E-3-ethylidene-4-(4-methoxyphenyl)dihydrofuran-2(3H)-one | 1607455-39-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: E-3-ethylidene-4-(4-methoxyphenyl)dihydrofuran-2(3H)-one
• CAS: 1607455-39-9
• 化学式: C₁₃H₁₄O₃
• 分子量: 218.252
• InChiKey: GIVKUGARZNGBQU-QDEBKDIKSA-N

物化性质

• 沸点：
  393.6±42.0 °C(predicted)
• 密度：
  1.201±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.28
• 重原子数：
  16.0
• 可旋转键数：
  2.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  35.53
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为产物：
  描述：

  对甲氧基苯乙醇 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 Z-3-ethylidene-4-(4-methoxyphenyl)dihydrofuran-2(3H)-one 、 E-3-ethylidene-4-(4-methoxyphenyl)dihydrofuran-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

• 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.