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:2689-68-1
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:2689-68-1
Min.Order:1 Metric Ton
Negotiable
Type:Manufacturers
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:2689-68-1
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryBest quality & Attractive price & Professional service; Trial & Pilot & Commercial Hisunny Chemical is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality intermediates, specia
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Manufacturers
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:2689-68-1
Min.Order:4 Kilogram
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:2689-68-1
Min.Order:0
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:2689-68-1
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
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
Cas:2689-68-1
Min.Order:0 Metric Ton
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Type:Manufacturers
inquiryWe Huarong Pharm can provide Customized Synthesis & Process R&D & APIs and intermediates Production & Quality Research & Registration Application, especially our GMP validation service which complies with SFDA, FDA, WHO and EU EMPA. O
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Trading Company
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:2689-68-1
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryStock products, own laboratory Package:Grams, Kilograms Application:For R&D Transportation:According to customer request Port:Shanghai
Cas:2689-68-1
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:2689-68-1
Min.Order:0
Negotiable
Type:Other
inquiryOur clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Manufacturers
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 product spec
Cas:2689-68-1
Min.Order:0
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Type:Lab/Research institutions
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:2689-68-1
Min.Order:0
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Type:Lab/Research institutions
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:Chemical intermediate
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Trading Company
inquiryMethyl 4-oxotetrahydrothiophene-3-carboxylate cas 2689-68-1Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Other
inquirygood quality, competitive price, thoughtful after sale serviceAppearance:white powder Storage:Keep it in dry,shady and cool place Package:250mg Application:Pharma;Industry;Agricultural;chemical reaserch Transportation:by express or by sea Port:Any po
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Trading Company
inquiryStock products, own laboratory Package:Grams, Kilograms Application:For R&D Transportation:According to customer request Port:Shanghai
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Other
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:any port in China
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Trading Company
inquiryHigh quality suppliers Application:healing drugs
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryfactory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Trading Company
inquiryOur mission is to provide high-quality and innovative products to our customers. By offering a broad range of products, custom synthesis and personalized services, Bide can help scientists speeding up their research in the chemical and pharmaceutical
Cas:2689-68-1
Min.Order:0
Negotiable
Type:Other
inquiry1.Professional synthesis laboratory and production base. 2.Strong synthesis team and service team. 3.Professional data management system. 4.We provide the professional test date and product information ,ex. HNMR ,CNMR,FNMR, HPLC/G
Cas:2689-68-1
Min.Order:10 Milligram
Negotiable
Type:Lab/Research institutions
inquiryProduct quality is guaranteed , Provide HNMR \ GC\ HPLC data Appearance:white to light yellow powder Storage:Sealed in dry,Room Temperature Package:25 kg cardboard barrels Application:lab or industry material Transportation:By air Po
Cas:2689-68-1
Min.Order:1 Kilogram
FOB Price: $1.0
Type:Manufacturers
inquiryOur Advantage 1.Best quality with competitive price. 2.Quick shipping,delivery on time. 3.We have a pharmaceutical raw material production plant and a reagent R&D center. 4.Support multiple trading methods and payment.We support wire transfer
Cas:2689-68-1
Min.Order:1 Kilogram
FOB Price: $6.8 / 8.6
Type:Trading Company
inquiryBetterbiochem is specialized in APIs, pharmaceutical intermediates & fine chemicals. 1. The best quality, competitive price. 2. The best service before or after shipment. 3. Rich experience in export operation. 4. Rich experience in
Cas:2689-68-1
Min.Order:1 Gram
Negotiable
Type:Lab/Research institutions
inquiryFor quick quotation, please send us the inquiry include CAS#, Structure, Chemical Name, quantity, purity, as well as any additional specifications you require, we will try to get back to you within 24 hours. Our Services Besides manufacturing,
Cas:2689-68-1
Min.Order:0
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Type:Lab/Research institutions
inquiryBaiFuChem is a Professional chemical raw material supplier in China, our main products include Biochemical , Pharma Intermediate and Organic chemical etc. BaiFuChem have wealth of products,experience , expertise and state-of-the-art
Cas:2689-68-1
Min.Order:1 Kilogram
Negotiable
Type:Other
inquiryYinghao Pharm products include: leader molecule, heterocyclic compounds,chiral compounds, photoelectric materials, biochemical reagents etc. For example:benzene, pyrimidine, boricacid,pyridine, pyrazole, imidazole, pyrrole, fluorine and other derivat
Cas:2689-68-1
Min.Order:0
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Type:Lab/Research institutions
inquirymethyl 4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With hydrogenchloride In water pH=Ca. 5; | 82% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With lithium methanolate; acetic acid In methanol; hexane; water | 81% |
Conditions | Yield |
---|---|
With pyridine In toluene at 80℃; for 2.5h; | 80% |
With lithium methanolate In methanol; toluene at 70 - 110℃; | 53.7% |
Stage #1: dimethyl-3-thiaadipate With sodium methylate In tetrahydrofuran at 20℃; for 2.08333h; Reflux; Stage #2: With hydrogenchloride In tetrahydrofuran; water | 39% |
Methyl thioglycolate
acrylic acid methyl ester
A
methyl tetrahydrothiophen-3-one-2-carboxylate
B
methyl 4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With sodium hydride at -40℃; for 5h; | A 57% B 42% |
With sodium hydride at -40℃; for 5h; Product distribution; var.: temp.: 0 degC; | A 57% B 42% |
dimethyl-3-thiaadipate
A
methyl tetrahydrothiophen-3-one-2-carboxylate
B
methyl 4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With sodium methylate In methanol for 0.666667h; Heating / reflux; | A n/a B 54% |
With methanol; sodium for 0.666667h; Heating / reflux; | A n/a B 54% |
With sodium methylate In diethyl ether for 3h; Heating; | A 44% B 18% |
With lithium methanolate In toluene at 70 - 110℃; for 18.5h; | A n/a B 33% |
With sodium hydride In 1,2-dimethoxyethane at -40℃; Inert atmosphere; |
acrylic acid methyl ester
methyl 4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
Stage #1: Methyl thioglycolate With sodium methylate In methanol at 20℃; for 3h; Stage #2: acrylic acid methyl ester In dimethyl sulfoxide at 0 - 20℃; for 18h; Michael addition; Dieckmann cyclization; Stage #3: With hydrogenchloride In water; dimethyl sulfoxide | 48% |
dimethyl thiodiglycolate
methyl 4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With sodium hydride In tetrahydrofuran; mineral oil for 5h; Reflux; | 35% |
A
methyl 4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With sodium; benzene |
methyl 4-oxotetrahydrothiophene-3-carboxylate
4-hydroxyimino-tetrahydro-thiophene-3-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With hydroxylamine hydrochloride; barium carbonate In methanol Heating / reflux; | 98% |
With hydroxylamine hydrochloride; barium carbonate In methanol for 12h; Reflux; | 98% |
diazomethane
methyl 4-oxotetrahydrothiophene-3-carboxylate
methyl 2,5-dihydro-4-methoxythiophene-3-carboxylate
Conditions | Yield |
---|---|
97% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
toluene-4-sulfonic acid hydrazide
methyl 2,5-dihydro-4-(N'-tosylhydrazino)thiophene-3-carboxylate
Conditions | Yield |
---|---|
With hydrogenchloride In ethanol for 0.5h; Ambient temperature; | 95% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
3-methylthio-5-methylamino-1H-1,2,4-triazole
2-methylthio-9-methyl-5,7-dihydrothieno<3,4-e>-1,2,4-triazolo<1,5-a>pyrimidin-8(9H)-one
Conditions | Yield |
---|---|
at 160℃; for 0.0833333h; | 93% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
methyl 4-aminothiophene-3-carboxylate
Conditions | Yield |
---|---|
With hydroxylamine hydrochloride In methanol for 1h; Reflux; | 93% |
Conditions | Yield |
---|---|
With potassium carbonate In acetone at 65℃; for 1h; | 92% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
p-toluenesulfonyl chloride
methyl 2,5-dihydro-4-(p-toluenesulfonato)thiophene-3-carboxylate
Conditions | Yield |
---|---|
With 4-methyl-morpholine In dichloromethane for 1.5h; Cooling with ice; | 88.5% |
With 4-methyl-morpholine In dichloromethane at 10℃; for 1.5h; | 85% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
methyl vinyl ketone
methyl 4-oxo-3-(3-oxobutyl)tetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
Stage #1: methyl 4-oxotetrahydrothiophene-3-carboxylate With iron(III) chloride hexahydrate In dichloromethane at 23℃; for 0.0833333h; Stage #2: methyl vinyl ketone In dichloromethane at 20℃; for 48h; Michael Addition; | 88% |
With triphenylphosphine In acetonitrile for 5h; Ambient temperature; | 73% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
1,2-diamino-benzene
3-(2-aminoanilino)-4-(carbomethoxy)-2,5-dihydrothiophene
Conditions | Yield |
---|---|
With acetic acid In ethanol for 4h; Heating; | 86% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
3-(4-Nitro-benzyl)-4-oxo-tetrahydro-thiophene-3-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With potassium carbonate In acetone Heating; | 86% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
3-(4-Nitro-benzyl)-4-oxo-tetrahydro-thiophene-3-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With potassium carbonate In acetone Heating; | 86% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
4-hydroxythiophene-3-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With dihydrogen peroxide In methanol for 2h; | 85% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
3-Ethoxycarbonylmethyl-4-oxo-tetrahydro-thiophene-3-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With potassium carbonate In acetone Heating; | 85% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
2-ethylisothiourea hydrobromide
5H,7H-2-ethylthiodihydrothieno<3,4-d>pyrimidin-4-one
Conditions | Yield |
---|---|
With sodium carbonate In water at 25℃; for 18h; Darkness; | 84.6% |
With sodium carbonate for 12h; Ambient temperature; | 83% |
With sodium carbonate In water at 20℃; Darkness; |
Conditions | Yield |
---|---|
With boron trifluoride diethyl etherate In toluene for 4h; Heating; | 84% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
tert-butyldimethylsilyl chloride
4-(tert-Butyl-dimethyl-silanyloxy)-2,5-dihydro-thiophene-3-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With triethylamine | 82% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
methyl 3-allyl-4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With potassium carbonate In acetone Heating; | 81% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
3-ethyl 3a-methyl 1-[(anilinocarbonyl)amino]-6a-hydroxy-2-methyl-6,6a-dihydro-1H-thieno[3,4-b]pyrrole-3,3a(4H)-dicarboxylate
Conditions | Yield |
---|---|
With sodium hydride In tetrahydrofuran at 20℃; for 5.5h; | 81% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
methyl 3-benzyl-4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With potassium carbonate In acetone Heating; | 80% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
methyl 3-benzyl-4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With potassium carbonate In acetone Heating; | 80% |
sodium cyanide
methyl 4-oxotetrahydrothiophene-3-carboxylate
3-cyano-3-hydroxy-tetrahydrothiophene-4-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With sodium hydrogensulfite In methanol; water at 20℃; for 16h; pH=7 - 8; Time; | 80% |
Stage #1: sodium cyanide With sodium hydrogensulfite In water Cooling with ice; Stage #2: methyl 4-oxotetrahydrothiophene-3-carboxylate In methanol; water at 20℃; for 16h; |
methyl 4-oxotetrahydrothiophene-3-carboxylate
5-amino-1-(2-amino-4-trifluoromethylphenyl)-3-methylthio-1H-1,2,4-triazole
4,5-dihydro-2-methylthio-8-trifluoromethyl-1,2,4-triazolo<1,5-a>-1,3,5-benzotriazepin-5(6H)-one
Conditions | Yield |
---|---|
for 3h; Product distribution; Mechanism; Heating; | 79% |
for 3h; Heating; | 79% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
methyl 4-oxo-3-(propargyl)tetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With potassium carbonate In acetone Heating; | 79% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
3-((Z)-2-Ethoxy-3-ethoxycarbonyl-allyl)-4-oxo-tetrahydro-thiophene-3-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With potassium carbonate In acetone Heating; | 79% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
methyl 3-allyl-4-oxotetrahydrothiophene-3-carboxylate
Conditions | Yield |
---|---|
With potassium carbonate In acetone Heating; | 78% |
methyl 4-oxotetrahydrothiophene-3-carboxylate
3-Ethoxycarbonylmethyl-4-oxo-tetrahydro-thiophene-3-carboxylic acid methyl ester
Conditions | Yield |
---|---|
With potassium carbonate In acetone Heating; | 78% |
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