Transformations of several monoterpenoids in the presence of aldehydes in supercritical solvents
摘要:
The reactivity of verbenol epoxide and isopulegol in supercritical solvents in the presence of aromatic aldehydes was studied using a flow type reactor and a heterogeneous catalyst (Al2O3) or no catalyst. The intramolecular transformations or interactions of reagents with the solvent prevailed in all cases; the yield of the products of intermolecular reactions of terpenoids with aldehydes was up to 1%. The aldehydes did not interact with verbenol epoxide but produced a considerable effect on the distribution of its isomerization products.
Reactions of Verbenol Epoxide with Aromatic Aldehydes Containing Hydroxy or Methoxy Groups in the Presence of Montmorillonite Clay
作者:Irina V. Il'ina、Konstantin P. Volcho、Oksana S. Mikhalchenko、Dina V. Korchagina、Nariman F. Salakhutdinov
DOI:10.1002/hlca.201000269
日期:2011.3
The reactions of (−)‐cis‐verbenol epoxide with a number of aromatic aldehydescontaining OH and/or MeO groups in the presence of montmorillonite K10 clay have been studied. Several new O‐containing heterocyclic compounds with different frameworks, including compounds with a previously unknown octahydro‐2H‐4,6‐(epoxymethano)chromene framework, have been synthesized. Introduction of one donor substituent
研究了在蒙脱土K10粘土存在下(-)-顺式-邻苯二酚-环氧化合物与许多含有OH和/或MeO基团的芳族醛的反应。已经合成了几种具有不同骨架的新的含O杂环化合物,包括具有未知的八氢-2 H - 4,6-(环氧亚甲基)色烯骨架的化合物。在苯甲醛分子中引入一个供体取代基导致分子间副产物的总产率降低,而引入两个或更多个取代基导致这些产物的产率提高。