2-(3,4,5-trimethoxyphenyl)-2H-chromene | 1413850-22-2

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 黄酮类化合物
• 英文名称: 2-(3,4,5-trimethoxyphenyl)-2H-chromene
• CAS: 1413850-22-2
• 化学式: C₁₈H₁₈O₄
• 分子量: 298.339
• InChiKey: HYNVTEACLLCSLI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  22
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  36.9
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  2-(3,4,5-trimethoxyphenyl)-2H-chromene 在 chloroauric acid 、 水 作用下， 以 二氯甲烷 为溶剂， 反应 24.0h， 以78%的产率得到3-(2-hydroxyphenyl)-1-(3,4,5-trimethoxyphenyl)propan-1-one
  参考文献：
  名称：

  An unexpected rearrangement-hydration reaction sequence of 2H-chromenes to dihydrochalcones under catalysis of HAuCl4

  摘要：

  2-Aryl-2H-chromenes in aqueous DCM medium under catalysis of HAuCl4 are converted into 3-(2-hydroxyaryl)-1-arylpropan-1-ones through hydration-rearrangement reaction sequence in very good yield. The key step probably involves the [1,5] hydride shift followed by the hydrolysis under the reaction condition. The notable advantages of this method are operational simplicity and ease of isolation of products and also provide a pathway to convert the chalcone into DHCs with the transposition of carbonyl group. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2012.08.117
• 作为产物：
  描述：

  3,4,5-三甲氧基苯甲醛 在 sodium tetrahydroborate 、 sodium hydroxide 作用下， 以 乙醇 、 水 、 异丙醇 为溶剂， 生成 2-(3,4,5-trimethoxyphenyl)-2H-chromene
  参考文献：
  名称：

  An unexpected rearrangement-hydration reaction sequence of 2H-chromenes to dihydrochalcones under catalysis of HAuCl4

  摘要：

  2-Aryl-2H-chromenes in aqueous DCM medium under catalysis of HAuCl4 are converted into 3-(2-hydroxyaryl)-1-arylpropan-1-ones through hydration-rearrangement reaction sequence in very good yield. The key step probably involves the [1,5] hydride shift followed by the hydrolysis under the reaction condition. The notable advantages of this method are operational simplicity and ease of isolation of products and also provide a pathway to convert the chalcone into DHCs with the transposition of carbonyl group. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2012.08.117

文献信息

• An efficient oxidative conversion of 2-aryl-2H-chromenes to the corresponding flavones by tert-butylhydroperoxide and copper bromide
  作者：Dipanwita Banerjee、Utpal Kayal、Gourhari Maiti

  DOI：10.1016/j.tetlet.2016.03.006

  日期：2016.4

  A simple and efficient method has been developed for the facile oxidation of chromenes to the corresponding flavones by tert-butylhydroperoxide (TBHP) in the presence of copper(II) bromide catalyst in toluene at 80 °C in a very short time. The reaction demonstrates excellent reactivity, functional group tolerance, and good to excellent yields without using conventional strong oxidizing agents.

  已经开发了一种简单有效的方法，用于在80℃下于很短时间内在甲苯中存在溴化铜（II）的情况下，通过叔丁基氢过氧化物（TBHP）轻松地将二甲基苯酮氧化为相应的黄酮。该反应显示出优异的反应性，官能团耐受性以及良好至优异的产率，而无需使用常规的强氧化剂。