(4S,2R)-4-phenoxypentane-2-ol | 118711-26-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: (4S,2R)-4-phenoxypentane-2-ol
• 英文别名: (2R,4S)-4-phenoxypentan-2-ol
• CAS: 118711-26-5
• 化学式: C₁₁H₁₆O₂
• 分子量: 180.247
• InChiKey: QACLFMNGNFHTBM-ZJUUUORDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  13
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  29.5
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (4S,2R)-4-phenoxypentane-2-ol 在 dirhodium tetraacetate 、 对甲苯磺酰叠氮 、 三乙胺 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 5.0h， 生成 (3S,5R,8S)-3,5-dimethyl-2,6-dioxabicyclo[6.5.0]trideca-1(13),9,11-trien-7-one
  参考文献：
  名称：

  “Chiral Perturbation Factor” Approach Reveals Importance of Entropy Term in Stereocontrol of the 2,4-Pentanediol-Tethered Reaction

  摘要：

  The stereocontrol mechanism of the 2, 4-pentanediol (PD)-tethered reaction was studied in detail using a reaction system consisting of phenyl and rhodium carbenoid moieties. Different tethers were examined to analyze the effects of the methyl groups on the PD tether. Among the reactions with these tethers, the PD tether achieves an unmeasurably high stereoselectivity in a diastereomeric ratio of > 500. Another tether showing a high but measurable stereoselectivity in a ratio of 41 is mostly controlled by the entropy term. To clarify the role of the methyl groups on the chiral tethers, which are the origin of the stereocontrol, the "chiral perturbation factor" is introduced. This parameter is defined as the rate of a chiral reaction relative to that of an achiral reference reaction. By analyzing the temperature dependence of the chiral perturbation factors for different chiral-tethered reactions, high potentials of the PD-tethered reaction in its stereocontrol are concluded to be due to the entropy term.

  DOI：

  10.1021/jo025937s
• 作为产物：
  描述：

  (2R,4R)-pentanediol 、 苯酚 在 bis(2-methoxyethyl) azodicarboxylate 、 三苯基膦 作用下， 以 四氢呋喃 为溶剂， 以84%的产率得到(4S,2R)-4-phenoxypentane-2-ol
  参考文献：
  名称：

  DMEAD：用于Mitsunobu反应的新的偶氮二羧酸二烷基酯

  摘要：

  分两个步骤以65％的产率制备偶氮二羧酸二-2-甲氧基乙酯（DMEAD），为结晶固体。与常规二偶氮偶氮二甲酸二异丙酯（DIAD）一样，在多种醇与亲核试剂的Mitsunobu反应中使用DMEAD可以在足够的立体定向特异性下获得良好的收率。但是，用DMEAD分离产品要比使用DIAD容易得多，因为用DM​​EAD生产的肼具有高度亲水性，并且可以通过简单地萃取到中性水中而完全分离。在通过过滤分离其他副产物三苯基膦氧化物后，有机层的纯化容易以高收率提供高纯度的产物。水层的浓缩产生肼，该肼可再用于制备DMEAD。

  DOI：

  10.1016/j.tet.2009.05.048

文献信息

• Di-2-methoxyethyl Azodicarboxylate (DMEAD): An Inexpensive and Separation-friendly Alternative Reagent for the Mitsunobu Reaction
  作者：Takashi Sugimura、Kazutake Hagiya

  DOI：10.1246/cl.2007.566

  日期：2007.4.5

  Di-2-methoxyethyl azodicarboxylate (DMEAD) was prepared as an alternative of DEAD or DIAD for the Mitsunobu reaction. Removal of the hydrazinedicarboxylate generated from DMEAD becomes much easier owing to the polar and water-soluble property.

  偶氮二甲酸二-2-甲氧基乙酯 (DMEAD) 被制备为用于 Mitsunobu 反应的 DEAD 或 DIAD 的替代品。由于具有极性和水溶性，从 DMEAD 产生的肼二羧酸盐的去除变得更加容易。
• AZODICARBOXYLIC ACID BIS(2-ALKOXYETHYL) ESTER COMPOUND, AND PRODUCTION INTERMEDIATE THEREOF
  申请人：Hagiya Kazutake

  公开号：US20100048881A1

  公开（公告）日：2010-02-25

  Provided is an industrially safe and useful azodicarboxylic acid bis(2-alkoxyethyl) ester compound that is useful for the Mitsunobu reaction in which it is used in combination with a phosphorus compound to carry out a dehydration condensation reaction, and also useful as an oxidizing agent, and a starting material for various synthetic processes. Also provided are a production intermediate of the above-described compound, and methods for producing these compounds. An azodicarboxylic acid bis(2-alkoxyethyl) ester compound represented by formula (1); wherein A represents an alkyl group having 1 to 10 carbon atoms.

  提供了一种在Mitsunobu反应中与磷化合物结合使用进行脱水缩合反应、作为氧化剂以及各种合成过程的起始物质的工业安全和有用的二(2-烷氧乙基)偶氮二甲酸酯化合物。还提供了上述化合物的生产中间体以及生产这些化合物的方法。一种由式(1)表示的二(2-烷氧乙基)偶氮二甲酸酯化合物；其中A表示具有1至10个碳原子的烷基。
• Remote stereocontrol of intramolecular rhodium carbene addition driven by a small and flexible chiral 2,4-pentanediol tether
  作者：Chun Young Im、Takashi Sugimura

  DOI：10.1016/j.tet.2012.03.009

  日期：2012.5

  Intramolecular rhodium carbenoid additions were studied using 2,4-pentanidiol as a chiral tether between a diazo group, a precursor of the carbene, and an aromatic group to be reacted with the carbene. The reaction was designed to perform the addition at a remote position, conserving the original high stereoselectivity appeared at additions near the tether, in addition to high regioselectivity and sufficient reaction efficiency. Substitution on the near reaction sites, the carbene carbon and aromatic group, in the reactant was effective to relegate the reaction site to a remote position. In the present study, two remote reactions, one dealing with C-H insertion and the other classified in Buchner reaction, were found to give sole products in high yields. (C) 2012 Elsevier Ltd. All rights reserved.
• BIS(2-ALKOXYETHYL) AZODICARBOXYLATE ESTER COMPOUND AND INTERMEDIATE FOR PRODUCTION OF THE SAME
  申请人：Toyo Boseki Kabushiki Kaisha

  公开号：EP2112136B1

  公开（公告）日：2012-05-23
• Entropy-Controlled Asymmetric Synthesis. How Differential Activation Entropy Is Induced in Chiral Tethered Reactions
  作者：Takashi Sugimura、Kazutake Hagiya、Yasuhiro Sato、Takahiro Tei、Akira Tai、Tadashi Okuyama

  DOI：10.1021/ol006741m

  日期：2001.1.1

  [GRAPHICS]Kinetic measurements to determine effective molarities of intramolecular reactions using 2,4-pentanediol and related tethers showed that methyl groups on the tether accelerate the major diastereomeric process but decelerate the minor process. The efficient promotion of stereocontrol is suggested to be due to chiral perturbation of the reaction rate through the entropy term, The conformation of the encounter complex of the reagent and reactant moieties was deduced by stereochemical analysis of the intramolecular adducts.