ethyl 2,2-difluoro-3-hydroxy-4-phenylbutanoate | 330801-21-3

• 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: ethyl 2,2-difluoro-3-hydroxy-4-phenylbutanoate
• CAS: 330801-21-3
• 化学式: C₁₂H₁₄F₂O₃
• mdl: MFCD17964652
• 分子量: 244.238
• InChiKey: NFMJJWTUONGVGO-UHFFFAOYSA-N

物化性质

• 沸点：
  364.2±42.0 °C(predicted)
• 密度：
  1.217±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  17
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.416
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  ethyl 2,2-difluoro-3-hydroxy-4-phenylbutanoate 在 sodium hydroxide 、 三苯基膦 、 偶氮二甲酸二乙酯 作用下， 以 四氢呋喃 、 水 、 甲苯 为溶剂， 反应 4.5h， 生成 N-(4-methoxyphenyl)-3-benzyl-2,2-difluoropropano-3-lactam
  参考文献：
  名称：

  SmI₂-Mediated Reduction of γ,γ-Difluoro-α,β-enoates with Application to the Synthesis of Functionalized (Z)-Fluoroalkene-Type Dipeptide Isosteres

  摘要：

  A samarium diiodide (SmI2)-mediated reduction of gamma,gamma-difluoro-alpha,beta-enoates (15, 29, and 34) was successfully applied to the synthesis of (Z)-fluoroalkene dipeptide isosteres (23, 30, and 35), which have served as potential dipeptide mimetics. Reduction of the gamma,gamma-difluoro-alpha,beta-enoates by SmI2 proceeded via successive two-electron transfers to form dienolate species which upon kinetically controlled trapping with t-BuOH yielded Xaa-Gly-type fluoroalkene isosteres exemplified by 23, 30, and 35. Replacement of the t-BuOH kinetic trapping agent with aldehydes or ketones provided access to a-substituted fluoroalkene isosteres (43 and 45) through aldol reactions of Sm-dienolates with the carbonyl compounds. Of particular note, the use of the SmI2-HCHO reagent system with chiral enoate 34 provided D-Phe-psi[(Z)-CF=CH]-D/L-Ser isosteres (45), which could be converted to enantiomerically pure isosteres (49-52) that bore a variety of side chain functionalities at the a-position. This was achieved by a sequence of manipulations consisting of beta-lactone formation followed by chromatographic separation and ring-opening with soft nucleophiles. Included in the present work is the first utilization of a Rh-catalyzed Reformatsky reaction of chiral imines for the stereoselective preparation of alpha,alpha-difluoro-beta-amino acid derivatives (28 and 33). The appropriate choice of reagents (carbonyl compounds for kinetic trapping or ring-opening nucleophiles and imines for Reformatsky reactions) allows the presented methodology to yield various fluoroalkene isosteres possessing a wide range of side chain functionalities.

  DOI：

  10.1021/jo035709d
• 作为产物：
  描述：

  苯乙醛 、 bromozinc(1+),ethyl 2,2-difluoroacetate 以 四氢呋喃 为溶剂， 生成 ethyl 2,2-difluoro-3-hydroxy-4-phenylbutanoate
  参考文献：
  名称：

  Synthesis of (Z)-fluoroalkene dipeptide isosteres utilizing organocopper-mediated reduction of γ,γ-difluoro-α,β-enoates

  摘要：

  gamma,gamma -Difluoro-alpha,beta -enoates are reduced with organocopper reagents to afford the corresponding gamma -fluoro-beta,gamma -enoates. This organocopper-mediated reduction was applied to the synthesis of (Z)-fluoroalkene dipeptide isosteres. (C) 2000 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4039(00)01924-9

文献信息

• Synthesis of stereocontrolled α,α-difluoro-β-hydroxycarbonyl materials
  作者：Takeshi Kaneda、Shinya Komura、Tomoya Kitazume

  DOI：10.1016/j.jfluchem.2004.09.026

  日期：2005.1

  Synthesis and synthetic utilities of stereocontrolled alpha, alpha-di fluoro-beta-hydroxy-gamma,delta-unsaturated carbonyl compounds via enzymatic resolution with lipase PS (Pseudomonas cepacia, Amano Pharmaceutical Co. Ltd.) or lipase MY (Candida rugosa, Meito Sangyo Co. Ltd.) were described, and then the absolute configuration of obtained chiral materials was determined by the modified Mosher's method. (C) 2004 Elsevier B.V. All rights reserved.
• SmI₂-Mediated Reduction of γ,γ-Difluoro-α,β-enoates with Application to the Synthesis of Functionalized (<i>Z</i>)-Fluoroalkene-Type Dipeptide Isosteres
  作者：Akira Otaka、Junko Watanabe、Akira Yukimasa、Yoshikazu Sasaki、Hideaki Watanabe、Takayoshi Kinoshita、Shinya Oishi、Hirokazu Tamamura、Nobutaka Fujii

  DOI：10.1021/jo035709d

  日期：2004.3.1

  A samarium diiodide (SmI2)-mediated reduction of gamma,gamma-difluoro-alpha,beta-enoates (15, 29, and 34) was successfully applied to the synthesis of (Z)-fluoroalkene dipeptide isosteres (23, 30, and 35), which have served as potential dipeptide mimetics. Reduction of the gamma,gamma-difluoro-alpha,beta-enoates by SmI2 proceeded via successive two-electron transfers to form dienolate species which upon kinetically controlled trapping with t-BuOH yielded Xaa-Gly-type fluoroalkene isosteres exemplified by 23, 30, and 35. Replacement of the t-BuOH kinetic trapping agent with aldehydes or ketones provided access to a-substituted fluoroalkene isosteres (43 and 45) through aldol reactions of Sm-dienolates with the carbonyl compounds. Of particular note, the use of the SmI2-HCHO reagent system with chiral enoate 34 provided D-Phe-psi[(Z)-CF=CH]-D/L-Ser isosteres (45), which could be converted to enantiomerically pure isosteres (49-52) that bore a variety of side chain functionalities at the a-position. This was achieved by a sequence of manipulations consisting of beta-lactone formation followed by chromatographic separation and ring-opening with soft nucleophiles. Included in the present work is the first utilization of a Rh-catalyzed Reformatsky reaction of chiral imines for the stereoselective preparation of alpha,alpha-difluoro-beta-amino acid derivatives (28 and 33). The appropriate choice of reagents (carbonyl compounds for kinetic trapping or ring-opening nucleophiles and imines for Reformatsky reactions) allows the presented methodology to yield various fluoroalkene isosteres possessing a wide range of side chain functionalities.
• Synthesis of (Z)-fluoroalkene dipeptide isosteres utilizing organocopper-mediated reduction of γ,γ-difluoro-α,β-enoates
  作者：Akira Otaka、Hideaki Watanabe、Etsuko Mitsuyama、Akira Yukimasa、Hirokazu Tamamura、Nobutaka Fujii

  DOI：10.1016/s0040-4039(00)01924-9

  日期：2001.1

  gamma,gamma -Difluoro-alpha,beta -enoates are reduced with organocopper reagents to afford the corresponding gamma -fluoro-beta,gamma -enoates. This organocopper-mediated reduction was applied to the synthesis of (Z)-fluoroalkene dipeptide isosteres. (C) 2000 Elsevier Science Ltd. All rights reserved.