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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

2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde Structure
2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde structure
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
Molecular Weight:
170.19
MDL Number:
MFCD01651766
MOL File:
204905-77-1.mol
MSDS File:
SDS
Last updated:2026-09-12 18:51:51
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2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde Properties

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.)

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H332-H335
Precautionary statements  P261-P280-P305+P351+P338
HS Code  2934999090
NFPA 704
0
2 0

2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde price More Price(37)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
TCI Chemical E1150 3,4-Ethylenedioxythiophene-2-carboxaldehyde >98.0%(GC) 204905-77-1 1g $50 2026-04-30 Buy
TCI Chemical E1150 3,4-Ethylenedioxythiophene-2-carboxaldehyde >98.0%(GC) 204905-77-1 5g $250 2026-04-30 Buy
Apolloscientific OR322518 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde 97% 204905-77-1 250mg $21 2026-06-04 Buy
Apolloscientific OR322518 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde 97% 204905-77-1 1g $24 2026-06-04 Buy
Apolloscientific OR322518 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde 97% 204905-77-1 5g $37 2026-06-04 Buy
Product number Packaging Price Buy
E1150 1g $50 Buy
E1150 5g $250 Buy
OR322518 250mg $21 Buy
OR322518 1g $24 Buy
OR322518 5g $37 Buy

2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde Chemical Properties, Uses, Production

Chemical Properties

Gray crystal

Synthesis

N,N-Dimethylformamide

68-12-2

3,4-Ethylenedioxythiophene

126213-50-1

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

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 synthesis

75-27-4
126213-50-1
211235-87-9
204905-77-1
Synthesis of 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde from Bromodichloromethane and 3,4-Ethylenedioxythiophene

2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde Preparation Products And Raw materials

Raw materials

N,N-Dimethylformamide Bromodichloromethane 3,4-Ethylenedioxythiophene Triphosgene Dichloromethane

Preparation Products

2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde Suppliers

Global Suppliers ( 109)
Supplier Tel Email Country ProdList Advantage
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Nanjing Vital Chemical Co., Ltd. Please Send Email 18652950785 chemweiao@163.com China 4368 65
Chengdu Ai Keda Chemical Technology Co., Ltd. 4008-755-333 18080918076 800078821@qq.com China 9706 55
Thermo Fisher Scientific 800-810-5118 cnchemical@thermofisher.com China 17752 75
Beijing HuaMeiHuLiBiological Chemical 010-56205725 waley188@sohu.com China 12323 58
TOKYO CHEMICAL INDUSTRY CO., LTD. 03-36680489 Sales-JP@TCIchemicals.com Japan 28364 80
TCI Europe 320-37350700 sales@tcieurope.eu Europe 23654 75
TCI AMERICA 800-4238616 sales@tciamerica.com Americas 23636 75
9ding chemical ( Shanghai) Limited 4009209199 sales@9dingchem.com China 22497 55
Supplier Advantage
J & K SCIENTIFIC LTD. 76
Energy Chemical 61
Nanjing Vital Chemical Co., Ltd. 65
Chengdu Ai Keda Chemical Technology Co., Ltd. 55
Thermo Fisher Scientific 75
Beijing HuaMeiHuLiBiological Chemical 58
TOKYO CHEMICAL INDUSTRY CO., LTD. 80
TCI Europe 75
TCI AMERICA 75
9ding chemical ( Shanghai) Limited 55

View Latest Price from 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE pictures 2020-01-09 2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE
204905-77-1
 $3.00 1KG 98% 200KG Career Henan Chemical Co

2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde Spectrum

2,3-DIHYDROTHIENO[3,4-B][1,4]DIOXINE-5-CARBALDEHYDE(204905-77-1)1HNMR

204905-77-1 (2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde) Related Search:

Urethane o-Phthalaldehyde CALCIUM ALUMINATE Methyl tetrahydrophthalic anhydride 3,3'-Dimethyl-2,2'-bithiophenyl
2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde 2,5-Dicarboxylic acid-3,4-ethylenedioxythiophene 2,3-Dihydrothieno[3,4-b][1,4]dioxin-5-carbonyl chloride 2,2',3,3'-Tetrahydro-[5,5'-bithieno[3,4-b]-1,4-dioxin]-7,7'-dicarboxaldehyde 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-Bromo-2,3-dihydrothieno[3,4-b][1,4]dioxine-5-carboxylic acid 7-Bromo-2,3-dihydrothieno[3,4-b][1,4]dioxine-5-carboxaldehyde 97 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarbaldehyde 2,3-Dihydro-7-(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)thieno[3,4-b][1,4]dioxine-5-carbaldehyde
Thieno[3,4-b]-1,4-dioxin-5,7-dicarboxylic acid, 2,3-dihydro-, diethyl ester 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

1of4

3,4-Ethylenedioxythiophene-2-carbaldehyde 3,4-Ethylenedioxothiophene-2-carbaldehyde Thieno[3,4-b]-1,4-dioxin-5-carboxaldehyde, 2,3-dihydro- 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 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde 204905-77-1