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:821-11-4
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Type:Lab/Research institutions
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:821-11-4
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inquiry821-11-4 2-BUTENE-1,4-DIOL Now we would like to update our product list for you, kindly check the below information: 1. Catalyst series ( such as Noble Metal Catalyst, Phosphorous ligand, etc ) 2. Pharmaceutical Intermediate ( suc
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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.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:821-11-4
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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
Massive Chemical is certified with ISO9001 and ISO14001 manufacturer for this product. We will offer all documents as requirement for the materials which includes, Certificate of Analysis, Material Safety Data Sheet, and Method of Analysis and
Cas:821-11-4
Min.Order:1 Gram
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Type:Lab/Research institutions
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
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
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
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:821-11-4
Min.Order:1 bottle
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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
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
Best quality with low price Storage:ln stock Package:25kg/Barrel Application:Chemicals Transportation:Express/Sea/Air Port:Shanghai
2-Butene-1,4-diol,(2E)- cas 821-11-4Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express
factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
Good Quality Application:Medical or chemical
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:821-11-4
Min.Order:10 Milligram
Negotiable
Type:Lab/Research institutions
inquiryShanghai, Run-Biotech Co., Ltd is a leading domestic pharmaceutical, biopharmaceutical, and health care products R & D outsourcing services company. As an innovation-driven and customer-focused company, Run Biotech provides a broad and integrat
Wuhan Sun-shine Bio-technology Corporation Limited is specializing in the anticancer, antitumor,heart head blood-vessel,pharmaceutical intermediates,fine Chemicals production and customization..Company has strong ability of research and development,
U-CHEMO is a high-tech enterprise taking pharmaceutical intermediates and fine chemicals as main products. We pay high attention on product quality and apply quality management in the whole manufacturing process from research to production. In additi
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
CAS Number: 821-11-4 Linear Formula: C4H8O2 Molecular Weight: 88.11 Appearance slightly pale yellow clear oil Assay(GC) Min. 97% m.p 25°C IR,…Appearance:slightly pale yellow clear oila Package:1g/5g/25g
High Quality Best Price Storage:Store in dry, dark and ventilated place Application:Chemical Synthesis Intermediate
Conditions | Yield |
---|---|
With lithium aluminium tetrahydride In tetrahydrofuran at 0 - 20℃; for 48h; Inert atmosphere; | 100% |
With lithium aluminium tetrahydride In tetrahydrofuran for 3h; Reduction; Heating; | 99% |
With lithium aluminium tetrahydride In tetrahydrofuran for 18h; Heating; | 90% |
Conditions | Yield |
---|---|
With C37H40Cl2N2ORuS2 In tetrahydrofuran-d8 at 45℃; for 1h; Inert atmosphere; | A 100% B 100% |
allyl alcohol
(R)-3-allylsulfanyl-2-tert-butoxycarbonylaminopropionic acid methyl ester
A
(E)-2-butene-1,4-diol
B
C13H23NO5S
Conditions | Yield |
---|---|
With Hoveyda-Grubbs catalyst second generation In water; tert-butyl alcohol at 32℃; for 2.5h; optical yield given as %de; | A 99% B 56% |
Conditions | Yield |
---|---|
With hydrogenchloride; diethyl ether; water In ethanol for 16h; Inert atmosphere; Reflux; | 98% |
With hydrogenchloride In ethanol; water at 80℃; for 12h; | 72% |
(E)-2-butene-1,4-diol
Conditions | Yield |
---|---|
With silica gel; triethylamine In diethyl ether; Petroleum ether Substitution; Detrifluoroacetylation; | 95% |
(E)-2-butene-1,4-diol
Conditions | Yield |
---|---|
With tetra-N-butylammonium tribromide In methanol at 20℃; for 0.16h; | 95% |
Conditions | Yield |
---|---|
With diisobutylaluminium hydride In toluene at 20℃; for 12h; | 79% |
With diisobutylaluminium hydride In toluene at 20℃; Inert atmosphere; | 60% |
With diethylaluminium hydride; benzene | |
With diisobutylaluminium hydride; benzene | |
With diisobutylaluminium hydride In hexane; benzene at 5 - 20℃; for 3h; |
Conditions | Yield |
---|---|
With lithium aluminium tetrahydride In tetrahydrofuran at 0 - 20℃; for 12.3333h; Inert atmosphere; | 67% |
With lithium aluminium tetrahydride In tetrahydrofuran at 0 - 20℃; for 12h; | 67% |
Conditions | Yield |
---|---|
With Hoveyda-Grubbs catalyst second generation; 5,17-bis[(3-(2,6-diisopropylphenyl)imidazolium)methyl]-25,26,27,28-tetrapropoxycalix[4]arene dichloride In water at 45℃; for 24h; optical yield given as %de; | 54% |
methylene-pyridinium-tagged Hoveyda-Grubbs pre-catalyst at 25℃; for 3.5h; | 99 % Chromat. |
Conditions | Yield |
---|---|
With water |
Conditions | Yield |
---|---|
With sodium carbonate | |
With sodium carbonate at 90 - 95℃; |
Conditions | Yield |
---|---|
With sodium carbonate at 90 - 95℃; |
Conditions | Yield |
---|---|
With water; lead(II) oxide | |
With lead(II) oxide In water Heating; |
Conditions | Yield |
---|---|
With lithium aluminium tetrahydride; diethyl ether |
Conditions | Yield |
---|---|
With lithium aluminium tetrahydride; diethyl ether |
Conditions | Yield |
---|---|
With sodium perchlorate In water; acetonitrile (electrolysis); |
Conditions | Yield |
---|---|
With hydrogen; ruthenium palladium In propan-1-ol at 89.9℃; Rate constant; | |
With hydrogen; copper(II) sulfate; nickel In ammonium hydroxide; water at 40℃; under 5250.4 Torr; Title compound not separated from byproducts; | |
With hydrogen In isopropyl alcohol at 30℃; under 7500.75 Torr; for 1h; Autoclave; optical yield given as %de; stereoselective reaction; |
1,4-butenediol
(E)-2-butene-1,4-diol
A
(E)-2-butene-1,4-diol
B
(R)-(+)-3,4-dihydroxy-1-butene
Conditions | Yield |
---|---|
With sodium methylate In methanol Ambient temperature; Yield given; |
Conditions | Yield |
---|---|
With diisobutylaluminium hydride In toluene 1.) -78 deg C, 90 min, 2.) 0 deg C, 30 min; | |
With diisobutylaluminium hydride In toluene at -10 - 20℃; for 18h; | |
With diisobutylaluminium hydride In toluene at -10 - 20℃; for 18h; |
Conditions | Yield |
---|---|
With samarium In methanol for 1h; Ambient temperature; Yield given. Yields of byproduct given. Title compound not separated from byproducts; |
epoxybutene
A
2,5-dihydrofuran
B
trans-Crotonaldehyde
C
3,4-butenediol
D
(E)-2-butene-1,4-diol
Conditions | Yield |
---|---|
With potassium iodide; USY zeolite In various solvent(s) at 74.85℃; for 24h; Product distribution; Mechanism; var. nucleophiles and acids; var. solv. and time; |
Conditions | Yield |
---|---|
Hydrogenation; |
1,4-dihydroxybut-2-yne
ethanol
A
2,5-dihydrofuran
B
Butane-1,4-diol
C
1,4-butenediol
D
(E)-2-butene-1,4-diol
Conditions | Yield |
---|---|
Produkt5: But-2ξ-en-1-ol.Hydrogenation; |
(E)-2-butene-1,4-diol
Conditions | Yield |
---|---|
With barium dihydroxide |
1-chloro-2-hydroxy-3-butene
A
epoxybutene
B
3,4-butenediol
C
(E)-2-butene-1,4-diol
(E)-2-butene-1,4-diol
p-toluenesulfonyl chloride
(E)-1,4-ditosyloxybut-2-ene
Conditions | Yield |
---|---|
With sodium t-butanolate In tetrahydrofuran at 0 - 20℃; | 100% |
With sodium t-butanolate In tetrahydrofuran at 0 - 20℃; Inert atmosphere; | 82% |
With potassium hydroxide; N-benzyl-N,N,N-triethylammonium chloride In 1,4-dioxane at -3 - 20℃; for 3.5h; | |
With sodium t-butanolate |
(E)-2-butene-1,4-diol
acetic anhydride
trans-1-hydroxy-4-acetoxy-2-butene
Conditions | Yield |
---|---|
With pyridine at 20℃; for 24h; | 95% |
With sodium hydride In tetrahydrofuran Ambient temperature; | 70% |
Stage #1: trans-butene-1,4-diol With pyridine In toluene for 0.166667h; Stage #2: acetic anhydride In toluene at 0 - 20℃; for 24h; | 45% |
In pyridine |
Conditions | Yield |
---|---|
With tetra-N-butylammonium tribromide In dichloromethane at 20℃; for 0.5h; | 95% |
Conditions | Yield |
---|---|
Stage #1: trans-butene-1,4-diol With sodium hydride In tetrahydrofuran at 0℃; for 3.5h; Inert atmosphere; Reflux; Stage #2: benzyl bromide In tetrahydrofuran for 3.5h; Inert atmosphere; Reflux; | 93% |
Stage #1: trans-butene-1,4-diol With sodium hydride In tetrahydrofuran; mineral oil at 0℃; Inert atmosphere; Reflux; Stage #2: benzyl bromide In tetrahydrofuran for 3.5h; Inert atmosphere; Reflux; | 91% |
(E)-2-butene-1,4-diol
4-biphenyl-carboxylic acid chloride
Conditions | Yield |
---|---|
With pyridine at 20℃; for 72h; | 92% |
Conditions | Yield |
---|---|
With cyclopentadienylruthenium(II) trisacetonitrile hexafluorophosphate In N,N-dimethyl acetamide at 100℃; Schlenk technique; Inert atmosphere; enantioselective reaction; | 92% |
Conditions | Yield |
---|---|
With 1,8-diazabicyclo[5.4.0]undec-7-ene In tetrahydrofuran at -5℃; for 1h; Molecular sieve; | 91% |
(E)-2-butene-1,4-diol
ethyl (triphenylphosphoranylidene)acetate
diethyl octa-2(E),4(E),6(E)-triene-1,8-dioate
Conditions | Yield |
---|---|
With 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione In dimethyl sulfoxide at 20℃; for 10h; | 90% |
With Dess-Martin periodane; benzoic acid In dichloromethane; dimethyl sulfoxide at 20℃; for 0.5h; | 64% |
Conditions | Yield |
---|---|
With dihydrogen peroxide; iodine at 20℃; for 12h; | 90% |
(E)-2-butene-1,4-diol
tert-butyldimethylsilyl chloride
(E)-4-[(tert-butyldimethylsilyl)oxy]-2-buten-1-ol
Conditions | Yield |
---|---|
Stage #1: trans-butene-1,4-diol With sodium hydride In tetrahydrofuran at 20℃; for 0.75h; Stage #2: tert-butyldimethylsilyl chloride In tetrahydrofuran at 20℃; for 0.75h; Further stages.; | 89% |
In N,N-dimethyl-formamide at 0 - 20℃; Inert atmosphere; | 89% |
With 1H-imidazole In N,N-dimethyl-formamide at 0 - 20℃; | 89% |
1H-imidazole
(E)-2-butene-1,4-diol
tert-butyldimethylsilyl chloride
(E)-4-[(tert-butyldimethylsilyl)oxy]-2-buten-1-ol
Conditions | Yield |
---|---|
In N,N-dimethyl-formamide | 89% |
(E)-2-butene-1,4-diol
propargyl bromide
(E)-1,4-bis(prop-2-yn-1-yloxy)but-2-ene
Conditions | Yield |
---|---|
Stage #1: trans-butene-1,4-diol With sodium hydride In N,N-dimethyl-formamide; mineral oil at 0 - 20℃; for 0.5h; Inert atmosphere; Stage #2: propargyl bromide In N,N-dimethyl-formamide; toluene; mineral oil for 2h; Inert atmosphere; | 89% |
(E)-2-butene-1,4-diol
benzyl bromide
(E)-4-(benzyloxy)-2-buten-1-ol
Conditions | Yield |
---|---|
Stage #1: trans-butene-1,4-diol With sodium hydride In tetrahydrofuran at 20℃; for 1.5h; Stage #2: benzyl bromide In tetrahydrofuran for 1h; Reflux; | 88.8% |
Stage #1: trans-butene-1,4-diol With sodium hydride In tetrahydrofuran; mineral oil at 0℃; for 1h; Inert atmosphere; Stage #2: benzyl bromide In tetrahydrofuran; mineral oil at 0 - 75℃; for 1h; Inert atmosphere; | 87% |
With sodium hydride In N,N-dimethyl-formamide | 85% |
(E)-2-butene-1,4-diol
tert-butylchlorodiphenylsilane
(E)-4-(tert-butyldiphenylsilyloxy)-2-buten-1-ol
Conditions | Yield |
---|---|
With n-butyllithium In tetrahydrofuran; hexane at -78 - 20℃; | 88% |
With 1H-imidazole In N,N-dimethyl-formamide at 20℃; for 20h; | 56% |
With 1H-imidazole at 0℃; for 15h; | 48% |
Conditions | Yield |
---|---|
With 1,1'-azodicarbonyl-dipiperidine; trimethylphosphane In tetrahydrofuran at 22℃; for 4h; | 88% |
Conditions | Yield |
---|---|
With potassium tert-butylate In neat (no solvent) at 20℃; for 0.333333h; Michael Addition; Inert atmosphere; | 88% |
(E)-2-butene-1,4-diol
Conditions | Yield |
---|---|
With dihydrogen peroxide; iodine In acetonitrile at 20℃; for 13h; | 87% |
Conditions | Yield |
---|---|
With boron trifluoride diethyl etherate In dichloromethane at 20℃; for 0.5h; | 87% |
(E)-2-butene-1,4-diol
3-chloro-3-oxopropanoic acid methyl ester
2,2'-(2E)-but-2-ene-1,4-diyl 3,3'-dimethyl dimalonate
Conditions | Yield |
---|---|
With dmap; triethylamine In dichloromethane at 0 - 20℃; for 1h; | 87% |
(E)-2-butene-1,4-diol
(R,R)-2,2-dideuterio-1,3-cyclopropanedimethanol
Conditions | Yield |
---|---|
With (4S,5S)-2-butyl-N4,N4,N5,N5-tetramethyl-1,3,2-dioxaborolane-4,5-dicarboxamide In dichloromethane at -45 - 20℃; Charette cyclopropanation; | 86% |
Conditions | Yield |
---|---|
With sodium hydride In tetrahydrofuran at 0 - 25℃; for 25h; | 86% |
Stage #1: trans-butene-1,4-diol With sodium hydride In tetrahydrofuran; mineral oil at 0 - 5℃; for 1.33333h; Inert atmosphere; Stage #2: methyl iodide In tetrahydrofuran; mineral oil at 16 - 19℃; for 16.5h; |
(E)-2-butene-1,4-diol
2-bromoisobutyric acid bromide
Conditions | Yield |
---|---|
With triethylamine In tetrahydrofuran | A n/a B 85% |
Conditions | Yield |
---|---|
With sodium hydride In N,N-dimethyl-formamide at 0 - 80℃; for 72h; | 85% |
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