ethyl (4S,5S)-4,5-dihydroxy-5-phenyl-2-pentenoate | 337508-76-6

• 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: ethyl (4S,5S)-4,5-dihydroxy-5-phenyl-2-pentenoate
• 英文别名: ethyl (E,4S,5S)-4,5-dihydroxy-5-phenylpent-2-enoate
• CAS: 337508-76-6
• 化学式: C₁₃H₁₆O₄
• 分子量: 236.268
• InChiKey: UDWOCNHQYQCDLA-SXDPYWSBSA-N

物化性质

• 沸点：
  405.1±45.0 °C(Predicted)
• 密度：
  1.193±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.9
• 重原子数：
  17
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.31
• 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：

  ethyl (4S,5S)-4,5-dihydroxy-5-phenyl-2-pentenoate 在 三苯基膦 吡啶 、 4-二甲氨基吡啶 、 tris(dibenzylideneacetone)dipalladium(0) chloroform complex 、 甲酸 、 三乙胺 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 5.5h， 生成 (2E,5R)-5-羟基-5-苯基-2-戊烯酸乙酯
  参考文献：
  名称：

  An Enantioselective Synthesis of Benzylidene-Protected syn-3,5-Dihydroxy Carboxylate Esters via Osmium, Palladium, and Base Catalysis

  摘要：

  [GRAPHICS]The enantioselective syntheses of several protected syn-3,5-dihydroxy carboxylic esters have been achieved from the corresponding achiral 1,3-dieneoates, The route relies upon an enantio- and regioselective Sharpless dihydroxylation and a palladium-catalyzed reduction to form delta -hydroxy-1-enoates, The resulting delta -hydroxy-1-enoates are subsequently converted into benzylidene-protected 3,5-dihydroxy carboxylic esters in one step, The benzylidene-protected 3,5-dihydroxy carboxylic esters are produced in good overall yields (25% to 51%) and high enantiomeric excesses (80% to >95%).

  DOI：

  10.1021/ol0156188
• 作为产物：
  描述：

  (2E,4e)-5-苯基-2,4-戊二烯酸乙酯 在 甲基磺酰胺 、 potassium carbonate 四氧化锇 、 Hydroquinone 1,4-phthalazinediyl diether 、 potassium hexacyanoferrate(III) 作用下， 以 水 、 叔丁醇 为溶剂， 以79%的产率得到ethyl (4S,5S)-4,5-dihydroxy-5-phenyl-2-pentenoate
  参考文献：
  名称：

  An Enantioselective Synthesis of Benzylidene-Protected syn-3,5-Dihydroxy Carboxylate Esters via Osmium, Palladium, and Base Catalysis

  摘要：

  [GRAPHICS]The enantioselective syntheses of several protected syn-3,5-dihydroxy carboxylic esters have been achieved from the corresponding achiral 1,3-dieneoates, The route relies upon an enantio- and regioselective Sharpless dihydroxylation and a palladium-catalyzed reduction to form delta -hydroxy-1-enoates, The resulting delta -hydroxy-1-enoates are subsequently converted into benzylidene-protected 3,5-dihydroxy carboxylic esters in one step, The benzylidene-protected 3,5-dihydroxy carboxylic esters are produced in good overall yields (25% to 51%) and high enantiomeric excesses (80% to >95%).

  DOI：

  10.1021/ol0156188

文献信息

• Regioselective <i>cis</i>,<i>vic</i>-Dihydroxylation of α,β,γ,δ-Unsaturated Carboxylic Esters: Enhanced γ,δ-Selectivity by Employing Trifluoroethyl or Hexafluoroisopropyl Esters
  作者：Reinhard Brückner、Joachim Schmidt-Leithoff

  DOI：10.1055/s-2006-951473

  日期：2006.9

  The regioselectivity of Sharpless asymmetric dihydroxylation (AD) of α,β,γ,δ-unsaturated carboxylic esters was studied as a function of α-, β-, and δ-substituents and for fluorine-free versus fluorinated esters. The latter showed increased or complete γ,δ-selectivities: the hexafluoroisopropyl ester being superior to the tri­fluoroethyl ester. Olefinations of α,β-unsaturated aldehydes with phosphorus ylide 36 or phosphonate anion 41 provided α,β,γ,δ-unsaturated trifluoroethyl esters, leading inter alia to complete trans selectivity and to 31 with 94% E selectivity, respectively.

  研究了 α、β、γ、δ-不饱和羧酸酯的 Sharpless 不对称二羟基化 (AD) 的区域选择性作为 α-、β- 和 δ- 取代基的函数以及无氟酯与氟化酯的关系。后者表现出增加的或完全的γ,δ-选择性：六氟异丙酯优于三氟乙酯。 α,β-不饱和醛与磷叶立德 36 或膦酸根阴离子 41 的烯化反应提供了 α,β,γ,β-不饱和三氟乙酯，尤其导致完全反式选择性和 31 分别具有 94% E 选择性。
• Remote steric effect on the regioselectivity of Sharpless asymmetric dihydroxylation
  作者：Yan Zhang、George A. O'Doherty

  DOI：10.1016/j.tet.2005.03.119

  日期：2005.6

  Studies on the regioselectivities for the Sharpless asymmetric dillydroxylation (AD) of conjugated dienoates, trienoates, dienones and dienamides are described. Excellent regioselectivities were obtained in straight chain dienoates, all trienoates, ketones damicles. The remote branched iso-propyl and tert-butyl groups of dienoates greatly lowered the normally excellent regiocontrol. This observation is rationalized in terms of substrate conformational changes, and the steric interaction between the branched methyl group of iso-propyl ortertbutyl groups and the ethyl group Oil the (DHQD)(2)PHAL ligand. (c) 2005 Elsevier Ltd. All rights reserved.