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
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inquiryWelcome to Simagchem, your partner in China as a premier supply of bulk specialty chemicals for industry and life science. We introduce experienced quality product and exceptional JIT service with instant market intelligence in China to benefit our
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inquiryHigh quality 5-Bromo-4,7-diazaindole CAS 875781-43-4 with factory price Company profile Wuhan Fortuna Chemical Co.,Ltd established in 2006, is a big integrative chemical enterprise being engaged in Pharmaceutical & its intermediates, Food/Fe
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inquiryGood quality Good price Promptly delivery intermediate Appearance:white powder Storage:dry dondition Package:According to the demand of customer Application:intermediate Transportation:According to the demand of custom
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inquiryChemwill Asia co.,Ltd is one of the leading manufacturer in CHINA. Product quality, process, price and service 5-Bromo-4,7-diazaindole 875781-43-4 Factory PRICE IN STOCK COA CAS 875781-43-4 875781-43-4 highly quality and immedaite deliver
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inquiryOur company was built in 2009 with an ISO certificate.In the past 5 years, we have grown up as a famous fine chemicals supplier in China and we had established stable business relationships with Samsung,LG,Merck,Thermo Fisher Scientific and so on.
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
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inquiryOur Advantage Rich Experience Our products are sold all over Europe,North&South America, Sino-East, Asia and pacific area as well as Africa,we establish long term. Quality service Company cooperates with research institutes. We strictly con
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inquiryHenan 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
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
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inquiryJ&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
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inquiry5-bromo-4,7-diazaindoleAppearance:white crystalline powder Storage:Shading, sealed, dry place. Package:according to customers' requirements Application:pharmaceutical intermediates raw material Transportation:By air(EMS or EUB or FedEx or TNT ect...
Product name: 5-Bromo-4,7-Diazaindole CAS No.:875781-43-4 Molecule Formula:C6H4BrN3 Molecule Weight:198.02 Purity: 98.0% Package: 25kg/drum Description:White powder Manufacture Standards:Enterprise Standard TESTING ITEMS
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inquiry1. DMF is available. Hangzhou Huarong Pharm Co., Ltd. established since 2009 , has been always focusing on supplying products and services to our clients in the field of small molecule drug. Huarong Pharm has built platforms for the research, d
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inquiryProduct 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,
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inquiryHunan 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
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inquiryDalian Bajia import and export co. ltd have great engineer make more great quality cargo will meet all customer request . Now we have own lab for cargo even my cargo is so less but quality and quantity and shippment will be promise as we are pro
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inquiryHigh 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
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inquiryGOLDEN 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
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
Shanghai Finebiotech Co.,Ltd.was established in 2020, which providing professional chemical services. As a customer-oriented company, we have distinguished ourself from others in providing worldwide customers with cost-effective and efficient service
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inquiryStock products, own laboratory Package:Grams, Kilograms Application:For R&D Transportation:According to customer request Port:Shanghai
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inquiryAppearance:Solid powder Storage:Sealed,light and oxygen resistant Package:Foil bag or drum Application:Applied in dietary supplements,pharmaceutical or cosmeticeuticals Transportation:by sea or air Port:Beijing or Guangzhou Port
high purity,in stock Package:25kg/drum,or as per customers'demand Application:API,Pharmaceutical intermediates Transportation:air,sea,courier
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inquirywith high qualityAppearance:white powder Storage:Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Package:25kg/drum Application:as intermediates Transportation:by courier, air or sea Port:At any port from China
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inquiryTAIHO 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
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
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inquiryFredchem focus on CRO/CMO business and its own R&D of API/Intermediates Package:Kilograms/MT Application:Pharmaceutical field Transportation:According to customer request Port:Shanghai
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inquiryAnsciep 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
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inquiryAmoychem is committed to providing the top-quality chemical products and services Internationally. We offer our customers with friendly, professional service and reliable, high performance products that have been manufactured according to the accredi
5-bromo-3-((trimethylsilyl)ethynyl)pyrazine-2-amine
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With potassium tert-butylate In tetrahydrofuran at 20℃; for 2h; Inert atmosphere; Reflux; | 76% |
With potassium tert-butylate In 1-methyl-pyrrolidin-2-one for 3h; Heating; | 69% |
Multi-step reaction with 2 steps 1: pyridine / tetrahydrofuran / 96 h 2: tetrabutyl ammonium fluoride / tetrahydrofuran / 20 h / 75 °C View Scheme |
5-bromo-3-(2-triethylsilylethynyl)pyrazin-2-amine
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With potassium tert-butylate In 1-methyl-pyrrolidin-2-one at 80℃; for 1.5h; | 70.3% |
N-(5-bromo-3-((trimethylsilyl)ethynyl)pyrazin-2-yl)acetamide
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With tetrabutyl ammonium fluoride In tetrahydrofuran for 15h; | 43% |
With tetrabutyl ammonium fluoride In tetrahydrofuran at 75℃; for 20h; | 42% |
With tetrabutyl ammonium fluoride In tetrahydrofuran at 75℃; for 20h; | 42% |
With tetrabutyl ammonium fluoride In tetrahydrofuran at 75℃; for 20h; | 42% |
With tetrabutyl ammonium fluoride In tetrahydrofuran for 15h; Reflux; | 16% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
In water for 0.5h; | 91 g |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
In water for 0.5h; | 90 g |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
In water for 0.5h; | 90.2 g |
5-bromo-3-ethynyl-pyrazin-2-ylamine
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: N,N-dimethyl-formamide / 16 h / 20 - 60 °C 2: water / 0.5 h View Scheme | |
Multi-step reaction with 2 steps 1: N,N-dimethyl-formamide / 16 h / 20 - 60 °C 2: water / 0.5 h View Scheme | |
Multi-step reaction with 2 steps 1: N,N-dimethyl-formamide / 16 h / 20 - 60 °C 2: water / 0.5 h View Scheme |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
In water for 0.5h; Solvent; | 9.3 kg |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
2-bromo-7-iodo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With N-iodo-succinimide In N,N-dimethyl-formamide at 20℃; for 1h; | 100% |
With iodine; potassium hydroxide In N,N-dimethyl-formamide at 20℃; for 2h; Inert atmosphere; | 95% |
With N-iodo-succinimide In acetone at 20℃; for 4h; | 89% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
p-toluenesulfonyl chloride
2-bromo-7-iodo-5-tosyl-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With sodium hydride In tetrahydrofuran at 0 - 20℃; for 3.33333h; | 99% |
formaldehyd
2-bromo-5H-pyrrolo[2,3-b]pyrazine
(2-bromo-5-hydroxymethyl-5H-pyrrolo[2,3-b]pyrazin-7-yl)-methanol
Conditions | Yield |
---|---|
With sodium hydroxide In 1,4-dioxane at 20℃; Inert atmosphere; | 99% |
With sodium hydroxide In 1,4-dioxane; water at 20℃; for 18h; | 95.5% |
Stage #1: formaldehyd; 2-bromo-5H-pyrrolo[2,3-b]pyrazine With sodium hydroxide In 1,4-dioxane; water at 20℃; Stage #2: With hydrogenchloride In water | 87% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
p-toluenesulfonyl chloride
2-bromo-5-(p-toluenesulfonyl)-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
Stage #1: 2-bromo-5H-pyrrolo[2,3-b]pyrazine With sodium hydride In N,N-dimethyl-formamide at 0 - 5℃; for 0.5h; Stage #2: p-toluenesulfonyl chloride In N,N-dimethyl-formamide at 0 - 20℃; | 97% |
With sodium hydride In N,N-dimethyl-formamide; mineral oil at 30℃; for 8h; Inert atmosphere; | 86% |
With sodium hydride In tetrahydrofuran; mineral oil at -15 - 20℃; for 1h; | 79.3% |
With triethylamine In dichloromethane at 20℃; for 3h; Solvent; Reagent/catalyst; Temperature; | 56.1% |
With sodium hydride In N,N-dimethyl-formamide |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
2-(4-(isopropylsulfonyl)phenyl)-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With sodium carbonate; tetrakis(triphenylphosphine) palladium(0) In 1,4-dioxane; water at 100℃; | 95% |
4-tert-butylbenzenesulfonyl chloride
2-bromo-5H-pyrrolo[2,3-b]pyrazine
2-bromo-5-(4-tert-butylphenylsulfonyl)-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
Stage #1: 2-bromo-5H-pyrrolo[2,3-b]pyrazine With sodium hydride In N,N-dimethyl-formamide; mineral oil at 0℃; for 0.25h; Stage #2: 4-tert-butylbenzenesulfonyl chloride In N,N-dimethyl-formamide; mineral oil at 0 - 10℃; for 2h; | 91% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
(2-trimethylethylsilylethoxy)methyl chloride
2-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With caesium carbonate In N,N-dimethyl-formamide at 20℃; | 90% |
Stage #1: 2-bromo-5H-pyrrolo[2,3-b]pyrazine With sodium hydride In N,N-dimethyl-formamide; mineral oil at 0℃; for 0.5h; Stage #2: (2-trimethylethylsilylethoxy)methyl chloride In N,N-dimethyl-formamide; mineral oil at 0 - 20℃; for 3h; | 90% |
Stage #1: 2-bromo-5H-pyrrolo[2,3-b]pyrazine With sodium hydride In N,N-dimethyl-formamide at 0℃; Stage #2: (2-trimethylethylsilylethoxy)methyl chloride In N,N-dimethyl-formamide Stage #3: With water In N,N-dimethyl-formamide Product distribution / selectivity; | 86% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
benzenesulfonyl chloride
Conditions | Yield |
---|---|
Stage #1: 2-bromo-5H-pyrrolo[2,3-b]pyrazine With sodium hydride In tetrahydrofuran; mineral oil at 0℃; for 0.5h; Stage #2: benzenesulfonyl chloride In tetrahydrofuran; mineral oil for 1h; | 88% |
Stage #1: 2-bromo-5H-pyrrolo[2,3-b]pyrazine With sodium hydride In tetrahydrofuran; mineral oil at 0℃; for 0.5h; Stage #2: benzenesulfonyl chloride In tetrahydrofuran; mineral oil at 20℃; for 12h; | 82% |
Conditions | Yield |
---|---|
With bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine In N,N-dimethyl acetamide at 50 - 80℃; for 24h; Solvent; Inert atmosphere; | 88% |
formaldehyd
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With sodium hydroxide In 1,4-dioxane; water | 87% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
3,4,5-trimethoxyphenylboronic Acid
2-(3,4,5-trimethoxy-phenyl)-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; potassium carbonate In 1,4-dioxane; water at 110℃; for 18h; | 83% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; potassium carbonate In 1,4-dioxane at 90℃; for 16h; Suzuki Coupling; Inert atmosphere; | 80% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
3,4-Dimethoxyphenylboronic acid
2-(3,4-dimethoxyphenyl)-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; potassium carbonate In 1,4-dioxane; water at 110℃; for 18h; | 76.9% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
(2-fluoro-pyridin-3-yl)boronic acid
2-(2-fluoropyridin-3-yl)-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With sodium carbonate; tetrakis(triphenylphosphine) palladium(0) In 1,4-dioxane; ethanol; water at 140℃; for 0.25h; Inert atmosphere; microwave irradiation; sealed tube; | 76% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
3,5-dimethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isoxazole
Conditions | Yield |
---|---|
With palladium bis[bis(diphenylphosphino)ferrocene] dichloride; potassium carbonate In water; acetonitrile at 160℃; for 0.333333h; Microwave irradiation; | 76% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
methyl iodide
Conditions | Yield |
---|---|
Stage #1: 2-bromo-5H-pyrrolo[2,3-b]pyrazine With sodium hydride In tetrahydrofuran at 0 - 18℃; for 0.5h; Stage #2: methyl iodide In tetrahydrofuran at 18℃; for 2h; | 72% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
pivaloyl chloride
1-(2-bromo-5H-pyrrolo[2,3-b]pyrazin-7-yl)-2,2-dimethylpropan-1-one
Conditions | Yield |
---|---|
Stage #1: 2-bromo-5H-pyrrolo[2,3-b]pyrazine With diethylaluminium chloride In hexane; dichloromethane at 0 - 5℃; for 0.5h; Stage #2: pivaloyl chloride In hexane; dichloromethane for 15h; Reflux; | 63% |
Stage #1: 2-bromo-5H-pyrrolo[2,3-b]pyrazine With diethyl aluminiumcholoride In hexane; dichloromethane at 0℃; for 0.5h; Inert atmosphere; Stage #2: pivaloyl chloride at 0 - 20℃; for 21.1667h; |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
4-pyridylboronic acid
2-(pyridin-4-yl)-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; sodium carbonate In water; acetonitrile at 150℃; for 0.5h; Microwave irradiation; | 60% |
With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; sodium carbonate In acetonitrile at 150℃; for 0.5h; Suzuki-Miyaura Coupling; Inert atmosphere; Microwave irradiation; | 0.28 g |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
2-chloro-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With triethylamine; trichlorophosphate In 1,4-dioxane at 110℃; for 6h; | 54% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
trityl chloride
Conditions | Yield |
---|---|
With caesium carbonate In N,N-dimethyl-formamide at 40℃; for 2h; | 52% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
isopropylamine
Conditions | Yield |
---|---|
Stage #1: 2-bromo-5H-pyrrolo[2,3-b]pyrazine With chlorosulfonic acid at 0 - 120℃; for 2.5h; Inert atmosphere; Stage #2: isopropylamine With triethylamine In dichloromethane at 0℃; for 3h; Inert atmosphere; | 49% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
1-methyl-4-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]piperazine
Conditions | Yield |
---|---|
With dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; caesium carbonate In 1,4-dioxane; water at 100℃; for 16h; Sealed tube; Inert atmosphere; | 40.5% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
hexamethylenetetramine
2-bromo-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde
Conditions | Yield |
---|---|
With trifluoroacetic acid at 0 - 110℃; for 12h; | 40% |
With trifluoroacetic acid at 80℃; for 0.25h; Microwave irradiation; | 0.45 g |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; potassium carbonate In 1,4-dioxane; water at 95℃; for 24h; Inert atmosphere; | 35% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
4-nitrobenzaldehdye
Conditions | Yield |
---|---|
With potassium hydroxide In methanol at 20℃; for 48h; | 25.3% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
Conditions | Yield |
---|---|
With bis-triphenylphosphine-palladium(II) chloride; sodium carbonate In water; acetonitrile at 140℃; for 0.5h; Suzuki Coupling; Inert atmosphere; Sealed tube; Microwave irradiation; | 10% |
2-bromo-5H-pyrrolo[2,3-b]pyrazine
4-Chlorophenylboronic acid
Conditions | Yield |
---|---|
With potassium carbonate; (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride In water; acetonitrile at 120℃; for 0.166667h; Suzuki Coupling; Microwave irradiation; |
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