ChemicalBook > CAS DataBase List > 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE

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

Product Name
2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE
CAS No.
204905-77-1
Chemical Name
2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE
Synonyms
3,4-Ethylenedi;2-Formyl-3,4-ethylenedioxythiophene;3,4-Ethylenedioxothiophene-2-carbaldehyde;3,4-Ethylenedioxythiophene-2-carbaldehyde;2-(3,4-ethylenedioxythiophene)carbaldehyde;3,4-Ethylenedioxythiophene-2-carboxaldehyde;2,3-dihydrothieno[3,4-b][1,4]dioxine-5-carbaL;2,3-dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehy;2,3-Dihydrothieno[3,4-b]-1,4-dioxin-5-carbaldehyde;2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE
CBNumber
CB3233322
Molecular Formula
C7H6O3S
Formula Weight
170.19
MOL File
204905-77-1.mol
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2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE Property

Melting point:
138 °C
Boiling point:
311.2±42.0 °C(Predicted)
Density 
1.424±0.06 g/cm3(Predicted)
storage temp. 
under inert gas (nitrogen or Argon) at 2–8 °C
Appearance
Off-white to light brown Solid
λmax
413nm(CH2Cl2)(lit.)
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Safety

HS Code 
2934999090
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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

H332Harmful if inhaled

H335May cause respiratory irritation

Precautionary statements

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

P280Wear protective gloves/protective clothing/eye protection/face protection.

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

TCI Chemical
Product number
E1150
Product name
3,4-Ethylenedioxythiophene-2-carboxaldehyde
Purity
>98.0%(GC)
Packaging
1g
Price
$59
Updated
2025/07/31
TCI Chemical
Product number
E1150
Product name
3,4-Ethylenedioxythiophene-2-carboxaldehyde
Purity
>98.0%(GC)
Packaging
5g
Price
$294
Updated
2025/07/31
TRC
Product number
D492853
Product name
2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde
Packaging
100mg
Price
$60
Updated
2021/12/16
Biosynth Carbosynth
Product number
FD142841
Product name
2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde
Packaging
250mg
Price
$62.5
Updated
2021/12/16
AK Scientific
Product number
X4156
Product name
2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde
Packaging
1g
Price
$103
Updated
2021/12/16
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2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE Chemical Properties,Usage,Production

Chemical Properties

Gray crystal

Synthesis

68-12-2

126213-50-1

204905-77-1

General procedure for the synthesis of 2-(3,4-ethenyldioxythiophene) formaldehyde from N,N-dimethylformamide (DMF) and 3,4-ethenyldioxythiophene (EDOT): to a mixture containing EDOT (15.0 g, 0.1 mol) and DMF (11.0 g, 0.15 mol) was added slowly and dropwise at 0 °C a mixture of 2-(3,4-ethenyldioxythiophene) and 3,4-ethenyldioxythiophene (EDOT) dissolved in anhydrous dichloromethane ( 80 mL) in triphosgene (BTC, 11.9 g, 0.04 mol). The reaction mixture was warmed to 35 °C and stirred continuously for 1 h. Subsequently, it was cooled to room temperature and poured into ice water (250 mL). The pH of the aqueous phase was adjusted to 7-8 with 10% sodium hydroxide solution and the organic phase was separated. The aqueous phase was extracted three times with dichloromethane. All organic phases were combined and dried with anhydrous magnesium sulfate. After removal of the solvent by distillation under reduced pressure, the crude product was recrystallized by 95% ethanol to give a white needle-like crystal product (15.5 g, 86.3% yield). The product was characterized by 1H NMR (400 MHz): δ/ppm: 9.90 (s, 1H), 6.79 (s, 1H), 4.38-4.25 (m, 4H).

References

[1] Advanced Functional Materials, 2011, vol. 21, # 4, p. 634 - 643
[2] Tetrahedron, 1999, vol. 55, # 40, p. 11745 - 11754
[3] Journal of the American Chemical Society, 2004, vol. 126, # 50, p. 16440 - 16450
[4] Physical Chemistry Chemical Physics, 2015, vol. 17, # 8, p. 5776 - 5784
[5] Russian Journal of Applied Chemistry, 2010, vol. 83, # 8, p. 1435 - 1439

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

Raw materials

Preparation Products

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

Americas 1 Belgium 1 China 88 Europe 1 France 1 India 3 Japan 1 United Kingdom 2 United States 14 Global 112
J & K SCIENTIFIC LTD.
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View Lastest Price from 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE manufacturers

Career Henan Chemical Co
Product
2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE 204905-77-1
Price
US $3.00/KG
Min. Order
1KG
Purity
98%
Supply Ability
200KG
Release date
2020-01-08

204905-77-1, 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDERelated Search:

3,3'-DIMETHYL-2,2'-BITHIOPHENYL Urethane o-Phthalaldehyde CALCIUM ALUMINATE Methyl tetrahydrophthalic anhydride 2,5-Dicarboxylic acid-3,4-ethylenedioxythiophene 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE 7-BROMO-2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBOXYLIC ACID 2,3-DIHYDRO-7-(2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXIN-5-YL)THIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXIN-5-CARBONYL CHLORIDE 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5,7-DICARBALDEHYDE 7-BROMO-2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE 2,2',3,3'-TETRAHYDRO-[5,5'-BITHIENO[3,4-B]-1,4-DIOXIN]-7,7'-DICARBOXALDEHYDE Thieno[3,4-b]-1,4-dioxin-5,7-dicarboxylic acid, 2,3-dihydro-, diethyl ester 7-BROMO-2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBONYL CHLORIDE 90 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBOXYLIC ACID 7-VINYL-2,3-DIHYDRO-THIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE 7-carbamoyl-2H,3H-thieno[3,4-b][1,4]dioxine-5-carboxylic acid

  • 3,4-Ethylenedioxythiophene-2-carbaldehyde
  • 3,4-Ethylenedioxothiophene-2-carbaldehyde
  • Thieno[3,4-b]-1,4-dioxin-5-carboxaldehyde, 2,3-dihydro-
  • 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE
  • 2-Formyl-3,4-ethylenedioxythiophene
  • 3,4-Ethylenedioxythiophene-2-carboxaldehyde
  • 2,3-Dihydrothieno[3,4-b]-1,4-dioxin-5-carbaldehyde
  • 2,3-dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehy
  • 3,4-Ethylenedi
  • 2,3-dihydro-Thieno[3,4-b]-1,4-dioxin-5-carboxaldehyde
  • 2,3-dihydrothieno[3,4-b][1,4]dioxine-5-carbaL
  • 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carboxaldehyde
  • 2-(3,4-ethylenedioxythiophene)carbaldehyde
  • 204905-77-1