1,3,6,8-tetraphenyloctane-2,7-dione

• 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: 1,3,6,8-tetraphenyloctane-2,7-dione
• 英文别名: 1,3,6,8-Tetraphenyl-octane-2,7-dione
• 化学式: C₃₂H₃₀O₂
• 分子量: 446.589
• InChiKey: MWJAGPQAONIWAD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.8
• 重原子数：
  34
• 可旋转键数：
  11
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.19
• 拓扑面积：
  34.1
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  二苄基甲酮 、 alkaline earth salt of/the/ methylsulfuric acid 在 正丁基锂 、 四甲基乙二胺 、 lithium hydride 作用下， 以 正己烷 为溶剂， 反应 52.0h， 生成 1,3,6,8-tetraphenyloctane-2,7-dione
  参考文献：
  名称：

  Reactions of the Lithium Salts of the Tribenzylidenemethane Dianion, Diphenylacetone Dianion, and Related Compounds

  摘要：

  Potentially synthetically useful reactions of the dilithium salts of the title dianions have been investigated, Electrophilic quenching with a variety of reagents usually leads to the expected products in good yield. Quenching the diphenylacetone dianion with 1 equiv of trimethylchlorosilane, however, gives a good yield of 1,3-diphenylallene obtained by formal elimination of a trimethylsiloxy anion from an intermediate monoquenched monoanion salt. NMR studies, however, do not reveal the intermediacy of the 1,3-diphenyl-2-(trimethylsiloxy)allyl anion but rather suggest that the initial reaction site is at carbon, rather than oxygen, Oxidation of the dianions leads either to ring closure or dimerization for the tribenzylidenemethane dianion and to dimerization for the diphenylacetone dianion. The dimerization reactions are stereospecific, both with respect to the two new stereocenters produced and for the double bonds of the bis-silyl enol ether products if the dimeric bis-enolate dianion products are quenched with trimethylchlorosilane.

  DOI：

  10.1021/jo971113c