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:623-68-7
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:623-68-7
Min.Order:0 Metric Ton
Negotiable
Type:Manufacturers
inquiryThe 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
Our 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:623-68-7
Min.Order:5 Kiloliter
FOB Price: $1.2 / 5.0
Type:Manufacturers
inquiryOur Advantage Rich Experience Our products are sold all over Europe,North&South America, Sino-East, Asia and pacific area as well as Africa,we establish long term. Quality service Company cooperates with research institutes. We strictly con
Cas:623-68-7
Min.Order:1 Kilogram
FOB Price: $15.0 / 50.0
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:623-68-7
Min.Order:10 Gram
FOB Price: $146.0 / 176.0
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:623-68-7
Min.Order:1 Kilogram
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:623-68-7
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
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
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
Cas:623-68-7
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:623-68-7
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiryChemlyte Solutions believe that customers and suppliers deserve much more than what traditional distributors can offer. To grow in today s fast-paced and increasingly competitive market it is essential to be able to quickly adapt to market forces eff
Superior quality, moderate price & quick delivery. Appearance:white powder Storage:Stored in cool, dry and ventilation place; Away from fire and heat Package:25kg/drum, or as per your request. Application:Used as Pharmaceutical Intermediate
Our 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:623-68-7
Min.Order:1 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,
Zhenyu 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:623-68-7
Min.Order:1 Kilogram
FOB Price: $2.0
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:623-68-7
Min.Order:1 Metric Ton
FOB Price: $7.0 / 8.0
Type:Trading Company
inquiryChemical Name: Crotonic anhydride CAS No.: 623-68-7 Molecular Formula: C8H10O3 Molecular Weight: 154.16 Appearance:White Powder Storage:Store in cool and dry place, away from sun light. Package:25kg Application:Used mainly in the preparation of sy
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
R & D enterprises have their own stock in stockAppearance:To be subject to the object Package:Customized Application:pharmaceutical intermediates Transportation:Air Port:Shanghai;Guangzhou
Jinhua 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:623-68-7
Min.Order:100 Gram
Negotiable
Type:Lab/Research institutions
inquirystable supply&competitive price Storage:Available Package:25KG Or as client requirement Application:Important pharm intermediate Transportation:By air or By sea
high 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
Hunan chemfish Pharmaceutical co.,Ltd.located in Lugu High-tech industral park ,Hunan province . with its own R&D center and more than 10000㎡manufacture plant . Chemfish owns 40 reactors from 1000L to 8000L. With complete auxiliary equipment as
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
Cas:623-68-7
Min.Order:0
Negotiable
Type:Lab/Research institutions
inquiry★.Best quality according to requirement ★.Competitive price in China market ★.Mature Technical support ★.Professional logistic support
Supply top quality products with a reasonable price Application:api
Crotonic anhydride cas 623-68-7Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express
Conditions | Yield |
---|---|
With 2-chloro-1,3-dimethylimidazolinium chloride; triethylamine In dichloromethane at 20℃; for 18h; Acylation; | 96% |
With dicyclohexyl-carbodiimide |
Conditions | Yield |
---|---|
With 1,4-dioxane at 70 - 80℃; folgendes Destillieren des Reaktionsgemisches; |
Conditions | Yield |
---|---|
With acetic anhydride |
Conditions | Yield |
---|---|
With dichloromethane; mercury(II) oxide |
crotonyl chloride
triethylamine
benzene
trans-crotonic anhydride
diethyl ether
(E)-but-2-enoic acid
1-ethoxyacetylene
trans-crotonic anhydride
Conditions | Yield |
---|---|
With diethyl ether |
Conditions | Yield |
---|---|
With oxygen; cobalt(II) acetate; acetic acid at 30℃; unter leichtem Ueberdruck; | |
With oxygen; copper (I) acetate; acetic acid at 30℃; unter leichtem Ueberdruck; | |
With oxygen; manganese(II) acetate; acetic acid at 30℃; unter leichtem Ueberdruck; | |
With oxygen; acetic acid at 30℃; in Gegenwart einer Mischung von Wismut-,Kobalt- und Kupferpulver; |
trans-chrotonyl chloride
trans-crotonic anhydride
trans-crotonic anhydride
Conditions | Yield |
---|---|
With thionyl chloride; Petroleum ether |
trans-crotonic anhydride
methyl 2-O-benzyl-4,6-di-O-methyl-α-D-mannopyranoside
methyl 2-O-benzyl-3-O-crotonyl-4,6-di-O-methyl-α-D-mannopyranoside
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane for 16h; | 100% |
trans-crotonic anhydride
polymer, product of radical polymerization, loading of chiral auxiliary 2.42 mmol/g, Mn=5800, Mw=7000 (GPC, polystyrene standards); monomer(S): styrene; (4S)-4-{4-[(4-vinylbenzyl)oxy]benzyl}-1,3-oxazolidin-2-one
polymer, loading of chiral auxiliary 2.42 mmol/g, Mn=7500, Mw=10000 (GPC, polystyrene standards); monomer(s): styrene; (4S)-4-{4-[(4-vinylbenzyl)oxy]benzyl}-1,3-oxazolidin-2-one; trans-crotonic anhydride
Conditions | Yield |
---|---|
With dmap; triethylamine In tetrahydrofuran at 70℃; for 48h; | 100% |
methyl 6-deoxy-2,3-bis-O-(phenylmethyl)-α-D-glucopyranoside
trans-crotonic anhydride
methyl 2,3-di-O-benzyl-4-O-crotonyl-6-deoxy-α-D-glucopyranoside
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane for 20.5h; | 99% |
trans-crotonic anhydride
methyl 2,4,6-tri-O-benzyl-α-D-galactopyranoside
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane for 120h; | 98% |
trans-crotonic anhydride
methyl-2,3-di-O-benzyl-6-O-(4-toluenesulfonyl)-α-D-glucopyranoside
methyl 2,3-di-O-benzyl-4-O-crotonyl-6-O-p-toluenesulfonyl-α-D-glucopyranoside
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane for 23h; | 98% |
trans-crotonic anhydride
methyl 2,3-di-O-pivaloyl-6-O-p-toluenesulfonyl-α-D-glucopyranoside
methyl 4-O-crotonyl-2,3-di-O-pivaloyl-6-O-p-toluenesulfonyl-α-D-glucopyranoside
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane for 23h; | 98% |
trans-crotonic anhydride
(S)-4-Benzyl-2-oxazolidinone
(4S)-3-((E)-2-butenoyl)-4-benzyl-2-oxazolidinone
Conditions | Yield |
---|---|
With triethylamine; lithium chloride In tetrahydrofuran at -15 - 20℃; for 12h; | 97% |
With triethylamine; lithium chloride In tetrahydrofuran for 4h; Ambient temperature; | 88% |
methyl O-2,3,6-tri-O-benzyl-α-D-glucopyranoside
trans-crotonic anhydride
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane for 21h; | 97% |
Conditions | Yield |
---|---|
With ytterbium(III) chloride In tetrahydrofuran | 97% |
trans-crotonic anhydride
5-(2-((4S,6R)-6-((2S,3S)-3-(benzyloxy)-2-hydroxybutyl)-2,2-diisopropyl-1,3,2-dioxasilinan-4-yl)propan-2-yl)furan-2-carbaldehyde
(E)-((2S,3S)-3-(benzyloxy)-1-((4R,6S)-6-(2-(5-formylfuran-2-yl)propan-2-yl)-2,2-diisopropyl-1,3,2-dioxasilinan-4-yl)butan-2-yl) but-2-enoate
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane at 0℃; for 4h; Inert atmosphere; | 97% |
2-[2-((tert-butyldimethylsilanyloxy)methyl)phenyl]propan-1-ol
trans-crotonic anhydride
but-2-enoic acid 2-[2-((tert-butyldimethylsilanyloxy)methyl)phenyl]propyl ester
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane at 0℃; for 4h; | 96% |
Conditions | Yield |
---|---|
Acidic catalyst In cyclohexane Heating; | 95% |
trans-crotonic anhydride
1,3-dimethyl-5-adamantanol
3,5-Dimethyl-1-adamantyl crotonate
Conditions | Yield |
---|---|
Acidic catalyst In cyclohexane Heating; | 95% |
trans-crotonic anhydride
(1R,2R,3S,4R)-3-O-tert-Butyldimethylsilyl-1,2-O-cyclohexylidene-5-hydroxymethyl-5-cyclohexen-1,2,3,4-tetraol
(1R,2R,3S,4R)-3-O-tert-Butyldimethylsilyl-5-crotonyloxymethyl-1,2-O-cyclohexylidene-5-cyclohexen-1,2,3,4-tetraol
Conditions | Yield |
---|---|
With pyridine; dmap In dichloromethane | 95% |
With pyridine; dmap In dichloromethane for 12h; Ambient temperature; | 95% |
trans-crotonic anhydride
methyl 6-deoxy-2,3-di-O-methyl-α-D-glucopyranoside
methyl 4-O-crotonyl-6-deoxy-2,3-di-O-methyl-α-D-glucopyranoside
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane for 13h; | 95% |
trans-crotonic anhydride
(S)-4-benzyl-5,5-dimethyloxazolidin-2-one
(S)-3-((E)-but-2-enoyl)-4-benzyl-5,5-dimethyloxazolidin-2-one
Conditions | Yield |
---|---|
With triethylamine; lithium chloride In tetrahydrofuran at -78 - 20℃; for 12h; | 94% |
trans-crotonic anhydride
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 20 - 30℃; for 1h; | 94% |
trans-crotonic anhydride
methyl 6-deoxy-2,3-di-O-pivaloyl-α-D-glucopyranoside
methyl 4-O-crotonyl-6-deoxy-2,3-di-O-pivaloyl-α-D-glucopyranoside
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane for 19h; | 93% |
methyl 2,3,4-tri-O-benzyl-D-glucopyranoside
trans-crotonic anhydride
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane for 18h; | 92% |
trans-crotonic anhydride
methyl 2,3-di-O-benzyl-6-O-pivaloyl-α-D-glucopyranoside
methyl 2,3-di-O-benzyl-4-O-crotonyl-6-O-pivaloyl-α-D-glucopyranoside
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane for 7h; | 92% |
dimethylenecyclourethane
trans-crotonic anhydride
3-((E)-but-2-enoyl)oxazolidin-2-one
Conditions | Yield |
---|---|
With triethylamine; lithium chloride In tetrahydrofuran | 92% |
10-Deacetylbaccatine III
trans-crotonic anhydride
Conditions | Yield |
---|---|
With cerium(III) chloride In tetrahydrofuran at 25℃; for 20h; Under N2; | 91% |
cerium(III) chloride In tetrahydrofuran at 25℃; for 20h; | 91% |
trans-crotonic anhydride
Conditions | Yield |
---|---|
Stage #1: (E)-N-(4-(3-hydroxyhexa-1,5-dien-1-yl)phenyl)nicotinamide With dmap; triethylamine In dichloromethane at 0℃; Stage #2: trans-crotonic anhydride In dichloromethane at 0 - 20℃; for 3h; | 90% |
Conditions | Yield |
---|---|
Stage #1: trimethylsilyl cyanide; benzaldehyde; iron(III) chloride In nitromethane at 0℃; for 0.5h; Stage #2: trans-crotonic anhydride In nitromethane at 20℃; for 3h; | 89% |
trans-crotonic anhydride
carbon monoxide
2-bromoaniline
(E)-2-(prop-1-en-1-yl)-4H-benzo[d][1,3]oxazin-4-one
Conditions | Yield |
---|---|
With potassium tetrachloropalladate(II); N-ethyl-N,N-diisopropylamine; catacxium A In toluene at 100℃; under 1500.15 Torr; for 16h; Autoclave; | 88% |
trans-crotonic anhydride
Conditions | Yield |
---|---|
With dmap In pyridine at 20℃; for 5h; | 88% |
trans-crotonic anhydride
(2R)-bornane-10,2-sultam
(1S)-N-crotyl-2,10-camphorsultam
Conditions | Yield |
---|---|
With triethylamine; lithium chloride In tetrahydrofuran for 4h; Ambient temperature; | 87% |
(4S,5R)-4-benzyl-5-(1'H,1'H,2'H,2'H-perfluorooctyl)-oxazolidin-2-one
trans-crotonic anhydride
(E)-(4S,5R)-4-benzyl-3-(2'-butenoyl)-5-(1'H,1'H,2'H,2'H-perfluorooctyl)-2-oxazolidinone
Conditions | Yield |
---|---|
With N-ethyl-N,N-diisopropylamine; lithium chloride In tetrahydrofuran for 24h; Heating; | 87% |
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View