ethyl 2-(1-methylethyl)but-2-enoate | 856183-33-0

• 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 2-(1-methylethyl)but-2-enoate
• 英文别名: α-Isopropyl-crotonsaeureethylester；Ethyl 2-propan-2-ylbut-2-enoate；ethyl 2-propan-2-ylbut-2-enoate
• CAS: 856183-33-0
• 化学式: C₉H₁₆O₂
• 分子量: 156.225
• InChiKey: YFDXQUZIAWYOTA-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  11
• 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：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  ethyl 2-(1-methylethyl)but-2-enoate 在 甲基磺酰胺 、 AD-mix-β 、 氢氧化钾 作用下， 以 水 、 叔丁醇 、 乙醇 为溶剂， 反应 78.0h， 生成 [2S,3S,(-)]-2,3-二羟基-2-异丙基丁酸 、 (+)-threo-2.3-dihydroxy-2-isopropyl-butyric acid 、 (2R,3S)-2,3-dihydroxy-2-(1-methylethyl)butyric acid 、 绿花倒提壶酸
  参考文献：
  名称：

  Absolute Configuration and Synthesis of β- and δ-Lactones Present in the Pheromone System of the Giant White Butterfly Idea leuconoe

  摘要：

  Males of the giant white butterfly Idea leuconoe release a complex mixture of compounds during courtship. Besides alkaloids, aromatics, terpenoids and hydrocarbons, several lactones have been identified in the pheromone bouquet. Two simple stereoselective methods to create the lactones in good enantiomeric excesses have been developed. The generation of the stereocenters of the beta-lactones 1a and 1b is based on a controlled C-C coupling by a Horner-Wadsworth-Emmons approach, followed by asymmetric dihydroxylation, whereas the synthesis of the delta-lactone 3b uses an enantioselective hydrogenation of a dioxoalkanoate precursor. The absolute configurations of the natural lactones 1a, 1b and 3b were determined by gas chromatography on a chiral stationary phase. Both 1a and 1b are of (S,S) configuration, suggesting their biosynthetic origin from (-)-viridifloric acid (7a) or (-)norviridifloric acid (7b), respectively. In contrast, natural 3b is a mixture of all enantiomers, in which the (5S,7S) enantiomer dominates.

  DOI：

  10.1002/1099-0690(200211)2002:22<3884::aid-ejoc3884>3.0.co;2-4
• 作为产物：
  描述：

  ethyl 2-ethyl-3-methyl-2-(phenylselanyl)butyrate 在 双氧水 、 溶剂黄146 作用下， 以 四氢呋喃 为溶剂， 反应 0.5h， 生成 ethyl 2-(1-methylethyl)but-2-enoate
  参考文献：
  名称：

  萘锂诱导的还原硒化过程从相应的α,α-二烷基-α-氰基乙酸酯高效制备α,α-二烷基-α-(苯基硒基)乙酸酯和α,β-不饱和酯

  摘要：

  一系列 α,α-二烷基-α-(苯基硒基)乙酸盐已通过使用萘锂诱导的还原性 α-亚硒基化作为关键操作，从容易获得的α,α-二烷基-α-氰基乙酸盐中非常有效地合成。此外，在用过氧化氢和乙酸的一锅法处理中，由此原位产生的二硒酸酯可以进一步转化为相应的α，β-不饱和酯，产率中等至高。在某些情况下，C=C 键的形成是高度区域和/或非对映选择性的。

  DOI：

  10.1055/s-2007-990884

文献信息

• Bogatskii,A.V. et al., Journal of Organic Chemistry USSR (English Translation), 1967, vol. 3, # 8, p. 1338 - 1342
  作者：Bogatskii,A.V. et al.

  DOI：——

  日期：——
• Efficient Preparation of α,α-Dialkyl-α-(phenylselanyl)acetates and α,β-Unsaturated Esters from the Corresponding α,α-Dialkyl-α-cyanoacetates by a Lithium Naphthalenide Induced Reductive Selenenylation Process
  作者：Jia-Liang Zhu、Yen-Chun Ko

  DOI：10.1055/s-2007-990884

  日期：2007.12

  array of α,α-dialkyl-α-(phenylselanyl)acetates has been synthesized very efficiently from readily available a,a-dialkyl-a-cyanoacetates, by use of lithium naphthalenide induced reductive α-selenenylation as a key operation. Moreover, the selanyl esters thus generated in situ could be converted further, in a one-pot treatment with hydrogen peroxide and acetic acid, into the corresponding α,β-unsaturated

  一系列 α,α-二烷基-α-(苯基硒基)乙酸盐已通过使用萘锂诱导的还原性 α-亚硒基化作为关键操作，从容易获得的α,α-二烷基-α-氰基乙酸盐中非常有效地合成。此外，在用过氧化氢和乙酸的一锅法处理中，由此原位产生的二硒酸酯可以进一步转化为相应的α，β-不饱和酯，产率中等至高。在某些情况下，C=C 键的形成是高度区域和/或非对映选择性的。
• Absolute Configuration and Synthesis of β- and δ-Lactones Present in the Pheromone System of the Giant White Butterfly Idea leuconoe
  作者：Katja Stritzke、Stefan Schulz、Ritsuo Nishida

  DOI：10.1002/1099-0690(200211)2002:22<3884::aid-ejoc3884>3.0.co;2-4

  日期：2002.11

  Males of the giant white butterfly Idea leuconoe release a complex mixture of compounds during courtship. Besides alkaloids, aromatics, terpenoids and hydrocarbons, several lactones have been identified in the pheromone bouquet. Two simple stereoselective methods to create the lactones in good enantiomeric excesses have been developed. The generation of the stereocenters of the beta-lactones 1a and 1b is based on a controlled C-C coupling by a Horner-Wadsworth-Emmons approach, followed by asymmetric dihydroxylation, whereas the synthesis of the delta-lactone 3b uses an enantioselective hydrogenation of a dioxoalkanoate precursor. The absolute configurations of the natural lactones 1a, 1b and 3b were determined by gas chromatography on a chiral stationary phase. Both 1a and 1b are of (S,S) configuration, suggesting their biosynthetic origin from (-)-viridifloric acid (7a) or (-)norviridifloric acid (7b), respectively. In contrast, natural 3b is a mixture of all enantiomers, in which the (5S,7S) enantiomer dominates.