4-benzyl-3-methylenedihydrofuran-2(3H)-one | 130190-21-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酯类
• 英文名称: 4-benzyl-3-methylenedihydrofuran-2(3H)-one
• 英文别名: 4-benzyl-3-methylideneoxolan-2-one
• CAS: 130190-21-5
• 化学式: C₁₂H₁₂O₂
• 分子量: 188.226
• InChiKey: QDVZRVDKKPKLCP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.96
• 重原子数：
  14.0
• 可旋转键数：
  2.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  26.3
• 氢给体数：
  0.0
• 氢受体数：
  2.0

反应信息

• 作为产物：
  描述：

  3-苯丙醇 在 辛酸铑 、 potassium tert-butylate 、 1-丙基磷酸酐 、 N,N-二异丙基乙胺 、 lithium hexamethyldisilazane 作用下， 以 四氢呋喃 、 二氯甲烷 、 乙酸乙酯 、 甲苯 为溶剂， 反应 28.42h， 生成 4-benzyl-3-methylenedihydrofuran-2(3H)-one
  参考文献：
  名称：

  A One-Pot C–H Insertion/Olefination Sequence for the Formation of α-Alkylidene-γ-butyrolactones

  摘要：

  A one-pot C-H insertion/olefination sequence for the conversion of alpha-diazo-alpha-(dialkoxyphosphoryl)acetates into alpha-alkylidene-gamma-butyrolactones is reported. The key C-H insertion process is achieved using a catalytic amount of a dirhodium carboxylate catalyst, using operationally simple conditions. The size and electronic properties of the attached substituents were found to influence the regio- and diastereoselectivity of the process. The utility of the process is demonstrated by the synthesis of a known Staphylococcus aureus (MRSA) virulence inhibitor.

  DOI：

  10.1021/ol501092m

文献信息

• Phosphorylated cyclopropanes in the synthesis of α-alkylidene-γ-butyrolactones: total synthesis of (±)-savinin, (±)-gadain and (±)-peperomin E
  作者：Matthew G. Lloyd、Richard J. K. Taylor、William P. Unsworth

  DOI：10.1039/c6ob01527a

  日期：——

  Phosphorylated cyclopropanes, generated via the Rh(II)-catalysed intramolecular cyclopropanation of α-(diethoxyphosphoryl)acetates, have been found to be useful precursors in the synthesis of α-alkylidene-γ-butyrolactones. These cyclopropyl intermediates undergo regioselective reductive ring-opening and subsequent Horner–Wadsworth–Emmons olefination to complete the synthesis. Total syntheses of (±)-savinin

  已经发现，通过Rh（II）催化的α-（二乙氧基磷酰基）乙酸酯的分子内环丙烷化生成的磷酸化环丙烷是α-亚烷基-γ-丁内酯合成中的有用前体。这些环丙基中间体会进行区域选择性还原性开环反应，随后进行Horner-Wadsworth-Emmons烯化反应以完成合成。（±）-savinin和（±）-gadain的总合成，以及（±）-peperomin E的第一个总合成，均使用此方法进行了描述。
• α-Alkylidene-γ-butyrolactone synthesis via one-pot C–H insertion/olefination: substrate scope and the total synthesis of (±)-cedarmycins A and B
  作者：Matthew G. Lloyd、Mariantonietta D'Acunto、Richard J.K. Taylor、William P. Unsworth

  DOI：10.1016/j.tet.2014.09.054

  日期：2015.9

  A system for the synthesis of alpha-alkylidene-gamma-butyrolactones via a one-pot C-H insertion/olefination sequence is described. The process is based on the rhodium catalysed C-H insertion reaction of alpha-diazoa-(diethoxyphosphoryl)acetates. The mild reaction conditions, operational simplicity and ready availability of starting materials are all key features. A wide range of successful reaction systems are reported (41 examples) highlighting the generality of the method. The application of this method in the total synthesis of the natural products (+/-)-cedarmycins A and B is also described. (C) 2014 Elsevier Ltd. All rights reserved.
• LEE, EUN;KO, SUNG BO;JUNG, KYUNG WOON;CHANG, MOON HO, TETRAHEDRON LETT., 30,(1989) N, C. 827-828
  作者：LEE, EUN、KO, SUNG BO、JUNG, KYUNG WOON、CHANG, MOON HO

  DOI：——

  日期：——
• A One-Pot C–H Insertion/Olefination Sequence for the Formation of α-Alkylidene-γ-butyrolactones
  作者：Matthew G. Lloyd、Richard J. K. Taylor、William P. Unsworth

  DOI：10.1021/ol501092m

  日期：2014.5.16

  A one-pot C-H insertion/olefination sequence for the conversion of alpha-diazo-alpha-(dialkoxyphosphoryl)acetates into alpha-alkylidene-gamma-butyrolactones is reported. The key C-H insertion process is achieved using a catalytic amount of a dirhodium carboxylate catalyst, using operationally simple conditions. The size and electronic properties of the attached substituents were found to influence the regio- and diastereoselectivity of the process. The utility of the process is demonstrated by the synthesis of a known Staphylococcus aureus (MRSA) virulence inhibitor.