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Dayang Chem (Hangzhou) Co.,Ltd.

As a leading manufacturer and supplier of chemicals in China, DayangChem not only supply popular chemicals, but also DayangChem's R&D center offer custom synthesis services. DayangChem can provide different quantities of custom synthesis ch

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

inquiry

Xi'an Xszo Chem Co., Ltd.

1. Factory price and high quality must be guaranteed, base on 8 years of production and R&D experience2. Free samples will be provided,ensure specifications and quality are right for customer3. Customers will receive the most professional technical s

Factory Price OLED 99% 25796-77-4 4H-cyclopenta[2,1-b:3,4-b’]dithiophene-4-one Manufacturer

Cas:25796-77-4

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

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Jinan Finer Chemical Co., Ltd

Product Description Product website: http://www.finerchem.com Product Name 4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one CAS

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:1 Gram

FOB Price: $12.0

Type:Lab/Research institutions

inquiry

Zhuozhou Wenxi import and Export Co., Ltd

WITH US,YOUR MONEY IN SAFE,YOUR BUSINESS IN SAFE 1)Quick Response Within 12 hours; 2)Quality Guarantee: All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France et

Factory direct supply CAS 25796-77-4 with best quality

Cas:25796-77-4

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Hebei Sankai Chemical Technology Co., Ltd

1. Product advantages ♦ High purity, all above 98.5%, no impurities after dissolution ♦ We will test each batch to ensure quality ♦ OEM and private brand services designed for free ♦ Various cap colors available ♦ W

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one CAS25796-77-4

Cas:25796-77-4

Min.Order:1 Kilogram

FOB Price: $7.0 / 9.0

Type:Trading Company

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Henan Sinotech Import&Export Corporation

Name: Cyclopenta[2,1-b;3,4-b']dithiophen-4-one Synonyms: 4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one CAS: 25796-77-4 MF: C9H4OS2 Appearance: white powder Storage:Store in cool and dry place, away from sun light. Package: 25kgs/drum

Cyclopenta[2,1-b;3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Other

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Hubei Langyou International Trading Co., Ltd

1. Guaranteed purity; 2. Large quantity in stock; 3. Largest manufacturer; 4. Best service after shipment with email; 5. High quality & competitive price; Appearance:White Powder Storage:Store in sealed containers at cool & dr

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one CAS 25796-77-4

Cas:25796-77-4

Min.Order:100 Gram

Negotiable

Type:Other

inquiry

Shijiazhuang Sdyano Fine Chemical Co., Ltd

1. Best prices with satisfied quality; 2. It's clients' right to choose the package's Courier (EMS, DHL, FedEx, UPS); 3.It's clients' right to choose the packing way for his produccts from many recent effective packing ways;

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0 Metric Ton

Negotiable

Type:Trading Company

inquiry

Qingdao Beluga Import and Export Co., LTD

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one CAS:25796-77-4 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one CAS:25796-77-4

Cas:25796-77-4

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Shandong Hanjiang Chemical Co., Ltd.

Hello, dear friend! I'm Hansen and Allen from China. Welcome to my lookchem mall! The following is a brief introduction of our company's products and services. If you are interested in our products, please contact us by emai

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Henan Wentao Chemical Product Co., Ltd.

Henan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod

CAS NO.:25796-77-4

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Xiamen Hisunny Chemical Co.,Ltd

Best quality & Attractive price & Professional service; Trial & Pilot & Commercial Hisunny Chemical is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality intermediates, specia

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Hangzhou J&H Chemical Co., Ltd.

J&H CHEM R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. J&H CHEM has some Manufacturing base in Jia

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

SHANGHAI T&W PHARMACEUTICAL CO., LTD.

A substitute for perfluorooctanoic acid, mainly used as a surfactant, dispersant, additive, etc Appearance:White solid or Colorless liquid Purity:99.3 % We will ship the goods in a timely manner as required We can provide relevant documents acc

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:4 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Zibo Hangyu Biotechnology Development Co., Ltd

Zibo Hangyu Biotechnology Development Co., Ltd is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemi

cas:25796-77-4

Cas:25796-77-4

Min.Order:10 Gram

Negotiable

Type:Lab/Research institutions

inquiry

YUNBIO TECH CO.,LTD

Our Strength: -Flexible: We work in small teams with rapid communication channels. Respond quickly and efficiently to customer and market needs. -Innovative: We are focusing on the development of new products and keep close relationships with

Zibo Dorne chemical technology co. LTD

Product Details Grade: pharmaceutical grade Purity:99%+ ProductionCapacity: 1000 Kilogram/Month Scope of use: For scientific research only(The product must be used legally) Our Advantage 1. Best quality with competitive price. 2. Quick shipping,

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Shanghai Minstar Chemical Co., Ltd

Product Name: 4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one Synonyms: 4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one;3,4-b']dithiophen-4-one;Cyclopenta[2,1-b;4H-Cyclopenta-[2,1-b:3,4-b']dithiophene-4-one;4H-Cyclopenta[1,2-b:5,4-b&#39

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Huarong Pharm Co., Ltd.

We Huarong Pharm can provide Customized Synthesis & Process R&D & APIs and intermediates Production & Quality Research & Registration Application, especially our GMP validation service which complies with SFDA, FDA, WHO and EU EMPA. O

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Shandong Mopai Biotechnology Co., LTD

Shandong Mopai Biotechnology Co., LTD is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemicals. W

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

SAGECHEM LIMITED

SAGECHEM is a chemical R&D, manufacturing and distribution company in China since 2009, including pharmaceutical intermediates, agrochemical, dyestuff intermediates, organosilicone, API and etc. We also offer a full range of services in custom synthe

SAGECHEM/4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Suzhou Health Chemicals Co., Ltd.

High quality,stable supply chain.Appearance:white/off-white or light yellow Storage:Store in cool and dry place, keep away from strong light and heat. Package:aluminum bottle,glass bottle,PTFE bottle,cardboard drum Application:This product can be use

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Win-Win chemical Co.Ltd

Stock products, own laboratory Package:Grams, Kilograms Application:For R&D Transportation:According to customer request Port:Shanghai

4H-Cyclopenta[2,1-b:3,4-b]dithiophen-4-one cas no. 25796-77-4 98%

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

GIHI CHEMICALS CO.,LIMITED

Lower price, sample is available,SDS test documents are available,large stock in warehouseAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:Fine chemical intermediates, used as the main raw material for the synthe

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Henan Allgreen Chemical Co.,Ltd

high quality Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea

4H-Cyclopenta[1,2-b:5,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Aecochem Corp.

Our clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS

4H-Cyclopenta[2,1-B:3,4-B']Dithiophen-4-One

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Suzhou SuKaiLu Chemical Technology Co., Ltd.

Our Company main product 一:suzuki reaction customization 二:Boronic acid derivative ①:phenylboronic acid derivative ②:Phenylboronic acid pinacol ester derivative ③:Potassium phenyltrifluoroborate derivative ④:Phenylboronic acid MIDA ester derivative

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

inquiry

Antimex Chemical Limied

Ansciep Chemical is a professional enterprise manufacturing and distributing fine chemicals and speciality chemicals. We have been dedicated to heterocycle compounds and phenyl rings for tens of years. This is our mature product for export. Our quali

4H-Cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Ocean Chemical Co., Ltd.

★.Best quality according to requirement ★.Competitive price in China market ★.Mature Technical support ★.Professional logistic support

Cyclopenta[2,1-b;3,4-b']dithiophen-4-one

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

HANGZHOU TIANYE CHEMICALS CO., LTD.

"HANGZHOU TIANYE CHEMICALS Co.LTD , Located in Eastern Science and Innovation Park Hangzhou .We are a high-tech enterprise specialized in technical research and development, production, development and trade of chemical products. We supply Multiple s

4H-Δ4,4'-dicyclopenta[2,1-b:3,4-b’]dithiophen-4-one

Cas:25796-77-4

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Synthetic route

bis(2-iodo-3-thienyl)methanone
474416-61-0

bis(2-iodo-3-thienyl)methanone

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
With copper In N,N-dimethyl-formamide Reflux;99%
With copper In N,N-dimethyl-formamide for 15h; Ullmann reaction; Reflux;95%
With copper In N,N-dimethyl-formamide for 15h; Ullmann coupling reaction; Heating;90%
2,6-bis(trimethylsilyl)-4H-cyclopenta[2,1-b:3,4-b′]dithiophen-4-one
1187970-48-4

2,6-bis(trimethylsilyl)-4H-cyclopenta[2,1-b:3,4-b′]dithiophen-4-one

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
With trifluoroacetic acid In chloroform at 20℃; for 1h;95%
spiro[4H-cyclopenta[2,1-b;3,4-b']-dithiophene-4,2'-[1,3]dioxolan]
156547-71-6

spiro[4H-cyclopenta[2,1-b;3,4-b']-dithiophene-4,2'-[1,3]dioxolan]

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
With hydrogenchloride Hydrolysis;91%
3,3'dibromo-2,2'-bithiophene
51751-44-1

3,3'dibromo-2,2'-bithiophene

N,N-Dimethylcarbamoyl chloride
79-44-7

N,N-Dimethylcarbamoyl chloride

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Stage #1: 3,3'dibromo-2,2'-bithiophene With n-butyllithium In diethyl ether; hexane at -78℃; for 2h; Inert atmosphere;
Stage #2: N,N-Dimethylcarbamoyl chloride In diethyl ether; hexane at -78 - 20℃; Inert atmosphere;
79%
Stage #1: 3,3'dibromo-2,2'-bithiophene With n-butyllithium In diethyl ether at -78℃; for 1h; Inert atmosphere;
Stage #2: N,N-Dimethylcarbamoyl chloride In diethyl ether at -78 - 20℃; Inert atmosphere;
76%
Stage #1: 3,3'dibromo-2,2'-bithiophene With n-butyllithium In diethyl ether; hexane at -70℃; for 1h; Inert atmosphere;
Stage #2: N,N-Dimethylcarbamoyl chloride In diethyl ether; hexane for 3h; Inert atmosphere;
75.1%
Stage #1: 3,3'dibromo-2,2'-bithiophene With n-butyllithium In diethyl ether at -78℃; for 2h;
Stage #2: N,N-Dimethylcarbamoyl chloride In diethyl ether at 20℃;
68%
Stage #1: 3,3'dibromo-2,2'-bithiophene With n-butyllithium In tetrahydrofuran; hexane at -78℃; for 0.5h; Schlenk technique; Inert atmosphere;
Stage #2: N,N-Dimethylcarbamoyl chloride In tetrahydrofuran; hexane at -78 - 0℃; for 3h; Schlenk technique; Inert atmosphere;
58%
2,3-thiophenedicarboxylic acid anhydride
6007-83-6

2,3-thiophenedicarboxylic acid anhydride

A

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

B

4,8-dihydrobenzo[1,2-b:4,5-b']dithiophene-4,8-dione
32281-36-0

4,8-dihydrobenzo[1,2-b:4,5-b']dithiophene-4,8-dione

Conditions
ConditionsYield
at 500℃; under 1 - 5 Torr;A 1.2%
B n/a
3-thiophene carboxaldehyde
498-62-4

3-thiophene carboxaldehyde

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 94 percent / PCC / CH2Cl2 / 12 h / 20 °C
2: 90 percent / Cu / dimethylformamide / 15 h / Heating
View Scheme
Multi-step reaction with 4 steps
1.1: n-butyllithium / diethyl ether; hexane / 0.5 h / -78 °C
1.2: -78 - 20 °C
2.1: n-butyllithium / diethyl ether; hexane / 0.5 h / -78 °C
2.2: -78 - 20 °C
3.1: pyridinium chlorochromate / dichloromethane / 12 h / 20 °C
4.1: copper / N,N-dimethyl-formamide / 15 h / Reflux
View Scheme
Multi-step reaction with 4 steps
1.1: n-butyllithium / diethyl ether / -78 °C
1.2: -78 - 20 °C
2.1: n-butyllithium / diethyl ether / -23 - 20 °C
2.2: -23 - 20 °C
3.1: pyridinium chlorochromate / 1,2-dichloro-ethane / 80 °C
4.1: copper / N,N-dimethyl-formamide / Reflux
View Scheme
bis(2-iodothiophen-3-yl)methanol
474416-59-6

bis(2-iodothiophen-3-yl)methanol

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 94 percent / PCC / CH2Cl2 / 12 h / 20 °C
2: 90 percent / Cu / dimethylformamide / 15 h / Heating
View Scheme
Multi-step reaction with 2 steps
1: pyridinium chlorochromate / dichloromethane / 12 h / 20 °C
2: copper / N,N-dimethyl-formamide / 15 h / Reflux
View Scheme
Multi-step reaction with 2 steps
1: pyridinium chlorochromate / 1,2-dichloro-ethane / 80 °C
2: copper / N,N-dimethyl-formamide / Reflux
View Scheme
Multi-step reaction with 2 steps
1: pyridinium chlorochromate / dichloromethane / 10 h / 25 °C
2: copper / N,N-dimethyl-formamide / 4 h / 120 °C / Inert atmosphere
View Scheme
Multi-step reaction with 2 steps
1: pyridinium chlorochromate / dichloromethane / 10 h / 25 °C
2: copper / N,N-dimethyl-formamide / 4 h / 120 °C / Inert atmosphere
View Scheme
di(thiophen-3-yl)methanone
26453-81-6

di(thiophen-3-yl)methanone

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: 66 percent / TMSOTf / CH2Cl2 / 3 h / 20 °C
2.1: n-BuLi; I2
2.2: 90 percent / Cu / dimethylformamide / 15 h / Heating
3.1: 91 percent / aq. HCl
View Scheme
2,2-Di(3-thienyl)-1,3-dioxolane
19690-72-3

2,2-Di(3-thienyl)-1,3-dioxolane

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: n-BuLi; I2
1.2: 90 percent / Cu / dimethylformamide / 15 h / Heating
2.1: 91 percent / aq. HCl
View Scheme
thiophene-2,3-dicarboxylic acid
1451-95-2

thiophene-2,3-dicarboxylic acid

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 99.7 percent / acetic anhydride / 2 h / Heating
2: 1.2 percent / 500 °C / 1 - 5 Torr
View Scheme
1,1-di(thien-3-yl)-methanol
31936-92-2

1,1-di(thien-3-yl)-methanol

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: n-butyllithium / diethyl ether; hexane / 0.5 h / -78 °C
1.2: -78 - 20 °C
2.1: pyridinium chlorochromate / dichloromethane / 12 h / 20 °C
3.1: copper / N,N-dimethyl-formamide / 15 h / Reflux
View Scheme
Multi-step reaction with 3 steps
1.1: n-butyllithium / diethyl ether / -23 - 20 °C
1.2: -23 - 20 °C
2.1: pyridinium chlorochromate / 1,2-dichloro-ethane / 80 °C
3.1: copper / N,N-dimethyl-formamide / Reflux
View Scheme
3-bromo-[2,2’]bithiophenyl
19690-69-8

3-bromo-[2,2’]bithiophenyl

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: acetic acid; N-Bromosuccinimide / chloroform / 20 h / 20 - 50 °C
2.1: n-butyllithium / diethyl ether / Inert atmosphere
2.2: Inert atmosphere
3.1: n-butyllithium / hexane; tetrahydrofuran / -60 - -30 °C / Inert atmosphere
3.2: -30 - 0 °C / Inert atmosphere
4.1: trifluoroacetic acid / chloroform / 1 h / 20 °C
View Scheme
3,3'-dibromo-5,5'-bis(trimethylsilyl)-2,2'-bithiophene
207742-50-5

3,3'-dibromo-5,5'-bis(trimethylsilyl)-2,2'-bithiophene

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: n-butyllithium / hexane; tetrahydrofuran / -60 - -30 °C / Inert atmosphere
1.2: -30 - 0 °C / Inert atmosphere
2.1: trifluoroacetic acid / chloroform / 1 h / 20 °C
View Scheme
3,3',5,5'-tetrabromo-2,2'-bithiophene
125143-53-5

3,3',5,5'-tetrabromo-2,2'-bithiophene

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: n-butyllithium / diethyl ether / Inert atmosphere
1.2: Inert atmosphere
2.1: n-butyllithium / hexane; tetrahydrofuran / -60 - -30 °C / Inert atmosphere
2.2: -30 - 0 °C / Inert atmosphere
3.1: trifluoroacetic acid / chloroform / 1 h / 20 °C
View Scheme
Multi-step reaction with 2 steps
1.1: zinc; acetic acid; hydrogenchloride / ethanol; water / 3 h / 70 °C / Inert atmosphere
2.1: n-butyllithium / diethyl ether; hexane / 1 h / -70 °C / Inert atmosphere
2.2: 3 h / Inert atmosphere
View Scheme
[2,2'-bithiophene]-3-carboxylic acid
19783-52-9

[2,2'-bithiophene]-3-carboxylic acid

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: thionyl chloride; N,N-dimethyl-formamide / 12 h / 20 °C / Reflux
2: aluminum (III) chloride / dichloromethane / 4 h / 0 - 20 °C / Inert atmosphere
View Scheme
Stage #1: [2,2'-bithiophene]-3-carboxylic acid With thionyl chloride In N,N-dimethyl-formamide for 12h; Reflux;
Stage #2: With aluminum (III) chloride In dichloromethane at 0 - 20℃; for 9h;
20.7 mg
3-Thiophene carboxylic acid
88-13-1

3-Thiophene carboxylic acid

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; dipotassium hydrogenphosphate; silver(l) oxide / tert-butyl alcohol / 24 h / 130 °C / Schlenk technique; Inert atmosphere
2: thionyl chloride; N,N-dimethyl-formamide / 12 h / 20 °C / Reflux
3: aluminum (III) chloride / dichloromethane / 4 h / 0 - 20 °C / Inert atmosphere
View Scheme
Multi-step reaction with 2 steps
1.1: dipotassium hydrogenphosphate; dichloro(pentamethylcyclopentadienyl)rhodium (III) dimer; silver(l) oxide / tert-butyl alcohol / 24 h / 20 - 130 °C / Inert atmosphere
2.1: thionyl chloride / N,N-dimethyl-formamide / 12 h / Reflux
2.2: 9 h / 0 - 20 °C
View Scheme
C9H5ClOS2

C9H5ClOS2

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

Conditions
ConditionsYield
With aluminum (III) chloride In dichloromethane at 0 - 20℃; for 4h; Inert atmosphere;20.5 mg
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

dimethyl 4,5-bis(methylthio)-1,3-dithiole phosphonate ester
138519-02-5

dimethyl 4,5-bis(methylthio)-1,3-dithiole phosphonate ester

4-(4,5-Bis-methylsulfanyl-[1,3]dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophene
143736-76-9

4-(4,5-Bis-methylsulfanyl-[1,3]dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophene

Conditions
ConditionsYield
With n-butyllithium In tetrahydrofuran98%
With n-butyllithium In tetrahydrofuran; hexane 1.) -78 deg C, 15 min; 2.) 20 min;98%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

S,S'-(2-(dimethoxyphosphoryl)-1,3-dithiole-4,5-diyl)dihexanethiol

S,S'-(2-(dimethoxyphosphoryl)-1,3-dithiole-4,5-diyl)dihexanethiol

4-(4,5-Bis-hexylsulfanyl-[1,3]dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophene
143736-84-9

4-(4,5-Bis-hexylsulfanyl-[1,3]dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophene

Conditions
ConditionsYield
With n-butyllithium In tetrahydrofuran96%
With n-butyllithium In tetrahydrofuran; hexane 1.) -78 deg C, 15 min; 2.) 20 min;96%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

2,6-dibromo-4H-cyclopenta[2,1-b:3,4-b′]dithiophen-4-one

2,6-dibromo-4H-cyclopenta[2,1-b:3,4-b′]dithiophen-4-one

Conditions
ConditionsYield
With N-Bromosuccinimide; acetic acid at 20℃;96%
With N-Bromosuccinimide In N,N-dimethyl-formamide at 25℃;94%
With bromine In dichloromethane at 20℃; for 2h; Inert atmosphere;87.1%
With N-Bromosuccinimide In N,N-dimethyl-formamide at 20℃; for 0.166667h;
With N-Bromosuccinimide In tetrahydrofuran at 0℃; for 2.25h; Inert atmosphere;17.3 g
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

malononitrile
109-77-3

malononitrile

4-dicyanomethylene-4H-cyclopenta<2,1-b;3,4-b'>dithiophene
138050-21-2

4-dicyanomethylene-4H-cyclopenta<2,1-b;3,4-b'>dithiophene

Conditions
ConditionsYield
With piperidine93%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

2-(dimethoxyphosphoryl)-[1,3]dithiole-4,5-dicarboxylic acid dimethyl ester
148192-05-6

2-(dimethoxyphosphoryl)-[1,3]dithiole-4,5-dicarboxylic acid dimethyl ester

2-Cyclopenta[2,1-b;3,4-b']dithiophen-4-ylidene-[1,3]dithiole-4,5-dicarboxylic acid dimethyl ester
143736-80-5

2-Cyclopenta[2,1-b;3,4-b']dithiophen-4-ylidene-[1,3]dithiole-4,5-dicarboxylic acid dimethyl ester

Conditions
ConditionsYield
With n-butyllithium In tetrahydrofuran; hexane 1.) -78 deg C, 15 min; 2.) 20 min;91%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

N,N-dimethyl-formamide
68-12-2, 33513-42-7

N,N-dimethyl-formamide

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one-2-carbaldehyde
1376711-77-1

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one-2-carbaldehyde

Conditions
ConditionsYield
With trichlorophosphate In 1,2-dichloro-ethane at 0 - 80℃; for 6h;91%
With trichlorophosphate In dichloromethane at 0 - 80℃; for 6h;91%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

dimethyl 1,3-benzodithiol-2-ylphosphonate
62217-35-0

dimethyl 1,3-benzodithiol-2-ylphosphonate

4-Benzo[1,3]dithiol-2-ylidene-4H-cyclopenta[2,1-b;3,4-b']dithiophene
143736-74-7

4-Benzo[1,3]dithiol-2-ylidene-4H-cyclopenta[2,1-b;3,4-b']dithiophene

Conditions
ConditionsYield
With n-butyllithium In tetrahydrofuran89%
With n-butyllithium In tetrahydrofuran; hexane 1.) -78 deg C, 15 min; 2.) 20 min;89%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

4H-cyclopenta[2,1-b;3,4-b']dithiophene
389-58-2

4H-cyclopenta[2,1-b;3,4-b']dithiophene

Conditions
ConditionsYield
With hydrazine hydrate; potassium hydroxide In ethylene glycol at 180℃;89%
With hydrazine hydrate; potassium hydroxide In ethylene glycol at 200℃; for 2h; Inert atmosphere;67%
With potassium hydroxide; hydrazine In ethylene glycol at 190℃; for 13h;66%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

ethane-1,2-dithiol
540-63-6

ethane-1,2-dithiol

C11H8S4
164727-17-7

C11H8S4

Conditions
ConditionsYield
With aluminium trichloride In 1,2-dichloro-ethane at 20℃; for 1h;89%
With aluminum (III) chloride In 1,2-dichloro-ethane at 20℃;
With aluminum (III) chloride In chloroform at 25℃; Inert atmosphere;
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

3-bromo-[2,2’]bithiophenyl
19690-69-8

3-bromo-[2,2’]bithiophenyl

4-(2,2’-bithiophen-3-yl)-4-hydroxycyclopenta[2,1-b;3,4-b’]dithiophene
1500083-89-5

4-(2,2’-bithiophen-3-yl)-4-hydroxycyclopenta[2,1-b;3,4-b’]dithiophene

Conditions
ConditionsYield
Stage #1: 3-bromo-[2,2’]bithiophenyl With n-butyllithium In diethyl ether; hexane at -78℃; for 1h; Inert atmosphere;
Stage #2: 4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one In diethyl ether; hexane at -78 - 20℃; for 6h; Inert atmosphere;
88%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

2,6-di-iodo-cyclopenta[1,t2-b:5,4-b’]dithiophen-4-one
1222450-34-1

2,6-di-iodo-cyclopenta[1,t2-b:5,4-b’]dithiophen-4-one

Conditions
ConditionsYield
With N-iodo-succinimide; trifluoroacetic acid In acetonitrile at 20℃;88%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

1-bromo-4-octyloxybenzene
96693-05-9

1-bromo-4-octyloxybenzene

4-(4-(octyloxy)phenyl)-4H-cyclopenta[1,2-B:5,4-B']dithiophen-4-ol

4-(4-(octyloxy)phenyl)-4H-cyclopenta[1,2-B:5,4-B']dithiophen-4-ol

Conditions
ConditionsYield
With magnesium In tetrahydrofuran at 50℃; for 18h; Inert atmosphere;85%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

2-Bromobiphenyl
2052-07-5

2-Bromobiphenyl

4-(Biphenyl-2-yl)-4-hydroxy-4H-cyclopenta[2,1-b:3,4-b']dithiophene
350031-83-3

4-(Biphenyl-2-yl)-4-hydroxy-4H-cyclopenta[2,1-b:3,4-b']dithiophene

Conditions
ConditionsYield
Stage #1: 2-Bromobiphenyl With n-butyllithium In hexane for 1h; Heating;
Stage #2: 4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one In tetrahydrofuran; hexane at -70℃; for 1h; Further stages.;
83%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

C9H3BrOS2

C9H3BrOS2

Conditions
ConditionsYield
With bromine In dichloromethane at 20℃; for 2h; Inert atmosphere;82.9%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

10-(dicyanomethylidene)-9(10H)-anthrone hydrazone
156755-16-7

10-(dicyanomethylidene)-9(10H)-anthrone hydrazone

2-[10-(cyclopenta[2,1-b;3,4-b']dithiophen-4-ylidene-hydrazono)-10H-anthracen-9-ylidene]-malononitrile

2-[10-(cyclopenta[2,1-b;3,4-b']dithiophen-4-ylidene-hydrazono)-10H-anthracen-9-ylidene]-malononitrile

Conditions
ConditionsYield
With pyridinium p-toluenesulfonate acidic;80%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

(2-ethylhexyl)triphenylphosphonium bromide

(2-ethylhexyl)triphenylphosphonium bromide

4-(2′-ethylhexylidene)-4H-cyclopenta[2,1-b:3,4-b′]-dithiophene
1523510-31-7

4-(2′-ethylhexylidene)-4H-cyclopenta[2,1-b:3,4-b′]-dithiophene

Conditions
ConditionsYield
Stage #1: (2-ethylhexyl)triphenylphosphonium bromide With n-butyllithium In tetrahydrofuran; hexane at -82℃; Inert atmosphere;
Stage #2: 4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one In tetrahydrofuran; hexane at -82℃; for 0.5h;
79%
Stage #1: (2-ethylhexyl)triphenylphosphonium bromide With n-butyllithium In tetrahydrofuran at -78℃; Inert atmosphere;
Stage #2: 4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one In tetrahydrofuran; diethyl ether at -78 - 20℃; Inert atmosphere;
77%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

dimethyl [4,5-bis(butylthio)-1,3-dithiol-2-yl]phosphonate

dimethyl [4,5-bis(butylthio)-1,3-dithiol-2-yl]phosphonate

4-(4,5-Bis-butylsulfanyl-[1,3]dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophene
143736-82-7

4-(4,5-Bis-butylsulfanyl-[1,3]dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophene

Conditions
ConditionsYield
With n-butyllithium In tetrahydrofuran78%
With n-butyllithium In tetrahydrofuran; hexane 1.) -78 deg C, 15 min; 2.) 20 min;78%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

10-hydrazono-9,10-dihydroanthracen-9-one
3166-13-0

10-hydrazono-9,10-dihydroanthracen-9-one

10-(cyclopenta[2,1-b;3,4-b']dithiophen-4-ylidene-hydrazono)-10H-anthracen-9-one

10-(cyclopenta[2,1-b;3,4-b']dithiophen-4-ylidene-hydrazono)-10H-anthracen-9-one

Conditions
ConditionsYield
With pyridinium p-toluenesulfonate76%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

benzyl bromide
100-39-0

benzyl bromide

C16H10S2

C16H10S2

Conditions
ConditionsYield
Stage #1: benzyl bromide With triphenylphosphine
Stage #2: 4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one With sodium ethanolate Wittig Olefination;
76%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

n-octyltriphenylphosphoniumbromide
42036-78-2

n-octyltriphenylphosphoniumbromide

4-(octylidene)-4H-cyclopenta[2,1-b:3,4-b′]dithiophene
1523510-28-2

4-(octylidene)-4H-cyclopenta[2,1-b:3,4-b′]dithiophene

Conditions
ConditionsYield
Stage #1: n-octyltriphenylphosphoniumbromide With n-butyllithium In tetrahydrofuran; hexane at -82℃; Inert atmosphere;
Stage #2: 4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one In tetrahydrofuran; hexane at -82℃; for 0.5h;
74%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

2-dimethoxyphosphinyl-4,5-dimethyl-1,3-dithiole
69212-98-2

2-dimethoxyphosphinyl-4,5-dimethyl-1,3-dithiole

4-(4,5-Dimethyl-[1,3]dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophene
143736-78-1

4-(4,5-Dimethyl-[1,3]dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophene

Conditions
ConditionsYield
With n-butyllithium In tetrahydrofuran71%
With n-butyllithium In tetrahydrofuran; hexane 1.) -78 deg C, 15 min; 2.) 20 min;71%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

1-bromo-4-octylbenzene
51554-93-9

1-bromo-4-octylbenzene

4-(4-octylphenyl)-4H-cyclopenta[1,2-B:5,4-B']dithiophen-4-ol

4-(4-octylphenyl)-4H-cyclopenta[1,2-B:5,4-B']dithiophen-4-ol

Conditions
ConditionsYield
With magnesium In tetrahydrofuran at 50℃; for 18h; Inert atmosphere;70%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

cyclopenta[2,1-b;3,4-b']dithiophen-4-ylidene-hydrazine

cyclopenta[2,1-b;3,4-b']dithiophen-4-ylidene-hydrazine

Conditions
ConditionsYield
With pyridinium p-toluenesulfonate; hydrazine68%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

dimethyl (1,3-dithiol-2-yl)phosphonate
133113-76-5

dimethyl (1,3-dithiol-2-yl)phosphonate

4-(1,3-Dithiol-2-ylidene)-4H-cyclopenta<2,1-b;3,4-b'>dithiophene
143693-14-5

4-(1,3-Dithiol-2-ylidene)-4H-cyclopenta<2,1-b;3,4-b'>dithiophene

Conditions
ConditionsYield
With n-butyllithium In tetrahydrofuran65%
With n-butyllithium In tetrahydrofuran; hexane 1.) -78 deg C, 15 min; 2.) 20 min;65%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

dimethyl 4,5-bis(decylthio)-2H-1,3-dithiol-2-ylphosphonate
155442-43-6

dimethyl 4,5-bis(decylthio)-2H-1,3-dithiol-2-ylphosphonate

4-(4,5-Bis-decylsulfanyl-[1,3]dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophene
143736-86-1

4-(4,5-Bis-decylsulfanyl-[1,3]dithiol-2-ylidene)-4H-cyclopenta[2,1-b;3,4-b']dithiophene

Conditions
ConditionsYield
With n-butyllithium In tetrahydrofuran64%
With n-butyllithium In tetrahydrofuran; hexane 1.) -78 deg C, 15 min; 2.) 20 min;64%
4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one
25796-77-4

4H-cyclopenta[2,1-b:3,4-b']dithiophen-4-one

2,3,5,6-tetrabromo-4H-cyclopenta[2,1-b:3,4-b’]dithiophen-4-one

2,3,5,6-tetrabromo-4H-cyclopenta[2,1-b:3,4-b’]dithiophen-4-one

Conditions
ConditionsYield
With bromine In chloroform at 70℃; for 12h;63%
With bromine In chloroform for 12h; Reflux;63%

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