2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE

Product Name: 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE
CAS No.: 211235-87-9
Chemical Name: 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE
Synonyms: 3,4-ethylenedioxythiophene-2,5-dicarboxaldehyde;2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE;Thieno[3,4-b]-1,4-dioxin-5,7-dicarboxaldehyde, 2,3-dihydro-
CBNumber: CB6679257
Molecular Formula: C8H6O4S
Formula Weight: 198.2
MOL File: 211235-87-9.mol

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2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE Property

Melting point:: 155 °C
Boiling point:: 403.4±45.0 °C(Predicted)
Density: 1.511±0.06 g/cm3(Predicted)
storage temp.: under inert gas (nitrogen or Argon) at 2–8 °C

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

TRC

Product number: D680118
Product name: 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarbaldehyde
Packaging: 50mg
Price: $90
Updated: 2021/12/16

TRC

Product number: D680118
Product name: 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarbaldehyde
Packaging: 100mg
Price: $130
Updated: 2021/12/16

American Custom Chemicals Corporation

Product number: CHM0097982
Product name: 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE
Purity: 95.00%
Packaging: 5MG
Price: $501.06
Updated: 2021/12/16

Crysdot

Product number: CD11166691
Product name: 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarbaldehyde
Purity: 95+%
Packaging: 5g
Price: $817
Updated: 2021/12/16

Alichem

Product number: 211235879
Product name: 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarbaldehyde
Packaging: 5g
Price: $825
Updated: 2021/12/16

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2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE Chemical Properties,Usage,Production

Synthesis

68-12-2

126213-50-1

211235-87-9

Under nitrogen protection, 3,4-ethylenedioxythiophene (EDOT, 3 g, 0.021 mol) was dissolved in anhydrous tetrahydrofuran (THF, 50 mL) and cooled to -78 °C. Subsequently, a solution of 1.6 M n-butyllithium (n-BuLi, 29 mL) was slowly added dropwise. After the dropwise addition, the reaction system was slowly warmed to 0 °C and stirred continuously at this temperature for 30 min. The reaction mixture was again cooled to -78 °C and quenched by the addition of dry N,N-dimethylformamide (DMF, 3.5 mL). The reaction mixture was transferred to room temperature conditions and stirring was continued for 2 hours. Upon completion of the reaction, the mixture was poured into crushed ice containing hydrochloric acid (pH=4) and a brown solid was precipitated. The solid was collected by filtration, washed with plenty of water and dried under vacuum. The crude product was recrystallized by cold methanol to afford the target compound 2,3-dihydrobenzo[3,4-b][1,4]dioxane-5,7-dibenzaldehyde (brown solid) in 75% yield. The product characterization data were as follows: IR (film) υmax: 2955, 2924, 2854, 1666, 1614, 1504, 1454, 1375 cm-1; 1H NMR (500 MHz, CDCl3): δ = 10.04 (s, 2H), 4.46 (s, 4H); 13C NMR (500 MHz, CDCl3): δ = 180.94, 147.15, 124.16, 65.15; Elemental analysis (C8H6O4S): Calculated values (%) C 48.48, H 3.04, S 16.14; Measured values: C 48.51, H 3.06, S 16.14.

References

[1] Journal of Molecular Liquids, 2017, vol. 225, p. 840 - 847
[2] Tetrahedron, 1999, vol. 55, # 40, p. 11745 - 11754
[3] Journal de Chimie Physique et de Physico-Chimie Biologique, 1998, vol. 95, # 6, p. 1234 - 1237
[4] Polymer, 2017, vol. 119, p. 274 - 284

2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE Preparation Products And Raw materials

Raw materials

Preparation Products

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2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE Suppliers

China 29 France 1 India 2 United States 4 Global 36

3B Pharmachem (Wuhan) International Co.,Ltd.

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211235-87-9, 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDERelated Search:

2,5-Thiophenedicarboxaldehyde 3,4-Dimethoxythiophene 7-carbamoyl-2H,3H-thieno[3,4-b][1,4]dioxine-5-carboxylic acid Thieno[3,4-b]-1,4-dioxin-5,7-dicarboxylic acid, 2,3-dihydro-, diethyl ester 2,5-Dicarboxylic acid-3,4-ethylenedioxythiophene 3,4-Ethylenedioxythiophene 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE

2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE

Thieno[3,4-b]-1,4-dioxin-5,7-dicarboxaldehyde, 2,3-dihydro-

3,4-ethylenedioxythiophene-2,5-dicarboxaldehyde

211235-87-9