2-ethyl-3-(isobutyloxy)cyclopent-2-en-1-one | 72419-93-3

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 乙烯酯类
• 英文名称: 2-ethyl-3-(isobutyloxy)cyclopent-2-en-1-one
• 英文别名: 2-ethyl-3-isobutoxycyclopent-2-enone；2-Ethyl-3-(2-methylpropoxy)cyclopent-2-en-1-one
• CAS: 72419-93-3
• 化学式: C₁₁H₁₈O₂
• 分子量: 182.263
• InChiKey: RQBYTUXOIMKMBD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  13
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-ethyl-3-(isobutyloxy)cyclopent-2-en-1-one 在 四丁基氟化铵 、 三苯基膦 、 三氟乙酸 、 lithium diisopropyl amide 、 偶氮二甲酸二乙酯 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 、 甲苯 为溶剂， 反应 12.75h， 生成 4-chloro-N-(3-((3-ethyl-4-isobutoxy-2-oxocyclopent-3-en-1-yl)methyl)phenethyl)benzenesulfonamide
  参考文献：
  名称：

  Cyclopentane-1,3-dione: A Novel Isostere for the Carboxylic Acid Functional Group. Application to the Design of Potent Thromboxane (A2) Receptor Antagonists

  摘要：

  Cyclopentane-1,3-diones are known to exhibit pK(a) values typically in the range of carboxylic acids. To explore the potential of the cyclopentane-1,3-dione unit as a carboxylic acid isostere, the physical chemical properties of representative congeners were examined and compared with similar derivatives bearing carboxylic acid or tetrazole residues. These studies suggest that cyclopentane-1,3-diones may effectively substitute for the carboxylic acid functional group. To demonstrate the use of the cyclopentane-1,3-dione isostere in drug design, derivatives of a known thromboxane A(2) prostanoid (TP) receptor antagonist, 3-(3-(2-(4-chlorophenylsulfonamido)ethyl)phenyl)propanoic acid (12), were synthesized and evaluated in both functional and radioligand-binding assays. A series of mono- and disubstituted cyclopentane-1,3-dione derivatives (41-45) were identified that exhibit nanomolar IC50 and K-d values similar to 12. Collectively, these studies demonstrate that the cyclopentane-1,3-dione moiety comprises a novel isostere of the carboxylic acid functional group. Given the combination of the relatively strong acidity, tunable lipophilicity, and versatility of the structure, the cyclopentane-1,3-dione moiety may constitute a valuable addition to the palette of carboxylic acid isosteres.

  DOI：

  10.1021/jm200980u
• 作为产物：
  描述：

  1,3-环戊二酮 在 二氢吡啶 、 对甲苯磺酸 、 L-脯氨酸 作用下， 以 二氯甲烷 、 苯 为溶剂， 反应 18.0h， 生成 2-ethyl-3-(isobutyloxy)cyclopent-2-en-1-one
  参考文献：
  名称：

  Cyclopentane-1,3-dione: A Novel Isostere for the Carboxylic Acid Functional Group. Application to the Design of Potent Thromboxane (A2) Receptor Antagonists

  摘要：

  Cyclopentane-1,3-diones are known to exhibit pK(a) values typically in the range of carboxylic acids. To explore the potential of the cyclopentane-1,3-dione unit as a carboxylic acid isostere, the physical chemical properties of representative congeners were examined and compared with similar derivatives bearing carboxylic acid or tetrazole residues. These studies suggest that cyclopentane-1,3-diones may effectively substitute for the carboxylic acid functional group. To demonstrate the use of the cyclopentane-1,3-dione isostere in drug design, derivatives of a known thromboxane A(2) prostanoid (TP) receptor antagonist, 3-(3-(2-(4-chlorophenylsulfonamido)ethyl)phenyl)propanoic acid (12), were synthesized and evaluated in both functional and radioligand-binding assays. A series of mono- and disubstituted cyclopentane-1,3-dione derivatives (41-45) were identified that exhibit nanomolar IC50 and K-d values similar to 12. Collectively, these studies demonstrate that the cyclopentane-1,3-dione moiety comprises a novel isostere of the carboxylic acid functional group. Given the combination of the relatively strong acidity, tunable lipophilicity, and versatility of the structure, the cyclopentane-1,3-dione moiety may constitute a valuable addition to the palette of carboxylic acid isosteres.

  DOI：

  10.1021/jm200980u

文献信息

• Total Synthesis with a Chirogenic Opening Move Demonstrated on Steroids with Estrane or 18a-Homoestrane Skeleton
  作者：Gerhard Quinkert、Michael Del Grosso、Astrid Döring、Wolfgang Döring、Ralf I. Schenkel、Markus Bauch、Gernot T. Dambacher、Jan W. Bats、Gottfried Zimmermann、Gerd Dürner

  DOI：10.1002/hlca.19950780524

  日期：1995.8.9

  A concept of first choice for the synthesis of the title compounds had been proposed by Dane in the late 1930s. It was soon turned down, because the opening move–a chirogenic Diels-Alder reaction – did not work. With Lewis acids as mediators, however, a successful start has been achieved now. With Ti complexes of chelating ligands (Seebach's TADDOLs (= α,α,α′,α′-tetraaryl-1,3-dioxolane-4,5-dimethanols))

  Dane在1930年代后期提出了合成标题化合物的首选方法。很快就被拒绝了，因为开场动作–致色Diels - Alder反应–无效。但是，以路易斯酸为介质，现在已经取得了成功的开始。使用螯合配体的Ti络合物（Seebach 's TADDOLs（=α，α，α'，α'-四芳基-1,3-二氧戊环-4,5-二甲醇）），确实发生了所需加合物的对映选择性形成。已经完成了2和3a的有效总合成。