2,4-di-tert-butyl-6-ethynyl-(3-butenyloxy)benzene | 359011-25-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 2,4-di-tert-butyl-6-ethynyl-(3-butenyloxy)benzene
• 英文别名: 4,6-di-tert-butyl-2-ethynyl-(3-butenyloxy)benzene；2-But-3-enoxy-1,5-ditert-butyl-3-ethynylbenzene
• CAS: 359011-25-9
• 化学式: C₂₀H₂₈O
• 分子量: 284.442
• InChiKey: PJIZPRFFCUKLBD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.6
• 重原子数：
  21
• 可旋转键数：
  7
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  2,4-di-tert-butyl-6-ethynyl-(3-butenyloxy)benzene 、 alkaline earth salt of/the/ methylsulfuric acid 在 N-甲基吲哚酮 、 氧气 作用下， 以 二氯甲烷 为溶剂， 反应 2.0h， 以63%的产率得到(1R,11S,12R)-4,6-ditert-butyl-8,13-dioxatetracyclo[9.2.2.01,12.02,7]pentadeca-2(7),3,5-trien-14-one
  参考文献：
  名称：

  Steric buttressing in the Pauson–Khand reactions of aryl enynes

  摘要：

  A variety of aryl enynes have been constructed from o-iodophenol derivatives containing ortho-tert-butyl groups via O-alkylation and a Sonogashira cross-coupling reaction. These substrates undergo efficient thermal and oxidative intramolecular Pauson-Khand reactions leading to the formation of sterically congested cyclopentenones, as well as the formation of medium-sized rings, although in the latter case with unusual regioselectivity. Incorporation of a TMS moiety on the alkyne group in a higher homolog led to cyclization via the normal mode, albeit in relatively low yield. (c) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2007.03.131
• 作为产物：
  描述：

  2,4-二叔丁基苯酚 在 bis-triphenylphosphine-palladium(II) chloride 、 copper(l) iodide N-碘代丁二酰亚胺 、 potassium carbonate 、 三乙胺 、 三苯基膦 、 偶氮二甲酸二乙酯 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 反应 15.0h， 生成 2,4-di-tert-butyl-6-ethynyl-(3-butenyloxy)benzene
  参考文献：
  名称：

  Steric buttressing in the Pauson–Khand reactions of aryl enynes

  摘要：

  A variety of aryl enynes have been constructed from o-iodophenol derivatives containing ortho-tert-butyl groups via O-alkylation and a Sonogashira cross-coupling reaction. These substrates undergo efficient thermal and oxidative intramolecular Pauson-Khand reactions leading to the formation of sterically congested cyclopentenones, as well as the formation of medium-sized rings, although in the latter case with unusual regioselectivity. Incorporation of a TMS moiety on the alkyne group in a higher homolog led to cyclization via the normal mode, albeit in relatively low yield. (c) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2007.03.131

文献信息

• Synthesis of Bridged Medium-Sized Rings through the Intramolecular Pauson−Khand Reaction
  作者：Carl J. Lovely、Hemalatha Seshadri、Brian R. Wayland、A. Wallace Cordes

  DOI：10.1021/ol016308s

  日期：2001.8.9

  [GRAPHICS]A series of aromatic enynes containing steric buttressing elements were prepared and evaluated in the NMO-mediated Pauson-Khand cyclization. O-Allyl systems led to the expected angularly fused products, whereas the O-butenyl and O-pentenyl derivatives afforded the unprecedented bridge systems.