erythro-5-hydroxy-4,6-dimethyl-6-hepten-3-one | 62338-59-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: erythro-5-hydroxy-4,6-dimethyl-6-hepten-3-one
• 英文别名: (4S,5S)-5-hydroxy-4,6-dimethylhept-6-en-3-one
• CAS: 62338-59-4；78024-18-7；78024-19-8；108211-83-2；108211-84-3；143004-04-0；143004-05-1
• 化学式: C₉H₁₆O₂
• 分子量: 156.225
• InChiKey: GVYRYRHACRAUBG-VXNVDRBHSA-N

物化性质

• 沸点：
  249.5±20.0 °C(Predicted)
• 密度：
  0.933±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 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：
  37.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  丙酸酐 、 erythro-5-hydroxy-4,6-dimethyl-6-hepten-3-one 在 4-二甲氨基吡啶 、 三乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 3.0h， 以88%的产率得到[(3R,4R)-2,4-dimethyl-5-oxohept-1-en-3-yl] propanoate
  参考文献：
  名称：

  Total Synthesis of (-)-Ebelactone A and B

  摘要：

  The beta-lactone enzyme inhibitors (-)-ebelactone A (1) and (-)-ebelactone B (2) have been prepared in 12 steps from diethyl ketone (4 and 3% overall yield, respectively). The synthetic strategy adopted for the ebelactones demonstrates the use of reagent- and substrate-derived stereocontrol and requires the minimal use of protecting groups. The stereocenters at C-2, C-3, C-8, C-10, and C-11 were constructed using boron aldol methodology. An asymmetric syn, aldol addition of diethyl ketone to 2-ethyl/acrolein gave adduct 8 in 86% ee, followed by a diastereoselective syn aldol reaction to give 11. Subsequently, an Ireland-Claisen rearrangement was used to relay 1,2-syn into 1,5-syn relative stereochemistry, as in 12 --> 14. In the anti aldol construction of the C-2-C-3 bond, the use of either a propionate or butyrate thioester enolate allowed for a divergent approach from aldehyde 17 to both (-)-ebelactone A and B. Several novel analogues of ebelactone A and B were also prepared with inverted stereochemistry at C-2, C-3, or C-12.

  DOI：

  10.1021/jo00116a010
• 作为产物：
  描述：

  2-甲基丙烯醛 、 3-戊酮 生成 erythro-5-hydroxy-4,6-dimethyl-6-hepten-3-one
  参考文献：
  名称：

  Total Synthesis of (-)-Ebelactone A and B

  摘要：

  The beta-lactone enzyme inhibitors (-)-ebelactone A (1) and (-)-ebelactone B (2) have been prepared in 12 steps from diethyl ketone (4 and 3% overall yield, respectively). The synthetic strategy adopted for the ebelactones demonstrates the use of reagent- and substrate-derived stereocontrol and requires the minimal use of protecting groups. The stereocenters at C-2, C-3, C-8, C-10, and C-11 were constructed using boron aldol methodology. An asymmetric syn, aldol addition of diethyl ketone to 2-ethyl/acrolein gave adduct 8 in 86% ee, followed by a diastereoselective syn aldol reaction to give 11. Subsequently, an Ireland-Claisen rearrangement was used to relay 1,2-syn into 1,5-syn relative stereochemistry, as in 12 --> 14. In the anti aldol construction of the C-2-C-3 bond, the use of either a propionate or butyrate thioester enolate allowed for a divergent approach from aldehyde 17 to both (-)-ebelactone A and B. Several novel analogues of ebelactone A and B were also prepared with inverted stereochemistry at C-2, C-3, or C-12.

  DOI：

  10.1021/jo00116a010

文献信息

• Stereoselective aldol condensations via boron enolates
  作者：D. A. Evans、J. V. Nelson、E. Vogel、T. R. Taber

  DOI：10.1021/ja00401a031

  日期：1981.6

  carboxylic acid derivatives with dialkylboryl triflates in the presence of a tertiary amine and the subsequent aldol condensations of these boron enolates was conducted. The stereochemistry of the enolates formed from acyclic ketones was found to be dependent on the structure of the ketone, the dialkylboryl triflate, and the tertiary amine. A mechanism for the enolization involving initial coordination of

  在叔胺的存在下，对各种酮和羧酸衍生物与二烷基硼基三氟甲磺酸酯的烯醇化以及这些硼烯醇化物的随后羟醛缩合进行了详细研究。发现由无环酮形成的烯醇化物的立体化学取决于酮、二烷基硼基三氟甲磺酸酯和叔胺的结构。提出了一种涉及硼基三氟甲磺酸酯与酮羰基的初始配位以及随后由胺去质子化的烯醇化机制来解释结果。衍生自这些无环酮的硼烯醇化物以良好的收率与许多醛进行羟醛缩合。无论酮或硼配体的结构如何，在这些无环酮的烯醇几何结构和产物羟醛立体化学之间观察到始终良好的相关性。然而，对于衍生自环己酮的硼烯醇化物，羟醛立体选择性取决于硼配体和溶剂。在这种情况下，在四氢呋喃中使用环戊基己基硼烯醇化物作为溶剂导致缩合中的完全立体控制。虽然简单的酯和酰胺不能用三氟甲磺酸酯试剂进行烯醇化，但硫代丙酸叔丁酯很容易转化为反式烯醇酯。该烯醇化物的羟醛缩合的立体选择性也取决于硼配体和溶剂；同样，这些参数的正确选择允许对冷凝进行全面的立体控
• ERYTHRO-SELECTIVE ALDOL CONDENSATION VIA ENAMINOSILANES
  作者：Wataru Ando、Hidetoshi Tsumaki

  DOI：10.1246/cl.1983.1409

  日期：1983.9.5

  In the presence of BF3·OEt2, enaminosilanes derived from acyclic and cyclic ketones have been shown to undergo erythro selective kinetic aldol condensation.

  在 BF3·OEt2 存在下，衍生自无环和环状酮的烯氨基硅烷已被证明会发生赤型选择性动力学羟醛缩合。
• Total Synthesis of (-)-Ebelactone A and B
  作者：Ian Paterson、Alison N. Hulme

  DOI：10.1021/jo00116a010

  日期：1995.6

  The beta-lactone enzyme inhibitors (-)-ebelactone A (1) and (-)-ebelactone B (2) have been prepared in 12 steps from diethyl ketone (4 and 3% overall yield, respectively). The synthetic strategy adopted for the ebelactones demonstrates the use of reagent- and substrate-derived stereocontrol and requires the minimal use of protecting groups. The stereocenters at C-2, C-3, C-8, C-10, and C-11 were constructed using boron aldol methodology. An asymmetric syn, aldol addition of diethyl ketone to 2-ethyl/acrolein gave adduct 8 in 86% ee, followed by a diastereoselective syn aldol reaction to give 11. Subsequently, an Ireland-Claisen rearrangement was used to relay 1,2-syn into 1,5-syn relative stereochemistry, as in 12 --> 14. In the anti aldol construction of the C-2-C-3 bond, the use of either a propionate or butyrate thioester enolate allowed for a divergent approach from aldehyde 17 to both (-)-ebelactone A and B. Several novel analogues of ebelactone A and B were also prepared with inverted stereochemistry at C-2, C-3, or C-12.