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
1. 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:500-62-9
Min.Order:1 Gram
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Type:Manufacturers
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
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inquiry1. Product advantages ♦ High purity, all above 98.5%, no impurities after the dissolution ♦ We will test each batch to ensure quality ♦ OEM and private brand services designed for free ♦ Various cap colors available &diam
Cas:500-62-9
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FOB Price: $7.0 / 10.0
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:500-62-9
Min.Order:1 Kilogram
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Type:Lab/Research institutions
inquiryYANGONIN CAS:500-62-9 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing in high quality organic intermediates, ste
Cas:500-62-9
Min.Order:1 Gram
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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:500-62-9
Min.Order:1 Kilogram
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Type:Lab/Research institutions
inquiry1.High Quality: Quality is life. Quality is the most important element for all goods. We have a lab doing research in Wuhan China and produce sarms in bulk quantity. We have 8 years experience making all kinds of sarms. And all our old customers
Cas:500-62-9
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:500-62-9
Min.Order:0
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Type:Lab/Research institutions
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:500-62-9
Min.Order:10 Kilogram
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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
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
The 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
Packing: According to customer requirements Delivery time: In stock or depands Port of shipment: Ningbo/Shanghai/Qingdao OEM/ODM:Welcome Sample:We can offer our existing samples at once Transportation:Express/Sea/Air Port:Ningbo/Shanghai/Qingd
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:500-62-9
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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
factory?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:500-62-9
Min.Order:1 Kilogram
FOB Price: $18.0 / 20.0
Type:Trading Company
inquiryHubei CuiRan Biotechnology Co., 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 Medicine)
Shandong 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:500-62-9
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:500-62-9
Min.Order:1 Metric Ton
FOB Price: $1.5
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:500-62-9
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Type:Trading Company
inquiryThe quality is guaranteed. If you find the product is wrong compared with COA, we promise 100% refund or change product. COA and HPLC will be shipped out with goods. You can also inform your analysis method and we will follow your analysis method
Lower 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
high 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
1.A strong technical force and advanced processing equipments. The quality of the products has been strictly inspected and all kinds of index have reached or exceeded domestic and international standards.2. Now we have established long-term stable re
Why is SINOWAY:1) Specialized in pharmaceutical and healthcare industrial since 19872) ISO 9001:2015 & SGS audited supplier . 3) Accept various payment terms : T.T 30-60 days.4) We have warehouse in USA with quickly shipment . Application:Herbal extr
Cas:500-62-9
Min.Order:0
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Type:Trading Company
inquiryhigh purity, manufacturer Application:Intermediate
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:500-62-9
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
ADVANTAGE: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
4-methoxy-6-vinyl-2H-pyran-2-one
4-methoxybenzenediazonium tetrafluoroborate
yangonin
Conditions | Yield |
---|---|
Stage #1: 4-methoxy-6-vinyl-2H-pyran-2-one With sodium acetate; palladium diacetate In acetonitrile for 0.166667h; Heck-Matsuda reaction; Stage #2: 4-methoxybenzenediazonium tetrafluoroborate In acetonitrile Heck-Matsuda reaction; | 96% |
(4-Methoxy-2-oxo-2H-pyran-6-yl)methyltriphenylphosphonium Bromide
4-methoxy-benzaldehyde
yangonin
Conditions | Yield |
---|---|
With sodium ethanolate In ethanol; N,N-dimethyl-formamide for 16h; Ambient temperature; | 95% |
(E)-4-methoxy-6-(4-methoxystyryl)-5,6-dihydro-2H-pyran-2-one
yangonin
Conditions | Yield |
---|---|
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In benzene for 2h; Inert atmosphere; Reflux; | 85% |
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In toluene for 2h; Inert atmosphere; Reflux; | 85% |
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In benzene for 2h; Reflux; | 80% |
With 2,3-dicyano-5,6-dichloro-p-benzoquinone In tetrahydrofuran for 0.5h; Reflux; | 303.5 mg |
Conditions | Yield |
---|---|
With triisopropylamine In dichloromethane at -78 - 20℃; for 2h; | 65% |
Conditions | Yield |
---|---|
With potassium tert-butylate In N,N-dimethyl-formamide at 25℃; for 48h; Aldol Condensation; | 61% |
With magnesium methanolate Inert atmosphere; Reflux; | 59% |
With magnesium In methanol for 4h; Reflux; | 30% |
diazomethane
6-(4-methoxy-trans-styryl)-pyran-2,4-dione
A
2-methoxy-6-<2-(4-methoxyphenyl)ethenyl>pyran-4-one
B
yangonin
Conditions | Yield |
---|---|
With diethyl ether |
Conditions | Yield |
---|---|
With potassium carbonate In N,N-dimethyl-formamide for 18h; Ambient temperature; Yield given; |
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: 1.) COCl2, 2.) triethylamine / 1.) RT, 18 h, 2.) petroleum ether, CH2Cl2, 0 deg C, 30 min 2: 53 percent / 60 percent NaH, 1.46 M n-BuLi / tetrahydrofuran; hexane / 20 min, rt; 0 deg C, 10 min; 0 deg C, 1-2 h 3: 1.) TFA, 2.) acetic anhydride / 1.) CH2Cl2, rt, 1 h, 2.) rt, 18 h 4: K2CO3 / dimethylformamide / 18 h / Ambient temperature View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 53 percent / 60 percent NaH, 1.46 M n-BuLi / tetrahydrofuran; hexane / 20 min, rt; 0 deg C, 10 min; 0 deg C, 1-2 h 2: 1.) TFA, 2.) acetic anhydride / 1.) CH2Cl2, rt, 1 h, 2.) rt, 18 h 3: K2CO3 / dimethylformamide / 18 h / Ambient temperature View Scheme |
(E)-tert-butyl 3,5-dioxo-7-(p-methoxyphenyl)hept-6-enoate
yangonin
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 1.) TFA, 2.) acetic anhydride / 1.) CH2Cl2, rt, 1 h, 2.) rt, 18 h 2: K2CO3 / dimethylformamide / 18 h / Ambient temperature View Scheme |
6-(bromomethyl)-4-methyl-2H-pyran-2-one
yangonin
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 92 percent / benzene / 16 h / Heating 2: 95 percent / sodium ethoxide / dimethylformamide; ethanol / 16 h / Ambient temperature View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 4 steps 1: potassium carbonate / acetone / Inert atmosphere; Reflux 2: selenium(IV) oxide / 1,4-dioxane / 5 h / 180 °C / Inert atmosphere; Sealed tube 3: n-butyllithium; methyl-triphenylphosphonium iodide / tetrahydrofuran / 3 h / -78 - 20 °C / Inert atmosphere 4: sodium acetate; palladium diacetate / acetonitrile / 0.17 h View Scheme | |
Multi-step reaction with 2 steps 1: potassium carbonate / dimethyl sulfoxide / 20 °C 2: magnesium methanolate / methanol / 60 °C View Scheme | |
Multi-step reaction with 2 steps 1: potassium carbonate / acetone / 20 °C 2: magnesium methanolate / Inert atmosphere; Reflux View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: selenium(IV) oxide / 1,4-dioxane / 5 h / 180 °C / Inert atmosphere; Sealed tube 2: n-butyllithium; methyl-triphenylphosphonium iodide / tetrahydrofuran / 3 h / -78 - 20 °C / Inert atmosphere 3: sodium acetate; palladium diacetate / acetonitrile / 0.17 h View Scheme |
4-methoxy-6-vinyl-5,6-dihydro-2H-pyran-2-one
yangonin
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: Pd2(dba)4; sodium acetate / 1 h / 80 °C / Microwave irradiation 2: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 2 h / Inert atmosphere; Reflux View Scheme |
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