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
Cas:120709-09-3
Min.Order:1 Kilogram
FOB Price: $3.0
Type:Lab/Research institutions
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
Cas:120709-09-3
Min.Order:0 Metric Ton
Negotiable
Type:Manufacturers
inquiryOur Server 1. Competitive offers with standard high quality or customize 2. Available customizing blending of above 2 single products 3. Prompt delivery within 2-3 weeks(1 weeks is available for ready stock) 4. Well-trained and profession
Our 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:120709-09-3
Min.Order:5 Kiloliter
FOB Price: $1.2 / 5.0
Type:Manufacturers
inquiryName: 7-APRA CAS NO:120709-09-3 Grade:Agomelatine intermediate Product Quality 12 years of chemical raw materials Mature operation of the industry System stability Data storage Security without vulnerability Product Technology Strong tec
Cas:120709-09-3
Min.Order:25 Kilogram
FOB Price: $1.0 / 2.0
Type:Other
inquiryOur company engages in Sodium Tripolyphosphate (STPP) and Sodium Hexametabphosphate (SHMP) production; development of noble metal catalysts, synthesis of electronic chemical materials and general chemicals Imp&Exp trading business. The company
Cas:120709-09-3
Min.Order:1 Kilogram
FOB Price: $1000.0
Type:Lab/Research institutions
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
Cas:120709-09-3
Min.Order:1 Kilogram
FOB Price: $1.0 / 10.0
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:120709-09-3
Min.Order:1 Kilogram
FOB Price: $139.0 / 210.0
Type:Trading Company
inquiryOur Advantage: high quality with competitive price High quality standard: BP/USP/EP Enterprise standard All purity customized Fast and safe delivery We have reliable forwarder who can help us deliver our goods more fast and safe. We
Cas:120709-09-3
Min.Order:10 Kilogram
FOB Price: $180.0 / 200.0
Type:Trading Company
inquiry1. Product advantages High purity, all above 98.5%, no impurities after dissolution We will test each batch to ensure quality OEM and private brand services designed for free Various cap colors available We can also provide MT1 peptide powd
Cas:120709-09-3
Min.Order:1 Kilogram
FOB Price: $100.0 / 102.0
Type:Trading Company
inquiryName: (6R,7R)-7-Amino-8-oxo-3-(1-propenyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid Synonyms: 7-APRA CAS: 120709-09-3 MF: C10H12N2O3S Appearance: white powder Storage:Store in cool and dry place, away from sun light. Package: 25kgs
Cas:120709-09-3
Min.Order:1 Kilogram
FOB Price: $1.0
Type:Other
inquiryAdvantages: Hubei XinRunde Chemical Co., Ltd is a renowned pharmaceutical manufacturer. We can offer high quality products at competitive price in quick delivery with 100% custom pass guaranteed. Never stop striving to offer our best service is
Cas:120709-09-3
Min.Order:1 Kilogram
Negotiable
Type:Other
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:120709-09-3
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
inquiryProduct Name: (6R,7R)-7-Amino-8-oxo-3-(1-propenyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid Synonyms: 7-apra;5-THIA-1-AZABICYCLO[4.2.0]OCT-2-ENE-2-CARBOXYLIC ACID, 7-AMINO-8-OXO-3-(1-PROPENYL)-, (6R,7R)-;(6R,7R)-7-AMINO-8-OXO-3-(1-
Cas:120709-09-3
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
inquiry(6R,7R)-7-Amino-8-oxo-3-(1-propenyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid CAS:120709-09-3 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and tra
Cas:120709-09-3
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
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
Cas:120709-09-3
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryAppearance:white or light yellow crystalline powder Storage:Store in a cool,dry place and keep away from direct strong light Package:As customer request Application:Used for research and industrial manufacture. Transportation:By
Hangzhou KeyingChem Co., Ltd. exported this product to many countries and regions at best price. If you are looking for the material’s manufacturer or supplier in China, KeyingChem is your best choice. Pls contact with us freely for getting det
Cas:120709-09-3
Min.Order:0 Metric Ton
Negotiable
Type:Lab/Research institutions
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
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
Cas:120709-09-3
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryA 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
Cas:120709-09-3
Min.Order:4 Kilogram
Negotiable
Type:Lab/Research institutions
inquiryProName: (6R,7R)-7-Amino-8-oxo-3-(1-propenyl)-5... CasNo: 120709-09-3 Molecular Formula: C10H12N2O3 S Appearance: detailed see specifications Application: It is an important raw material and in... DeliveryTime: prompt PackAge: according to t
Cas:120709-09-3
Min.Order:1 Gram
FOB Price: $6.0 / 9.0
Type:Trading Company
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:120709-09-3
Min.Order:10 Gram
FOB Price: $100.0
Type:Lab/Research institutions
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 providing h
We are one of a few suppliers that can offer custom synthesis service of this product We are specialized in custom synthesis, chemical/pharmaceutical/ pesticides outsourcing and contract research. We are committed to prov
Cas:120709-09-3
Min.Order:100 Gram
FOB Price: $100.0 / 2000.0
Type:Lab/Research institutions
inquirySuperior quality, moderate price & quick delivery. Appearance:White or almost white crystalline powder Storage:Stored in cool, dry and ventilation place; Away from fire and heat Package:as per your request Application:Used as Pharmaceutical
Cas:120709-09-3
Min.Order:1 Kilogram
Negotiable
Type:Trading Company
inquiryEstablished 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
Cas:120709-09-3
Min.Order:10 Gram
Negotiable
Type:Lab/Research institutions
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,
Cas:120709-09-3
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
inquiryProduct name: 7-APRA CAS No.: 120709-09-3 Molecule Formula:C10H12N2O3S Molecule Weight:240.28 Purity: 99.0% Package: 25kg/drum Description:White crystalline powder Manufacture Standards:Enterprise Standard TESTING
ISO9001 Exporting Japan, Korea regularly. 1.We have been specializing in special fine chemical for long, with strong R&D strength. 2.ISO9001. 3.We have been cooperating with oversea from Europe, USA, Korea, Japan etc... Appearance:off
Cas:120709-09-3
Min.Order:1 Kilogram
Negotiable
Type:Other
inquiryacetaldehyde
7-Aminocephalosporanic acid
(6R,7R)-7-amino-3-(propen-1-yl)-3-cephem-4-carboxylic acid
Conditions | Yield |
---|---|
Stage #1: 7-Aminocephalosporanic acid With pyridine; 1,1,1,3,3,3-hexamethyl-disilazane In benzene for 2h; Inert atmosphere; Reflux; Stage #2: With trimethylsilyl iodide In benzene at 0℃; for 1h; Stage #3: acetaldehyde Reagent/catalyst; Further stages; | 84.24% |
(6R,7R)-7-amino-3-(propen-1-yl)-3-cephem-4-carboxylic acid
D-2-p-hydroxyphenylglycine methyl ester
7-[2-amino-2-(4-hydroxyphenyl)acetamido]-3-(propen-1-yl)-3-cephem-4-carboxylic acid
Conditions | Yield |
---|---|
Stage #1: (7R,8R)-7-amino-3-[propen-1-yl]-3-cephem-4-carboxylic acid With penicillin acylase at 30 - 35℃; for 0.5h; pH=7; Enzymatic reaction; Stage #2: D-2-p-hydroxyphenylglycine methyl ester With sodium lauryl sulfate In 1,4-dioxane at 30 - 35℃; for 2h; Reagent/catalyst; | 97.74% |
(6R,7R)-7-amino-3-(propen-1-yl)-3-cephem-4-carboxylic acid
A
cefprozil
B
E-cefprozil
Conditions | Yield |
---|---|
Stage #1: (7R,8R)-7-amino-3-[propen-1-yl]-3-cephem-4-carboxylic acid; ((R)-(2-ethoxycarbonyl-1-methyl-vinylamino)-(4-hydroxyphenyl)-acetyloxy)-(triphenyl)phosphonium chloride With triethylamine In dichloromethane; water at -40 - 0℃; for 3h; Stage #2: With hydrogenchloride In dichloromethane; water for 1h; Stage #3: With sodium hydroxide In dichloromethane; water at 0℃; for 2h; pH=3.2; | |
Stage #1: (7R,8R)-7-amino-3-[propen-1-yl]-3-cephem-4-carboxylic acid; ((R)-(2-ethoxycarbonyl-1-methyl-vinylamino)-(4-hydroxyphenyl)-acetyloxy)-(triphenyl)phosphonium chloride With triethylamine In ISOPROPYLAMIDE; water at -40 - 0℃; for 3h; Stage #2: With hydrogenchloride In ISOPROPYLAMIDE; water for 1h; Stage #3: With sodium hydroxide In ISOPROPYLAMIDE; water at 0℃; for 2h; pH=3.2; |
(6R,7R)-7-amino-3-(propen-1-yl)-3-cephem-4-carboxylic acid
A
cefprozil
B
E-cefprozil
Conditions | Yield |
---|---|
Stage #1: potassium (R)-(2-ethoxycarbonyl-1-methyl-vinylamino)-(4-hydroxyphenyl)-acetate With pyridine; pivaloyl chloride In DMF (N,N-dimethyl-formamide); dichloromethane at -30℃; for 2h; Stage #2: (7R,8R)-7-amino-3-[propen-1-yl]-3-cephem-4-carboxylic acid With triethylamine In DMF (N,N-dimethyl-formamide); dichloromethane; water at -40 - 0℃; for 3h; |
Conditions | Yield |
---|---|
With dmap; dicyclohexyl-carbodiimide In dichloromethane at 20℃; for 3h; |
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