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Hangzhou ZeErRui Chemical Co., Ltd.

Product Name:3,6-dichloropyrazine-2-carbonitrile Synonym:2-Pyrazinecarbonitrile,3,6-dichloro;3,6-dichloro-2-pyrazinecarbonitrile Cas No:356783-16-9 Molecular Formula:C5HCl2N3 Molecular Weight:173.98754 Appearance:Little yellow powder HP

3,6-dichloropyrazine-2-carbonitrile 97% in stock

Cas:356783-16-9

Min.Order:10 Gram

Negotiable

Type:Lab/Research institutions

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Jinan Finer Chemical Co., Ltd

Product Description Product Name 3,6-Dichloro-2-pyrazinecarbonitrile CAS No. 356783-16-9 Appearance

3,6-Dichloro-2-pyrazinecarbonitrile

Cas:356783-16-9

Min.Order:1 Gram

FOB Price: $23.0

Type:Lab/Research institutions

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Hangzhou JINLAN Pharm-Drugs Technology Co., Ltd

Jinlan Pharm-Drugs Technology Co.,Limited (with its export company Hangzhou Royall Import & Export Co.,Ltd.)is located in Hangzhou, Zhejiang Province. Neighboring Ningbo port, Shanghai port, Hangzhou Xiaoshan Int’l Airport and Shanghai Pu

356783-16-9/3,6-dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

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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

High Quality 99% 356783-16-9? 3,6-dichloropyrazine-2-carbonitrile? Manufacturer

Cas:356783-16-9

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

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Dayang Chem (Hangzhou) Co.,Ltd.

Dayangchem's 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. DayangChem can provide different quantities

3,6-DICHLOROPYRAZINE-2-CARBONITRILE

Cas:356783-16-9

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

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Hebei Nengqian Chemical Import and Export Co., LTD

With our good experience, we offer detailed technical support and advice to assist customers. We communicate closely with customers to establish their quality requirements. Consistent Quality Our plant has strict quality control in each manufacturin

3, 6-Dichloropyrazine-2-Carbonitrile CAS 356783-16-9

Cas:356783-16-9

Min.Order:1 Kilogram

FOB Price: $1.0 / 10.0

Type:Trading Company

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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

Pharmaceutical Grade CAS 356783-16-9 with competitive price

Cas:356783-16-9

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Shanghai Upbio Tech Co.,Ltd

1.No Less 8 years exporting experience. Clients can 100% received goods 2.Lower Price with higher quality 3,Free sample 4,We are sincerely responsible for the "product quality" and "After Service" Upbio is Specialized

3,6-Dichloropyrazine-2-carbonitrile 356783-16-9

Cas:356783-16-9

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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Qingdao Beluga Import and Export Co., LTD

3,6-dichloropyrazine-2-carbonitrile CAS:356783-16-9 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing in high qua

3,6-dichloropyrazine-2-carbonitrile CAS:356783-16-9

Cas:356783-16-9

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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LIDE PHARMACEUTICALS LIMITED

Advantage : LIDE PHARMACEUTICALS LTD. is a mid-small manufacturing-type enterprise, engaged in pharmaceutical intermediates of R&D, custom-made and production, and also involving trading chemicals for export. We have established the R&amp

3,6-Dichloropyrazine-2-carbonitrile/ LIDE PHARMA- Factory supply / Best price

Cas:356783-16-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

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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

3,6-Dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Taizhou Crene Biotechnology co.ltd

Our company provides one-stop services of research - development - production for a variety of special prouducts. Not only do we make effective use of our strong technological strength, but also establish of cooperative relations with several well-

Favipiravir intermediate 356783-16-9

Cas:356783-16-9

Min.Order:100 Gram

Negotiable

Type:Lab/Research institutions

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Afine Chemicals Limited

Company Introduction 1. Established in 2005, with two independent business divisions: Fine chemicals division; Pharmaceutical division. 2. Main product: Optical brightener Textile auxiliary Dye stuff Pigments

3,6-DICHLOROPYRAZINE-2-CARBONITRILE

Cas:356783-16-9

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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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

3,6-Dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Shanghai Send Pharmaceutical Technology Co., Ltd.

low price high quality high purity good sevice stock Appearance:white Storage:Preserve In Well-Closed, Light-Resistant and Tight Containers. Store In Cool & Dry Place Package:1g,5g,10g...1kg,5kg...more Application:Pharmaceutical intermediat

3,6-dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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Shanghai Massive Chemical Technology Co., Ltd.

Massive Chemical is certified with ISO9001 and ISO14001 manufacturer for this product. We will offer all documents as requirement for the materials which includes, Certificate of Analysis, Material Safety Data Sheet, and Method of Analysis and

3,6-dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:1 Gram

FOB Price: $1.0

Type:Lab/Research institutions

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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

3,6-Dichloro-2-pyrazinecarbonitrile CAS NO.356783-16-9

Cas:356783-16-9

Min.Order:10 Gram

Negotiable

Type:Lab/Research institutions

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Hangzhou Lingrui Chemical Co.,Ltd.

3,6-dichloropyrazine-2-carbonitrile/ 356783-16-9/ 98% IN STOCKAppearance:White powder Storage:keep away from heat,sparks and flames Package:according to customers' requirements Application:Pharmaceutical intermediate Transportation:By air(EMS or EUB

3,6-dichloropyrazine-2-carbonitrile/ 356783-16-9/ 98% IN STOCK

Cas:356783-16-9

Min.Order:1 Gram

Negotiable

Type:Other

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Hebei Kunsui Technology Co., Ltd.

1. A strong scientific research team . 2. Stable quality (with a complete scientific research center and testing center to ensure the quality stability of each batch of products). 3. Rich export experience (with practical experience in exporting to m

Organic Intermediate 3,6-Dichloro-2-pyrazinecarbonitrile Powder CAS 356783-16-9

Cas:356783-16-9

Min.Order:1 Kilogram

FOB Price: $8.2 / 8.8

Type:Trading Company

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TaiChem Taizhou Limited

Established in May 2015, TaiChem Ltd. is initially invested by a British research and development company and started by PhDs back from aboard. The company is registered in China Medical City (CMC), Taizhou, Jiangsu Province, and the production site

3,6-dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:10 Gram

Negotiable

Type:Lab/Research institutions

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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,

2-Pyrazinecarbonitrile, 3,6-dichloro-

Cas:356783-16-9

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Jiangsu Qianyu Molecular Technology Co., LTD.

Our Advantages A. International Top level TechnologyOur company owned biomedicine experts are famous at home and abroad with rich experience in research and development in the field of efficient chiral functional molecules research and development an

Reliable Quality 3,6-Dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:0

Negotiable

Type:Trading Company

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HANGZHOU TIANYE CHEMICALS CO., LTD.

We product this chemical more than 10 years . We are very experience to export it to many countries, Our superior & stable quality , competitive price gain warm reception from our customers. Product Name:3,6-dichloropyrazine-2-carbonitrile CA

3,6-dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:1 Gram

Negotiable

Type:Trading Company

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Siwei Development Group Ltd.

Product name: 3,6-Dichloro-2-Pyrazinecarbonitrile CAS No.:356783-16-9 Molecule Formula:C5HCl2N3 Molecule Weight:173.99 Purity: 99.0% Package: 25kg/drum Description: Light yellow powder Manufacture Standards:Enterprise Standard

High Quality 3,6-Dichloro-2-Pyrazinecarbonitrile

Cas:356783-16-9

Min.Order:1 Kilogram

Negotiable

Type:Trading Company

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TAIZHOU ZHENYU BIOTECHNOLOGY CO., LTD

Zhenyu biotech exported this product to many countries and regions at best price. if you are looking for the material's manufacturer or supplier in china, zhenyu biotech is your best choice. pls contact with us freely for getting detailed

3,6-Dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:1 Kilogram

FOB Price: $2.0

Type:Lab/Research institutions

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

3,6-Dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:1 Gram

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

3,6-Dichloro-2-pyrazinecarbonitrile

Cas:356783-16-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Golden Pharma Co., Limited

GOLDEN PHARMA CO.,LIMITED.is a professional pharmaceutical company,our team have more than 20years expereince in pharmaceutical production and sales. we are a professional technical enterprise specializing in the R & D, production,QA regulation

3,6-Dichloropyrazine-2-carbonitrile

Cas:356783-16-9

Min.Order:1 Kilogram

Negotiable

Type:Other

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Win-Win chemical Co.Ltd

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

3,6-dichloropyrazine-2-carbonitrile Cas no.356783-16-9 98%

Cas:356783-16-9

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Bluecrystal chem-union

We are a Union of chemistry in China, consists of chemists,engineers, laboratories,factories in China. We organize surplus capacity of R&D and production as well as custom synthesis for chemical products and chemical business project. We are supp

3,6-dichloropyrazine-2-carbonitrile/ 356783-16-9/ 98% IN STOCK

Cas:356783-16-9

Min.Order:0

Negotiable

Type:Trading Company

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Synthetic route

3-hydroxy-6-nitropyrazine-2-carboxamide

3-hydroxy-6-nitropyrazine-2-carboxamide

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
With pyridine; trichlorophosphate at 20 - 80℃; for 8h; Reagent/catalyst;90%
3-hydroxy-6-bromopyrazine-2-carboxamide

3-hydroxy-6-bromopyrazine-2-carboxamide

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
Stage #1: 6-bromo-3-hydroxypyrazine-2-carboxamide With trichlorophosphate In chlorobenzene at 60℃; for 0.5h;
Stage #2: With N-ethyl-N,N-diisopropylamine In chlorobenzene at 90 - 100℃; for 2.66667h;
Stage #3: With sodium hydrogencarbonate In water; toluene
83%
With N-ethyl-N,N-diisopropylamine; trichlorophosphate In water at 60 - 100℃; for 8h; Solvent;70%
Stage #1: 6-bromo-3-hydroxypyrazine-2-carboxamide With trichlorophosphate at 70℃; for 0.25h;
Stage #2: With N-ethyl-N,N-diisopropylamine at 20 - 100℃; for 6h;
Stage #3: With water for 1h;
70%
Stage #1: 6-bromo-3-hydroxypyrazine-2-carboxamide With trichlorophosphate at 55℃; for 0.5h;
Stage #2: With N-ethyl-N,N-diisopropylamine at 110℃; for 5h;
43.7%
3,6-dichloropyrazine-2-carboxamide

3,6-dichloropyrazine-2-carboxamide

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine; trichlorophosphate at 75℃; for 1h;82%
6-chloro-3-aminopyrazine-2-carbonitrile
17231-50-4

6-chloro-3-aminopyrazine-2-carbonitrile

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
With tert.-butylnitrite; titanium tetrachloride In dichloromethane at 0 - 20℃; for 3h; Sandmeyer Reaction;81%
1,4-dioxopyrazinamide
18960-19-5

1,4-dioxopyrazinamide

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
Stage #1: 1,4-dioxopyrazinamide With trichlorophosphate In chlorobenzene at 50 - 70℃; for 1.83333h;
Stage #2: With pyridine In chlorobenzene at 110℃; for 8h; Temperature; Reagent/catalyst;
52.55%
Stage #1: 1,4-dioxopyrazinamide With trichlorophosphate at 50 - 70℃; for 1.83333h;
Stage #2: With triethylamine at 96℃; for 6h;
45.15%
2-hydroxypyrazine-3-carboxamide
55321-99-8

2-hydroxypyrazine-3-carboxamide

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: bromine / acetonitrile / 6 h / 0 - 40 °C
2.1: trichlorophosphate / chlorobenzene / 0.5 h / 60 °C
2.2: 2.67 h / 90 - 100 °C
View Scheme
Multi-step reaction with 2 steps
1.1: bromine; pyridine / N,N-dimethyl-formamide / 2 h / 80 - 85 °C / Inert atmosphere
2.1: trichlorophosphate / 0.5 h / 55 °C
2.2: 5 h / 110 °C
View Scheme
2-pyrazine carbonitrile
19847-12-2

2-pyrazine carbonitrile

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: acetic acid; dihydrogen peroxide / 22 h / -5 - 95 °C
2.1: trichlorophosphate / 1.83 h / 50 - 70 °C
2.2: 6 h / 96 °C
View Scheme
3-aminopyrazinoic acid
5424-01-1

3-aminopyrazinoic acid

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: sulfuric acid / 20 °C / Cooling with ice
2: N-Bromosuccinimide / acetonitrile / 20 °C
3: sulfuric acid; sodium nitrite / 2 h / -5 - 20 °C
4: ammonium hydroxide / 3 h / 20 °C
5: trichlorophosphate; N-ethyl-N,N-diisopropylamine / water / 8 h / 60 - 100 °C
View Scheme
Multi-step reaction with 5 steps
1.1: sulfuric acid / 48 h / Cooling with ice
2.1: N-Bromosuccinimide / acetonitrile / 24 h / 20 °C / Inert atmosphere
3.1: sulfuric acid; sodium nitrite / 2 h / -5 - 25 °C
3.2: 1.5 h
4.1: ammonium hydroxide / 3 h / 20 °C
5.1: trichlorophosphate / 0.25 h / 70 °C
5.2: 6 h / 20 - 100 °C
5.3: 1 h
View Scheme
Methyl 3-amino-2-pyrazinecarboxylate
16298-03-6

Methyl 3-amino-2-pyrazinecarboxylate

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: N-Bromosuccinimide / acetonitrile / 20 °C
2: sulfuric acid; sodium nitrite / 2 h / -5 - 20 °C
3: ammonium hydroxide / 3 h / 20 °C
4: trichlorophosphate; N-ethyl-N,N-diisopropylamine / water / 8 h / 60 - 100 °C
View Scheme
Multi-step reaction with 4 steps
1.1: N-Bromosuccinimide / acetonitrile / 24 h / 20 °C / Inert atmosphere
2.1: sulfuric acid; sodium nitrite / 2 h / -5 - 25 °C
2.2: 1.5 h
3.1: ammonium hydroxide / 3 h / 20 °C
4.1: trichlorophosphate / 0.25 h / 70 °C
4.2: 6 h / 20 - 100 °C
4.3: 1 h
View Scheme
methyl 3-amino-6-bromopyrazine-2-carboxylate
6966-01-4

methyl 3-amino-6-bromopyrazine-2-carboxylate

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: sulfuric acid; sodium nitrite / 2 h / -5 - 20 °C
2: ammonium hydroxide / 3 h / 20 °C
3: trichlorophosphate; N-ethyl-N,N-diisopropylamine / water / 8 h / 60 - 100 °C
View Scheme
Multi-step reaction with 3 steps
1.1: sulfuric acid; sodium nitrite / 2 h / -5 - 25 °C
1.2: 1.5 h
2.1: ammonium hydroxide / 3 h / 20 °C
3.1: trichlorophosphate / 0.25 h / 70 °C
3.2: 6 h / 20 - 100 °C
3.3: 1 h
View Scheme
3-hydroxy-6-bromopyrazine-2-carboxylic acid methyl ester
21874-61-3

3-hydroxy-6-bromopyrazine-2-carboxylic acid methyl ester

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: ammonium hydroxide / 3 h / 20 °C
2: trichlorophosphate; N-ethyl-N,N-diisopropylamine / water / 8 h / 60 - 100 °C
View Scheme
Multi-step reaction with 2 steps
1.1: ammonium hydroxide / 3 h / 20 °C
2.1: trichlorophosphate / 0.25 h / 70 °C
2.2: 6 h / 20 - 100 °C
2.3: 1 h
View Scheme
pyrazinamide
98-96-4

pyrazinamide

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: acetic acid; 3-chloro-benzenecarboperoxoic acid / ethyl acetate / 24 h / 0 - 20 °C
2.1: trichlorophosphate / chlorobenzene / 1.83 h / 50 - 70 °C
2.2: 8 h / 110 °C
View Scheme
2-hydroxy-5-bromopyrazine
374063-92-0

2-hydroxy-5-bromopyrazine

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

Conditions
ConditionsYield
Stage #1: 2-hydroxy-5-bromopyrazine With trichlorophosphate at 60℃; for 2h;
Stage #2: formamide With dipotassium peroxodisulfate; iron In water at 80 - 85℃; Further stages;
320 g
Reaxys ID: 36640215

Reaxys ID: 36640215

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
With potassium fluoride; tetrabutylammomium bromide In dimethyl sulfoxide; toluene at 60℃; for 2.5h;92.3%
With potassium fluoride In dimethyl sulfoxide at 60 - 90℃; Large scale;85%
With tetrabutyl ammonium fluoride; tetrabutylammomium bromide at 60℃; for 3h; Reagent/catalyst; Temperature; Solvent; Sealed tube;62.37%
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

6-chloro-3-hydroxylpyrazine-2-carbonitrile
1374986-27-2

6-chloro-3-hydroxylpyrazine-2-carbonitrile

Conditions
ConditionsYield
With tetrabutylammomium bromide; sodium hydroxide In dichloromethane at 20℃; for 3h;85%
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

4-methoxy-phenol
150-76-5

4-methoxy-phenol

6-chloro-3-(4-methoxyphenoxy)-2-pyrazinecarbonitrile
356783-22-7

6-chloro-3-(4-methoxyphenoxy)-2-pyrazinecarbonitrile

Conditions
ConditionsYield
With potassium carbonate In N-methyl-acetamide; water; ethyl acetate
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

thiophenol
108-98-5

thiophenol

6-chloro-3-(phenylsulfanyl)-2-pyrazinecarbonitrile
356783-25-0

6-chloro-3-(phenylsulfanyl)-2-pyrazinecarbonitrile

Conditions
ConditionsYield
With sodium chloride; potassium carbonate In water; ethyl acetate; N,N-dimethyl-formamide
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

4-Benzyloxyphenol
103-16-2

4-Benzyloxyphenol

3-[(4-(benzyloxy)phenoxy)]-6-chloro-2-pyrazinecarbonitrile
356783-23-8

3-[(4-(benzyloxy)phenoxy)]-6-chloro-2-pyrazinecarbonitrile

Conditions
ConditionsYield
With potassium carbonate In N-methyl-acetamide; di-isopropyl ether; water; ethyl acetate
2-Methylcyclopentane-1,3-dione
765-69-5

2-Methylcyclopentane-1,3-dione

3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

6-fluoro-3-[(2-methyl-3-oxo-1-cyclopenten-1-yl)oxy]-2pyrazinecarbonitrile
356783-61-4

6-fluoro-3-[(2-methyl-3-oxo-1-cyclopenten-1-yl)oxy]-2pyrazinecarbonitrile

Conditions
ConditionsYield
With potassium fluoride; triethylamine In water; dimethyl sulfoxide; ethyl acetate
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

favipiravir
259793-96-9

favipiravir

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: potassium fluoride; tetrabutylammomium bromide / toluene; dimethyl sulfoxide / 2.5 h / 60 °C
2.1: sodium acetate; water / toluene; dimethyl sulfoxide / 7 h / 50 °C
3.1: sulfuric acid / 4 h / 50 °C
3.2: 0.67 h / 3 - 10 °C
3.3: 0.75 h / 10 °C
View Scheme
Multi-step reaction with 3 steps
1: potassium fluoride; tetrabutylammomium bromide / dimethyl sulfoxide / 3 h / 55 °C / Sealed tube
2: dihydrogen peroxide / 2 h / 27 °C
3: sodium hydrogencarbonate; water / 8.5 h / 50 °C
View Scheme
Multi-step reaction with 3 steps
1: potassium fluoride; tetrabutylammomium bromide / toluene; dimethyl sulfoxide / 3 h / 55 °C
2: dihydrogen peroxide / toluene; dimethyl sulfoxide / 2 h / 27 °C / Cooling with ice
3: sodium hydrogencarbonate; water / 8.5 h / 50 °C
View Scheme
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

3,6-difluoro-2-pyrazinecarboxamide
356783-29-4

3,6-difluoro-2-pyrazinecarboxamide

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: potassium fluoride; tetrabutylammomium bromide / dimethyl sulfoxide / 3 h / 55 °C / Sealed tube
2: dihydrogen peroxide / 2 h / 27 °C
View Scheme
Multi-step reaction with 2 steps
1: potassium fluoride; tetrabutylammomium bromide / toluene; dimethyl sulfoxide / 3 h / 55 °C
2: dihydrogen peroxide / toluene; dimethyl sulfoxide / 2 h / 27 °C / Cooling with ice
View Scheme
Multi-step reaction with 2 steps
1: potassium fluoride dihydrate; tetrabutylammomium bromide / dimethyl sulfoxide / 3 h / 50 °C
2: potassium carbonate; dihydrogen peroxide / dimethyl sulfoxide; water / 1.5 h / 25 °C
View Scheme
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

6-fluoro-3-hydroxy-2-cyanopyrazine
356783-31-8

6-fluoro-3-hydroxy-2-cyanopyrazine

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: tetrabutyl ammonium fluoride; tetrabutylammomium bromide / 3 h / 60 °C / Sealed tube
2: sodium acetate; water / 1,4-dioxane / 7 h / 55 °C
View Scheme
Multi-step reaction with 2 steps
1: potassium fluoride / dimethyl sulfoxide / 60 - 90 °C / Large scale
2: sodium acetate; water / dimethyl sulfoxide / 4 h / 5 - 45 °C / Large scale
View Scheme
Stage #1: 3,6-dichloropyrazine-2-carbonitrile With potassium fluoride In N,N-dimethyl-formamide at 105 - 112℃;
Stage #2: With acetic acid; triethylamine In N,N-dimethyl-formamide at 0 - 15℃; for 1h;
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

ethyl (S)-2-(2-(3-amino-1-methyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-(tert-butoxy)acetate

ethyl (S)-2-(2-(3-amino-1-methyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-(tert-butoxy)acetate

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: toluene / 3 h / 0 °C
2: bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II); potassium propionate / 1,4-dioxane / 3 h / 85 °C / Inert atmosphere
3: potassium carbonate / 2 h / 70 °C
View Scheme
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

ethyl (S)-2-(2-(3-bromo-1-methyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-(tert-butoxy)acetate

ethyl (S)-2-(2-(3-bromo-1-methyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-(tert-butoxy)acetate

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: toluene / 3 h / 0 °C
2: bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II); potassium propionate / 1,4-dioxane / 3 h / 85 °C / Inert atmosphere
3: potassium carbonate / 2 h / 70 °C
4: copper(I) bromide; tert.-butylnitrite / acetonitrile / 3 h / 0 - 20 °C
View Scheme
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

tert-butyl (S)-4-(5-(6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-2-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-3-yl)-3,6-dihydropyridine-1(2H)carboxylate

tert-butyl (S)-4-(5-(6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-2-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-3-yl)-3,6-dihydropyridine-1(2H)carboxylate

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: toluene / 3 h / 0 °C
2: bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II); potassium propionate / 1,4-dioxane / 3 h / 85 °C / Inert atmosphere
3: potassium carbonate / 2 h / 70 °C
4: copper(I) bromide; tert.-butylnitrite / acetonitrile / 3 h / 0 - 20 °C
5: potassium carbonate; tetrakis(triphenylphosphine) palladium(0) / 1,4-dioxane / 5 h / 80 - 100 °C / Inert atmosphere
View Scheme
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

tert-butyl (S)-4-(5-(6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-2-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-3-yl)piperidine-1-carboxylate

tert-butyl (S)-4-(5-(6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-2-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-3-yl)piperidine-1-carboxylate

Conditions
ConditionsYield
Multi-step reaction with 6 steps
1: toluene / 3 h / 0 °C
2: bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II); potassium propionate / 1,4-dioxane / 3 h / 85 °C / Inert atmosphere
3: potassium carbonate / 2 h / 70 °C
4: copper(I) bromide; tert.-butylnitrite / acetonitrile / 3 h / 0 - 20 °C
5: potassium carbonate; tetrakis(triphenylphosphine) palladium(0) / 1,4-dioxane / 5 h / 80 - 100 °C / Inert atmosphere
6: hydrogen; Rh/Al2O3 / ethanol / 8 h
View Scheme
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

tert-butyl (S)-3-(4-(5-(6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-2-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-3-yl)piperidin-1-yl)azetidine-1-carboxylate

tert-butyl (S)-3-(4-(5-(6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-2-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-3-yl)piperidin-1-yl)azetidine-1-carboxylate

Conditions
ConditionsYield
Multi-step reaction with 8 steps
1: toluene / 3 h / 0 °C
2: bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II); potassium propionate / 1,4-dioxane / 3 h / 85 °C / Inert atmosphere
3: potassium carbonate / 2 h / 70 °C
4: copper(I) bromide; tert.-butylnitrite / acetonitrile / 3 h / 0 - 20 °C
5: potassium carbonate; tetrakis(triphenylphosphine) palladium(0) / 1,4-dioxane / 5 h / 80 - 100 °C / Inert atmosphere
6: hydrogen; Rh/Al2O3 / ethanol / 8 h
7: hydrogenchloride / isopropyl alcohol / 48 h / 20 °C
8: acetic acid; sodium cyanoborohydride / ethanol / 3 h
View Scheme
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

ethyl (S)-2-(2-(3-(1-(azetidin-3-yl)piperidin-4-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-(tert-butoxy)acetate

ethyl (S)-2-(2-(3-(1-(azetidin-3-yl)piperidin-4-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-(tert-butoxy)acetate

Conditions
ConditionsYield
Multi-step reaction with 9 steps
1: toluene / 3 h / 0 °C
2: bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II); potassium propionate / 1,4-dioxane / 3 h / 85 °C / Inert atmosphere
3: potassium carbonate / 2 h / 70 °C
4: copper(I) bromide; tert.-butylnitrite / acetonitrile / 3 h / 0 - 20 °C
5: potassium carbonate; tetrakis(triphenylphosphine) palladium(0) / 1,4-dioxane / 5 h / 80 - 100 °C / Inert atmosphere
6: hydrogen; Rh/Al2O3 / ethanol / 8 h
7: hydrogenchloride / isopropyl alcohol / 48 h / 20 °C
8: acetic acid; sodium cyanoborohydride / ethanol / 3 h
9: hydrogenchloride / isopropyl alcohol
View Scheme
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

methyl (S)-3-(4-(5-(6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-2-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-3-yl)piperidin-1-yl)azetidine-1-carboxylate

methyl (S)-3-(4-(5-(6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-2-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-3-yl)piperidin-1-yl)azetidine-1-carboxylate

Conditions
ConditionsYield
Multi-step reaction with 10 steps
1: toluene / 3 h / 0 °C
2: bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II); potassium propionate / 1,4-dioxane / 3 h / 85 °C / Inert atmosphere
3: potassium carbonate / 2 h / 70 °C
4: copper(I) bromide; tert.-butylnitrite / acetonitrile / 3 h / 0 - 20 °C
5: potassium carbonate; tetrakis(triphenylphosphine) palladium(0) / 1,4-dioxane / 5 h / 80 - 100 °C / Inert atmosphere
6: hydrogen; Rh/Al2O3 / ethanol / 8 h
7: hydrogenchloride / isopropyl alcohol / 48 h / 20 °C
8: acetic acid; sodium cyanoborohydride / ethanol / 3 h
9: hydrogenchloride / isopropyl alcohol
10: N-ethyl-N,N-diisopropylamine / dichloromethane / 1 h
View Scheme
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

(S)-2-(tert-butoxy)-2-(7-(4-chlorophenyl)-2-(3-(1-(1-(methoxycarbonyl)azetidin-3-yl)piperidin-4-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)-5-methylbenzo[d]thiazol-6-yl)acetic acid

(S)-2-(tert-butoxy)-2-(7-(4-chlorophenyl)-2-(3-(1-(1-(methoxycarbonyl)azetidin-3-yl)piperidin-4-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)-5-methylbenzo[d]thiazol-6-yl)acetic acid

Conditions
ConditionsYield
Multi-step reaction with 11 steps
1: toluene / 3 h / 0 °C
2: bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II); potassium propionate / 1,4-dioxane / 3 h / 85 °C / Inert atmosphere
3: potassium carbonate / 2 h / 70 °C
4: copper(I) bromide; tert.-butylnitrite / acetonitrile / 3 h / 0 - 20 °C
5: potassium carbonate; tetrakis(triphenylphosphine) palladium(0) / 1,4-dioxane / 5 h / 80 - 100 °C / Inert atmosphere
6: hydrogen; Rh/Al2O3 / ethanol / 8 h
7: hydrogenchloride / isopropyl alcohol / 48 h / 20 °C
8: acetic acid; sodium cyanoborohydride / ethanol / 3 h
9: hydrogenchloride / isopropyl alcohol
10: N-ethyl-N,N-diisopropylamine / dichloromethane / 1 h
11: methanol; sodium hydroxide / tetrahydrofuran / 2.5 h / 60 °C
View Scheme
3,6-dichloropyrazine-2-carbonitrile
356783-16-9

3,6-dichloropyrazine-2-carbonitrile

ethyl (S)-2-(2-(3-(1-(1-acetylazetidin-3-yl)piperidin-4-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-(tert-butoxy)acetate

ethyl (S)-2-(2-(3-(1-(1-acetylazetidin-3-yl)piperidin-4-yl)-1-methyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)-7-(4-chlorophenyl)-5-methylbenzo[d]thiazol-6-yl)-2-(tert-butoxy)acetate

Conditions
ConditionsYield
Multi-step reaction with 10 steps
1: toluene / 3 h / 0 °C
2: bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II); potassium propionate / 1,4-dioxane / 3 h / 85 °C / Inert atmosphere
3: potassium carbonate / 2 h / 70 °C
4: copper(I) bromide; tert.-butylnitrite / acetonitrile / 3 h / 0 - 20 °C
5: potassium carbonate; tetrakis(triphenylphosphine) palladium(0) / 1,4-dioxane / 5 h / 80 - 100 °C / Inert atmosphere
6: hydrogen; Rh/Al2O3 / ethanol / 8 h
7: hydrogenchloride / isopropyl alcohol / 48 h / 20 °C
8: acetic acid; sodium cyanoborohydride / ethanol / 3 h
9: hydrogenchloride / isopropyl alcohol
10: N-ethyl-N,N-diisopropylamine / dichloromethane / 1 h
View Scheme

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