Items Standard Result Assay (Ursolic acid) 98%min 98.22% ----------------------------------------------------------------
Cas:13991-36-1
Min.Order:1 Gram
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Type:Trading Company
inquiryhebei yanxi chemical co., LTD who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw materials, and a reagent r&d center, and we do research and developm
Cas:13991-36-1
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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:13991-36-1
Min.Order:1 Gram
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Type:Manufacturers
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:13991-36-1
Min.Order:5 Kiloliter
FOB Price: $1.2 / 5.0
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:13991-36-1
Min.Order:1 Kilogram
FOB Price: $3.0 / 10.0
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:13991-36-1
Min.Order:1 Kilogram
FOB Price: $139.0 / 210.0
Type:Trading Company
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:13991-36-1
Min.Order:1 Kilogram
Negotiable
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:13991-36-1
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
inquiry4-BROMOCROTONIC ACID CAS:13991-36-1 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 inte
Cas:13991-36-1
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:13991-36-1
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
inquiry1. Customs clearance 1) By Express: Normally there is no specical need for the recipient to clear the customs. If the customs has an objection,our rich experienced and professional group will help you clear the customs. 2) By Air and by Sea: Our
Cas:13991-36-1
Min.Order:20 Kilogram
FOB Price: $10.0 / 25.0
Type:Trading Company
inquiryProduct Name: 4-BROMOCROTONIC ACID Synonyms: gamma-Bromocrotonic acid;TRANS-4-BROMO-2-BUTENOIC ACID;2-Butenoic acid, 4-bromo-, (E)-;4-BroMobut-2-enoic acid;(2E)-4-Bromo-2-butenoic acid;(E)-4-Bromo-2-butenoic acid;gamma-Bromocrotonic acid, tech;4
Cas:13991-36-1
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:13991-36-1
Min.Order:0
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Type:Lab/Research institutions
inquiryTriumph has the complete production of G- KG - MT service chain,we can make the new technology into productivity quickly in the research and development of new products. Main Business Custom Synthesis: Trading(Raw Mater
Cas:13991-36-1
Min.Order:0 Metric Ton
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Type:Lab/Research institutions
inquiryWe are specialized in custom synthesis, chemical/pharmaceutical/ pesticides outsourcing and contract research. We are committed to provide excellence in researching, manufacturing and drug discovery process. Our research team of s
Cas:13991-36-1
Min.Order:100 Gram
FOB Price: $1.0
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:13991-36-1
Min.Order:0
Negotiable
Type:Lab/Research institutions
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
Cas:13991-36-1
Min.Order:10 Gram
FOB Price: $100.0
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:13991-36-1
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
inquiryOur Advantages A. International Top level TechnologyOur company owned biomedicine experts are famous at home and abroad with rich experience in research and development in the field of efficient chiral functional molecules research and development an
Cas:13991-36-1
Min.Order:0
Negotiable
Type:Trading Company
inquiryfactory?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:13991-36-1
Min.Order:1 Kilogram
FOB Price: $18.0 / 20.0
Type:Trading Company
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:13991-36-1
Min.Order:1 Kilogram
FOB Price: $2.0
Type:Lab/Research institutions
inquiryShandong 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:13991-36-1
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:13991-36-1
Min.Order:1 Metric Ton
FOB Price: $1.5
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:13991-36-1
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquirySAGECHEM is a chemical R&D, manufacturing and distribution company in China since 2009, including pharmaceutical intermediates, agrochemical, dyestuff intermediates, organosilicone, API and etc. We also offer a full range of services in custom synthe
GOLDEN PHARMA CO.,LIMITED.is a professional pharmaceutical company,our team have more than 20years expereince in pharmaceutical production and sales. we are a professional technical enterprise specializing in the R & D, production,QA regulation
We 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:13991-36-1
Min.Order:1 Metric Ton
FOB Price: $1.0
Type:Trading Company
inquiryStock products, own laboratory Package:Grams, Kilograms Application:For R&D Transportation:According to customer request Port:Shanghai
Cas:13991-36-1
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryISO/factory/goodqualityAppearance:off white Storage:Dry,cool place Package:drum Application:active pharmaceutical ingredients Transportation:by air/sea/express Port:shenzhen/shanghai
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
Cas:13991-36-1
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiry(E)-but-2-enoic acid
4-bromocrotonic acid
Conditions | Yield |
---|---|
With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In tetrachloromethane Reflux; | 98% |
With N-Bromosuccinimide; dibenzoyl peroxide In tetrachloromethane at 77℃; for 4h; | 93% |
With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In benzene at 84℃; for 2.5h; | 91.3% |
methyl-4-bromo-2-butenoate
4-bromocrotonic acid
Conditions | Yield |
---|---|
With lithium hydroxide In tetrahydrofuran; water for 3h; | 84.4% |
With lithium hydroxide monohydrate; water In tetrahydrofuran at 0℃; for 2h; | 83% |
With lithium hydroxide monohydrate; water In tetrahydrofuran at 0℃; for 2h; | 83% |
(E)-4-chlorobut-2-enoic acid
4-bromocrotonic acid
Conditions | Yield |
---|---|
With sodium bromide In acetone at 50℃; for 120h; | 81% |
but-3-enoic acid
4-bromocrotonic acid
Conditions | Yield |
---|---|
With N-Bromosuccinimide Inert atmosphere; | 70% |
2-butenoic acid
4-bromocrotonic acid
Conditions | Yield |
---|---|
With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In toluene for 2h; Heating; | 47% |
With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In tetrachloromethane at 95 - 100℃; for 6h; |
4-bromo-trans-crotonic acid ethyl ester
4-bromocrotonic acid
Conditions | Yield |
---|---|
With barium dihydroxide; ethanol at -10℃; zuletzt 1-2grad; | |
With lithium hydroxide monohydrate; water In tetrahydrofuran at 0℃; for 2h; | 200 mg |
vinyl glycolic acid
4-bromocrotonic acid
Conditions | Yield |
---|---|
With diethyl ether; phosphorus tribromide |
γ-bromocrotonate de trimethylsilyle
4-bromocrotonic acid
Conditions | Yield |
---|---|
With water for 0.0833333h; Yield given; |
methyl-4-bromo-2-butenoate
hydrogen bromide
4-bromocrotonic acid
diethyl ether
vinyl glycolic acid
phosphorus tribromide
4-bromocrotonic acid
ethanol
methyl-4-bromo-2-butenoate
4-bromocrotonic acid
N-Bromosuccinimide
4-bromocrotonic acid
Conditions | Yield |
---|---|
With hydrogenchloride; dibenzoyl peroxide In tetrachloromethane; (E)-but-2-enoic acid |
4-bromocrotonic acid
4-bromocrotonyl chloride
Conditions | Yield |
---|---|
With thionyl chloride at 80℃; for 16h; | 100% |
With oxalyl dichloride In dichloromethane; N,N-dimethyl-formamide at 20℃; for 1h; Temperature; Inert atmosphere; | 98% |
With thionyl chloride |
4-bromocrotonic acid
trans-4-aminocrotonic acid
Conditions | Yield |
---|---|
With ammonium hydroxide In tetrahydrofuran at 20℃; for 6h; Cooling with ice; Inert atmosphere; | 100% |
With ammonium hydroxide at 20℃; for 7h; Inert atmosphere; | 100% |
With ammonium hydroxide In tetrahydrofuran; water at 20℃; for 6h; Cooling with ice; Inert atmosphere; | 100% |
Conditions | Yield |
---|---|
In dichloromethane; N,N-dimethyl-formamide at 0 - 20℃; | 100% |
4-bromocrotonic acid
cyclohexanone
2-(1-hydroxycyclohexyl)but-3-enoic acid
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With indium In methanol Stage #2: cyclohexanone In methanol at 50℃; for 16h; | 99% |
4-bromocrotonic acid
Conditions | Yield |
---|---|
With benzotriazol-1-ol; diisopropyl-carbodiimide In dichloromethane; N,N-dimethyl-formamide at 25℃; for 48h; | 98% |
methanol
4-bromocrotonic acid
methyl-4-bromo-2-butenoate
Conditions | Yield |
---|---|
With thionyl chloride at 0℃; for 15h; | 93.1% |
With sulfuric acid Heating; |
Conditions | Yield |
---|---|
In methanol at 20℃; for 2.5h; Reflux; | 92% |
With methanol In methanol for 15h; | 71% |
4-bromocrotonic acid
6-amino-4-[(3-bromophenyl)-amino]pyrido[3,4-d]pyrimidine
1-t-Butoxycarbonylpiperazine
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In N,N-dimethyl-formamide at 0℃; for 1h; Stage #2: 6-amino-4-[(3-bromophenyl)-amino]pyrido[3,4-d]pyrimidine In N,N-dimethyl-formamide at 0 - 20℃; for 1h; Stage #3: 1-t-Butoxycarbonylpiperazine In N,N-dimethyl-formamide at 20℃; for 0.5h; | 91% |
4-bromocrotonic acid
Conditions | Yield |
---|---|
With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 20℃; | 90% |
4-bromocrotonic acid
diisopropyl-carbodiimide
Conditions | Yield |
---|---|
In dichloromethane for 3h; Ambient temperature; Title compound not separated from byproducts; | A 12.5% B 87.5% |
4-bromocrotonic acid
benzaldehyde
2-[hydroxy(phenyl)methyl]but-3-enoic acid
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With indium In ethanol; water Stage #2: benzaldehyde In ethanol; water at 30℃; for 16h; | 87% |
4-bromocrotonic acid
Conditions | Yield |
---|---|
With N-ethyl-N,N-diisopropylamine; HATU In N,N-dimethyl-formamide at 0 - 20℃; for 1h; | 86.5% |
4-bromocrotonic acid
N,N-dimethylammonium chloride
(E)-4-bromobut-2-enoic acid dimethylamide
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With oxalyl dichloride; N,N-dimethyl-formamide In dichloromethane at 0 - 20℃; for 4h; Inert atmosphere; Stage #2: N,N-dimethylammonium chloride With sodium carbonate In dichloromethane at 0℃; for 2h; Inert atmosphere; | 86% |
4-bromocrotonic acid
benzoin monomethyl ether
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With indium In methanol Stage #2: benzoin monomethyl ether In methanol at 50℃; for 16h; | 85% |
4-bromocrotonic acid
2-methoxyethylamine
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With oxalyl dichloride; N,N-dimethyl-formamide In dichloromethane at 0 - 25℃; for 5h; Stage #2: 2-methoxyethylamine With sodium carbonate In dichloromethane at 20℃; | 85% |
4-bromocrotonic acid
(S)-2-phenyl-2-((5,6,7,8-tetrahydropyrido[4’,3’:4,5]thieno[2,3-d]pyrimidin-4-yl)amino)ethan-1-ol
1-t-Butoxycarbonylpiperazine
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With triethylamine; isobutyl chloroformate In tetrahydrofuran at -15℃; for 0.25h; Stage #2: (S)-2-phenyl-2-((5,6,7,8-tetrahydropyrido[4’,3’:4,5]thieno[2,3-d]pyrimidin-4-yl)amino)ethan-1-ol With triethylamine In tetrahydrofuran at 0 - 20℃; for 2.16667h; Stage #3: 1-t-Butoxycarbonylpiperazine With triethylamine In tetrahydrofuran; water for 2h; | 75.1% |
Stage #1: 4-bromocrotonic acid With triethylamine; isobutyl chloroformate In tetrahydrofuran at -15℃; for 0.25h; Stage #2: (S)-2-phenyl-2-((5,6,7,8-tetrahydropyrido[4’,3’:4,5]thieno[2,3-d]pyrimidin-4-yl)amino)ethan-1-ol In tetrahydrofuran at 0 - 20℃; for 2.16667h; Stage #3: 1-t-Butoxycarbonylpiperazine In tetrahydrofuran; water for 2h; |
4-bromocrotonic acid
4-chlorobenzaldehyde
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With indium In methanol Stage #2: 4-chlorobenzaldehyde In methanol at 50℃; for 16h; | 75% |
4-bromocrotonic acid
Conditions | Yield |
---|---|
With N-ethyl-N,N-diisopropylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate In acetonitrile at 20℃; for 4h; | 74.5% |
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With oxalyl dichloride; N,N-dimethyl-formamide In dichloromethane at 0℃; for 2h; Inert atmosphere; Stage #2: pyrrolidine With sodium carbonate In dichloromethane at 0℃; Inert atmosphere; | 73% |
Stage #1: 4-bromocrotonic acid With oxalyl dichloride; N,N-dimethyl-formamide In dichloromethane at 0 - 20℃; for 1h; Stage #2: pyrrolidine With N-ethyl-N,N-diisopropylamine In tetrahydrofuran; dichloromethane at 0 - 20℃; for 1h; | 6% |
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With phosphorus pentachloride In dichloromethane for 1.5h; Reflux; Inert atmosphere; Stage #2: C23H20N6O In dichloromethane for 1.5h; Reflux; Inert atmosphere; | 72.6% |
4-bromocrotonic acid
N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine
4,4-ethylenedioxy-piperidine
(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)but-2-enamide
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With thionyl chloride In dichloromethane at 20℃; Stage #2: N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine With pyridine In tetrahydrofuran at 0 - 20℃; Stage #3: 4,4-ethylenedioxy-piperidine With sodium iodide In N,N-dimethyl-formamide at 0 - 20℃; | 72% |
4-bromocrotonic acid
(2E)-4-hydroxybut-2-enoic acid
Conditions | Yield |
---|---|
With potassium hydroxide for 0.0833333h; Heating; | 71% |
azetidine-3-ol
4-bromocrotonic acid
N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine
(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(3-hydroxyazetidin-1-yl)but-2-enamide
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With thionyl chloride In dichloromethane at 20℃; Stage #2: N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine With pyridine In tetrahydrofuran at 0 - 20℃; Stage #3: azetidine-3-ol With sodium iodide In N,N-dimethyl-formamide at 0 - 20℃; | 71% |
4-fluoropiperidine
4-bromocrotonic acid
N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine
(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(4-fluoropiperidin-1-yl)but-2-enamide
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With thionyl chloride In dichloromethane at 20℃; Stage #2: N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine With pyridine In tetrahydrofuran at 0 - 20℃; Stage #3: 4-fluoropiperidine With sodium iodide In N,N-dimethyl-formamide at 0 - 20℃; | 71% |
4-ethylpiperazine
4-bromocrotonic acid
N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine
(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(4-ethylpiperazin-1-yl)but-2-enamide
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With thionyl chloride In dichloromethane at 20℃; Stage #2: N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine With pyridine In tetrahydrofuran at 0 - 20℃; Stage #3: 4-ethylpiperazine With sodium iodide In N,N-dimethyl-formamide at 0 - 20℃; | 71% |
methanol
4-bromocrotonic acid
sodium methylate
(E)-4-methoxybut-2-enoic acid
Conditions | Yield |
---|---|
for 15h; | 71% |
4-bromocrotonic acid
Conditions | Yield |
---|---|
Stage #1: 4-bromocrotonic acid With N-ethyl-N,N-diisopropylamine; HATU In dichloromethane at 20℃; for 0.25h; Stage #2: 6-(1-(1-(azetidine-3-carbonyl)piperidin-4-yl)-1H-pyrazol-4-yl)-4-methoxypyrazolo[1,5-a]pyridine-3-carbonitrile In dichloromethane at 20℃; | 71% |
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