| 1410804-67-9

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 直链 1,3-二芳基丙烷
• CAS: 1410804-67-9
• 化学式: C₁₉H₂₀O₄
• 分子量: 312.365
• InChiKey: HNCMMCTWYDCSOA-CSKARUKUSA-N

反应信息

• 作为反应物：
  描述：

  以 乙醇 、 水 为溶剂， 生成 3'-butoxy-7-hydroxyflavylium hydrogensulphate
  参考文献：
  名称：

  Synthesis, characterization and photochromism of 3′-butoxyflavylium derivatives

  摘要：

  The compounds 3'-butoxy-7-methoxyflavylium and 3'-butoxy-7-hydroxyflavylium were synthesized and the respective equilibrium and rate constants determined by two complementary techniques, pH jumps and flash photolysis. An experimental strategy based on these two techniques allowed calculation of all the equilibrium and rate constants of the system carried out for the first time in flavylium compounds lacking of the high cis-trans isomerization barrier. Irradiation of the trans-chalcone gives rise to the formation of the cis-chalcone still during the lifetime of the flash, which disappears through two parallel reactions: (i) one leading to the recovery of the trans-chalcone and the other, (ii) forming flavylium cation via hemiketal. This last reaction is globally dependent on pH and at less acidic pH the system reverts back to the trans-chalcone. The highest yield of colour production upon the flash takes place in the pH range 2-3.5. (c) 2012 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jphotochem.2012.06.013
• 作为产物：
  描述：

  3'-butoxy-7-hydroxyflavylium hydrogensulphate 以 乙醇 、 水 为溶剂， 生成
  参考文献：
  名称：

  Synthesis, characterization and photochromism of 3′-butoxyflavylium derivatives

  摘要：

  The compounds 3'-butoxy-7-methoxyflavylium and 3'-butoxy-7-hydroxyflavylium were synthesized and the respective equilibrium and rate constants determined by two complementary techniques, pH jumps and flash photolysis. An experimental strategy based on these two techniques allowed calculation of all the equilibrium and rate constants of the system carried out for the first time in flavylium compounds lacking of the high cis-trans isomerization barrier. Irradiation of the trans-chalcone gives rise to the formation of the cis-chalcone still during the lifetime of the flash, which disappears through two parallel reactions: (i) one leading to the recovery of the trans-chalcone and the other, (ii) forming flavylium cation via hemiketal. This last reaction is globally dependent on pH and at less acidic pH the system reverts back to the trans-chalcone. The highest yield of colour production upon the flash takes place in the pH range 2-3.5. (c) 2012 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jphotochem.2012.06.013