CAS: 21835-01-8; 3-Ethyl-2-Hydroxy-2-Cyclopenten-1-One

相似化合物

80-71-7 10493-98-8 42348-12-9

上下游产品

2-methyl-1-oxa-spiro[2.4]heptan-4-one 2‐hydroxy‐2‐vinylcyclopentan‐1‐one 1-acetoxy-2,5-heptandion 2,3-epoxy-2-ethyl-cyclopentanone 2-ethyl-5-oxotetrahydrofuran-2-carboxylic acid (S)-2-ethyl-5-oxotetrahydrofuran-2-carboxylic acid 4-oxohexanoic acid 7H10O4C7H10O4

甲基环戊烯醇酮置于sodium Hydroxide体系中,化学反应生成乙基环戊烯醇酮
参考文献:从咖啡中分离出来的一些环状二酮的合成
标题:从咖啡中分离出来的一些环状二酮的合成
摘要:描述了环戊烷-1,2-二酮(环戊-2-En-2-Ol-1-One)的几种烷基化衍生物的合成,其中四种在烘焙咖啡2中已被预先鉴定.
Doi:10.1016/0040-4020(63)85019-X

专利信息

专利号:US-8148568-B2
优先权日:2006-05-25
标题 :Esters of (2-hydroxy-3-oxo-cyclopent-1-enyl) acetic acid and their use for preparing (−)-R-homocitric acid gamma-lactone, (+)-S-homocitric acid gamma-lactone and the corresponding (−)-R-homocitric acid and (+)-S-homocitric acid salts
发明人：LOPP MARGUS; PAJU ANNE; EEK MARGUS; LAOS MARIT; PEHK TONIS; JAALAID RAISSA
权利人:LOPP MARGUS; PAJU ANNE; EEK MARGUS; LAOS MARIT; PEHK TONIS; JAALAID RAISSA; UNIV TALLINN TECHNOLOGY; CAMBREX TALLINN AS
摘要:Archiral (2-hydroxy-3-oxo-cyclopent-1-enyl) acetic acid) alkyl, alkylphenyl and phenyl esters, and a simple and efficient method for the synthesis of both enantiomers of homocitric acid gamma-lactone and the corresponding salts from these esters are described. The method is based on asymmetric oxidation of esters, and the steps of basic and acidic hydrolysis and final acidic lactonization of the homocitric acid into homocitric acid gamma-lactone. The homocitric acid salts are obtained after basic treatment of homocitric acid gamma-lactone. The esters, conditions and reagents used in chemical conversion and separating products are important constituents affording efficient and simple method for production of homocitric acid gamma-lactone and homocitric acid salts.

专利号:US-4359586-A
优先权日:1981-02-12
标 题:Synthesis 2-alkyl cyclopentenolones
发明人：HO TSE-LOK; LIU SHING-HOU
权利人:SCM CORP
摘要:2-Hydroxy-3-methylcyclopent-2-en-1-one was synthesized in a five-step synthesis starting from 2-methyl-1,3-butadiene. Novel intermediate steps include the hot tube isomerization of 1,1-dihalo-2-methyl-2-vinylcyclopropane to give 1-methyl-4,4-dihalocyclopent-1-ene, hydrolysis to 3-methyl-2-cyclopenten-1-one, epoxidation of the latter using a phase transfer catalyst, followed by catalyzed isomerization to produce 2-hydroxy-3-methylcyclopent-2-en-1-one in high overall yield.