Methyl thieno[2,3-b]thiophene-2-carboxylate

Modify Date: 2025-09-18 23:54:04

Methyl thieno[2,3-b]thiophene-2-carboxylate Structure
Methyl thieno[2,3-b]thiophene-2-carboxylate structure
Common Name Methyl thieno[2,3-b]thiophene-2-carboxylate
CAS Number 20969-37-3 Molecular Weight 198.262
Density 1.4±0.1 g/cm3 Boiling Point 308.2±22.0 °C at 760 mmHg
Molecular Formula C8H6O2S2 Melting Point N/A
MSDS N/A Flash Point 140.2±22.3 °C

 Names

Name Methyl thieno[2,3-b]thiophene-2-carboxylate
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.4±0.1 g/cm3
Boiling Point 308.2±22.0 °C at 760 mmHg
Molecular Formula C8H6O2S2
Molecular Weight 198.262
Flash Point 140.2±22.3 °C
Exact Mass 197.980927
PSA 82.78000
LogP 5.21
Vapour Pressure 0.0±0.7 mmHg at 25°C
Index of Refraction 1.673

 Safety Information

HS Code 2934999090

 Synthetic Route

~82%

Methyl thieno[2,3-b]thiophene-2-carboxylate Structure

Methyl thieno[2...

CAS#:20969-37-3

Literature: Eisai Co., Ltd. Patent: US5340833 A1, 1994 ; US 5340833 A

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Methyl thieno[2,3-b]thiophene-2-carboxylate Structure

Methyl thieno[2...

CAS#:20969-37-3

Literature: Merck and Co., Inc. Patent: US6642237 B1, 2003 ; Location in patent: Page/Page column 124 ;

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Methyl thieno[2,3-b]thiophene-2-carboxylate Structure

Methyl thieno[2...

CAS#:20969-37-3

Literature: Prugh; Hartman; Mallorga; McKeever; Michelson; Murcko; Schwam; Smith; Sondey; Springer; Sugrue Journal of Medicinal Chemistry, 1991 , vol. 34, # 6 p. 1805 - 1818

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Methyl thieno[2,3-b]thiophene-2-carboxylate Structure

Methyl thieno[2...

CAS#:20969-37-3

Literature: Prugh; Hartman; Mallorga; McKeever; Michelson; Murcko; Schwam; Smith; Sondey; Springer; Sugrue Journal of Medicinal Chemistry, 1991 , vol. 34, # 6 p. 1805 - 1818

~%

Methyl thieno[2,3-b]thiophene-2-carboxylate Structure

Methyl thieno[2...

CAS#:20969-37-3

Literature: Kukolja; Draheim; Graves; Hunden; Pfeil; Cooper; Ott; Counter Journal of medicinal chemistry, 1985 , vol. 28, # 12 p. 1896 - 1903

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Methyl thieno[2,3-b]thiophene-2-carboxylate Structure

Methyl thieno[2...

CAS#:20969-37-3

Literature: Challenger; Emmott Journal of the Institute of Petroleum, 1951 , vol. 37, p. 396,401 Full Text Show Details Challenger et al. Journal of the Institute of Petroleum, 1948 , vol. 34, p. 922,927

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Methyl thieno[2,3-b]thiophene-2-carboxylate Structure

Methyl thieno[2...

CAS#:20969-37-3

Literature: Challenger; Emmott Journal of the Institute of Petroleum, 1951 , vol. 37, p. 396,401

 Customs

HS Code 2934999090
Summary 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

 Synonyms

Methyl thieno[2,3-b]thiophene-2-carboxylate
methyl thien-3-yl-acetate
Thieno[2,3-b]thiophene-2-carboxylic acid, methyl ester
methyl thieno<2,3-b>thiophene-2-carboxylate
Methylthiophene-3-acetate
methyl thiophen-3-acetate
thiophen-3-yl-acetic acid methyl ester
3-Thiopheneacetic acid,methyl ester
methyl thieno<2,3-b>thiophene-2-carboxylic acid
Methyl 3-thienylacetate
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