(E)-2-benzylidene-4-(3,4,5-trimethoxyphenyl)but-3-ynal | 1311273-07-0

• 分子结构分类: 有机化合物 - 木脂素、新木脂素和相关化合物
• 英文名称: (E)-2-benzylidene-4-(3,4,5-trimethoxyphenyl)but-3-ynal
• 英文别名: (2E)-2-benzylidene-4-(3,4,5-trimethoxyphenyl)but-3-ynal
• CAS: 1311273-07-0
• 化学式: C₂₀H₁₈O₄
• 分子量: 322.361
• InChiKey: JYZDQRVUZPCPEM-GZTJUZNOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.8
• 重原子数：
  24
• 可旋转键数：
  7
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.15
• 拓扑面积：
  44.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (E)-2-benzylidene-4-(3,4,5-trimethoxyphenyl)but-3-ynal 在 正丁基锂 、 三苯基膦氯金 、 三氟化硼乙醚 、 silver trifluoromethanesulfonate 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 为溶剂， 反应 1.0h， 生成 (3E)-4-((E)-3-benzylidene-2-phenyl-5-(3,4,5-trimethoxyphenyl)cyclopenta-1,4-dienyl)but-3-en-2-one
  参考文献：
  名称：

  Gold-Catalyzed Approach to Multisubstituted Fulvenes via Cycloisomerization of Furan/Ynes

  摘要：

  A new approach to functionalized fulvenes with an enone or enal moiety has been developed through gold-catalyzed intramolecular cycloisomerization of furan/ynes with a two-carbon tether in between the furan and the triple bond. The reaction proceeds with complete regioselectivity via a 6-endo-cyclization and high stereoselectivity. Moreover, the E- or Z-stereochemistry of the double bond in fulvene products can be easily controlled by performing the reaction in different solvents.

  DOI：

  10.1021/jo2004023
• 作为产物：
  描述：

  (2Z)-2-bromo-3-phenyl-2-propenal 、 3.4.5-三甲氧基苯乙炔 在 copper(l) iodide 、 四(三苯基膦)钯 、 三乙胺 作用下， 以 四氢呋喃 为溶剂， 以87%的产率得到(E)-2-benzylidene-4-(3,4,5-trimethoxyphenyl)but-3-ynal
  参考文献：
  名称：

  Gold-Catalyzed Approach to Multisubstituted Fulvenes via Cycloisomerization of Furan/Ynes

  摘要：

  A new approach to functionalized fulvenes with an enone or enal moiety has been developed through gold-catalyzed intramolecular cycloisomerization of furan/ynes with a two-carbon tether in between the furan and the triple bond. The reaction proceeds with complete regioselectivity via a 6-endo-cyclization and high stereoselectivity. Moreover, the E- or Z-stereochemistry of the double bond in fulvene products can be easily controlled by performing the reaction in different solvents.

  DOI：

  10.1021/jo2004023

文献信息

• Gold-Catalyzed Cascade Reactions of Furan-ynes with External Nucleophiles Consisting of a 1,2-Rearrangement: Straightforward Synthesis of Multi-Substituted Benzo[<i>b</i>]furans
  作者：Ning Sun、Xin Xie、Yuanhong Liu

  DOI：10.1002/chem.201400112

  日期：2014.6.10

  A gold‐catalyzed cycloisomerization of silyl‐protected 2‐(1‐alkynyl)‐2‐alken‐1‐(2‐furanyl)‐1‐ols with various nucleophiles including water, alcohol, aniline, sulfonamide, and electron‐rich arene has been developed. The method provides a highly efficient access to 5,7‐disubstituted or 2,5,7‐trisubstituted benzo[b]furans with a wide diversity of substituents under mild reaction conditions, which are

  甲硅烷基保护的2-（1-炔基）-2-烯基-1-（2-呋喃基）-1-醇与各种亲核试剂（包括水，醇，苯胺，磺酰胺和富电子芳烃）的金催化环异构化反应已开发。该方法提供了以高效率的存取5,7-二取代的或2,5,7-三取代的苯并[ b ]呋喃与取代基的反应条件温和，这是不通过其他方法容易获得下一个广泛的多样性。值得注意的是，在环化过程中，烷基从呋喃环的C2到C3位置发生了有趣的重排。通过以下金辅助的烯丙基取代，可以在其C5位侧链上修饰具有广泛官能团的苯并[ b ]呋喃。
• Gold-Catalyzed Approach to Multisubstituted Fulvenes via Cycloisomerization of Furan/Ynes
  作者：Yifeng Chen、Yuanhong Liu

  DOI：10.1021/jo2004023

  日期：2011.7.1

  A new approach to functionalized fulvenes with an enone or enal moiety has been developed through gold-catalyzed intramolecular cycloisomerization of furan/ynes with a two-carbon tether in between the furan and the triple bond. The reaction proceeds with complete regioselectivity via a 6-endo-cyclization and high stereoselectivity. Moreover, the E- or Z-stereochemistry of the double bond in fulvene products can be easily controlled by performing the reaction in different solvents.