(2E)-3-Methyl-2-heptenoic acid | 99799-92-5

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: (2E)-3-Methyl-2-heptenoic acid
• 英文别名: (E)-3-methyl-3-heptenoic acid；3-Methyl-3E-heptenoic acid；(E)-3-methylhept-3-enoic acid
• CAS: 99799-92-5
• 化学式: C₈H₁₄O₂
• 分子量: 142.198
• InChiKey: MXEPBDTXDZEWDM-FNORWQNLSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  10
• 可旋转键数：
  4
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.62
• 拓扑面积：
  37.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  Ethyl 3-hydroxy-3-methylheptanoate 在 吡啶 、 氢氧化钾 、 氯化亚砜 作用下， 以 乙醇 为溶剂， 反应 5.0h， 生成 (2E)-3-Methyl-2-heptenoic acid
  参考文献：
  名称：

  Identification of sex pheromones from cowpea weevil,Callosobruchus maculatus, and related studies withC. analis (coleoptera: Bruchidae)

  摘要：

  Female cowpea weevils, Callosobruchus maculatus, produce a sex pheromone that elicits orientation and sexual behavior in males. Bioassay-directed isolation of the sex pheromone was conducted and compounds in the active fraction were identified and synthesized. Volatiles were collected from individual virgin females by adsorption on filter paper discs and hexane extraction. A bioassay was used in which the locomotory response of single males in glass vials was recorded upon exposure to treatments or controls. Crude extracts were subjected to silica gel column chromatography with solvents of increasing polarity; all activity eluted with methanol. Activity in the highly polar methanol fraction suggested a carboxylic acid or a compound with multiple polar functionality. Acid-base partitioning of the crude extract isolated all activity in the acid fraction, confirming that the pheromone was a carboxylic acid. The acid fraction was further fractionated by preparative GC with a Carbowax column. The most active GC fraction contained the following five 8-carbon acids identified by GC-MS and comparison with synthetic candidates: 3-methyleneheptanoic acid, (Z)-3-methyl-3-heptenoic acid, (E)-3-methyl-3-heptenoic acid, (Z)-3-methyl-2-heptenoic acid, and (E)-3-methyl-2-heptenoic acid. Each of the synthetic acids was active individually for males, and combinations of two or more of the acid pheromones had an additive effect. Upwind flight responses to natural and synthetic pheromones were observed in a flight tunnel. (Z)-3-Methyl-2-heptenoic acid was previously identified as the sex pheromone for the related C. analis, but this and the other four acid pheromones from C. maculatus were inactive for male C. analis. There was no cross-attraction between C. maculatus and C. analis in reciprocal studies using extracted volatiles from females of both species, GCMS analysis of C. analis female volatiles failed to detect any of the C. maculatus compounds but did find an unidentified C-8 acid with a GC retention time different from any of the C. maculatus pheromones.

  DOI：

  10.1007/bf02029543

文献信息

• Efficient and Stereo-Selective Syntheses of Three Stereoisomers of the Sex Pheromone of the Cowpea Weevil,<i>Callosobruchus maculatus</i>
  作者：Arata YAJIMA、Masamichi YAMAMOTO、Tomoo NUKADA、Goro YABUTA

  DOI：10.1271/bbb.70309

  日期：2007.11.23

  An efficient and stereoselective synthesis of three stereoisomers of the sex pheromone of the cowpea weevil, Callosobruchus maculatus, is reported.

  报告了豇豆象鼻虫（Callosobruchus maculatus）性信息素三种立体异构体的高效立体选择性合成。
• STEVIOL GLYCOSIDE SOLUBILITY ENHANCERS
  申请人：CARGILL, INCORPORATED

  公开号：US20190223481A1

  公开（公告）日：2019-07-25

  A solubilized steviol glycoside composition including one or more steviol glycosides and one or more steviol glycoside solubility enhancers can be used as a sweetener composition to sweeten other compositions (sweetenable compositions) such as foods, beverages, medicines, oral hygiene compositions, pharmaceuticals, nutraceuticals, and the like.
• Identification of sex pheromones from cowpea weevil,Callosobruchus maculatus, and related studies withC. analis (coleoptera: Bruchidae)
  作者：Thomas W. Phillips、Joel K. Phillips、Francis X. Webster、Rong Tang、Wendell E. Burkholder

  DOI：10.1007/bf02029543

  日期：1996.12

  Female cowpea weevils, Callosobruchus maculatus, produce a sex pheromone that elicits orientation and sexual behavior in males. Bioassay-directed isolation of the sex pheromone was conducted and compounds in the active fraction were identified and synthesized. Volatiles were collected from individual virgin females by adsorption on filter paper discs and hexane extraction. A bioassay was used in which the locomotory response of single males in glass vials was recorded upon exposure to treatments or controls. Crude extracts were subjected to silica gel column chromatography with solvents of increasing polarity; all activity eluted with methanol. Activity in the highly polar methanol fraction suggested a carboxylic acid or a compound with multiple polar functionality. Acid-base partitioning of the crude extract isolated all activity in the acid fraction, confirming that the pheromone was a carboxylic acid. The acid fraction was further fractionated by preparative GC with a Carbowax column. The most active GC fraction contained the following five 8-carbon acids identified by GC-MS and comparison with synthetic candidates: 3-methyleneheptanoic acid, (Z)-3-methyl-3-heptenoic acid, (E)-3-methyl-3-heptenoic acid, (Z)-3-methyl-2-heptenoic acid, and (E)-3-methyl-2-heptenoic acid. Each of the synthetic acids was active individually for males, and combinations of two or more of the acid pheromones had an additive effect. Upwind flight responses to natural and synthetic pheromones were observed in a flight tunnel. (Z)-3-Methyl-2-heptenoic acid was previously identified as the sex pheromone for the related C. analis, but this and the other four acid pheromones from C. maculatus were inactive for male C. analis. There was no cross-attraction between C. maculatus and C. analis in reciprocal studies using extracted volatiles from females of both species, GCMS analysis of C. analis female volatiles failed to detect any of the C. maculatus compounds but did find an unidentified C-8 acid with a GC retention time different from any of the C. maculatus pheromones.