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
Cas:43200-82-4
Min.Order:1 Kilogram
FOB Price: $3.0
Type:Lab/Research institutions
inquiryhigh quality Appearance:White or off white powder Storage:Sealed, dry, microtherm , avoid light and smell Package:According to the demand of customer Application:Pharmaceutical intermediates Transportation:by air or by sea Port:shanghai
Cas:43200-82-4
Min.Order:1 Kilogram
Negotiable
Type:Manufacturers
inquiryThe above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi
Cas:43200-82-4
Min.Order:1
Negotiable
Type:Other
inquiryOur main production base is located in Xuzhou industry park. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place.Our R&D team masters core technology for process-design of target building block
Cas:43200-82-4
Min.Order:5 Kiloliter
FOB Price: $1.2 / 5.0
Type:Manufacturers
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.O
Cas:43200-82-4
Min.Order:1 Gram
FOB Price: $1.0
Type:Lab/Research institutions
inquiryOur 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
Cas:43200-82-4
Min.Order:1 Kilogram
FOB Price: $9.0 / 99.0
Type:Trading Company
inquiryWITH 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
Cas:43200-82-4
Min.Order:1 Kilogram
FOB Price: $139.0 / 210.0
Type:Trading Company
inquiry1.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
Cas:43200-82-4
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
inquiryOur company has been in existence for 10 years since its establishment. We have our own unique team. The company integrates independent research and development, production and sales. We have established famous brands at home and abroad. At present,
Cas:43200-82-4
Min.Order:1 Kilogram
FOB Price: $675.0 / 689.0
Type:Trading Company
inquiry6-(5-Chloro-2-pyridyl)-5H-pyrrolo[3,4-b]pyrazine-5,7(6H)-dione CAS:43200-82-4 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates,
Cas:43200-82-4
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
inquiryHello, 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
Cas:43200-82-4
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
inquiryPharmaceutical Grade CAS 43200-82-4 with competitive price CAS: 43200-82-4 Specificatio Category Pharmaceutical Raw Materials, Fine Chemicals, Bulk drug Standard Medical standard Shelf life 2 years St
Cas:43200-82-4
Min.Order:1 Kilogram
FOB Price: $100.0 / 150.0
Type:Other
inquiryCompany 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
Cas:43200-82-4
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
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
Cas:43200-82-4
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryZibo 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:43200-82-4
Min.Order:10 Gram
FOB Price: $100.0
Type:Lab/Research institutions
inquiryGMP standard, high purity, competitive price, in stock 1. Quick Response: within 6 hours after receiving your email. 2. Quality Guarantee: All products are strictly tested by our QC, confirmed by QA, and approved by a third-party lab in China, USA,
Cas:43200-82-4
Min.Order:1 Milligram
Negotiable
Type:Trading Company
inquiryfactory?direct?saleAppearance:White Powder Storage:Store In Dry, Cool And Ventilated Place Package:25kg/drum, also according to the clients requirement Application:It is widely used as a thickener, emulsifier and stabilizer Transportation:By Sea Or B
Cas:43200-82-4
Min.Order:1 Kilogram
FOB Price: $18.0 / 20.0
Type:Trading Company
inquiryShandong 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
Cas:43200-82-4
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
inquiry1.Applied in food field.it can improve the immune system and prolong life. 2.Appliedin cosmetic field.it can improve the skin care. 3.Applied in pharmaceutical field.it can treat various dieases. 4.Our product quality assurance will make our customer
Cas:43200-82-4
Min.Order:1 Metric Ton
FOB Price: $1.5
Type:Trading Company
inquiryAppearance:95%+ Package:R&D,Pilot run Transportation:per client require Port:Express ,Air, Sea
Cas:43200-82-4
Min.Order:0
Negotiable
Type:Manufacturers
inquiryShanghai Massive Chemical Technology Co., Ltd. is engaged in development, production and marketing Specialty Chemicals to satisfy the changing needs of the chemical industry. We specialize in manufacturing high quality of Advanced Intermediates, Sp
Cas:43200-82-4
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
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
Cas:43200-82-4
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquirySuperior quality, moderate price & quick delivery. Appearance:white powder Storage:stored in a cool, dry and ventilated place to provent sun and rain Package:25kg/drum, or as per your request. Application:For medicine , pesticide intermedia
Cas:43200-82-4
Min.Order:1 Kilogram
Negotiable
Type:Trading Company
inquiryWe 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
Cas:43200-82-4
Min.Order:1 Metric Ton
FOB Price: $1.0
Type:Trading Company
inquiryLower 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
Cas:43200-82-4
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryhigh purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:drum and bag Application:for pharma use Transportation:by sea or air Port:Beijing or Guangzhou
Cas:43200-82-4
Min.Order:0
Negotiable
Type:Other
inquiryJinhua huayi chemical co., ltd. is dedicated to the development, production and marketing of chemicals. On the basis of equality and mutual benefit, and under the principle of customer first, credit first, quality first, we are ready to join hands
Cas:43200-82-4
Min.Order:100 Gram
Negotiable
Type:Lab/Research institutions
inquiryOur clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS
Cas:43200-82-4
Min.Order:0
Negotiable
Type:Manufacturers
inquirybest seller Application:API
Cas:43200-82-4
Min.Order:0
Negotiable
Type:Manufacturers
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
Cas:43200-82-4
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquirybis(trichloromethyl) carbonate
3-((5-chloropyridin-2-yl)carbamoyl)pyrazine-2-carboxylic acid
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
Conditions | Yield |
---|---|
With Triphenylphosphine oxide In dichloromethane at 20℃; for 0.0833333h; Temperature; Concentration; | 98.5% |
5-chloro-2-pyridylamine
2,3-pyrazinedicarboxylic anhydride
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
Conditions | Yield |
---|---|
With propionic acid anhydride at 60 - 105℃; for 1h; Temperature; Reagent/catalyst; | 87% |
With dmap; triethylamine In 5,5-dimethyl-1,3-cyclohexadiene at 0℃; for 13h; Reflux; | 85% |
3-((5-chloropyridin-2-yl)carbamoyl)pyrazine-2-carboxylic acid
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
Conditions | Yield |
---|---|
With chloroformic acid ethyl ester; triethylamine In dichloromethane at 0 - 20℃; for 2h; | |
Stage #1: 3-((5-chloropyridin-2-yl)carbamoyl)pyrazine-2-carboxylic acid In dichloromethane for 1h; Heating / reflux; Stage #2: With thionyl chloride; N,N-dimethyl-formamide In dichloromethane at 25 - 30℃; for 0.75 - 1h; Heating / reflux; |
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
Conditions | Yield |
---|---|
With manganese(IV) oxide In dichloromethane for 3h; Reflux; | 12.5 g |
5-chloro-2-pyridylamine
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: toluene / 2.5 h / 20 - 52 °C 1.2: 1 h / 10 - 15 °C 2.1: dichloromethane / 1 h / Heating / reflux 2.2: 0.75 - 1 h / 25 - 30 °C / Heating / reflux View Scheme |
2,3-pyrazinedicarboxylic anhydride
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: toluene / 2.5 h / 20 - 52 °C 1.2: 1 h / 10 - 15 °C 2.1: dichloromethane / 1 h / Heating / reflux 2.2: 0.75 - 1 h / 25 - 30 °C / Heating / reflux View Scheme |
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
6-(5-chloropyridin-2-yl)-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-one
Conditions | Yield |
---|---|
With diisobutylaluminium hydride In toluene at -25 - -10℃; for 2h; Temperature; Solvent; | 91.1% |
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
6-(5-chloropyridin-2-yl)-7-hydroxy-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-one
Conditions | Yield |
---|---|
Stage #1: 6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine With potassium borohydride In 1,4-dioxane at 10 - 15℃; for 0.5h; Stage #2: With water In 1,4-dioxane for 6h; | 87.4% |
With potassium borohydride; water In tetrahydrofuran at -10 - 5℃; for 3h; Large scale; | 70% |
With potassium borohydride; potassium carbonate In 1,4-dioxane; water; N,N-dimethyl-formamide at 13℃; pH=11; Reagent/catalyst; Solvent; pH-value; | 95.5 g |
With sodium hydroxide; sodium tetrahydroborate In water at 0 - 5℃; for 4 - 5h; Product distribution / selectivity; |
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
(R)-6-(5-chloropyridin-2-yl)-7-oxo-6,7-dihydro-5H-pyrrolo[3,4b]pyrazin-5-yl 4-methylpiperazine-1-carboxylate D-(+)-O,O'-dibenzoyltartaric acid salt
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: sodium hydroxide; sodium tetrahydroborate / water / 4 - 5 h / 0 - 5 °C 2: dmap; calcium oxide / dichloromethane; N,N-dimethyl-formamide / 10 - 30 °C 3: water; acetonitrile / 3 - 4.5 h / 25 - 80 °C / Resolution of racemate View Scheme |
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
eszopiclone dibenzoyl-D-tartrate
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: sodium hydroxide; sodium tetrahydroborate / water / 4 - 5 h / 0 - 5 °C 2: dmap; calcium oxide / dichloromethane; N,N-dimethyl-formamide / 10 - 30 °C 3: water; acetonitrile / 3 - 4.5 h / 25 - 80 °C / Resolution of racemate View Scheme |
6-(5-chloro-2-pyridyl)-5,7-dioxo-6,7-dihydro-5H-pyrrolo(3,4-b)pyrazine
eszopiclone
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: sodium hydroxide; sodium tetrahydroborate / water / 4 - 5 h / 0 - 5 °C 2: dmap; calcium oxide / dichloromethane; N,N-dimethyl-formamide / 10 - 30 °C 3: water; acetonitrile / 3 - 4.5 h / 25 - 80 °C / Resolution of racemate 4: water; sodium hydrogencarbonate / 3 - 4 h / 25 - 30 °C View Scheme |
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View