As a leading manufacturer and supplier of chemicals in China, DayangChem not only supply popular chemicals, but also DayangChem's R&D center offer custom synthesis services. DayangChem can provide different quantities of custom synthesis ch
Cas:21947-87-5
Min.Order:1 Kilogram
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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
Hebei yanxi chemical co. LTD. has expanded a compositive entity from initially only as a small manufacturer. The company dedicated to the development, production and marketing of chemicals. After many years of efforts, we have established stable
Cas:21947-87-5
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inquiryOur main production base is located in Xuzhou industry park. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place.Our R&D team masters core technology for process-design of target building block
Cas:21947-87-5
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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:21947-87-5
Min.Order:1 Kilogram
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Type:Trading Company
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 on.O
Cas:21947-87-5
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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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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
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
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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:21947-87-5
Min.Order:1 Kilogram
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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
high purity,in stock Package:25kg/drum,or as per customers'demand Application:API,or Intermediates,fine chemicals Transportation:air,sea,courier
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inquiryJinhua huayi chemical co., ltd. is dedicated to the development, production and marketing of chemicals. On the basis of equality and mutual benefit, and under the principle of customer first, credit first, quality first, we are ready to join hands
Cas:21947-87-5
Min.Order:100 Gram
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inquiryOur clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS
Ansciep 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
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inquiryAppearance: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
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inquiryDiisopinocampheylborane cas 21947-87-5Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express
Best quality with low price Storage:ln stock Package:25kg/Barrel Application:Chemicals Transportation:Express/Sea/Air Port:Shanghai
Cas:21947-87-5
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inquiry1. Timely and efficient service to ensure communication with customers2. Produce products of different specifications and sizes according to your requirements.3. Quality procedures and standards recognized by SGS. Advanced plant equipment ensures sta
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inquiryfactory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
1.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:21947-87-5
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inquiryChangzhou Extraordinary Pharmatech co., LTD. As a leading chemical manufacturer and supplier in China.DAS authentication is passed.We can provide the popular precursor chemicals, we have our own strong R & D team, have our own laboratories and fa
Cas:21947-87-5
Min.Order:1 Gram
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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 equ
Cas:21947-87-5
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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:21947-87-5
Min.Order:1 Gram
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inquiry1. Production capacity: we have three production base with high-tech production equipment and instruments, equipped with professional production personnel, meet your requirements.2. Quality assurance: we have a first-class testing equipment and testi
United Scientific Company Located in Shanghai of China , is a competitive player in the global specialty and fine chemical market. Fenghua has both the expertise and flexibility to produce a wide range of chemicals. Focusing on developing the innovat
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inquiryWith about ten years experiences in the field of pharmaceutical chemicals, Yierdechem has established solid business cooperation relationships with many large companys worldwide.As a leading supplier of API and pharmaceutical intermediates, holds its
please contact us to confirm the required quantity and quote, we will provide you with COA,NMR,HPLC and other relevant informationAppearance:Suspension Storage:Store in a cool place. Keep container tightly closed in a dry and well-ventilated place Pa
At Capot,We can synthesize and purify your complex molecules from 100 gram to 10 tons.Appearance:Clear colorless to light yellow liquid Storage:Dry,Seal and Cool place Package:1G,5G,10G,25G,100G,250G,500G,1KG,5KG,10KG,25KG,50KG,100KG,150KG,200KG. App
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inquiry(-)-α-pinene
L-diisopinocampheylborane
Conditions | Yield |
---|---|
With borane N-ethyl-N-isopropylaniline complex In 1,4-dioxane hydroboration; | 99% |
With dimethylsulfide borane complex In tetrahydrofuran at 20℃; Inert atmosphere; | 73% |
With sodium tetrahydroborate; boron trifluoride diethyl etherate |
(-)-α-pinene
dimethylsulfide borane complex
L-diisopinocampheylborane
Conditions | Yield |
---|---|
In tetrahydrofuran at 20℃; for 16h; Inert atmosphere; | 82% |
In tetrahydrofuran at 0℃; for 0.5h; | 60% |
In tetrahydrofuran at 0℃; for 0.5h; Inert atmosphere; | 52% |
In tetrahydrofuran | |
In tetrahydrofuran at 0℃; |
dimethylsulfide borane complex
(1R,5R)-(+)-β-pinene
L-diisopinocampheylborane
Conditions | Yield |
---|---|
In tetrahydrofuran pinene was slowly added to THF soln. of BMS at 0°C (N2); stirring for 2.5 h; evapn.; |
Conditions | Yield |
---|---|
In tetrahydrofuran at 0 - 20℃; for 2h; Inert atmosphere; stereoselective reaction; |
1-benzyl-3-methyl-1H-imidazol-3-ium iodide
L-diisopinocampheylborane
Conditions | Yield |
---|---|
With potassium hexamethylsilazane In tetrahydrofuran at 25℃; Inert atmosphere; Schlenk technique; | 83% |
benzaldehyde
L-diisopinocampheylborane
3-phenyl-1-(tributylstannyl)-1,2-propadiene
Conditions | Yield |
---|---|
In diethyl ether Sn compd. in Et2O treated with B compd. at 0°C for 5 h, C6H5CHO added at -78°C, stirred at -78°C for 8 h; NaHCO3 and H2O2 added at 0°C; 94 % ee; | 76% |
3-phenyl-propionaldehyde
L-diisopinocampheylborane
3-phenyl-1-(tributylstannyl)-1,2-propadiene
Conditions | Yield |
---|---|
In diethyl ether Sn compd. in Et2O treated with B compd. at 0°C for 5 h, C6H5(CH2)2CHO added at -78°C, stirred at -78°C for 8 h; NaHCO3 and H2O2 added at 0°C; 94 % ee; | 71% |
L-diisopinocampheylborane
Conditions | Yield |
---|---|
With potassium hexamethylsilazane In tetrahydrofuran at 25℃; Inert atmosphere; Schlenk technique; | 60% |
N-methyl-N'-phenyl imidazolium iodide
L-diisopinocampheylborane
Conditions | Yield |
---|---|
With potassium hexamethylsilazane In tetrahydrofuran at 25℃; Inert atmosphere; Schlenk technique; | 56% |
1,3-dimethylimidazolim iodide
L-diisopinocampheylborane
Conditions | Yield |
---|---|
With potassium hexamethylsilazane In tetrahydrofuran at 20℃; for 20h; Sealed tube; Inert atmosphere; Glovebox; | 37% |
With potassium hexamethylsilazane In tetrahydrofuran at 25℃; for 20h; Inert atmosphere; Schlenk technique; | 37% |
L-diisopinocampheylborane
Conditions | Yield |
---|---|
With potassium hexamethylsilazane In tetrahydrofuran at 20℃; for 20h; Sealed tube; Inert atmosphere; Glovebox; | 34% |
L-diisopinocampheylborane
Conditions | Yield |
---|---|
With potassium hexamethylsilazane In tetrahydrofuran at 25℃; Inert atmosphere; Schlenk technique; | 34% |
Conditions | Yield |
---|---|
With Pinene In tetrahydrofuran at -25℃; for 30h; asymmetric hydroboration; Title compound not separated from byproducts; |
Conditions | Yield |
---|---|
With Pinene In tetrahydrofuran at -25℃; for 76h; asymmetric hydroboration; Title compound not separated from byproducts; |
1-ethoxycyclopentene
L-diisopinocampheylborane
Conditions | Yield |
---|---|
With Pinene In tetrahydrofuran at -25℃; for 80h; asymmetric hydroboration; Title compound not separated from byproducts; |
Conditions | Yield |
---|---|
With Pinene In tetrahydrofuran at -15℃; for 120h; asymmetric hydroboration; Title compound not separated from byproducts; |
L-diisopinocampheylborane
Conditions | Yield |
---|---|
With Pinene In tetrahydrofuran at -10℃; for 72h; asymmetric hydroboration; Title compound not separated from byproducts; |
L-diisopinocampheylborane
2-allenyl-4,4,5,5-tetraphenyl-1,3,2-dioxaborolane
Conditions | Yield |
---|---|
In dichloromethane at 0℃; for 2.5h; | |
In dichloromethane at 0 - 23℃; |
L-diisopinocampheylborane
2-allenyl-[1,3,2]-dioxaborinane
Conditions | Yield |
---|---|
In dichloromethane at 0 - 20℃; |
L-diisopinocampheylborane
2-allenyl-4,4,5,5-tetraphenyl-1,3,2-dioxaborolane
Conditions | Yield |
---|---|
In dichloromethane at 0℃; for 2h; |
Conditions | Yield |
---|---|
In diethyl ether at 0℃; for 2h; | |
In tetrahydrofuran at 20℃; for 4h; Inert atmosphere; |
(R)-1-methoxy-4-((pent-4-yn-2-yloxy)methyl)benzene
L-diisopinocampheylborane
Conditions | Yield |
---|---|
In tetrahydrofuran at -35 - 20℃; for 2.5h; |
L-diisopinocampheylborane
B-allyldiisopinocampheylborane
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: diethyl ether / 2 h / 0 °C 2: diethyl ether / 1 h / 20 °C View Scheme |
L-diisopinocampheylborane
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: CH2Cl2 / 2 h / 0 °C 2: CH2Cl2 / 18 h / -78 °C View Scheme |
L-diisopinocampheylborane
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: CH2Cl2 / 2 h / 0 °C 2: CH2Cl2 / 2.5 h / -78 °C View Scheme |
Conditions | Yield |
---|---|
Norbornene is hydroborated with Ipc2BH at -25°C (83% ee).; |
L-diisopinocampheylborane
B-bromodiisopinocampheylborane
Conditions | Yield |
---|---|
With hydrogen bromide In pentane 0°C;; |
L-diisopinocampheylborane
B-iododiisopinocampheylborane
Conditions | Yield |
---|---|
With iodine In pentane 0°C;; |
L-diisopinocampheylborane
B-chlorodiisopinocampheylborane
Conditions | Yield |
---|---|
With hydrogenchloride In pentane 0°C;; |
Conditions | Yield |
---|---|
With sodium hydroxide; acetaldehyde In tetrahydrofuran mixt. of B compd. and pinene was kept at 0°C (N2) for 3 d; cooling to -25°C, addn. of cis-butene; stirring for 6 h; treatment with AcH with stirring at 25°C for 36 h, evapn., addn. of pentane, treatment with aq. NaOH; treatment with aq. HCl, extn. with Et2O, drying in vac.; |
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