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:674-82-8
Min.Order:1 Kilogram
FOB Price: $3.0
Type:Lab/Research institutions
inquiry1 high purity 2 able to provide COA/HNMR/HPLC 3 High quality 4 low price 5 Best service Appearance:transparent liquid Storage:rm Package:bag/bottle/drum Application:pharmaceutical intermediate Transportation:common transportation Port:Shangha
Unique advantages for Diketene Cas 674-82-8 Guaranteed the purity High quality & competitive price Quality control Fast feedback Prompt shipment Appearance:Liquid Storage:2-8°C Package:200kg/drum Application:Intermediates Transportation:B
Cas:674-82-8
Min.Order:200 Kilogram
FOB Price: $1.0 / 15.0
Type:Trading Company
inquiryProduct name:diketene Cas :674-82-8 MF:C4H4O2 1、High quality with reasonible price 2、Fast delivey and high-efficiency 3、Professional working team and professional services 4、ISO,GMP certified Introduction: Hefei TNJ Chemical Indu
Cas:674-82-8
Min.Order:0 Metric Ton
Negotiable
Type:Trading Company
inquiryhigh quality Appearance:White or off-white Solid Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea Port:shanghai
The 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
Acetyl ketene Basic information Product Name: Acetyl ketene Synonyms: 3-buteno-beta-lactone;3-Butenoic acid, 3-hydroxy-, beta-lactone;3-hydroxy-3-butenoicacibeta-lactone;4-methylene-2-ox
Cas:674-82-8
Min.Order:1 Kilogram
Negotiable
Type:Lab/Research institutions
inquiryFounded in 2008, East Chemsources Limited is a professional manufacturer and supplier in food and chemical field in China. Through more than ten years development, our company has developed from single product at first to provide solution to final
Henan 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
Diketene CAS:674-82-8 Specification product name diketene apperance colorless or light yellow liquid einecs 211-617-1 mf c4h4o2 mw 84.07 assay ≥90.0% Welcome to con
Cas:674-82-8
Min.Order:1 Kilogram
FOB Price: $100.0 / 150.0
Type:Other
inquiryAppearance:white powder/crystal Storage:Store in a cool,dry place and keep away from direct strong light Package:As customer request Application:Used for research and industrial manufacture. Transportation:Common products:Sea/A
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
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
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
Zibo 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:674-82-8
Min.Order:10 Gram
FOB Price: $100.0
Type:Lab/Research institutions
inquiryAcetyl KeteneAppearance:Pls see the Details Storage:Keep away of light, hot, water, Store in dry, dark and ventilated place Package:according to customers' requirements Application:Steroids, Cosmetics Ingredients, APIs, Intermediates, OLED&Battery In
supplier in China Appearance:colorless liquid Storage:Stored in cool, dry and ventilation place; Away from fire and heat Package:100g/bottle,1kg/bottle,25kg/drum or as per your request Application:As a reagent in organic synthesis, used for the
Product 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,
Appearance:95%+ Package:R&D,Pilot run Transportation:per client require Port:Express ,Air, Sea
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
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
high purity, manufacturer Application:Intermediate
Q1: Are you a manufacturer Answer: Yes, we are factory founded on 2012.Q2: How to contact with us Click "contact supplier" And then send us message the product you interest in, you will get reply within 12 hours.Q3:Which kind of payment terms do you
Our clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS
It is a raw material for fine chemical dyes, pharmaceuticals, pesticides, food and feed additives, Auxiliaries, etc.. Application:It is a raw material for fine chemical dyes, pharmaceuticals, pesticides, food and feed additives, Auxiliaries, etc..
Product Description Description & Specification Category Pharmaceutical Raw Materials, Fine Chemicals, Bulk drug Standard Medical standard
Cas:674-82-8
Min.Order:1 Kilogram
FOB Price: $112.0
Type:Trading Company
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
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:any port in China
buy Diketene CAS: 674-82-8 from Diketene manufacturer Application:buy Diketene CAS: 674-82-8 from Diketene manufacturer
Cas:674-82-8
Min.Order:0
Negotiable
Type:Other
inquiryA
4-methyleneoxetan-2-one
B
bis(triphenylphosphine)nickel(0) dicarbonyl
C
isobutene
Conditions | Yield |
---|---|
With carbon monoxide In toluene High Pressure; 5 atm CO, 50°C, 1 h; pptn. of complex; | A 8% B 83% C n/a |
Conditions | Yield |
---|---|
With N,N,N,N,-tetramethylethylenediamine In hexane at -15 - -10℃; for 3.5h; | 75% |
Conditions | Yield |
---|---|
at 325℃; |
Conditions | Yield |
---|---|
at 110℃; under 15 Torr; |
Ketene
buta-1,3-diene
A
4-methyleneoxetan-2-one
B
3-vinylcyclobutanone
Conditions | Yield |
---|---|
With nitrogen at 100℃; |
Conditions | Yield |
---|---|
With diethyl ether |
Conditions | Yield |
---|---|
With diethyl ether |
Conditions | Yield |
---|---|
Pd(PCy3)2(dba) In benzene-d6 at 25℃; under 22501.8 Torr; |
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
N-(4-bromophenyl)-3-oxobutyramide
A
4-methyleneoxetan-2-one
B
4-bromo-aniline
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
4'-methoxyacetoacetanilide
A
4-methyleneoxetan-2-one
B
4-methoxy-aniline
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
3-oxo-N-m-tolylbutanamide
A
4-methyleneoxetan-2-one
B
1-amino-3-methylbenzene
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
N-(3'-methoxyphenyl)-3-oxobutanamide
A
4-methyleneoxetan-2-one
B
m-Anisidine
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
N-(3-bromo-phenyl)-3-oxo-butyramide
A
4-methyleneoxetan-2-one
B
3-bromoaniline
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
Conditions | Yield |
---|---|
In cyclohexane at 25℃; Equilibrium constant; |
1,2-propanediene
p-benzoquinone
A
4-methyleneoxetan-2-one
B
Spiro<3.5>nona-5,8-dien-2,7-dion
C
3-Methylene-1-oxa-spiro[3.5]nona-5,8-dien-7-one
D
C15H12O4
Conditions | Yield |
---|---|
In trichlorofluoromethane at -25℃; under 760 Torr; for 1h; Irradiation; Laser VIS-irradiation, 455-515 nm; | A n/a B n/a C 146 mg D 6.2 mg |
Ketene
acetaldehyde
A
4-methyleneoxetan-2-one
B
4-methyloxetan-2-one
C
3-penten-2-one
Ketene
acetaldehyde
A
4-methyleneoxetan-2-one
B
4-methyloxetan-2-one
C
3-penten-2-one
Ketene
sulfuric acid
acetone
A
4-methyleneoxetan-2-one
B
Isopropenyl acetate
C
acetic anhydride
Conditions | Yield |
---|---|
at 55℃; |
Ketene
acetone
A
4-methyleneoxetan-2-one
B
Isopropenyl acetate
C
acetic anhydride
Conditions | Yield |
---|---|
at 100℃; |
n-dodecanoyl chloride
triethylamine
acetyl chloride
A
4-methyleneoxetan-2-one
Conditions | Yield |
---|---|
In dichloromethane at 0 - 20℃; | 100% |
In dichloromethane at 0 - 20℃; | 100% |
In dichloromethane at 0 - 20℃; | 100% |
4-methyleneoxetan-2-one
2-(N,N-dimethylamino)ethanol
acetoacetic acid 2-dimethylamino-ethyl ester
Conditions | Yield |
---|---|
With dmap In tetrahydrofuran at 65℃; for 0.5h; | 100% |
at 70 - 71℃; for 5h; | 99% |
With triethylamine at 95℃; for 3h; | 84% |
4-methyleneoxetan-2-one
cinnamylamine
3-oxo-N-(3-phenyl-2-propen-1-yl) butylamide
Conditions | Yield |
---|---|
With triethylamine In toluene at 70℃; for 3h; | 100% |
In diethyl ether |
Conditions | Yield |
---|---|
In tetrahydrofuran at 0℃; Inert atmosphere; | 100% |
In tetrahydrofuran at 0℃; for 0.0833333h; Inert atmosphere; | 100% |
With triethylamine In methanol; toluene at 0℃; for 2h; | 95% |
Conditions | Yield |
---|---|
With sodium acetate In tetrahydrofuran for 2h; Reflux; | 100% |
With triethylamine In chloroform for 10h; Ambient temperature; | 96.7% |
With triethylamine | |
With dmap |
Conditions | Yield |
---|---|
In tetrahydrofuran at 20℃; | 100% |
for 2h; Yield given; | |
In toluene at 100℃; for 1h; | |
In tert-butyl methyl ether at -5 - 0℃; for 1h; | 49.55 g |
4-methyleneoxetan-2-one
cycl-isopropylidene malonate
2,2-dimethyl-5-(1-hydroxy-3-oxobutylidene)-1,3-dioxane-4,6-dione
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 0 - 20℃; for 2h; | 100% |
Stage #1: 4-methyleneoxetan-2-one; cycl-isopropylidene malonate With triethylamine In dichloromethane at 0 - 20℃; for 2h; Stage #2: With hydrogenchloride In dichloromethane; water | 100% |
With triethylamine In dichloromethane at 20℃; | 100% |
4-methyleneoxetan-2-one
methylthiol
4-Methylsulfanylmethyl-oxetan-2-one
Conditions | Yield |
---|---|
With 2,2'-azobis(isobutyronitrile) In diethyl ether for 2h; Ambient temperature; Irradiation; | 100% |
Conditions | Yield |
---|---|
In diethyl ether at 0℃; for 0.5h; | 100% |
With sulfuric acid In diethyl ether for 2h; Ambient temperature; | 72% |
In diethyl ether at 0 - 5℃; |
4-methyleneoxetan-2-one
Octanethiol
4-Octylsulfanylmethyl-oxetan-2-one
Conditions | Yield |
---|---|
With 2,2'-azobis(isobutyronitrile) In Petroleum ether at 25℃; for 1h; | 100% |
4-methyleneoxetan-2-one
Cyclopropylmethanol
cyclopropylmethyl 3-oxobutanoate
Conditions | Yield |
---|---|
With triethylamine In chloroform for 10h; Ambient temperature; | 100% |
With sodium hydride at 70 - 80℃; for 2h; | 93% |
With sodium acetate for 16h; Ambient temperature; |
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 20℃; for 3h; | 100% |
With sodium acetate In acetonitrile for 2h; Heating; | 96% |
With triethylamine In acetone for 2h; Heating; | 92% |
4-methyleneoxetan-2-one
benzyl 2-(2-ethoxy-2-ethoxyethyl)-1-hydrazinecarboxylate
benzyl 2-acetoacetyl-2-(ethoxycarbonylmethyl)hydrazine-1-carboxylate
Conditions | Yield |
---|---|
With triethylamine In benzene for 16h; Heating; | 100% |
In benzene Yield given; |
4-methyleneoxetan-2-one
isopropoxyamine hydrochloride
N-Isopropoxy-3-oxo-butyramide
Conditions | Yield |
---|---|
With triethylamine In methanol; toluene at 0 - 5℃; for 0.5h; | 100% |
4-methyleneoxetan-2-one
(-)-8-phenylmenthol
(+)-(1R,2S,5R)-8-phenylmenthyl 3-oxobutanoate
Conditions | Yield |
---|---|
With triethylamine In dichloromethane at 20℃; for 3h; | 100% |
With triethylamine In acetone for 3h; Heating; | 95% |
With sodium acetate In chloroform for 1h; Heating; | 85.9% |
With sodium acetate In tetrahydrofuran for 2h; Heating; |
4-methyleneoxetan-2-one
2-<4-(4-benzhydryl-1-piperazinyl)phenyl>ethyl alcohol
2-<4-(4-benzhydryl-1-piperazinyl)phenyl>ethyl acetoacetate
Conditions | Yield |
---|---|
With dmap In tetrahydrofuran 1) ice-salt cooling, 30 min, 2) r.t.; | 100% |
Conditions | Yield |
---|---|
In diethyl ether Reflux; | 100% |
In diethyl ether for 3h; Heating / reflux; | 93% |
In methanol at 0℃; Inert atmosphere; | 46% |
In methanol for 3h; Ambient temperature; | |
In methanol at 0℃; Inert atmosphere; |
4-methyleneoxetan-2-one
methyl 3-<(benzyloxy)amino>-2-propionate
3-[Benzyloxy-(3-oxo-butyryl)-amino]-2-(4-benzyloxy-phenyl)-propionic acid methyl ester
Conditions | Yield |
---|---|
With dmap; triethylamine In tetrahydrofuran 1.) -78 deg C, 30 min, 2.) 0 deg C, 30 min; | 100% |
4-methyleneoxetan-2-one
(S)-methyl 5,5-dimethyl-1,3-thiazolidine-4-carboxylate
methyl (4S)-5,5-dimethyl-3-(3-oxobutanoyl)thiazolidine-4-carboxylate
Conditions | Yield |
---|---|
With triethylamine In dichloromethane for 15h; Heating; | 100% |
4-methyleneoxetan-2-one
1-benzyl-3-pyrrolidinol
1-benzyl-3-acetoacetyloxypyrrolidine
Conditions | Yield |
---|---|
at 70 - 80℃; for 1h; | 100% |
4-methyleneoxetan-2-one
1-benzyl-3-hydroxypiperidine
1-benzylpiperidin-3-yl acetoacetate
Conditions | Yield |
---|---|
With triethylamine In chloroform for 10h; Ambient temperature; | 100% |
4-methyleneoxetan-2-one
Conditions | Yield |
---|---|
With triethylamine In tetrahydrofuran for 9h; Ambient temperature; | 100% |
4-methyleneoxetan-2-one
3,5-dimethyl-hexa-1,4-dien-3-ol
3-oxo-butyric acid 1,3-dimethyl-1-vinyl-but-2-enyl ester
Conditions | Yield |
---|---|
With dmap In diethyl ether at 23℃; | 100% |
Conditions | Yield |
---|---|
With triethylamine In dichloromethane for 2h; Heating; | 100% |
4-methyleneoxetan-2-one
N,N-diethylethylenediamine
N-(2-(diethylamino)ethyl)-3-oxobutanamide
Conditions | Yield |
---|---|
In various solvent(s) | 100% |
In dichloromethane at 0 - 20℃; for 0.5h; | 100% |
In tert-butyl methyl ether at 0 - 20℃; | 93% |
4-methyleneoxetan-2-one
(E)-cinnamylamine
Conditions | Yield |
---|---|
With triethylamine In toluene at 70℃; for 3h; | 100% |
With triethylamine In toluene |
4-methyleneoxetan-2-one
(E)-3-(thien-2-yl)prop-2-en-1-ol
Conditions | Yield |
---|---|
With triethylamine In toluene at 70℃; for 1.5h; | 100% |
With dmap In tetrahydrofuran at 0℃; for 2h; Inert atmosphere; | 80% |
4-methyleneoxetan-2-one
Conditions | Yield |
---|---|
With triethylamine In toluene at 70℃; for 2h; | 100% |
Conditions | Yield |
---|---|
In tetrahydrofuran at 20℃; for 2.5h; Inert atmosphere; | 100% |
4-methyleneoxetan-2-one
(R)-1-phenylethanol
(R)-1-phenylethyl acetoacetate
Conditions | Yield |
---|---|
With dmap In tetrahydrofuran at 20℃; | 100% |
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