2-Isopropyl-1,3-cyclopentandion | 824-19-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-Isopropyl-1,3-cyclopentandion
• 英文别名: 2-Isopropylcyclopentane-1,3-dione；2-propan-2-ylcyclopentane-1,3-dione
• CAS: 824-19-1
• 化学式: C₈H₁₂O₂
• 分子量: 140.182
• InChiKey: WTEVTPRVVNSLTM-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  10
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  34.1
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-Isopropyl-1,3-cyclopentandion 在 碘 、 三乙胺 、 三苯基膦 作用下， 以 乙腈 为溶剂， 反应 15.0h， 以78%的产率得到3-iodo-2-isopropylcyclopent-2-en-1-one
  参考文献：
  名称：

  合成新型结构简化的雌激素类似物。

  摘要：

  通过五至七步合成过程，制备了在环A和D处包含不同取代基的17种新颖雌激素类似物3和4（类固醇命名法）的文库。关键的转变是类型7或8的环状乙烯基碘与类型9的苯乙炔的Sonogashira偶联。3中酮基功能的降低产生了雌二醇类似物5。

  DOI：

  10.1002/chem.200701600
• 作为产物：
  描述：

  3-isopropyl-1,2,4-cyclopentanetrione 生成 2-Isopropyl-1,3-cyclopentandion
  参考文献：
  名称：

  Syntheses of 1, 3-Cyclopentanediones

  摘要：

  用已知的方法合成了 2-乙基、2-异丙基和 2-苄基-1，3-环戊二酮。2- 甲基-3-氧代己二酸二乙酯在叔丁醇钾的加热下环化成 2-甲基-1，3-环戊二酮。用克莱门森法将 3-甲基-1，2，4-环戊四酮还原成 2-甲基-1，3-环戊二酮。

  DOI：

  10.1248/cpb.13.1359

文献信息

• Enamine derivatives
  申请人：——

  公开号：US20020037909A1

  公开（公告）日：2002-03-28

  Enamine derivatives of formula (1) are described: 1 wherein R 1 is a group Ar 1 L 2 Ar 2 Alk- in which Ar 1 is an aromatic or heteroaromatic group, L 2 is a covalent bond or a linker atom or group, Ar 2 is an arylene or heteroarylene group and Alk is a chain —CH 2 —CH(R)—, —CH═C(R)— or 2 in which R is a carboxylic acid or a derivative or biostere thereof; R 2 is a hydrogen atom or a C 1-6 alkyl group; Cy is a cycloaliphatic or heterocycloaliphatic ring in which X is a N atom or a C(R w ) group; R x is a oxo, thioxo, or imino group; R w and R z is each a hydrogen atom or optional substituent; provided that Cy is not a cyclobutenedione group; and the salts, solvates, hydrates and N-oxides thereof. The compounds are able to inhibit the binding of integrins to their ligands and are of use in the prophylaxis and treatment of immune or inflammatory disorders, or disorders involving the inappropriate growth or migration of cells.

  描述了公式（1）的Enamine衍生物：其中R1是Ar1L2Ar2Alk-中的一个基团，其中Ar1是芳香族或杂环芳基，L2是共价键或连接原子或基团，Ar2是芳基或杂环芳基，Alk是链—CH2—CH（R）—，—CH═C（R）—或其中R是羧酸或其衍生物或生物类似物；R2是氢原子或C1-6烷基基团；Cy是环脂环或杂环脂环，其中X是N原子或C（Rw）基团；Rx是氧化、硫代氧化或亚胺基团；Rw和Rz分别是氢原子或可选取代基；前提是Cy不是环丁二酮基团；以及它们的盐、溶剂合物、水合物和N-氧化物。这些化合物能够抑制整合素与其配体的结合，并可用于预防和治疗免疫或炎症性疾病，或涉及细胞异常生长或迁移的疾病。
• Synthetic Studies toward Sordarin: Building Blocks for the Terpenoid Core and for Analogues Thereof
  作者：Arnaud Schulé、Huan Liang、Jean-Pierre Vors、Marco A. Ciufolini

  DOI：10.1021/jo801911s

  日期：2009.2.20

  bi- and tricyclic building blocks for the elaboration of sordaricin and its analogues are described. The target molecules were obtained through inter- and intramolecular Diels−Alder reactions of a number of previously unknown cyclopentadienes. Unusual properties of 3-cyanoenones and 1-cyanocyclopentadienes have been unveiled and circumvented.

  描述了用于制造索达霉素及其类似物的双环和三环结构单元的途径。目标分子是通过许多先前未知的环戊二烯的分子间和分子内Diels-Alder反应获得的。3-氰基烯酮和1-氰基环戊二烯的不寻常特性已经被揭开并被规避。
• Direct amino acid-catalyzed cascade biomimetic reductive alkylations: application to the asymmetric synthesis of Hajos–Parrish ketone analogues
  作者：Dhevalapally B. Ramachary、Mamillapalli Kishor

  DOI：10.1039/b807999d

  日期：——

  and enantioselective process for the double cascade synthesis of highly substituted 2-alkyl-cyclopentane-1,3-diones, 2-alkyl-3-methoxy-cyclopent-2-enones and Hajos-Parrish (H-P) ketone analogs is presented via reductive alkylation chemistry. For the first time, we have developed a single-step alkylation of cyclopentane-1,3-dione with aldehydes/ketones and a Hantzsch ester through an organocatalytic reductive

  直接氨基酸催化的化学和对映选择性工艺，用于高度取代的2-烷基-环戊烷-1,3-二酮，2-烷基-3-甲氧基-环戊-2-烯酮和Hajos-Parrish（HP酮类似物是通过还原烷基化化学方法得到的。通过有机催化还原烷基化策略，我们首次开发了通过醛/酮和Hantzsch酯的环戊烷1,3-二酮单步烷基化。氨基酸催化的级联烯化-加氢和环戊烷-1,3-二酮，醛/酮，Hantzsch酯和甲基乙烯基酮的级联罗宾逊环化的直接组合提供了高官能度的HP酮类似物，具有良好的高收率，并且具有优异的对映选择性。
• Synthesis of (±)-14-<i>epi</i>-hydroxydolasta-1(15),7,9-triene and (±)-7-<i>epi</i>-acetoxy-14-<i>epi</i>-hydroxydolasta-1(15),8-diene^*Taken in part from the Ph.D. dissertation of Jianhua Yu, University of Georgia, Athens, Georgia, USA, 2009.
  作者：George Majetich、Jianhua Yu

  DOI：10.1139/v11-116

  日期：2012.1

  1,3-Dimethyl-2-nitrobenzene was converted to the key intramolecular Friedel–Crafts intermediate 24 in ten steps. Treatment of 24 with TiCl₄ produced tricyclic enone 25 in 61%–75% yield, having the requisite trans relationship of the two angular methyl groups and many of the salient features of the dolastane diterpenes. The structure of enone 25 was verified by X-ray crystallography analysis. Cyclization product 25 permitted the facile synthesis of (±)-14-epi-hydroxydolasta-1(15),7,9-triene and (±)-7-epi-acetoxy-14-epi-hydroxydolasta-1(15),8-diene, which are detailed in this article.

  1,3-二甲基-2-硝基苯被转化为关键的分子内Friedel-Crafts中间体24，经过十个步骤。用TiCl₄处理24产生三环烯酮25，收率为61%–75%，具有两个角甲基的必需的反式关系和多个dolastane二萜的显著特征。通过X射线晶体学分析验证了烯酮25的结构。环化产物25促进了(±)-14-epi-hydroxydolasta-1(15),7,9-三烯和(±)-7-epi-acetoxy-14-epi-hydroxydolasta-1(15),8-二烯的简便合成，这些在本文中有详细描述。
• Syntheses of 1, 3-Cyclopentanediones
  作者：Kentaro Hiraga

  DOI：10.1248/cpb.13.1359

  日期：——

  2-Ethyl, 2-isopropyl and 2-benzyl-1, 3-cyclopentanediones were synthesized by the known method. Diethyl 2-methyl-3-oxoadipate was cyclized to 2-methyl-1, 3-cyclopentanedione by heating with potassium tert-butoxide. 3-Methyl-1, 2, 4-cyclopentanetrione was reduced to 2-methyl-1, 3-cyclopentanedione by Clemmensen method.

  用已知的方法合成了 2-乙基、2-异丙基和 2-苄基-1，3-环戊二酮。2- 甲基-3-氧代己二酸二乙酯在叔丁醇钾的加热下环化成 2-甲基-1，3-环戊二酮。用克莱门森法将 3-甲基-1，2，4-环戊四酮还原成 2-甲基-1，3-环戊二酮。