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
Cas:125605-10-9
Min.Order:1 Kilogram
FOB Price: $3.0
Type:Lab/Research institutions
inquiryWith 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
Cas:125605-10-9
Min.Order:1 Kilogram
FOB Price: $70.0 / 90.0
Type:Trading Company
inquiry1.In No Less 10 years exporting experience. you 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 Specializ
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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
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inquiryOur 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
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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,
Cas:125605-10-9
Min.Order:1 Kilogram
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Type:Lab/Research institutions
inquiryZhenyu 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
Cas:125605-10-9
Min.Order:1 Kilogram
FOB Price: $2.0
Type:Lab/Research institutions
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
high qualityAppearance:white crystalline powder Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea
J&H CHEM is one of China's leading providers of integrated fine chemical services including offering, research and development, Custom manufacturing business, as well as other Value-added customer services, for diversified range products of chemicals
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inquiryhigh purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:Foil bag; Drum; Plastic bottle Application:Pharma;Industry;Agricultural Transportation:by sea or air Port:Beijing or Guangzhou
Cas:125605-10-9
Min.Order:0
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Type:Lab/Research institutions
inquiry1.Our services:A.Supply sampleB.The packing also can be according the customers` requirmentC.Any inquiries will be replied within 24 hoursD.we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate.
Cas:125605-10-9
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiry1,we produce and sell good chemicals around the world.2,our success rate is about 95%. this means, if customer order is accepted, the probability that the customer will obtain the ordered substances, is 95%.3,our staff consists of highly qualified in
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inquiry(R)-4-BENZYLOXYMETHYL-2,2-DIMETHYL-1,3-DIOXOLANEAppearance:detailed in specifications Storage:Keep away of light, cool place Package:25kg/drum;200kg/drum Application:An important raw material and intermediate used in Organic Synthesis, Pharmaceutical
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Negotiable
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inquiryWe 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. Application:intermediate
(R)-4-CHLOR-1,3-BUTANEDIOLAppearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express
factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
Cas:125605-10-9
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Type:Lab/Research institutions
inquiryBest Seller, High Quality, Competitive Price, Fast Delivery, Quick ResponseAppearance:powder, or liquid Storage:Stored in room temperature, ventilated place Package:Bottle, barrel, cargo, container, etc. Application:Pharmaceuticals, intermediates, AP
Price, service, company and transport advantage: 1. Best service, place of origin China, high quality, and reasonable price. 2. It's customers' right to choose the package (EMS, DHL, FEDEX, UPS). 3. It's customers' right to choo
Cas:125605-10-9
Min.Order:5 Kilogram
Negotiable
Type:Trading Company
inquiryAdequate stocks available,prompt shipment,Strictly control on quality,Timely after-sales Application:Intermediate
Cas:125605-10-9
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryCas:125605-10-9
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiry1. Our staff are all biomedical related majors with rich experience in the pharmaceutical industry, and can provide you with more professional services.2. Our supplier has a good quality management system, and the quality of products is reliable and
ethyl (L)-4-chloro-3-hydroxybutyrate
(3R)-4-chloro-1,3-butanediol
Conditions | Yield |
---|---|
Stage #1: ethyl (L)-4-chloro-3-hydroxybutyrate With sodium tetrahydroborate In methanol; toluene at 20℃; for 12h; Stage #2: With hydrogenchloride; water In methanol; toluene at 10℃; | 97% |
With sodium tetrahydroborate In tetrahydrofuran at 40℃; for 5h; | 96% |
Stage #1: ethyl (L)-4-chloro-3-hydroxybutyrate With sodium tetrahydroborate In tetrahydrofuran at 20 - 40℃; for 16h; Stage #2: With hydrogenchloride In tetrahydrofuran; methanol; water at 0℃; for 0.5h; | 95% |
Stage #1: ethyl (L)-4-chloro-3-hydroxybutyrate With sodium tetrahydroborate In toluene at -5 - 5℃; for 0.5h; Inert atmosphere; Stage #2: With methanol In toluene at -5 - 25℃; |
ethyl 4-chloro-3-hydroxybutanoate
A
(3S)-4-chloro-1,3-butanediol
B
(3R)-4-chloro-1,3-butanediol
Conditions | Yield |
---|---|
With sodium tetrahydroborate In tetrahydrofuran for 1h; Heating; Yield given. Yields of byproduct given. Title compound not separated from byproducts; |
(3R)-4-chloro-1,3-butanediol
(R)-3-Hydroxytetrahydrofuran
Conditions | Yield |
---|---|
With hydrogenchloride; sodium hydroxide In methanol; water | 99.1% |
In toluene for 16h; Heating / reflux; | 88% |
With hydrogenchloride for 2h; Reflux; | 73.62 g |
4,4'-dimethoxytrityl chloride
(3R)-4-chloro-1,3-butanediol
(3R)-4-chloro-1-(bis(4-methoxyphenyl)(phenyl)methoxy)-3-butanol
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 0℃; Inert atmosphere; | 90% |
p-toluenesulfonyl chloride
(3R)-4-chloro-1,3-butanediol
(R)-4-chloro-3-hydroxy-1-p-toluenesulfonyloxybutane
Conditions | Yield |
---|---|
With 2,6-dimethylpyridine at 0 - 20℃; for 15h; | 70.8% |
methyl (R)-4-chloro-3-hydroxybutyrate
p-toluenesulfonyl chloride
(3R)-4-chloro-1,3-butanediol
(R)-4-chloro-3-hydroxy-1-p-toluenesulfonyloxybutane
Conditions | Yield |
---|---|
With hydrogenchloride; triethylamine In ice-water; dichloromethane | 54% |
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