.1 mm Hg(lit.)
• Flash Point: >230 °F
• Appearance: /
• Density: 1.177 g/mL at 25 °C(lit.)
• Vapor Pressure: 0.00452mmHg at 25°C
• Refractive Index: n20/D 1.6000(lit.)
• Storage Temp.: 2-8°C(protect from light)
• CAS DataBase Reference: 2,3-Dihydrobenzo[b]furan-5-carbaldehyde(CAS DataBase Reference)
• NIST Chemistry Reference: 2,3-Dihydrobenzo[b]furan-5-carbaldehyde(55745-70-5)
• EPA Substance Registry System: 2,3-Dihydrobenzo[b]furan-5-carbaldehyde(55745-70-5)

Safety Data

• Hazard Codes: Xi
• Statements: 43
• Safety Statements: 37/39
• WGK Germany: 3
• HazardClass: IRRITANT
• Hazardous Substances Data: 55745-70-5(Hazardous Substances Data)

Usage

Chemical Properties

White to light yellow liquid

Uses

Hair dye composition.

InChI:InChI=1/C9H8O2/c10-6-7-1-2-9-8(5-7)3-4-11-9/h1-2,5-6H,3-4H2

Upstream product

• 109-72-8 n-butyllithium 
• 66826-78-6 5-bromo-2,3-dihydrobenzo[b]furan 
• 103529-11-9 3-bromo-4-hydroxy-5-methylbenzaldehyde 
• 15174-69-3 4-hydroxy-3-methyl-benzaldehyde 
• 808750-22-3 3-bromo-4-methoxy-5-methyl benzaldehyde 
• 76429-73-7 2,3-dihydrobenzofuran-5-carboxylic acid 
• 615-58-7 2,4-dibromophenol 
• 496-16-2 2.3-dihydrobenzofuran 
• 68-12-2 N,N-dimethyl-formamide 
• 4885-02-3 Dichloromethyl methyl ether 
• 542-88-1 bis(2-chloromethyl)ether 
• 74-90-8 hydrogen cyanide 

Downstream Products

• 835885-26-2 1-(2,6-bis-benzyloxy-4-methyl-phenyl)-3-(2,3-dihydro-benzofuran-5-yl)-propenone 
• 943761-68-0 C₂₈H₂₆N₂O₃ 
• 374927-33-0 2-[5-(3-benzyl-2-methyl-3H-imidazol-4-yl)pyrimidin-2-yl]-1-(2,3-dihydrobenzofuran-5-yl)-2,3,4,9-tetrahydro-1H-β-carboline 
• 374926-57-5 2-benzyl-1-(2,3-dihydro-benzofuran-5-yl)-2,3,4,9-tetrahydro-1H-β-carboline 
• 374926-61-1 1,2,3,4-tetrahydro-2-benzyl-3-(2,3-dihydrobenzofuran-5-yl)-9H-pyrrolo[3,4-b]quinolin-9-one 
• 1177251-90-9 1-[(1-benzyl-1H-tetrazol-5-yl)(2,3-dihydro-1-benzofuran-5-yl)methyl]-4-cyclobutyl-1,4-diazepane 
• 1311593-57-3 C₁₉H₂₃NO₅ 
• 203505-84-4 3-(2,3-dihydro-1-benzofuran-5-yl)-2-propenoic acid 
• 196597-65-6 ethyl (E)-3-(2,3-dihydrobenzofuran-5-yl)-2-propenoate 
• 103262-35-7 (2,3-dihydrobenzo[b]furan-5-yl)methanol 
• 374633-80-4 1-(2,3-dihydro-benzofuran-5-yl)-2-[5-(4-methoxy-phenyl)-pyrimidin-2-yl]-2,3,4-9-tetrahydro-1H-β-carboline 
• 374633-82-6 4-[2-[1-(2,3-dihydrobenzofuran-5-yl)-1,3,4,9-tetrahydro-β-carbolin-2-yl]-pyrimidin-5-yl]-phenol 

Relevant articles and documents

Redox-Neutral Coupling between Two C(sp3)?H Bonds Enabled by 1,4-Palladium Shift for the Synthesis of Fused Heterocycles

The intramolecular coupling of two C(sp3)?H bonds to forge a C(sp3)?C(sp3) bond is enabled by 1,4-Pd shift from a trisubstituted aryl bromide. Contrary to most C(sp3)?C(sp3) cross-dehydrogenative couplings, this reaction operates under redox-neutral conditions, with the C?Br bond acting as an internal oxidant. Furthermore, it allows the coupling between two moderately acidic primary or secondary C?H bonds, which are adjacent to an oxygen or nitrogen atom on one side, and benzylic or adjacent to a carbonyl group on the other side. A variety of valuable fused heterocycles were obtained from easily accessible ortho-bromophenol and aniline precursors. The second C?H bond cleavage was successfully replaced with carbonyl insertion to generate other types of C(sp3)-C(sp3) bonds.

Selective reduction of carboxylic acids to aldehydes with hydrosilane: Via photoredox catalysis

The direct reduction of carboxylic acids to aldehydes with hydrosilane was achieved through visible light photoredox catalysis. The combination of both single electron transfer and hydrogen atom transfer steps offers a novel and convenient approach to selective reduction of carboxylic acids to aldehydes. The method also features mild conditions, high yields, broad substrate scope, and good functional group tolerance, such as alkyne, ester, ketone, amide and amine groups.

Method for recovering and utilizing byproduct of chlorination of phosphorus pentachloride

The invention relates to a technology for comprehensively utilizing the byproduct of chlorination of phosphorus pentachloride, and mainly relates to a post treatment, which scientifically utilizes the excess phosphorus pentachloride reagent. The byproduct is converted into an organic synthesis reagent with a wide application range. The wastes are converted into a valuable resource. The discharge of waste water, waste gas, and waste solid is reduced. The obtained reagent is an excellent active reagent, which is widely used in the chemical industry, pharmacy industry, and material industry. The production cost is reduced, and the environment is protected.