Ethyl-4,4-dimethyl-3-mercaptopent-2-enoate | 89745-57-3

• 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: Ethyl-4,4-dimethyl-3-mercaptopent-2-enoate
• 英文别名: ethyl (Z)-4,4-dimethyl-3-sulfanylpent-2-enoate
• CAS: 89745-57-3
• 化学式: C₉H₁₆O₂S
• 分子量: 188.291
• InChiKey: YFBONOVAEQBLEW-SREVYHEPSA-N

物化性质

• 沸点：
  242.7±32.0 °C(Predicted)
• 密度：
  1.001±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  12
• 可旋转键数：
  4
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  27.3
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  Ethyl-4,4-dimethyl-3-mercaptopent-2-enoate 在 重水 作用下， 以 氘代氯仿 为溶剂， 反应 2.5h， 生成
  参考文献：
  名称：

  Determination of tautomeric phenotypes of β-thioxo esters and characterization of the tautomeric enethiolic constituents by means of13C NMR spectroscopy

  摘要：

  AbstractThe 13C NMR spectra of 28 enethiolizable β‐thioxo esters and 6 enethiolizable β‐thioxo thioloesters have been recorded in order to establish the tautomeric phenotypes of these compounds. All compounds investigated are essentially enethiolic. The carbonyl‐conjugated (Z)‐enethiol form is the exclusive or predominant tautomer of open‐chain β‐thioxo esters and thioloesters, thioacylmalonates and medium‐sized 2‐alkoxycarbonylcycloalkanethiones. The carbonyl‐conjugated (E)‐enethiol form is identifiable for open‐chain α‐unsubstituted β‐thioxo esters and thioloesters, and abundant for open‐chain α‐substituted β‐thioxo esters. Non‐conjugated enethiol forms [i.e. (Z)‐ and (E)‐isomeric β,γ‐unsaturated β‐mercapto esters] are abundant tautomeric constituents of ω‐substituted and higher 2‐alkoxycarbonylcycloalkanethiones. The chemical shifts of the carbon atoms directly involved in the tautomeric change have been rationalized in terms of substituent screening contributions. Deuterium isotope effects on the central carbon atoms of selected deuterio‐enethiolic compounds have been measured in order to depict the ester group rotamerism in CO‐conjugated (Z)‐enethiols. The abundance of the CO‐conjugated (E)‐enethiols, as well as the preferred population of the non‐conjugated (Z)‐enethiol form relative to the non‐conjugated (E)‐enethiol form, is rationalized in terms of the occurrence of a no‐bond interaction between the lone‐pair electrons of the enethiolic sulphur atom and the ‘chelating’ methylene hydrogen atoms of cis‐alkyl groups.

  DOI：

  10.1002/mrc.1270220105
• 作为产物：
  描述：

  特戊酰基乙酸乙酯 在 盐酸 、 硫化氢 作用下， 以 乙腈 为溶剂， 生成 Ethyl-4,4-dimethyl-3-mercaptopent-2-enoate
  参考文献：
  名称：

  取代基对开链β-硫代酮酸酯的制备和互变异构的影响：NMR和IR光谱测定结构

  摘要：

  特别是关于β-硫代酮酸酯的合成，已经在各种条件下研究了36种不同取代的β-酮酸酯与H 2 S的酸催化反应，以确定取代基对反应过程的影响。通过该反应也可以高收率获得宝石-二硫醇。用烷基卤化物处理β-硫代酮酸酯的T1（I）-盐仅导致S-烷基化。证明了通过绕CC双键旋转，S-烷基化的α，β-不饱和β-巯基酯的缓慢的顺反异构体。硫代乙硫代乙酸乙酯是通过硫代乙酸乙酯的自缩合制备的。

  DOI：

  10.1016/0040-4020(72)88125-0

文献信息

• 2,2-Dimethylpropanethial: a long-lived aliphatic thioaldehyde
  作者：E. Vedejs、D. A. Perry

  DOI：10.1021/ja00344a061

  日期：1983.3
• Thiophene chemistry—XIX
  作者：B. Hedegaard、J.Z. Mortensen、S.-O. Lawesson

  DOI：10.1016/s0040-4020(01)98246-8

  日期：1971.1
• KOCHHAR, K. S.;COTTRELL, D. A.;PINNICK, H. W., TETRAHEDRON LETT., 1983, 24, N 13, 1323-1326
  作者：KOCHHAR, K. S.、COTTRELL, D. A.、PINNICK, H. W.

  DOI：——

  日期：——
• The influence of substituents on preparation and tautomerism of open-chain β-thioketoesters
  作者：F. Duus

  DOI：10.1016/0040-4020(72)88125-0

  日期：1972.1

  the synthesis of β-thioketoesters, the acid catalysed reactions of 36 differently substituted β-keto esters with H2S have been studied under various conditions in order to determine the influence of the substituents on reaction course. gem-Dithiols may also be obtained in good yields by this reaction. Treatment of T1(I)-salts of β-thioketo esters with alkyl halides results exclusively in S-alkylation

  特别是关于β-硫代酮酸酯的合成，已经在各种条件下研究了36种不同取代的β-酮酸酯与H 2 S的酸催化反应，以确定取代基对反应过程的影响。通过该反应也可以高收率获得宝石-二硫醇。用烷基卤化物处理β-硫代酮酸酯的T1（I）-盐仅导致S-烷基化。证明了通过绕CC双键旋转，S-烷基化的α，β-不饱和β-巯基酯的缓慢的顺反异构体。硫代乙硫代乙酸乙酯是通过硫代乙酸乙酯的自缩合制备的。
• Determination of tautomeric phenotypes of β-thioxo esters and characterization of the tautomeric enethiolic constituents by means of13C NMR spectroscopy
  作者：F. Duus、P. E. Hansen

  DOI：10.1002/mrc.1270220105

  日期：1984.1

  AbstractThe 13C NMR spectra of 28 enethiolizable β‐thioxo esters and 6 enethiolizable β‐thioxo thioloesters have been recorded in order to establish the tautomeric phenotypes of these compounds. All compounds investigated are essentially enethiolic. The carbonyl‐conjugated (Z)‐enethiol form is the exclusive or predominant tautomer of open‐chain β‐thioxo esters and thioloesters, thioacylmalonates and medium‐sized 2‐alkoxycarbonylcycloalkanethiones. The carbonyl‐conjugated (E)‐enethiol form is identifiable for open‐chain α‐unsubstituted β‐thioxo esters and thioloesters, and abundant for open‐chain α‐substituted β‐thioxo esters. Non‐conjugated enethiol forms [i.e. (Z)‐ and (E)‐isomeric β,γ‐unsaturated β‐mercapto esters] are abundant tautomeric constituents of ω‐substituted and higher 2‐alkoxycarbonylcycloalkanethiones. The chemical shifts of the carbon atoms directly involved in the tautomeric change have been rationalized in terms of substituent screening contributions. Deuterium isotope effects on the central carbon atoms of selected deuterio‐enethiolic compounds have been measured in order to depict the ester group rotamerism in CO‐conjugated (Z)‐enethiols. The abundance of the CO‐conjugated (E)‐enethiols, as well as the preferred population of the non‐conjugated (Z)‐enethiol form relative to the non‐conjugated (E)‐enethiol form, is rationalized in terms of the occurrence of a no‐bond interaction between the lone‐pair electrons of the enethiolic sulphur atom and the ‘chelating’ methylene hydrogen atoms of cis‐alkyl groups.