2-циклопентенон
2-циклопентенон атрибут
| Температура кипения: |
64-65 °C19 mm Hg(lit.) |
| плотность: |
0.98 g/mL at 25 °C(lit.) |
| показатель преломления: |
n20/D 1.481(lit.) |
| Fp: |
108 °F |
| температура хранения: |
2-8°C |
| растворимость: |
soluble in Chloroform, Methanol |
| форма: |
жидкость |
| цвет: |
Ясно-желтый |
| Удельный вес: |
0.980 |
| Растворимость в воде: |
почти нерастворимый |
| БРН: |
1446054 |
| InChI: |
InChI=1S/C5H6O/c6-5-3-1-2-4-5/h1,3H,2,4H2 |
| ИнЧИКей: |
BZKFMUIJRXWWQK-UHFFFAOYSA-N |
| SMILES: |
C1(=O)CCC=C1 |
| LogP: |
-0.114 (est) |
| Справочник по базе данных CAS: |
930-30-3(CAS DataBase Reference) |
| Рейтинг продуктов питания EWG: |
1 |
| FDA UNII: |
Q0U2IGF9CK |
| Справочник по химии NIST: |
2-Cyclopenten-1-one(930-30-3) |
2-циклопентенон химические свойства, назначение, производство
Химические свойства
clear yellow liquid
Использование
2-Cyclopenten-1-one is a versatile electrophile employed in various addition reactions including conjugate addition of organocopper nucleophiles, Michael reaction with silyl enol ethers and siloxanes. It is also used in Diels-Alder cycloadditions and phosphoniosilylations.
Подготовка
2-Cyclopentenones can be synthesized in a number of ways. One of the routes involves elimination of α-bromo-cyclopentanone using lithium carbonate and Claisen condensation-decarboxylation-isomerization cascades of unsaturated diesters as shown below.
The acid-catalyzed dehydration of cyclopentanediols affords cyclopentenone.
As a functional group, the synthesis of 2-cyclopentenones is accomplished in a variety of other ways, including the Nazarov cyclization reaction from divinyl ketones, Saegusa–Ito oxidation from cyclopentanones, ring-closing metathesis from the corresponding dienes, oxidation of the corresponding cyclic allylic alcohols, and the Pauson–Khand reaction from alkenes, alkynes, and carbon monoxide.
en.wikipedia.orgиспользованная литература
[1] A Rossi, M G Santoro, G Elia. “2-Cyclopenten-1-one, a new inducer of heat shock protein 70 with antiviral activity.” The Journal of Biological Chemistry 271 50 (1996): 32192–6.
2-циклопентенон препаратная продукция и сырье
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2-циклопентенон поставщик
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