diethyl 2-methyl-2-(thiophen-3-ylmethyl)malonate | 26415-27-0

• 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: diethyl 2-methyl-2-(thiophen-3-ylmethyl)malonate
• 英文别名: Diethyl 2-methyl-2-(thiophen-3-ylmethyl)propanedioate；diethyl 2-methyl-2-(thiophen-3-ylmethyl)propanedioate
• CAS: 26415-27-0
• 化学式: C₁₃H₁₈O₄S
• mdl: MFCD25940885
• 分子量: 270.35
• InChiKey: PPIXUAYVMCJLBN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  18
• 可旋转键数：
  8
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.538
• 拓扑面积：
  80.8
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  diethyl 2-methyl-2-(thiophen-3-ylmethyl)malonate 在 氢氧化钾 、 lithium aluminium tetrahydride 作用下， 以 乙醚 、 乙醇 为溶剂， 反应 26.0h， 生成 2-methyl-3-thiophen-3-ylpropanol
  参考文献：
  名称：

  Sex Pheromone of the Pine Sawfly, Macrodiprion nemoralis. Stereoselective Synthesis of the Sixteen Stereoisomers of 3,7,9-Trimethyl-2-tridecyl Acetate.

  摘要：

  The sixteen stereoisomers of 3,7,9-trimethyl-2-tridecyl acetate (5Ac) were prepared individually, each in over 99.5% stereochemical purity. The syntheses were based on the ring opening of a pure enantiomer of cis-3,4-dimethyl-gamma-butyrolactone using a pure stereoisomer of 1-lithio-2,4-dimethyloctane, the two stereogenic centres of which were introduced with high selectivity by alkylations of the amide enolates from the appropriate enantiomers of pseudoephedrine. (2S,3R,7R,9S)-3,7,9-Trimethyl-2-tridecyl acetate (SRRS-5Ac) has recently been found to be the major component of the female sex pheromone of Macrodiprion nemoralis (Hymenoptera: Diprionidae). A synthetic method for the preparation of a sixteen isomer mixture of 5Ac is also presented. This mixture has been found to be biologically active in field tests.

  DOI：

  10.3891/acta.chem.scand.53-0620
• 作为产物：
  描述：

  3-噻吩甲醇 在 4-二甲氨基吡啶 、 1,1'-双(二苯基膦)二茂铁 、 bis(1,5-cyclooctadiene)nickel (0) 、 三乙胺 作用下， 以 甲苯 为溶剂， 反应 35.0h， 生成 diethyl 2-methyl-2-(thiophen-3-ylmethyl)malonate
  参考文献：
  名称：

  以丙二酸酯为软碳亲核试剂的镍催化苄基酯取代苄基酯。

  摘要：

  与用硬碳亲核试剂相比，用软碳亲核试剂对苯甲醇衍生物进行镍催化的苄基取代极为罕见。我们已经实现了丙二酸酯作为软碳亲核试剂的镍催化苄基酯的苄基取代。2,3,4,5,6-五氟苯甲酸苄酯和仲苄酯以及各种丙二酸酯衍生物在镍催化的反应中具有良好的耐受性，以46-86％的收率提供了相应的烷基化产物（34个实例）。此外，我们提出了一种可能的反应机理，将经由η经历1 -和η 3个-benzylnickel中间体。

  DOI：

  10.1021/acs.orglett.9b03475

文献信息

• Nickel-Catalyzed Benzylic Substitution of Benzyl Esters with Malonates as a Soft Carbon Nucleophile
  作者：Hiroaki Tsuji、Keisuke Hashimoto、Motoi Kawatsura

  DOI：10.1021/acs.orglett.9b03475

  日期：2019.11.1

  The nickel-catalyzed benzylic substitution of benzyl alcohol derivatives with a soft carbon nucleophile is extremely rare compared to that with a hard carbon nucleophile. We have achieved the nickel-catalyzed benzylic substitution of benzyl esters with malonates as a soft carbon nucleophile. Primary and secondary benzyl 2,3,4,5,6-pentafluorobenzoates as well as a wide variety of malonate derivatives

  与用硬碳亲核试剂相比，用软碳亲核试剂对苯甲醇衍生物进行镍催化的苄基取代极为罕见。我们已经实现了丙二酸酯作为软碳亲核试剂的镍催化苄基酯的苄基取代。2,3,4,5,6-五氟苯甲酸苄酯和仲苄酯以及各种丙二酸酯衍生物在镍催化的反应中具有良好的耐受性，以46-86％的收率提供了相应的烷基化产物（34个实例）。此外，我们提出了一种可能的反应机理，将经由η经历1 -和η 3个-benzylnickel中间体。
• Sex Pheromone of the Pine Sawfly, Macrodiprion nemoralis. Stereoselective Synthesis of the Sixteen Stereoisomers of 3,7,9-Trimethyl-2-tridecyl Acetate.
  作者：Staffan Karlsson、Erik Hedenström、Luis Lezama、María I. Arriortua、Margareta Björkman、Benita H. Forngren、Tobias Forngren、Per Hartvig、Karin Markides、Ulrika Yngve、Mattias Ögren

  DOI：10.3891/acta.chem.scand.53-0620

  日期：——

  The sixteen stereoisomers of 3,7,9-trimethyl-2-tridecyl acetate (5Ac) were prepared individually, each in over 99.5% stereochemical purity. The syntheses were based on the ring opening of a pure enantiomer of cis-3,4-dimethyl-gamma-butyrolactone using a pure stereoisomer of 1-lithio-2,4-dimethyloctane, the two stereogenic centres of which were introduced with high selectivity by alkylations of the amide enolates from the appropriate enantiomers of pseudoephedrine. (2S,3R,7R,9S)-3,7,9-Trimethyl-2-tridecyl acetate (SRRS-5Ac) has recently been found to be the major component of the female sex pheromone of Macrodiprion nemoralis (Hymenoptera: Diprionidae). A synthetic method for the preparation of a sixteen isomer mixture of 5Ac is also presented. This mixture has been found to be biologically active in field tests.