(2R,4S)-2,4-dimethyloctan-1-ol | 249745-87-7

• 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: (2R,4S)-2,4-dimethyloctan-1-ol
• 英文别名: (2r,4s)-2,4-Dimethyl-1-octanol
• CAS: 249745-87-7
• 化学式: C₁₀H₂₂O
• 分子量: 158.284
• InChiKey: DGPIFVIIBUMGDJ-VHSXEESVSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 重原子数：
  11
• 可旋转键数：
  6
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  20.2
• 氢给体数：
  1
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  (2R,4S)-2,4-dimethyloctan-1-ol 在 氢氧化钾 、 lithium 、 一水合肼 、 三苯基膦 作用下， 以 四氯化碳 、 正己烷 、 二乙二醇 为溶剂， 反应 7.42h， 生成 (2R,3R,7S,9S)-3,7,9-Trimethyl-tridecan-2-ol
  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：

  (2R,4S)-N-[(1S,2S)-2-hydroxy-1-methyl-2-phenylethyl]-N,2,4-trimethyloctanamide 在 四氢吡咯 、 正丁基锂 、 硼烷四氢呋喃络合物 作用下， 以2.0 g的产率得到(2R,4S)-2,4-dimethyloctan-1-ol
  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

文献信息

• Efficient and Selective Synthesis of (<i>S</i>,<i>R</i>,<i>R</i>,<i>S</i>,<i>R</i>,<i>S</i>)-4,6,8,10,16,18-Hexamethyl- docosane via Zr-Catalyzed Asymmetric Carboalumination of Alkenes (ZACA Reaction)
  作者：Gangguo Zhu、Bo Liang、Ei-ichi Negishi

  DOI：10.1021/ol703056u

  日期：2008.3.1

  (S,R,R,S,R,S)-4,6,8,10,16,18-Hexamethyldocosane (1) was synthesized in 11% yield in 11 steps in the longest linear sequence from > or =98% pure (S)-beta-citronellal and 6 additional steps for the preparation of 11 in 23% yield from propene. Five of the six asymmetric carbon centers were generated catalytically and stereoselectively by the ZACA reaction (5 times), one lipase-catalyzed acetylation, and

  （S，R，R，S，R，S）-4,6,8,10,16,18-六甲基甲基二十二烷（1）以11％的产率按最长线性顺序从11％合成，大于或等于98％纯的（S）-β-香茅醛和6个额外的步骤，以11％的产率从丙烯制备11个。六个不对称碳中心中的五个是通过ZACA反应（5次），一种脂肪酶催化的乙酰化反应和两次色谱操作催化和立体选择性生成的。