methyl (2S,3R,4R)-3,5-dihydroxy-2,4-dimethylpentanoate

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羟基酸及其衍生物
• 英文名称: methyl (2S,3R,4R)-3,5-dihydroxy-2,4-dimethylpentanoate
• 化学式: C₈H₁₆O₄
• 分子量: 176.213
• InChiKey: FWQKUDPJTJMZAC-DSYKOEDSSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.1
• 重原子数：
  12
• 可旋转键数：
  5
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.88
• 拓扑面积：
  66.8
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  methyl (2S,3R,4R)-3,5-dihydroxy-2,4-dimethylpentanoate 、 丙酮 在 4-甲基苯磺酸吡啶 作用下， 以 苯 为溶剂， 反应 2.0h， 生成 (2SR,3RS,4RS)-methyl 3,5-O-isopropylidene-2,4-dimethyl-3,5-dihydroxypentanoate
  参考文献：
  名称：

  Stereoselective total synthesis of (.+-.)-invictolide. An efficient preparation of a trisubstituted .delta.-lactone from aldol precursors

  摘要：

  The stereoselective total synthesis of (+/-)-invictolide (1), a component of the queen recognition pheromone of Solenopsis invicta, is described. The TiCl4-mediated addition of silyl ketene thioacetal 8 to (+/-)-3-(benzyloxy)-2-methylpropionaldehyde afforded exclusively thioester 10, in 65% yield, which was straightforwardly converted to diol 5 (ca. 31% yield). Diol 5 was also prepared after LiAlH4 reduction of the major aldol formed in the condensation between the lithium enolate of 2,6-di-tert-butyl-4-methylphenyl propanoate and (+/-)-2-methylvaleraldehyde (ca.50% overall yield). Intramolecular alkylation (t-BuOK-THF) of 6 or 7 gave a 40:60 mixture of (+/-)-1 and its C(3) epimer. Catalytic hydrogenation of unsaturated lactone 17 afforded (+/-)-1 in 80% yield.

  DOI：

  10.1021/jo00054a014
• 作为产物：
  描述：

  S-tert-butyl (2R,3S,4S)-3-hydroxy-2,4-dimethyl-5-phenylmethoxypentanethioate 在 palladium on activated charcoal 甲酸 、 mercury(II) diacetate 、 氢气 作用下， 以 乙醇 为溶剂， 25.0 ℃ 、405.3 kPa 条件下， 反应 6.0h， 生成 methyl (2S,3R,4R)-3,5-dihydroxy-2,4-dimethylpentanoate
  参考文献：
  名称：

  Stereoselective total synthesis of (.+-.)-invictolide. An efficient preparation of a trisubstituted .delta.-lactone from aldol precursors

  摘要：

  The stereoselective total synthesis of (+/-)-invictolide (1), a component of the queen recognition pheromone of Solenopsis invicta, is described. The TiCl4-mediated addition of silyl ketene thioacetal 8 to (+/-)-3-(benzyloxy)-2-methylpropionaldehyde afforded exclusively thioester 10, in 65% yield, which was straightforwardly converted to diol 5 (ca. 31% yield). Diol 5 was also prepared after LiAlH4 reduction of the major aldol formed in the condensation between the lithium enolate of 2,6-di-tert-butyl-4-methylphenyl propanoate and (+/-)-2-methylvaleraldehyde (ca.50% overall yield). Intramolecular alkylation (t-BuOK-THF) of 6 or 7 gave a 40:60 mixture of (+/-)-1 and its C(3) epimer. Catalytic hydrogenation of unsaturated lactone 17 afforded (+/-)-1 in 80% yield.

  DOI：

  10.1021/jo00054a014

文献信息

• Stereoselective total synthesis of (.+-.)-invictolide. An efficient preparation of a trisubstituted .delta.-lactone from aldol precursors
  作者：Ronaldo Aloise Pilli、Maria Marcia Murta

  DOI：10.1021/jo00054a014

  日期：1993.1

  The stereoselective total synthesis of (+/-)-invictolide (1), a component of the queen recognition pheromone of Solenopsis invicta, is described. The TiCl4-mediated addition of silyl ketene thioacetal 8 to (+/-)-3-(benzyloxy)-2-methylpropionaldehyde afforded exclusively thioester 10, in 65% yield, which was straightforwardly converted to diol 5 (ca. 31% yield). Diol 5 was also prepared after LiAlH4 reduction of the major aldol formed in the condensation between the lithium enolate of 2,6-di-tert-butyl-4-methylphenyl propanoate and (+/-)-2-methylvaleraldehyde (ca.50% overall yield). Intramolecular alkylation (t-BuOK-THF) of 6 or 7 gave a 40:60 mixture of (+/-)-1 and its C(3) epimer. Catalytic hydrogenation of unsaturated lactone 17 afforded (+/-)-1 in 80% yield.