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:29745-04-8
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:29745-04-8
Min.Order:1 Metric Ton
Negotiable
Type:Manufacturers
inquiry1. Factory price and high quality must be guaranteed, base on 8 years of production and R&D experience2. Free samples will be provided,ensure specifications and quality are right for customer3. Customers will receive the most professional technical s
Cas:29745-04-8
Min.Order:1 Gram
FOB Price: $0.1
Type:Manufacturers
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:29745-04-8
Min.Order:1 Kilogram
FOB Price: $15.0 / 25.0
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:29745-04-8
Min.Order:10 Gram
FOB Price: $146.0 / 176.0
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 ♦ W
Cas:29745-04-8
Min.Order:1 Kilogram
FOB Price: $289.0 / 499.0
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
Cas:29745-04-8
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
Best 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:29745-04-8
Min.Order:0
Negotiable
Type:Manufacturers
inquiryChengdu Biopurify Phytochemicals Ltd. is a leading company in the research, development, manufacture and marketing of High Quality Phytochemicals and Extracts(especially Active Ingredients from Traditional Chinese Medicine,Traditional Chinese Medic
Cas:29745-04-8
Min.Order:0 Metric Ton
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:29745-04-8
Min.Order:0
Negotiable
Type:Lab/Research institutions
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:29745-04-8
Min.Order:10 Gram
Negotiable
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,
high purity,in stock Package:25kg/drum,or as per customers'demand Application:API,or Intermediates,fine chemicals Transportation:air,sea,courier
Cas:29745-04-8
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquirygood quality and cheap priceAppearance:powder Package:1kg,5kg,25kg Application:as raw material Transportation:by sea/air/courier
Acmec is a leading manufacturer and supplier of biochemical reagents and life science products. We have over 40,000 items in stock (real-time inventory) and offer discounted prices to registered members of the online store ( www.acmec.com.cn ) Appea
Cas:29745-04-8
Min.Order:1 bottle
Negotiable
Type:Lab/Research institutions
inquiryhigh quality Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea
Our clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS
Cas:29745-04-8
Min.Order:0
Negotiable
Type:Manufacturers
inquiryADVANTAGE:1. More than 3,000 Chinese medicine reference substances / standard products available from stock, issued on the same day, multiple cities can be delivered the next day2. The products are provided with COA, HPLC, NMR, quality assurance, pac
Exo-7-Oxabicyclo[2.2.1]Heptene-2,3-Dicarboxylic AnhydrideAppearance:white to off-white crystalline powder Storage:Keep away of light,cool place Package:25kg/drum;200kg/drum Application:Organic Intermediates Transportation:Sea/air/courier
Cas:29745-04-8
Min.Order:0
Negotiable
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:29745-04-8
Min.Order:0
Negotiable
Type:Trading Company
inquiryFactory supply high purity low priceAppearance:solid or liquid Storage:sealed in cool and dry place Package:As customer's requested Application:Pharma Intermediate Transportation:by courier/air/sea Port:Any port in China
4,7-Epoxyisobenzofuran-1,3-dione,hexahydro-, (3aR,4S,7R,7aS)-rel- cas 29745-04-8Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express
Cas:29745-04-8
Min.Order:0
Negotiable
Type:Other
inquiryBest quality with low priceAppearance:solid Storage:ln stock Package:25kg/Barrel Application:Chemicals Transportation:Express/Sea/Air Port:Shanghai
good quality, competitive price, thoughtful after sale serviceAppearance:white powder Storage:Keep it in dry,shady and cool place Package:1g Application:Pharma;Industry;Agricultural;chemical reaserch Transportation:by express or by sea Port:Any port
Cas:29745-04-8
Min.Order:0
Negotiable
Type:Trading Company
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
factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
Cas:29745-04-8
Min.Order:0
Negotiable
Type:Trading Company
inquiry1: Fast and guaranteed shipment (TNT;EMS;FEDEX;DHL;UPS;EUB, special line) 2: Various payment terms accepted (Btc;MoneyGram;WU) 3: Valued package (Paraffin coating; Double aluminum foil bag; Vacuum packaging) 4: Efficient delivery (3-10 DAYS fast deli
Cas:29745-04-8
Min.Order:1 Kilogram
FOB Price: $7.0 / 10.0
Type:Trading Company
inquiryPrice, 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
Cas:29745-04-8
Min.Order:0
Negotiable
Type:Trading Company
inquiryWe are a leading supplier of phytochemical reference standards.We are confidant that we will assure you of any quality problems and provide you with competitive price.In addition, if you ordered, we can send you products first with Net 30 days paym
Cas:29745-04-8
Min.Order:20 Milligram
Negotiable
Type:Lab/Research institutions
inquiryexo-3,6-epoxy-1,2,3,6-tetrahydrophthalic anhydride
norcantharidin
Conditions | Yield |
---|---|
With hydrogen; palladium on activated charcoal; water In tetrahydrofuran Ambient temperature; | 100% |
With hydrogen; palladium on activated charcoal In tetrahydrofuran at 23℃; | 100% |
With hydrogen; palladium on activated charcoal In tetrahydrofuran at 20℃; for 4h; | 100% |
Conditions | Yield |
---|---|
In toluene at 80℃; for 6h; | 87% |
With hydrogen; palladium Multistep reaction; | |
Stage #1: furan; maleic anhydride In diethyl ether at 20℃; for 24h; Diels-Alder addition; Stage #2: With hydrogen; palladium on activated charcoal under 3040.2 Torr; for 72h; Further stages.; |
endothall
norcantharidin
Conditions | Yield |
---|---|
Erhitzen unter vermindertem Druck; | |
With acetyl chloride for 1.5h; Heating; | |
durch Sublimation unter vermindertem Druck; |
norcantharidin
Conditions | Yield |
---|---|
With colloid; sodium carbonate; palladium Hydrogenation; |
Conditions | Yield |
---|---|
palladium-carbon In dichloromethane; ethyl acetate | |
palladium-carbon In dichloromethane; ethyl acetate | 1.69 g (8.61 mmol, 84%) |
4,10-dioxatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
norcantharidin
Conditions | Yield |
---|---|
With palladium 10% on activated carbon; hydrogen In ethyl acetate; acetone under 2585.81 Torr; for 16h; | 7.2 g |
Conditions | Yield |
---|---|
With triethylamine In toluene for 36h; Heating; | 98% |
methanol
norcantharidin
(1S,2R,3S,4R)-3-(methoxycarbonyl)-7-oxabicyclo[2.2.1]heptane-2-carboxylic acid
Conditions | Yield |
---|---|
With C28H27F6N3O3S In tetrahydrofuran at 25℃; for 26h; Inert atmosphere; | 98% |
With 1-(3,5-bis(trifluoromethyl)phenyl)-3-((1S,2R)-3-(tert-butyldimethylsilyloxy)-2-(dimethylamino)-1-(4-nitrophenyl)propyl)thiourea In tert-butyl methyl ether at 20℃; for 96h; Inert atmosphere; optical yield given as %ee; enantioselective reaction; | 88% |
With C26H34F6N4O3SSi In tert-butyl methyl ether at 20℃; for 48h; Inert atmosphere; enantioselective reaction; | 85% |
N-(m-chlorophenyl)piperazine
norcantharidin
Conditions | Yield |
---|---|
Stage #1: N-(m-chlorophenyl)piperazine; norcantharidin With dmap; triethylamine In dichloromethane at 20℃; Inert atmosphere; Stage #2: With diisopropyl-carbodiimide In dichloromethane at 20℃; Inert atmosphere; Cooling with ice; | 98% |
norcantharidin
Conditions | Yield |
---|---|
With sodium sulfide; cetyltrimethylammonim bromide In dichloromethane; water | 97% |
Conditions | Yield |
---|---|
In ethanol; water for 48h; Reflux; | 97% |
Conditions | Yield |
---|---|
With dmap In dichloromethane at 60℃; for 14h; Sealed tube; Inert atmosphere; | 97% |
1-methyl-piperazine
norcantharidin
Conditions | Yield |
---|---|
at 85.1 - 97.1℃; for 21h; Temperature; Inert atmosphere; Large scale; | 95.4% |
In tetrahydrofuran at 20℃; |
methanol
norcantharidin
7-oxabicyclo[2.2.1]heptane-2,3-dicarboxylic acid monomethyl ester
Conditions | Yield |
---|---|
for 18h; Heating; | 95.1% |
for 3.5h; Reflux; | 95% |
for 3.5h; Reflux; | 95% |
Heating; |
Conditions | Yield |
---|---|
In ethanol; water for 48h; Reflux; | 95% |
4-(4-fluorophenyl)thiosemicarbazide
norcantharidin
Conditions | Yield |
---|---|
In chloroform for 1h; Reflux; | 95% |
1-(4-aminobutyl)-4-(1,2-benzisothiazol-3-yl)piperazine
norcantharidin
Conditions | Yield |
---|---|
With pyridine for 4.5h; Heating; | 94.8% |
isobutylamine
norcantharidin
Conditions | Yield |
---|---|
Stage #1: isobutylamine; norcantharidin With dmap In dichloromethane at 20℃; for 1h; Inert atmosphere; Stage #2: With ammonia; diisopropyl-carbodiimide In dichloromethane at -34 - 20℃; for 4h; Inert atmosphere; Cooling with ice; | 94% |
N-butylamine
norcantharidin
N-butyl-7-oxabicyclo(2.2.1)heptane-2,3-dicarboximide
Conditions | Yield |
---|---|
With triethylamine In toluene for 36h; Heating; | 93% |
(i), (ii) (heating); Multistep reaction; |
p-aminoethylbenzoate
norcantharidin
Conditions | Yield |
---|---|
In tetrahydrofuran at 20℃; for 48h; | 93% |
N-ethylthiosemicarbazide
norcantharidin
Conditions | Yield |
---|---|
In chloroform for 1h; Reflux; | 93% |
benzylamine
norcantharidin
cis-4-benzyl-10-oxa-4-azatricyclo<5.2.1.0>decane-3,5-dione
Conditions | Yield |
---|---|
With triethylamine In toluene for 36h; Heating; | 91% |
(i), (ii) (heating); Multistep reaction; | |
With acetyl chloride 1.) THF, 4 h, 2.) reflux, 4 h; Yield given. Multistep reaction; |
3-amino-2-methoxypropan-1-ol
norcantharidin
Conditions | Yield |
---|---|
With triethylamine In toluene for 36h; Heating / reflux; | 91% |
Conditions | Yield |
---|---|
With triethylamine In 5,5-dimethyl-1,3-cyclohexadiene at 20 - 120℃; for 4.5h; Inert atmosphere; | 90% |
diisobutylamine
norcantharidin
Conditions | Yield |
---|---|
Stage #1: diisobutylamine; norcantharidin With dmap In dichloromethane at 20℃; for 1h; Inert atmosphere; Stage #2: With ammonia; diisopropyl-carbodiimide In dichloromethane at -34 - 20℃; for 4h; Inert atmosphere; Cooling with ice; | 90% |
Conditions | Yield |
---|---|
Stage #1: diisobutylamine; norcantharidin With dmap In dichloromethane at 20℃; Inert atmosphere; Stage #2: isobutylamine With diisopropyl-carbodiimide In dichloromethane for 5h; Inert atmosphere; Cooling with ice; | 90% |
2-amino-benzthiazole
norcantharidin
Conditions | Yield |
---|---|
With triethylamine In tetrahydrofuran at 20℃; for 14h; | 89% |
ethanol
norcantharidin
3-(ethoxycarbonyl)-7-oxabicyclo[2.2.1]heptane-2-carboxylic acid
Conditions | Yield |
---|---|
for 12h; Reflux; | 88.9% |
1,4-bis(bromomagnesium)butane
norcantharidin
2',6'-exo-spirodioxatricyclo<5.2.1.02,6>decan-3'-one>
Conditions | Yield |
---|---|
In tetrahydrofuran for 2h; | 88% |
methanol
norcantharidin
(-)-2-exo-(methoxycarbonyl)-7-oxabicyclo<2.2.1>heptane-3-exo-carboxylic acid
Conditions | Yield |
---|---|
With 1,4-bis(dihydroquinidinyl)anthraquinone In diethyl ether at -20℃; | 88% |
With hydroquinidine (anthraquinone-1,4-diyl) diether In diethyl ether at -20℃; for 120h; optical yield given as %ee; enantioselective reaction; | 88 %Spectr. |
Methyl 3-aminobenzoate
norcantharidin
Conditions | Yield |
---|---|
In tetrahydrofuran at 20℃; | 88% |
m,p-dichloroaniline
norcantharidin
Conditions | Yield |
---|---|
With triethylamine In tetrahydrofuran at 20℃; for 14h; | 88% |
norcantharidin
endothall
Conditions | Yield |
---|---|
With sodium hydroxide; water for 24h; Ambient temperature; | 87% |
With potassium hydroxide | |
With water |
hexan-1-amine
norcantharidin
2-hexyl-(3at,7at)-hexahydro-4r,7c-epioxido-isoindole-1,3-dione
Conditions | Yield |
---|---|
With triethylamine In toluene for 36h; Heating; | 87% |
(i), (ii) (heating); Multistep reaction; |
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