1-Cyclopentene-1-carboxylicacid,3-oxo-,methylester(9CI)
- Product Name
- 1-Cyclopentene-1-carboxylicacid,3-oxo-,methylester(9CI)
- CAS No.
- 108384-35-6
- Chemical Name
- 1-Cyclopentene-1-carboxylicacid,3-oxo-,methylester(9CI)
- Synonyms
- Methyl 3-oxocyclopent-1-enecarboxylate;methyl 3-oxocyclopent-1-ene-1-carboxylate;3-Oxo-1-cyclopentene-1-carboxylic acid methyl ester;1-Cyclopentene-1-carboxylic acid,3-oxo-,methyl ester;1-Cyclopentene-1-carboxylicacid,3-oxo-,methylester(9CI)
- CBNumber
- CB91300287
- Molecular Formula
- C7H8O3
- Formula Weight
- 140.14
- MOL File
- 108384-35-6.mol
1-Cyclopentene-1-carboxylicacid,3-oxo-,methylester(9CI) Property
- storage temp.
- 2-8°C
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash hands thoroughly after handling.
P264Wash skin thouroughly after handling.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P312Call a POISON CENTER or doctor/physician if you feel unwell.
P321Specific treatment (see … on this label).
P332+P313IF SKIN irritation occurs: Get medical advice/attention.
P337+P313IF eye irritation persists: Get medical advice/attention.
P362Take off contaminated clothing and wash before reuse.
P403+P233Store in a well-ventilated place. Keep container tightly closed.
P405Store locked up.
P501Dispose of contents/container to..…
N-Bromosuccinimide Price
- Product number
- M221235
- Product name
- Methyl3-Oxocyclopent-1-enecarboxylate
- Packaging
- 100mg
- Price
- $265
- Updated
- 2021/12/16
- Product number
- X3410
- Product name
- 1-Cyclopentene-1-carboxylicacid,3-oxo,methylester
- Packaging
- 1g
- Price
- $435
- Updated
- 2021/12/16
- Product number
- 187965
- Product name
- Methyl 3-oxocyclopent-1-enecarboxylate
- Packaging
- 500mg
- Price
- $526
- Updated
- 2021/12/16
- Product number
- 187965
- Product name
- Methyl 3-oxocyclopent-1-enecarboxylate
- Packaging
- 1g
- Price
- $900
- Updated
- 2021/12/16
- Product number
- X3410
- Product name
- 1-Cyclopentene-1-carboxylicacid,3-oxo,methylester
- Packaging
- 250mg
- Price
- $203
- Updated
- 2021/12/16
1-Cyclopentene-1-carboxylicacid,3-oxo-,methylester(9CI) Chemical Properties,Usage,Production
Synthesis
25662-28-6
108384-35-6
Experimental Procedure - Part 1: Step 1 - Oxidation of Carboxymethylcyclopentene: Procedure: To a 2L round bottom flask (pre-cooled to 0°C) equipped with a magnetic stirrer and internal thermometer was added acetic anhydride (615g, 570mL, 6.02mol). Under continuous stirring and controlled exothermic conditions, chromium trioxide (214 g, 2.14 mol) was added in batches. The resulting dark red solution was stirred until the chromium trioxide was completely dissolved and the temperature was reduced to 20 °C. A 5L three-necked flask was equipped with a dropping funnel, a top stirring device, a nitrogen inlet and an internal thermometer and a solution of methyl cyclopentene-1-carboxylate (100g, 101mL, 0.793mol) dissolved in 1.4L of dichloromethane was added to it. The prepared oxidized solution of chromium trioxide and acetic anhydride was transferred to a dropping funnel and slowly added dropwise to the reaction mixture, ensuring that the internal temperature was maintained at 10-14 °C. At the beginning of the dropwise addition, the reaction solution was gradually darkened from yellow color. Due to laboratory equipment limitations, the reaction was carried out in two batches, and each batch was operated as follows: the dark, homogeneous solution obtained from the reaction was carefully transferred to a 4L beaker fitted with an overhead stirrer. The reaction flask was rinsed with 250 mL of dichloromethane and the washings were combined. 500mL of water was added to the reaction mixture followed by slow addition of 10g of sodium bicarbonate and gas release was observed. The remaining sodium bicarbonate (830 g, 10 mol) was added in batches with the stirring rate maintained at 500 rpm. The dark green suspension obtained was diluted with 1 L of water and filtered through a 3 L sintered funnel fitted with a 1 cm Solka-Floc pad. The filtrate was extracted with dichloromethane (3 x 1 L), the organic phases were combined and dried with anhydrous magnesium sulfate, filtered and concentrated under reduced pressure to give a light green oil. The oil was distilled through a 30 cm Vigreux column and recrystallized with methyl tert-butyl ether:hexane (1:10, total volume 55 mL) to give 38.4 g of methyl 3-oxocyclopent-1-enecarboxylate (35% yield) as a white crystalline solid.
References
[1] Journal of the American Chemical Society, 2004, vol. 126, # 42, p. 13622 - 13623
[2] Organic and Biomolecular Chemistry, 2008, vol. 6, # 12, p. 2195 - 2203
[3] Green Chemistry, 2017, vol. 19, # 2, p. 511 - 518
[4] Patent: WO2008/21029, 2008, A2. Location in patent: Page/Page column 39; 47
[5] Journal of Organometallic Chemistry, 2007, vol. 692, # 24, p. 5523 - 5527
1-Cyclopentene-1-carboxylicacid,3-oxo-,methylester(9CI) Preparation Products And Raw materials
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