CAS No.3008-40-0,cyclooctane-1,2-dione Suppliers

Shanghai Upbio Tech Co.,Ltd

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1,2-Cyclopentanedione

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Henan Wentao Chemical Product Co., Ltd.

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

1,2-Cyclopentanedione

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Zibo Hangyu Biotechnology Development Co., Ltd

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

cyclooctane-1,2-dione

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TAIZHOU ZHENYU BIOTECHNOLOGY CO., LTD

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

cyclooctane-1,2-dione

Cas:3008-40-0

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Shandong Mopai Biotechnology Co., LTD

Shandong 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

1,2-Cyclopentanedione

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Antimex Chemical Limied

factory?direct?sale Application:Fine chemical intermediates, used as the main raw material for the synthesis of various pesticides, medicines, surfactants, polymer monomers, and antifungal agents

1,2-Cyclopentanedione

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ZHEJIANG JIUZHOU CHEM CO.,LTD

factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin

Cyclooctane-1,2-dione

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Amadis Chemical Co., Ltd.

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

1,2-Cyclopentanedione

Cas:3008-40-0

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Shanghai Jingshi Pharmaceutical Technology Co., Ltd.

We promise quality; We deliver goods timely; We test product purity before delivery;We quote price reasonabl;We guarantee after sale service.Appearance:White or off-white crystalline powder Storage:cool and dry area,avoiding light Package:1g/5g/10g/2

cyclopentane-1,2-dione

Cas:3008-40-0

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Synthetic route

: 504-02-9
1,3-cylohexanedione

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With aluminum (III) chloride; Oxone In water at 20℃; for 1.5h;	97%

: 69578-06-9
2-chlorocyclopentane-1-ol

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With iron(III) chloride hexahydrate In water at 100℃; for 0.166667h;	80%

: 109459-54-3
2-keto cyclopentanone acetal

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With sulfuric acid; silica gel In dichloromethane for 24h; Ambient temperature;	73%
With sulfuric acid; silica gel In dichloromethane	60%

: 109314-64-9
1-nitrocyclopentene oxide

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With chloro-trimethyl-silane; triethylamine Mechanism; 1.) DMSO, dichloromethane, 0 deg C, 5 h; 2.) dichloromethane, 0 -> 30 deg C, 1 h; further α-nitroepoxides;	72%
With triethylamine; tetrakis(triphenylphosphine) palladium(0) In benzene for 7h; Heating;	50%
With chloro-trimethyl-silane; triethylamine 1.) DMSO, dichloromethane, 0 deg C, 5 h; 2.) dichloromethane, 0 -> 30 deg C, 1 h; Yield given. Multistep reaction;
With chloro-trimethyl-silane; triethylamine 1.) CH2Cl2, 0 deg C, 5 h, 2.) CH2Cl2, 0 deg C to r.t., 1 h; Yield given. Multistep reaction;

: 694-28-0
2-chlorocyclopentanone

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With iron(III) chloride In water at 100℃; for 0.333333h;	66.47%

: 10088-87-6
4,5-dioxo-cyclopentane-1,3-dicarboxylic acid diethyl ester

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With hydrogenchloride Heating;	61.7%
With sulfuric acid man giesst auf Eis;
With sulfuric acid
With sulfuric acid

: 52190-34-8
2-(methylthio)cyclopentanone

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With CuCl2-CuO In water; acetone at 35℃; for 0.5h;	60%
With copper(II) oxide; copper dichloride In water; acetone at 35℃; for 0.5h;	60%

: 285-67-6
Cyclopentene oxide

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With oxygen; copper(II) bis(trifluoromethanesulfonate); dimethyl sulfoxide; bismuth at 100℃; for 2h;	52%

: 6838-66-0
1,2-bis((trimethylsilyl)oxy)cyclopent-1-ene

A: 3008-40-0
cyclopentane-1,2-dione

B: 3019-83-8
3-bromo-2-hydroxycyclopent-2-en-1-one

Conditions

Conditions	Yield
With bromine In tetrachloromethane	A 15% B 40%

: 2-acetoxy-5-bromo-cyclopentanone

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With hydrogenchloride

: 872280-63-2
2,3-dioxo-cyclopentanecarboxylic acid ethyl ester

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With sulfuric acid

: 120-92-3
cyclopentanone

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With perchloric acid; bromamine T In water Thermodynamic data; Kinetics; Mechanism; effect of ionic strengths (with p-toluenesulphonamide), solvent isotope ratio (H2O-D2O) and solvent composition (H2O-CH3OH) on reaction rate was measured in the temp.range of 30-45 degC. Energy of activation: 18.26 Kcal/mol; enthropy -15.63 e.u.;
With perchloric acid; tripropylammonium fluorochromate (VI) In water; acetic acid at 24.9℃; Rate constant; Thermodynamic data; ΔH(activ.), ΔS(activ.), ΔG(activ.); further temperatures (308-328 K);
With selenium(IV) oxide; ethanol

: 127-52-6
chloramine-B

: 120-92-3
cyclopentanone

A: 3008-40-0
cyclopentane-1,2-dione

B: 98-10-2
benzenesulfonamide

Conditions

Conditions	Yield
With hydrogenchloride; perchloric acid; sodium perchlorate In ethanol at 30℃; Kinetics; Mechanism; Thermodynamic data; ΔH(excit.), ΔG(excit.), ΔS(excit.), effect of concentration of reactants;

...Expand

: 6,12,13-Trioxa-dispiro[4.1.4.2]tridecan-1-one

A: 3008-40-0
cyclopentane-1,2-dione

B: 120-92-3
cyclopentanone

Conditions

Conditions	Yield
With dimethylsulfide In methanol dry ice-acetone to room temperature; Yields of byproduct given;
With dimethylsulfide In methanol dry ice-acetone to room temperature; Yield given;

: 7446-08-4
selenium(IV) oxide

: 64-17-5
ethanol

: 120-92-3
cyclopentanone

: 3008-40-0
cyclopentane-1,2-dione

...Expand

(+-)-2-chloro-cyclopentanone-(1): (+-)-2-chloro-cyclopentanone-(1)

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With water; iron(III) chloride

4,5-dioxo-cyclopentane-dicarboxylic acid-(1.3)-diethyl ester: 4,5-dioxo-cyclopentane-dicarboxylic acid-(1.3)-diethyl ester

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With carbon dioxide; sulfuric acid

: 694-28-0
2-chlorocyclopentanone

aqueous FeCl3-solution: aqueous FeCl3-solution

: 3008-40-0
cyclopentane-1,2-dione

trans-2,5-dibromo-cyclopentanone: trans-2,5-dibromo-cyclopentanone

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
With water; silver(l) oxide

: 7664-93-9
sulfuric acid

: 10088-87-6
4,5-dioxo-cyclopentane-1,3-dicarboxylic acid diethyl ester

: 3008-40-0
cyclopentane-1,2-dione

: 7664-93-9
sulfuric acid

: 10088-87-6
4,5-dioxo-cyclopentane-1,3-dicarboxylic acid diethyl ester

A: 3008-40-0
cyclopentane-1,2-dione

B: 872280-63-2
2,3-dioxo-cyclopentanecarboxylic acid ethyl ester

Conditions

Conditions	Yield
at 100℃; Product distribution;

...Expand

: 7664-93-9
sulfuric acid

: 872280-63-2
2,3-dioxo-cyclopentanecarboxylic acid ethyl ester

: 3008-40-0
cyclopentane-1,2-dione

cyclopentadiene-(3.5)-diol-(4.5)-dicarboxylic acid-(1.3)-diethyl ester: cyclopentadiene-(3.5)-diol-(4.5)-dicarboxylic acid-(1.3)-diethyl ester

A: 3008-40-0
cyclopentane-1,2-dione

B: 872280-63-2
2,3-dioxo-cyclopentanecarboxylic acid ethyl ester

Conditions

Conditions	Yield
With sulfuric acid at 100℃;

: 109459-50-9
2-hydroxy cyclopentanone acetal

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: 38 percent / CrO3, pyridine / CH2Cl2 / 0.33 h / Ambient temperature 2: 60 percent / H2SO4, silica / CH2Cl2 View Scheme
Multi-step reaction with 2 steps 1: 75 percent / pyridine, Cr2O3, kieselguhr / CH2Cl2 / 0.33 h / Ambient temperature 2: 73 percent / silica gel, 15percent H2SO4 / CH2Cl2 / 24 h / Ambient temperature View Scheme

: 120-92-3
cyclopentanone

diluted alcoholic KOH: diluted alcoholic KOH

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: 1.) NaNH2, Et(OCH2CH2)2OH / 1.) THF, 2 h, 2.) THF 2: 60 percent / CuCl2, CuO / acetone; H2O / 0.5 h / 35 °C View Scheme

: 22987-82-2
1-nitrocyclopentene

: 3008-40-0
cyclopentane-1,2-dione

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: 81 percent / 15percent H2O2, 2N NaOH / methanol / 0.08 h 2: 1.) ClSiMe3, 2.) Et3N / 1.) CH2Cl2, 0 deg C, 5 h, 2.) CH2Cl2, 0 deg C to r.t., 1 h View Scheme

: 3008-40-0
cyclopentane-1,2-dione

: 78-83-1
2-methyl-propan-1-ol

: 5682-74-6
3-isobutoxy-2-cyclopentenone

Conditions

Conditions	Yield
With toluene-4-sulfonic acid at 85℃; for 18h;	95%

: 3008-40-0
cyclopentane-1,2-dione

: 105872-18-2
3-chloro-2-hydroxycyclopent-2-enone

Conditions

Conditions	Yield
With N-chloro-succinimide In water; acetonitrile at 20℃; for 40h; Inert atmosphere;	94%

: 3008-40-0
cyclopentane-1,2-dione

: 41248-13-9
1-hydroxycyclobutane-1-carboxylic acid

Conditions

Conditions	Yield
Stage #1: cyclopentane-1,2-dione With N-benzyl-trimethylammonium hydroxide at 25℃; for 7h; Neat (no solvent); Stage #2: With hydrogenchloride In water pH=2.6;	89%

: 3008-40-0
cyclopentane-1,2-dione

: 3019-83-8
3-bromo-2-hydroxycyclopent-2-en-1-one

Conditions

Conditions	Yield
With N-Bromosuccinimide In water; acetone at 20℃; for 16h;	89%
With N-Bromosuccinimide In water; acetone at 20℃;

: 3008-40-0
cyclopentane-1,2-dione

: 13735-81-4
1-styrenyloxytrimethylsilane

: 3-(2-oxo-2-phenylethyl)cyclopentane-1,2-dione

Conditions

Conditions	Yield
With ammonium cerium(IV) nitrate In acetonitrile at -35℃; Alkylation;	87%

: 3008-40-0
cyclopentane-1,2-dione

: 8-oxa-tricyclo[4.3.0.01,4]non-2-ene-5-methanol

: 2-[(1R,4S,5R,6S)-1-(8-Oxa-tricyclo[4.3.0.01,4]non-2-en-5-yl)methoxy]-cyclopent-2-enone

Conditions

Conditions	Yield
With 3 A molecular sieve; Amberlyst-15 ion exchange resin In dichloromethane at 45℃;	87%

: 3008-40-0
cyclopentane-1,2-dione

: 98-59-9
p-toluenesulfonyl chloride

: 77183-95-0
2-p-toluenesulfonyloxy-2-cyclopentenone

Conditions

Conditions	Yield
With pyridine for 2h; Ambient temperature;	85.6%

: 3008-40-0
cyclopentane-1,2-dione

: 63126-47-6
(2S)-2-(methoxymethyl)-1-pyrrolidine

: 96304-33-5
2-((S)-2-Methoxymethyl-pyrrolidin-1-yl)-cyclopent-2-enone

Conditions

Conditions	Yield
3 A molecular sieve In benzene for 10h; Ambient temperature;	85%

: 3008-40-0
cyclopentane-1,2-dione

: 3634-56-8
isopropyldimethylsilyl chloride

: 2,3-bis-(i-propyldimethyl-siloxy)-cyclopenta-1,3-diene

Conditions

Conditions	Yield
With 1,8-diazabicyclo[5.4.0]undec-7-ene; lithium bromide In tetrahydrofuran at -15 - 45℃;	83%
With 1,8-diazabicyclo[5.4.0]undec-7-ene; lithium bromide In tetrahydrofuran at -15 - 45℃; for 20h;	83.3%

: 3008-40-0
cyclopentane-1,2-dione

: 110551-09-2
1-(3-Amino-5-nitro-naphthalen-2-yl)-tridecan-1-one

: 110551-10-5
2-(8-Nitro-3-tridecanoyl-naphthalen-2-ylamino)-cyclopent-2-enone

Conditions

Conditions	Yield
In acetic acid	78%

: 3008-40-0
cyclopentane-1,2-dione

: 21882-77-9, 53472-13-2
(2,2-diethoxyvinylidene)triphenylphosphorane

A: 40006-64-2
2-Ethoxy-2-cyclopenten-1-on

B: 1099-45-2
ethyl (triphenylphosphoranylidene)acetate

Conditions

Conditions	Yield
In diethyl ether Ambient temperature;	A 75% B n/a

...Expand

: 3008-40-0
cyclopentane-1,2-dione

: 107-18-6
allyl alcohol

: 108461-95-6
2-(allyloxy)cyclopent-2-en-1-one

Conditions

Conditions	Yield
With toluene-4-sulfonic acid for 0.166667h; Dean-Stark; Reflux; regioselective reaction;	74%

: 3008-40-0
cyclopentane-1,2-dione

: 13782-38-2
2,4-dimethylcarbonohydrazide

: 87785-60-2
2,4,9,11-Tetramethyl-1,2,4,5,8,9,11,12-octaazadispiro<5.0.5.3>pentadecan-3,10-dion

Conditions

Conditions	Yield
In acetic acid for 1h;	69%

: 3008-40-0
cyclopentane-1,2-dione

: 463-71-8
thiophosgene

: 112621-65-5
C6H5ClO2S

Conditions

Conditions	Yield
With pyridine In dichloromethane for 0.5h; Ambient temperature;	65%

: 3008-40-0
cyclopentane-1,2-dione

: 100-46-9
benzylamine

: 103025-54-3
2-(Benzylamino)-2-cyclopenten-1-on

Conditions

Conditions	Yield
With toluene-4-sulfonic acid In chloroform Heating;	65%

: 3008-40-0
cyclopentane-1,2-dione

: 1826-67-1
vinyl magnesium bromide

: 27332-51-0
2‐hydroxy‐2‐vinylcyclopentan‐1‐one

Conditions

Conditions	Yield
In tetrahydrofuran at 20℃; Cooling with ice;	64%
In tetrahydrofuran	53%
In tetrahydrofuran

: 3008-40-0
cyclopentane-1,2-dione

: 106-49-0
p-toluidine

: 112152-02-0
2-(4-Methylphenylamino)-2-cyclopenten-1-on

Conditions

Conditions	Yield
	63%

: 3008-40-0
cyclopentane-1,2-dione

: 536-90-3
m-Anisidine

: 112152-08-6
2-((3-methoxyphenyl)amino)cyclopent-2-enone

Conditions

Conditions	Yield
	57%

: 3008-40-0
cyclopentane-1,2-dione

: 814-68-6
acryloyl chloride

: 245660-15-5
(4-{[tert-butyl(dimethyl)silyl]oxy}butyl)amine

: 1005736-34-4
N-[(4-tertbutyldimethylsilyloxy)butyl]-N-(5-oxocyclopentenyl)acrylamide

Conditions

Conditions	Yield
Stage #1: cyclopentane-1,2-dione; (4-{[tert-butyl(dimethyl)silyl]oxy}butyl)amine In benzene for 2h; Heating; Stage #2: acryloyl chloride With N,N-diethylaniline In benzene at 20℃; for 1h; Further stages.;	56%
Stage #1: cyclopentane-1,2-dione; (4-{[tert-butyl(dimethyl)silyl]oxy}butyl)amine In benzene Reflux; Stage #2: acryloyl chloride With N,N-diethylaniline In benzene at 0℃;	56%

...Expand

: 3008-40-0
cyclopentane-1,2-dione

: 1066-54-2
trimethylsilylacetylene

: C10H16O2Si

Conditions

Conditions	Yield
Stage #1: trimethylsilylacetylene With ethylmagnesium bromide In tetrahydrofuran at -5℃; for 0.5h; Inert atmosphere; Stage #2: cyclopentane-1,2-dione In tetrahydrofuran at -5℃; for 2h; Inert atmosphere;	55%

: 3008-40-0
cyclopentane-1,2-dione

: 471913-33-4
4-aminoacridine-3-carbaldehyde

: 225-87-6
benzo[b]-1,10-phenanthroline

Conditions

Conditions	Yield
With potassium hydroxide In ethanol for 20h; Friedlaender reaction; Heating;	52%

: 3008-40-0
cyclopentane-1,2-dione

: 31579-41-6
1,2,3,5,6,7-hexahydrodicyclopenta[b,e]pyrazine

Conditions

Conditions	Yield
With ammonium formate In N,N-dimethyl-formamide at 85℃; for 2h; Schlenk technique; Inert atmosphere;	51%

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Antimex Chemical Limied

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