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Hangzhou ZeErRui Chemical Co., Ltd.

Product Name:3,6-Difluoropyrazine-2-carbonitrile Synonym:2-Pyrazinecarbonitrile,3,6-difluoro;3,6-difluoro-2-pyrazinecarbonitrile Cas No:356783-28-3 Molecular Formula:C5HF2N3 Molecular Weight:141.0783464 Appearance:Little yellow powder a

3,6-Difluoropyrazine-2-carbonitrile 99% in stock

Cas:356783-28-3

Min.Order:10 Gram

Negotiable

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

356783-28-3/ 3,6-Difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

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AstaTech ( Chengdu) BioPharmaceutical Corp.

Chengdu AstaTech Chemical Technology Co., Ltd. is a wholly-owned subsidiary of AstaTech (Chengdu) BioPharmaceutical Co., Ltd. It has overall accountability for AstaTech’s product list and sales and promotion of chemical reagents in China. The company

3,6-Difluoro-2-pyrazinecarbonitrile

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Trading Company

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Dayang Chem (Hangzhou) Co.,Ltd.

DayangChem exported this product to many countries and regions at best price. If you are looking for the material's manufacturer or supplier in China, DayangChem is your best choice. Pls contact with us freely for getting detailed product spe

3,6-DIFLUOROPYRAZINE-2-CARBONITRILE

Cas:356783-28-3

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

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Hebei Nengqian Chemical Import and Export Co., LTD

Our advantages: 1. All inquiries will be replied within 12 hours. 2. Dedication to quality, supply & service. 3. Strictly on selecting raw materials. 4. Reasonable & competitive price, fast lead time. 5. Sample is available for your eva

3,6-difluoropyrazine-2-carbonitrile In stock

Cas:356783-28-3

Min.Order:1 Gram

FOB Price: $1000.0 / 1300.0

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

New arrival CAS 356783-28-3 with best price

Cas:356783-28-3

Min.Order:10 Gram

FOB Price: $146.0 / 176.0

Type:Trading Company

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Shandong Hanjiang Chemical Co., Ltd.

Product Name:3,6-Difluoropyrazine-2-carbonitrile Synonym:2-Pyrazinecarbonitrile,3,6-difluoro;3,6-difluoro-2-pyrazinecarbonitrile Cas No:356783-28-3 Molecular Formula:C5HF2N3 Molecular Weight:141.0783464 Appearance:Little yellow powder a

356783-28-3 3,6-difluoro-2-pyrazinecarbonitrile

Cas:356783-28-3

Min.Order:1 Kilogram

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-Difluoropyrazine-2-carbonitrile/ LIDE PHARMA- Factory supply / Best price

Cas:356783-28-3

Min.Order:0

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-DIFLUOROPYRAZINE-2-CARBONITRILE

Cas:356783-28-3

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-Difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:0

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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-Difluoropyrazine-2-carbonitrile

Cas:356783-28-3

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-difluoro-

Cas:356783-28-3

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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Henan Wentao Chemical Product Co., Ltd.

We are leading fine chemicals supplier in China and we had established stable business relationships with Samsung,LG,Merck,Thermo Fisher Scientific and so on.Our main business covers the fields below: 1.Noble Metal Catalysts (Pt.Pd...)

3,6-difluoropyrazine-2-carbonitrileCAS NO.: 356783-28-3

Cas:356783-28-3

Min.Order:1 Kilogram

FOB Price: $5.0

Type:Lab/Research institutions

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Siwei Development Group Ltd.

Product name: 3,6-Difluoro-2-Pyrazinecarbonitrile CAS No.:356783-28-3 Molecule Formula:C5HF2N3 Molecule Weight:141.08 Purity: 99.0% Package: 25kg/drum Description: Light yellow powder Manufacture Standards:Enterprise Standard

High Quality 3,6-Difluoro-2-Pyrazinecarbonitrile

Cas:356783-28-3

Min.Order:1 Kilogram

Negotiable

Type:Trading Company

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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-Difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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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-Difluoro-2-pyrazinecarbonitrile

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

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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-difluoro-2-pyrazinecarbonitrile

Cas:356783-28-3

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-difluoropyrazine-2-carbonitrile Cas no.356783-28-3 98%

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Hunan chemfish Pharmaceutical co.,Ltd

Hunan chemfish Pharmaceutical co.,Ltd.located in Lugu High-tech industral park ,Hunan province . with its own R&D center and more than 10000㎡manufacture plant . Chemfish owns 40 reactors from 1000L to 8000L. With complete auxiliary equipment as

3,6-difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:1 Gram

Negotiable

Type:Manufacturers

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Hangzhou Dingyan Chem Co., Ltd

The factory directly supplies and ships products with guaranteed quality Package:It is packed with polyethylene bag as inner layer, and a compound plastic woven bag as outer layer. The net weight of each bag is 25kg. Application:Used in multiple fiel

3,6-difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Trading Company

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HANGZHOU YUNUO CHEMICAL CO.,LTD

Superior quality, moderate price & quick delivery. Appearance:white crystalline powder Storage:Sealed in a cool ,dry and microtherm place , avoid light . Package: 10g/bag, 100g/bag, 1kg/bag or as per your request Application:It is an important

3,6-Difluoropyrazine-2-carbonitrile supplier in China

Cas:356783-28-3

Min.Order:10 Gram

Negotiable

Type:Trading Company

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Enke Pharma-tech Co.,Ltd. (Cangzhou, China )

high purity Storage:normal temperature Package:DRUM Application:mainly for medical use for R&Dpurpose use only Transportation:AIR,SEA Port:BEIJING,SHANGHAI,TIANJIN,SHENZHEN

3,6-difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Manufacturers

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Hubei Taiho Chemical Co.,LTD

TAIHO Unique Advantages:1.We're factory2.Free samples available3.Commodity inspection can be done4.ISO9001,Kosher certifications5.10 years experiences Storage:Store in cool &dry place Package:aluminium foil bag/fiber can/plastic drum Application:comp

3,6-Difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Manufacturers

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Xian Changyue Biological Technology Co., Ltd.

best seller Application:API

3,6-Difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Manufacturers

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Antimex Chemical Limied

Our own factory produces direct sales with absolute price advantage Application:Pharmaceutical industry Transportation:By sea Port:Shanghai/tianjin

Acetamide,N-[(4-aminophenyl)sulfonyl]-N-(6-methoxy-3-pyridazinyl)-

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Guangdong Juda Chemical Industrial Co.,Limited

Factory supply high purity low priceAppearance:solid or liquid Storage:sealed in cool and dry place Package:As customer's requested Application:Pharma Intermediate Transportation:by courier/air/sea Port:Any port in China

3,6-difluoro-2-pyrazinecarbonitrile CAS No.356783-28-3

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Trading Company

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Wuhan Circle Star Chem-medical Technology co.,Ltd.

good quality, competitive price, thoughtful after sale serviceAppearance:white powder Storage:Keep it in dry,shady and cool place Package:25kg,50kg,180kg,200kg,250kg,1000kg,customization Application:Pharma;Industry;Agricultural;chemical reaserch Tran

3,6-Difluoro-2-pyrazinecarbonitrile

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

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DB BIOTECH CO., LTD

best seller Application:API

3,6-Difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Trading Company

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Hangzhou Fandachem Co.,Ltd

3,6-difluoropyrazine-2-carbonitrileAppearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:pharmaceutical intermediate Transportation:by air, by sea, by express

3,6-difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Other

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Henan Kanbei Chemical Co.,LTD

factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin

3,6-Difluoropyrazine-2-carbonitrile

Cas:356783-28-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Synthetic route

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%
6-chloro-3-bromo-2-cyanopyrazine

6-chloro-3-bromo-2-cyanopyrazine

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
With potassium fluoride In N,N-dimethyl-formamide at 80 - 85℃; for 20h;91.2%
6-bromo-3-chloropyrazine-2-carbonitrile
1257072-34-6

6-bromo-3-chloropyrazine-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 70 - 100℃; for 4h;49%
With potassium fluoride; tetrabutylammomium bromide In dimethyl sulfoxide; toluene at 70 - 100℃; for 4h;49%
With potassium fluoride; tetrabutylammomium bromide In dimethyl sulfoxide at 70 - 100℃; for 4h;49%
With potassium fluoride; tetrabutylammomium bromide In dimethyl sulfoxide; toluene at 70 - 100℃; for 3h;49%
6-fluoro-3-(phenylsulfonyl)-2-pyrazinecarbonitrile
356783-59-0

6-fluoro-3-(phenylsulfonyl)-2-pyrazinecarbonitrile

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
With potassium fluoride; tetrabutylammomium bromide In water; dimethyl sulfoxide; ethyl acetate
2-hydroxypyrazine-3-carboxamide
55321-99-8

2-hydroxypyrazine-3-carboxamide

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 3 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
3.1: potassium fluoride; tetrabutylammomium bromide / toluene; dimethyl sulfoxide / 2.5 h / 60 °C
View Scheme
Multi-step reaction with 3 steps
1: tetrabutylammomium bromide; 2,6-dimethylpyridine / N,N-dimethyl-formamide / 17 h / 20 °C
2: trichlorophosphate; N-ethyl-N,N-diisopropylamine / chlorobenzene / 17 h / 0 - 100 °C
3: tetrabutylammomium bromide; potassium fluoride / dimethyl sulfoxide; toluene / 4 h / 70 - 100 °C
View Scheme
Multi-step reaction with 3 steps
1: 2,6-dimethylpyridine; tetrabutylammomium bromide / N,N-dimethyl-formamide / 17 h / 20 °C
2: trichlorophosphate; N-ethyl-N,N-diisopropylamine / chlorobenzene / 17 h / 0 - 100 °C
3: potassium fluoride; tetrabutylammomium bromide / dimethyl sulfoxide; toluene / 4 h / 70 - 100 °C
View Scheme
3-hydroxy-6-bromopyrazine-2-carboxamide

3-hydroxy-6-bromopyrazine-2-carboxamide

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: trichlorophosphate / chlorobenzene / 0.5 h / 60 °C
1.2: 2.67 h / 90 - 100 °C
2.1: potassium fluoride; tetrabutylammomium bromide / toluene; dimethyl sulfoxide / 2.5 h / 60 °C
View Scheme
Multi-step reaction with 2 steps
1: trichlorophosphate; N-ethyl-N,N-diisopropylamine / chlorobenzene / 17 h / 0 - 100 °C
2: potassium fluoride; tetrabutylammomium bromide / dimethyl sulfoxide; toluene / 4 h / 70 - 100 °C
View Scheme
Multi-step reaction with 2 steps
1: trichlorophosphate; N-ethyl-N,N-diisopropylamine / water / 8 h / 60 - 100 °C
2: potassium fluoride; tetrabutylammomium bromide / toluene; dimethyl sulfoxide / 3 h / 55 °C
View Scheme
Multi-step reaction with 2 steps
1.1: trichlorophosphate / 0.25 h / 70 °C
1.2: 6 h / 20 - 100 °C
1.3: 1 h
2.1: potassium fluoride dihydrate; tetrabutylammomium bromide / dimethyl sulfoxide / 3 h / 50 °C
View Scheme
Multi-step reaction with 2 steps
1: trichlorophosphate; N-ethyl-N,N-diisopropylamine / chlorobenzene / 17 h / 0 - 100 °C
2: potassium fluoride; tetrabutylammomium bromide / dimethyl sulfoxide; toluene / 3 h / 70 - 100 °C
View Scheme
2-pyrazine carbonitrile
19847-12-2

2-pyrazine carbonitrile

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 3 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
3.1: potassium fluoride; tetrabutylammomium bromide / dimethyl sulfoxide / 3 h / 55 °C / Sealed tube
View Scheme
1,4-dioxopyrazinamide
18960-19-5

1,4-dioxopyrazinamide

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: trichlorophosphate / 1.83 h / 50 - 70 °C
1.2: 6 h / 96 °C
2.1: potassium fluoride; tetrabutylammomium bromide / dimethyl sulfoxide / 3 h / 55 °C / Sealed tube
View Scheme
Multi-step reaction with 2 steps
1.1: trichlorophosphate / chlorobenzene / 1.83 h / 50 - 70 °C
1.2: 8 h / 110 °C
2.1: tetrabutyl ammonium fluoride; tetrabutylammomium bromide / 3 h / 60 °C / Sealed tube
View Scheme
3-aminopyrazinoic acid
5424-01-1

3-aminopyrazinoic acid

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 6 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
6: potassium fluoride; tetrabutylammomium bromide / toluene; dimethyl sulfoxide / 3 h / 55 °C
View Scheme
Multi-step reaction with 6 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
6.1: potassium fluoride dihydrate; tetrabutylammomium bromide / dimethyl sulfoxide / 3 h / 50 °C
View Scheme
Methyl 3-amino-2-pyrazinecarboxylate
16298-03-6

Methyl 3-amino-2-pyrazinecarboxylate

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 5 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
5: potassium fluoride; tetrabutylammomium bromide / toluene; dimethyl sulfoxide / 3 h / 55 °C
View Scheme
Multi-step reaction with 5 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
5.1: potassium fluoride dihydrate; tetrabutylammomium bromide / dimethyl sulfoxide / 3 h / 50 °C
View Scheme
methyl 3-amino-6-bromopyrazine-2-carboxylate
6966-01-4

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

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 4 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
4: potassium fluoride; tetrabutylammomium bromide / toluene; dimethyl sulfoxide / 3 h / 55 °C
View Scheme
Multi-step reaction with 4 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
4.1: potassium fluoride dihydrate; tetrabutylammomium bromide / dimethyl sulfoxide / 3 h / 50 °C
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-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: ammonium hydroxide / 3 h / 20 °C
2: trichlorophosphate; N-ethyl-N,N-diisopropylamine / water / 8 h / 60 - 100 °C
3: potassium fluoride; tetrabutylammomium bromide / toluene; dimethyl sulfoxide / 3 h / 55 °C
View Scheme
Multi-step reaction with 3 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
3.1: potassium fluoride dihydrate; tetrabutylammomium bromide / dimethyl sulfoxide / 3 h / 50 °C
View Scheme
pyrazinamide
98-96-4

pyrazinamide

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 3 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
3.1: tetrabutyl ammonium fluoride; tetrabutylammomium bromide / 3 h / 60 °C / Sealed tube
View Scheme
6-chloro-3-hydroxypyrazine-2-carboxamide

6-chloro-3-hydroxypyrazine-2-carboxamide

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: N-ethyl-N,N-diisopropylamine; phosphorus(V) oxybromide / chlorobenzene / 4 h / 0 °C / Reflux
2: potassium fluoride / N,N-dimethyl-formamide / 20 h / 80 - 85 °C
View Scheme
6-chloro-3-aminopyrazine-2-carbonitrile
17231-50-4

6-chloro-3-aminopyrazine-2-carbonitrile

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: titanium tetrachloride; tert.-butylnitrite / dichloromethane / 3 h / 0 - 20 °C
2: potassium fluoride; tetrabutylammomium bromide / dimethyl sulfoxide / 60 °C
View Scheme
3,6-dichloropyrazine-2-carboxamide

3,6-dichloropyrazine-2-carboxamide

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

3,6-difluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: N-ethyl-N,N-diisopropylamine; trichlorophosphate / 1 h / 75 °C
2: potassium fluoride / dimethyl sulfoxide / 60 - 90 °C / Large scale
View Scheme
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

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

6-fluoro-3-hydroxy-2-cyanopyrazine

Conditions
ConditionsYield
With water; sodium acetate In dimethyl sulfoxide at 5 - 45℃; for 4h; Large scale;93%
With water; sodium acetate In dimethyl sulfoxide; toluene at 50℃; for 7h;
With water; sodium acetate In 1,4-dioxane at 55℃; for 7h;3.26 g
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

favipiravir
259793-96-9

favipiravir

Conditions
ConditionsYield
Stage #1: 3,6-difluoropyrazine-2-carbonitrile With sodium acetate In tetrahydrofuran; water for 20h; Reflux;
Stage #2: With dihydrogen peroxide; sodium hydroxide In water; toluene at 0 - 20℃; for 4h;
89.6%
Multi-step reaction with 2 steps
1.1: sodium acetate; water / toluene; dimethyl sulfoxide / 7 h / 50 °C
2.1: sulfuric acid / 4 h / 50 °C
2.2: 0.67 h / 3 - 10 °C
2.3: 0.75 h / 10 °C
View Scheme
Multi-step reaction with 2 steps
1: hydrogenchloride / tetrahydrofuran / 1.5 h / 60 °C
2: sodium hydrogencarbonate / 1,4-dioxane; water / 8 h / 60 °C
View Scheme
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

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

3,6-difluoro-2-pyrazinecarboxamide

Conditions
ConditionsYield
With hydrogenchloride In tetrahydrofuran at 60℃; for 1.5h;75%
In tetrahydrofuran; ethanol
With dihydrogen peroxide at 27℃; for 2h;
With dihydrogen peroxide In dimethyl sulfoxide; toluene at 27℃; for 2h; Reagent/catalyst; Cooling with ice;
With dihydrogen peroxide; potassium carbonate In water; dimethyl sulfoxide at 25℃; for 1.5h; Reagent/catalyst;
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

2-[(2-hydroxybenzoyl)amino]ethan-1-amine
36288-93-4

2-[(2-hydroxybenzoyl)amino]ethan-1-amine

N-(2-((3-cyano-5-fluoropyrazin-2-yl)amino)ethyl)-2-hydroxybenzamide

N-(2-((3-cyano-5-fluoropyrazin-2-yl)amino)ethyl)-2-hydroxybenzamide

Conditions
ConditionsYield
In tetrahydrofuran at 20℃; for 3h;59%
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

propan-1-ol-3-amine
156-87-6

propan-1-ol-3-amine

6-fluoro-3-((3-hydroxypropyl)amino)pyrazine-2-carbonitrile

6-fluoro-3-((3-hydroxypropyl)amino)pyrazine-2-carbonitrile

Conditions
ConditionsYield
With triethylamine In dichloromethane at 20℃; for 2h;56%
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

3-(3-((triisopropylsilyloxy)methyl)cyclobutylamino)pyrazine-2-carboxamide

3-(3-((triisopropylsilyloxy)methyl)cyclobutylamino)pyrazine-2-carboxamide

6-fluoro-3-((3-(((triisopropylsilyl)oxy)methyl)cyclobutyl)amino)pyrazine-2-carbonitrile

6-fluoro-3-((3-(((triisopropylsilyl)oxy)methyl)cyclobutyl)amino)pyrazine-2-carbonitrile

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine; sodium iodide In tetrahydrofuran at 150℃; for 2h;45%
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

4-aminomethylphenol
696-60-6

4-aminomethylphenol

6-fluoro-3-((4-hydroxybenzyl)amino)pyrazine-2-carbonitrile

6-fluoro-3-((4-hydroxybenzyl)amino)pyrazine-2-carbonitrile

Conditions
ConditionsYield
In tetrahydrofuran at 20℃; for 3h;38%
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

serinol
534-03-2

serinol

3-((1,3-dihydroxypropan-2-yl)amino)-6-fluoropyrazine-2-carbonitrile

3-((1,3-dihydroxypropan-2-yl)amino)-6-fluoropyrazine-2-carbonitrile

Conditions
ConditionsYield
With triethylamine In dichloromethane at 20℃; for 2h;19%
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

6-fluoro-3-oxo-3,4-dihydro-2-pyrazinecarbonitrile
356783-31-8

6-fluoro-3-oxo-3,4-dihydro-2-pyrazinecarbonitrile

Conditions
ConditionsYield
With sodium chloride; sodium acetate In water; ethyl acetate; N,N-dimethyl-formamide
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

3-(allyloxy)-6-fluoro-2-pyrazinecarbonitrile
356783-44-3

3-(allyloxy)-6-fluoro-2-pyrazinecarbonitrile

Conditions
ConditionsYield
With sodium chloride; triethylamine In water; dimethyl sulfoxide; toluene
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

3-azido-6-fluoro-2-pyrazinecarbonitrile
356783-33-0

3-azido-6-fluoro-2-pyrazinecarbonitrile

Conditions
ConditionsYield
With sodium chloride In water; N,N-dimethyl-formamide
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

3-amino-6-fluoro-2-pyrazine-carbonitrile
356783-35-2

3-amino-6-fluoro-2-pyrazine-carbonitrile

Conditions
ConditionsYield
With ammonium hydroxide In 1,4-dioxane; ethanol; water
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

6-fluoro-3-methoxy-2-pyrazinecarbonitrile
356783-45-4

6-fluoro-3-methoxy-2-pyrazinecarbonitrile

Conditions
ConditionsYield
With sodium methylate In methanol; water; ethyl acetate
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

N-cyclohexyl-cyclohexanamine
101-83-7

N-cyclohexyl-cyclohexanamine

dicyclohexylamine salt
1137606-74-6

dicyclohexylamine salt

Conditions
ConditionsYield
Stage #1: 3,6-difluoropyrazine-2-carbonitrile With acetic acid; triethylamine In N,N-dimethyl-formamide at 5 - 15℃;
Stage #2: With ammonia In water pH=9.2;
Stage #3: N-cyclohexyl-cyclohexanamine In water; acetone; toluene Product distribution / selectivity;
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

3-((1,3-dihydroxypropan-2-yl)amino)-6-fluoropyrazine-2-carboxamide

3-((1,3-dihydroxypropan-2-yl)amino)-6-fluoropyrazine-2-carboxamide

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: triethylamine / dichloromethane / 2 h / 20 °C
2.1: potassium carbonate / dimethyl sulfoxide / 0.5 h / 10 °C
2.2: 2 h / 20 °C
View Scheme
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

2-[(2-hydroxybenzoyl)amino]ethan-1-amine
36288-93-4

2-[(2-hydroxybenzoyl)amino]ethan-1-amine

6-fluoro-3-((2-(2-hydroxybenzylamino)ethyl)amino)pyrazine-2-carboxamide

6-fluoro-3-((2-(2-hydroxybenzylamino)ethyl)amino)pyrazine-2-carboxamide

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: tetrahydrofuran / 3 h / 20 °C
2: dihydrogen peroxide; potassium carbonate / dimethyl sulfoxide / 4 h / 20 °C
View Scheme
3,6-difluoropyrazine-2-carbonitrile
356783-28-3

3,6-difluoropyrazine-2-carbonitrile

4-aminomethylphenol
696-60-6

4-aminomethylphenol

6-fluoro-3-((4-hydroxybenzyl)amino)pyrazine-2-carboxamide

6-fluoro-3-((4-hydroxybenzyl)amino)pyrazine-2-carboxamide

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: tetrahydrofuran / 3 h / 20 °C
2: dihydrogen peroxide; potassium carbonate / dimethyl sulfoxide / 2.5 h / 20 °C
View Scheme

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