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:15481-39-7
Min.Order:1 Kilogram
FOB Price: $3.0
Type:Lab/Research institutions
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:15481-39-7
Min.Order:1 Kilogram
FOB Price: $139.0 / 210.0
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:15481-39-7
Min.Order:1 Gram
Negotiable
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:15481-39-7
Min.Order:1 Kilogram
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:15481-39-7
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryOur company was built in 2009 with an ISO certificate.In the past 5 years, we have grown up as a famous fine chemicals supplier in China and we had established stable business relationships with Samsung, LG, Merck, Thermo Fisher Scientific and so o
Cas:15481-39-7
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:15481-39-7
Min.Order:1 Metric Ton
FOB Price: $7.0 / 8.0
Type:Trading Company
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
high 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:15481-39-7
Min.Order:0
Negotiable
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:15481-39-7
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryWe are committed to providing our customers with the best products and services at the most competitive prices.Appearance:White to beige crystals Storage:Room temperature with sealed well Package:according to the clients requirement Application:Use a
Supply top quality products with a reasonable price Application:api
p-Dioxane, compd. with bromine (1:1) cas 15481-39-7Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express
Cas:15481-39-7
Min.Order:0
Negotiable
Type:Other
inquiryGood Quality Package:1kg/bag Application:Medical or chemical Transportation:Air/Train/Sea Port:Shenzhen
factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
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
Conditions | Yield |
---|---|
at 20℃; for 2h; Cooling with ice; | 65% |
1,4-dioxane
dioxane dibromide
Conditions | Yield |
---|---|
With bromine at 0 - 23℃; for 3h; | 57% |
With bromine | |
With bromine | 10 g |
oxirane
dioxane dibromide
Conditions | Yield |
---|---|
With bromine im geschlossenen Gefaess; |
dioxane dibromide
2,4-diethoxy-3-methylphenol
6-bromo-2,4-diethoxy-3-methylphenol
Conditions | Yield |
---|---|
With potassium carbonate In dichloromethane at -78 - 20℃; for 0.916667h; | 88% |
dioxane dibromide
3-bromo-7-(2,3-dibromo-3-phenylpropoxy)-4-methylcoumarin
Conditions | Yield |
---|---|
at 0 - 20℃; for 4h; Neat (no solvent); regioselective reaction; | 86% |
4-methyl-7-methoxy-2H-1-benzopyran-2-one
dioxane dibromide
3-bromo-7-methoxy-4-methylcoumarin
Conditions | Yield |
---|---|
at 0 - 20℃; for 2h; Neat (no solvent); regioselective reaction; | 85% |
7-hydroxy-4-methyl-chromen-2-one
dioxane dibromide
3-bromo-7-hydroxy-4-methyl-chromen-2-one
Conditions | Yield |
---|---|
at 0 - 20℃; for 3h; Neat (no solvent); regioselective reaction; | 84% |
4-methyl-2H-chromen-2-one
dioxane dibromide
3-bromo-4-hydroxycoumarin
Conditions | Yield |
---|---|
at 0 - 20℃; for 2h; Neat (no solvent); regioselective reaction; | 83% |
Conditions | Yield |
---|---|
at 0 - 20℃; for 0.5h; Neat (no solvent); regioselective reaction; | 83% |
bis[4,6-di-tert-butyl-N-(2,6-diisopropylphenyl)-o-amidophenolato]tin(IV) tetrahydrofuratate
dioxane dibromide
Conditions | Yield |
---|---|
In acetonitrile exclusion of air and moisture; soln. of Br2*diox (1 mmol) in MeCN added dropwise to soln. of Sn complex (1 mmol) in MeCN; soln. concd., stored at -12°C for 12 h, crystals isolated; elem. anal.; | 82.3% |
dioxane dibromide
Conditions | Yield |
---|---|
In dichloromethane (N2); using Schlenk techniques; addn. of excess of Br2*C4H8O2 to soln. of (η5-C5H4Me)4Fe4(HCCH)2 in CH2Cl2 at room temp. under constant stirring; pptn., filtration, washing with CH2Cl2, extn. with MeCN; removal of solvent, elem. anal.; | 79% |
7-hydroxy-2H-chromen-2-one
dioxane dibromide
3-bromo-7-hydroxy-2H-1-benzopyran-2-one
Conditions | Yield |
---|---|
at 0 - 20℃; for 2h; Neat (no solvent); regioselective reaction; | 79% |
7-methoxycoumarin
dioxane dibromide
3-bromo-7-methoxy-2H-chromen-2-one
Conditions | Yield |
---|---|
at 0 - 20℃; for 3h; Neat (no solvent); regioselective reaction; | 79% |
7-amino-4-methylcoumarin
dioxane dibromide
6-amino-5,7-dibromo-4-methylcoumarin
Conditions | Yield |
---|---|
at 0 - 20℃; for 2h; Neat (no solvent); regioselective reaction; | 77% |
Conditions | Yield |
---|---|
at 0 - 20℃; for 0.5h; Neat (no solvent); regioselective reaction; | 76% |
dioxane dibromide
7-propargyloxy-4-methyl-2H-chromen-2-one
3-bromo-7-(2,3-dibromoallyloxy)-4-methylcoumarin
Conditions | Yield |
---|---|
at 0 - 20℃; for 2h; Neat (no solvent); regioselective reaction; | 73% |
7-hydroxy-2H-chromen-2-one
dioxane dibromide
3,8-dibromo-7-hydroxycoumarin
Conditions | Yield |
---|---|
at 0 - 20℃; for 4h; Neat (no solvent); regioselective reaction; | 72% |
(3,6-di-tert-butylcatecholato)dichlorotin(IV) ditetrahydrofuranate
dioxane dibromide
Conditions | Yield |
---|---|
In acetonitrile a soln. of Br compd. added dropwise to a soln. of Sn compd.; concd., stored at -12°C overnight; elem. anal., TGA; | 72% |
(3,6-di-tert-butylcatecholato)dichlorotin(IV) ditetrahydrofuranate
dioxane dibromide
Conditions | Yield |
---|---|
In acetonitrile a soln. of Br compd. added dropwise to a soln. of Sn compd.; concd., stored at -12°C overnight; elem. anal., TGA; | 71% |
Conditions | Yield |
---|---|
In diethyl ether under Ar; to Nb complex was added a soln. of Br2*O2C4H8 (1 equiv.) in ether, the mixt. was stirred overnight at 25°C; the mixt. was filtered, the volatiles were removed; Nb(C5H5)2H(Si(CH3)2((2)H)(Si(CH3)2Br) was observed only by NMR; | A 70% B n/a |
Conditions | Yield |
---|---|
at 0 - 20℃; for 1h; Neat (no solvent); regioselective reaction; | 70% |
Conditions | Yield |
---|---|
In tetrahydrofuran at -78℃; | 66% |
Conditions | Yield |
---|---|
at 0 - 20℃; for 1h; Neat (no solvent); regioselective reaction; | 62% |
7-allyloxy-4-methyl-2H-chromen-2-one
dioxane dibromide
3-bromo-7-(2,3-dibromopropoxy)-4-methylcoumarin
Conditions | Yield |
---|---|
at 0 - 20℃; for 4h; Neat (no solvent); regiospecific reaction; | 56% |
Conditions | Yield |
---|---|
anaerobic and anhydrous conditions; 0.5 equiv. of Br2*dioxane; | 44% |
1-phenyl-2,8,9-trioxa-5-aza-1-silabicyclo{3.3.3}undecane
dioxane dibromide
A
1-bromosilatrane
Conditions | Yield |
---|---|
In dichloromethane at 20℃; Substitution; | A 39% B 11.7% |
Conditions | Yield |
---|---|
In dichloromethane at 20℃; Substitution; | A 16.4% B 14.6% |
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