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3-Cyclopentyl-3-oxo-propionic acid ethyl ester, a chemical compound with the molecular formula C9H14O3, is an ester derived from the condensation of cyclopentylacetic acid and ethanol. It is characterized by its strong odor and is classified as a flammable liquid. 3-CYCLOPENTYL-3-OXO-PROPIONIC ACID ETHYL ESTER is widely recognized for its applications in the pharmaceutical industry as an intermediate in the synthesis of various drugs, as well as in the production of fragrances and flavors due to its distinctive aroma. Furthermore, it has garnered interest in the field of organic chemistry and drug development for its potential applications.

24922-00-7

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24922-00-7 Usage

Uses

Used in Pharmaceutical Industry:
3-Cyclopentyl-3-oxo-propionic acid ethyl ester is used as a pharmaceutical intermediate for the synthesis of various drugs. Its unique chemical structure allows it to serve as a key component in the development of new medications, contributing to the advancement of healthcare and treatment options.
Used in Fragrance and Flavor Production:
Leveraging its characteristic aroma, 3-Cyclopentyl-3-oxo-propionic acid ethyl ester is utilized as a component in the production of fragrances and flavors. Its strong odor makes it a valuable addition to the creation of scents and tastes in various consumer products, enhancing the sensory experience for users.
Used in Organic Chemistry Research:
3-Cyclopentyl-3-oxo-propionic acid ethyl ester is employed in the field of organic chemistry for research purposes. Its unique properties and reactivity make it a subject of interest for scientists exploring new chemical reactions and synthesis pathways, potentially leading to the discovery of novel compounds and applications.
Used in Drug Development:
3-CYCLOPENTYL-3-OXO-PROPIONIC ACID ETHYL ESTER has been studied for its potential applications in drug development. Its involvement in the synthesis of various drugs highlights its importance in the pharmaceutical sector, as it may contribute to the creation of innovative treatments and therapies for a range of medical conditions.

Check Digit Verification of cas no

The CAS Registry Mumber 24922-00-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,4,9,2 and 2 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 24922-00:
(7*2)+(6*4)+(5*9)+(4*2)+(3*2)+(2*0)+(1*0)=97
97 % 10 = 7
So 24922-00-7 is a valid CAS Registry Number.
InChI:InChI=1/C10H16O3/c1-2-13-10(12)7-9(11)8-5-3-4-6-8/h8H,2-7H2,1H3

24922-00-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name ethyl 3-cyclopentyl-3-oxopropanoate

1.2 Other means of identification

Product number -
Other names 3-cyclopentyl-3-oxo-propionic acid ethyl ester

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:24922-00-7 SDS

24922-00-7Synthetic route

6-bicyclo<3.1.0>hexan-6-ol
71911-64-3

6-bicyclo<3.1.0>hexan-6-ol

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

Conditions
ConditionsYield
In neat (no solvent) at 110℃;99%
3-cyclopentyl-2-diazo-3-hydroxy-propionic acid ethyl ester
811467-21-7

3-cyclopentyl-2-diazo-3-hydroxy-propionic acid ethyl ester

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

Conditions
ConditionsYield
With copper(II) sulfate at 20℃; for 3h;91%
Cyclopentanecarboxylic acid chloride
4524-93-0

Cyclopentanecarboxylic acid chloride

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

Conditions
ConditionsYield
Stage #1: hydrogen ethyl malonate With [2,2]bipyridinyl; n-butyllithium In hexanes at -65 - -55℃;
Stage #2: Cyclopentanecarboxylic acid chloride In hexanes at 20℃;
89%
Multi-step reaction with 2 steps
1: pyridine / CH2Cl2 / 2 h / 0 - 20 °C
2: toluene / 24 h / 80 °C
View Scheme
Cyclopentanecarboxylic acid chloride
4524-93-0

Cyclopentanecarboxylic acid chloride

ethyl potassium malonate
6148-64-7

ethyl potassium malonate

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

Conditions
ConditionsYield
With triethylamine; magnesium chloride In acetonitrile at 0℃; for 4h;77%
6-bicyclo<3.1.0>hexan-6-ol
71911-61-0

6-bicyclo<3.1.0>hexan-6-ol

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

Conditions
ConditionsYield
at 300℃; for 1h;52%
2-cyclopentanecarbonyl-3-oxo-butyric acid ethyl ester
412018-99-6

2-cyclopentanecarbonyl-3-oxo-butyric acid ethyl ester

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

Conditions
ConditionsYield
With diethyl ether; ammonia
1-cyclopentylethanone
6004-60-0

1-cyclopentylethanone

Diethyl carbonate
105-58-8

Diethyl carbonate

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

Conditions
ConditionsYield
With sodium amide
ethanol
64-17-5

ethanol

5-(cyclopentanecarbonyl)2,2-dimethyl-1,3-dioxane-4,6-dione
134302-12-8

5-(cyclopentanecarbonyl)2,2-dimethyl-1,3-dioxane-4,6-dione

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

Conditions
ConditionsYield
In toluene at 80℃; for 24h; Yield given;
diethyl malonate
105-53-3

diethyl malonate

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 1) Na / 1. benzene, reflux, 8 h; 2. 2h at 0 deg C, then 6 h room temp.
2: 52 percent / 1 h / 300 °C
View Scheme
Cyclopentanecarboxylic acid chloride
4524-93-0

Cyclopentanecarboxylic acid chloride

ethyl acetate
141-78-6

ethyl acetate

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

Conditions
ConditionsYield
Stage #1: ethyl acetate With n-butyllithium; diisopropylamine In tetrahydrofuran; hexane at -78℃; for 0.0833333h; Inert atmosphere;
Stage #2: Cyclopentanecarboxylic acid chloride In tetrahydrofuran; hexane at -78℃; for 0.0833333h;
Cyclopentanecarboxylic acid chloride
4524-93-0

Cyclopentanecarboxylic acid chloride

ethyl acetate
141-78-6

ethyl acetate

A

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

B

C10H16O3

C10H16O3

Conditions
ConditionsYield
Stage #1: ethyl acetate With potassium hexamethylsilazane In tetrahydrofuran at -78℃; for 0.25h;
Stage #2: Cyclopentanecarboxylic acid chloride In tetrahydrofuran at -78℃; for 2h; Overall yield = 643 mg;
cyclopentanecarboxylic acid
3400-45-1

cyclopentanecarboxylic acid

A

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

B

C10H16O3

C10H16O3

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 0 - 20 °C
2.1: potassium hexamethylsilazane / tetrahydrofuran / 0.25 h / -78 °C
2.2: 2 h / -78 °C
View Scheme
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

guanidine hydrochloride
50-01-1

guanidine hydrochloride

2-amino-6-cyclopentyl-4-hydroxypyrimidine

2-amino-6-cyclopentyl-4-hydroxypyrimidine

Conditions
ConditionsYield
With potassium tert-butylate In methanol at 23 - 60℃;88%
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

guanidine hydrochloride
50-01-1

guanidine hydrochloride

2-amino-6-cyclopentyl-3H-pyrimidin-4-one
199863-76-8

2-amino-6-cyclopentyl-3H-pyrimidin-4-one

Conditions
ConditionsYield
Stage #1: ethyl 3-cyclopentyl-3-oxopropionate; guanidine hydrochloride With potassium tert-butylate In methanol at 20 - 60℃;
Stage #2: With hydrogenchloride In methanol; water pH=5;
87%
With potassium tert-butylate In methanol at 23 - 60℃;
2,6-di-tert-butyl-4-(4-methoxybenzylidene)-cyclohexa-2,5-dienone
71711-98-3

2,6-di-tert-butyl-4-(4-methoxybenzylidene)-cyclohexa-2,5-dienone

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

C32H44O5

C32H44O5

Conditions
ConditionsYield
With C51H62N2O2; copper(II) bis(trifluoromethanesulfonate) In tetrahydrofuran at -15℃; for 18h; enantioselective reaction;86%
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

3-cyclopentyl-2-methoxy-3-oxo-propionic acid methyl ester
1046450-99-0

3-cyclopentyl-2-methoxy-3-oxo-propionic acid methyl ester

Conditions
ConditionsYield
Stage #1: ethyl 3-cyclopentyl-3-oxopropionate With [bis(acetoxy)iodo]benzene; boron trifluoride diethyl etherate In methanol at 20℃;
Stage #2: With water; sodium hydrogencarbonate In dichloromethane
43%
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

acetic acid
64-19-7

acetic acid

2-amino-1-cyclopentyl-ethanone
89895-04-5

2-amino-1-cyclopentyl-ethanone

Conditions
ConditionsYield
With sodium nitrite Behandeln des Reaktionsprodukts mit Zink und Acetanhydrid unter Zusatz von Eis und Erhitzen des danach isolierten Reaktionsprodukts mit wss. Salzsaeure;
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

thiourea
17356-08-0

thiourea

6-cyclopentyl-2-thioxo-2,3-dihydro-1H-pyrimidin-4-one

6-cyclopentyl-2-thioxo-2,3-dihydro-1H-pyrimidin-4-one

Conditions
ConditionsYield
With ethanol; sodium ethanolate
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

A

5-cyclopentylisoxazol-3-ol
27772-74-3

5-cyclopentylisoxazol-3-ol

B

3-cyclopentyl-2H-isoxazol-5-one
29068-27-7

3-cyclopentyl-2H-isoxazol-5-one

Conditions
ConditionsYield
(i) NH2OH*HCl, aq. NaOH, (ii) aq. HCl; Multistep reaction;
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

3-cyclopentyl-2H-isoxazol-5-one
29871-87-2

3-cyclopentyl-2H-isoxazol-5-one

Conditions
ConditionsYield
With hydroxylamine hydrochloride
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

ethyl bromoacetate
105-36-2

ethyl bromoacetate

diethyl 2-(cyclopentanecarbonyl)succinate
1057673-87-6

diethyl 2-(cyclopentanecarbonyl)succinate

Conditions
ConditionsYield
With sodium In ethanol
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

4-methoxybenzoic acid hydrazide
3290-99-1

4-methoxybenzoic acid hydrazide

3-Cyclopentyl-3-[(4-methoxy-benzoyl)-hydrazono]-propionic acid ethyl ester

3-Cyclopentyl-3-[(4-methoxy-benzoyl)-hydrazono]-propionic acid ethyl ester

Conditions
ConditionsYield
In isopropyl alcohol for 0.5h; Heating;
2,6-dichlorobenzohydroximoyl chloride
6579-27-7

2,6-dichlorobenzohydroximoyl chloride

ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

ethyl 5-cyclopentyl-3-(2,6-dichlorophenyl)-4-isoxazolecarboxylate
1020568-84-6

ethyl 5-cyclopentyl-3-(2,6-dichlorophenyl)-4-isoxazolecarboxylate

Conditions
ConditionsYield
With sodium ethanolate In tetrahydrofuran; ethanol at 0 - 20℃;
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

4-cyclopentyl-4-oxobutanoic acid
3400-90-6

4-cyclopentyl-4-oxobutanoic acid

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: Na / ethanol
2: aq. HCl
View Scheme
ethyl 3-cyclopentyl-3-oxopropionate
24922-00-7

ethyl 3-cyclopentyl-3-oxopropionate

3-cyclopentyl-5-methoxy-isoxazole
29871-78-1

3-cyclopentyl-5-methoxy-isoxazole

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: NH2OH*HCl
View Scheme

24922-00-7Relevant articles and documents

ALCOHOL DERIVATIVES AS KV7 POTASSIUM CHANNEL OPENERS

-

Paragraph 0385-0386; 0392-0393, (2021/02/05)

The present invention provides novel compounds which activate the Kv7 potassium channels. Separate aspects of the invention are directed to pharmaceutical compositions comprising said compounds and uses of the compounds to treat disorders responsive to the activation of Kv7 potassium channels.

Modular Tuning of Electrophilic Reactivity of Iridium Nitrenoids for the Intermolecular Selective α-Amidation of β-Keto Esters

Lee, Minhan,Jung, Hoimin,Kim, Dongwook,Park, Jung-Woo,Chang, Sukbok

, p. 11999 - 12004 (2020/08/06)

We report herein an Ir-catalyzed intermolecular amino group transfer to β-keto esters (amides) to access α-aminocarbonyl products with excellent chemoselectivity. The key strategy was to engineer electrophilicity of the putative Ir-nitrenoids by tuning electronic property of the κ2-N,O chelating ligands, thus facilitating nucleophilic addition of enol π-bonds of 1,3-dicarbonyl substrates.

BIARYL PYRAZOLES AS NRF2 REGULATORS

-

Page/Page column 156; 157, (2017/08/01)

The present invention relates to biaryl pyrazole compounds, methods of making them, pharmaceutical compositions containing them and their use as NRF2 regulators.

GLYCINE B ANTAGONISTS

-

Page/Page column 67-68, (2010/12/29)

The invention relates to pyrazolopyrimidine derivatives as well as their pharmaceutically acceptable salts. The invention further relates to a process for the preparation of such compounds. The compounds of the invention are glycine B antagonists and are therefore useful for the control and prevention of various disorders, including neurological disorders.

CuSO4-catalyzed diazo decomposition in water: a practical synthesis of β-keto esters

Liao, Mingyi,Wang, Jianbo

, p. 8859 - 8861 (2007/10/03)

CuSO4 was found to be an efficient catalyst for the diazo decomposition of β-hydroxy α-diazoesters in water. 1,2-H shift occurred efficiently to give β-keto esters in high yields. No O-H bond insertion products were identified.

A3 adenosine receptor antagonists

-

, (2008/06/13)

Disclosed are pyridine and dihydropyridine derivatives, pharmaceutical compositions comprising one or more of these derivatives, and a method of selectively blocking an A3adenosine receptor of a mammal by the use of one or more of these derivatives. An example of the pyridine derivative is of the formula (I): wherein R2is ethyl, R3is ethylsulfanyl; R4is ethyl, propyl, or hydroxypropyl; R5is ethyl, propyl, fluoroethyl, or fluoropropyl; and R6is phenyl or fluorophenyl. The derivatives of the present invention can be used for inhibiting binding of ligands to an adenosine receptor. The derivatives also can be used for characterizing an adenosine receptor.

ARYL PYRIMIDINE DERIVATIVES

-

, (2008/06/13)

The disclosed pyrimidine derivatives, and pharmaceutically acceptable salts and N-oxides thereof, exhibit useful pharmacological properties, in particular use as selective 5HT 2B-antagonists. The invention is also directed to formulations and methods for treatment.

ARYL PYRIMIDINE DERIVATIVES

-

, (2008/06/13)

The aryl pyrimidine derivatives and pharmaceutically acceptable salts and N-oxides thereof, exhibit useful pharmacological properties, including utility as selective 5HT 2B-antagonists.

ARYL PYRIMIDINE DERIVATIVES AND USES THEREOF

-

, (2008/06/13)

The aryl pyrimidine derivatives and pharmaceutically acceptable salts and N-oxides thereof, exhibit useful pharmacological properties, including utility as selective 5HT 2B-antagonists. The 5-HT 2B antagonist is a compound of the formula: STR1 wherein: R. sup.1 is hydrogen, alkyl, lower alkoxy, hydroxyalkyl, cycloalkyl, cycloalkyl lower alkyl, alkenyl, lower thioalkoxy, halo, fluoroalkyl,--NR 6 R. sup.7,--CO 2 R 8,--O(CH 2) n R 9, or lower alkyl optionally substituted with hydroxy, alkoxy, halo, or aryl; in which n is 1, 2, or 3;R 6 and R 7 are hydrogen or lower alkyl; R 8 is hydrogen or lower alkyl; andR 9 is hydrogen, lower alkyl, hydroxy, hydroxy lower alkyl, lower alkenyl, or lower alkoxy;R. sup.2 is hydrogen, lower alkyl, lower alkoxy, halo, or lower fluoroalkyl; R 3 is optionally substituted aryl other than pyridyl, thienyl, or furanyl;R 4 is hydrogen, lower alkyl, cycloalkyl, alkenyl, acyl, amino, amido, aryl,--(CH 2) m NR. sup.10 R 11, or lower alkyl optionally substituted by amino, monosubstituted amino, disubstituted amino, hydroxy, carboxy, aryl, lower alkoxy, amido, alkoxy carbonyl, tetrahydrofuran-2-yl, hydroxyalkoxy, or sulfonamido;in whichR 10 and R. sup.11 are hydrogen or lower alkyl; andR 5 is hydrogen or lower alkyl; provided that: (i) when R 3 is naphthyl, indol-1-yl, or 2,3-dihydroindol-1-yl, and R 2, R 4 and R 5 are all hydrogen, R. sup.1 is not methyl; (ii) when R 3 is phenyl or naphthyl, R 1 is not--NR 6 R 7 ;(iii) when R 3 is phenyl, R 2 is not lower alkoxy, and R 1 and R 2 are not halo;(iv) when R 3 is phenyl and R 1 is H, R 2 is not methyl; and (v) when R 3 is 1,2,3,4-tetrahydroquinolinyl, R 4 and R. sup.5 are hydrogen;or a pharmaceutically acceptable salt or N-oxide thereof.

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