4,6,6-trimethyl-6H-dibenzo[b,d]pyran | 1408053-97-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: 4,6,6-trimethyl-6H-dibenzo[b,d]pyran
• 英文别名: 4,6,6-Trimethylbenzo[c]chromene
• CAS: 1408053-97-3
• 化学式: C₁₆H₁₆O
• 分子量: 224.302
• InChiKey: BRLPRAMMAWXDRW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  17
• 可旋转键数：
  0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  2-碘代甲苯 、 2-(2-溴苯基)-2-丙醇 在 norbornene 、 palladium diacetate 、 potassium carbonate 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 24.0h， 以79%的产率得到4,6,6-trimethyl-6H-dibenzo[b,d]pyran
  参考文献：
  名称：

  A Sequential Pd/Norbornene-Catalyzed Process Generates o-Biaryl Carbaldehydes or Ketones via a Redox Reaction or 6H-Dibenzopyrans by C–O Ring Closure

  摘要：

  o-Biaryl carbaldeydes and ketones are obtained through the one-pot reaction of o-aryl iodides with o-bromobenzyl alcohols under the catalytic action of Pd and norbornene, in the presence of a base. The same reaction can also give dibenzopyrans by Pd and norbornene catalysis with a different termination, leading to C-O ring closure. In both cases the process first leads to a five-membered palladacycle, which controls C-C coupling, then to a seven-membered oxapalladacycle, which gives aldehydes and ketones or dibenzopyrans.

  DOI：

  10.1021/ol302889t

文献信息

• US3947468A
  申请人：——

  公开号：US3947468A

  公开（公告）日：1976-03-30
• A Sequential Pd/Norbornene-Catalyzed Process Generates <i>o-</i>Biaryl Carbaldehydes or Ketones via a Redox Reaction or 6<i>H</i>-Dibenzopyrans by C–O Ring Closure
  作者：Elena Motti、Nicola Della Ca’、Di Xu、Anna Piersimoni、Elena Bedogni、Zhi-Ming Zhou、Marta Catellani

  DOI：10.1021/ol302889t

  日期：2012.11.16

  o-Biaryl carbaldeydes and ketones are obtained through the one-pot reaction of o-aryl iodides with o-bromobenzyl alcohols under the catalytic action of Pd and norbornene, in the presence of a base. The same reaction can also give dibenzopyrans by Pd and norbornene catalysis with a different termination, leading to C-O ring closure. In both cases the process first leads to a five-membered palladacycle, which controls C-C coupling, then to a seven-membered oxapalladacycle, which gives aldehydes and ketones or dibenzopyrans.