Sonochemical cycloadditions in ionic liquids. Lessons from model cases involving common dienes and carbonyl dienophiles

Ultrason Sonochem. 2006 Jul;13(5):408-14. doi: 10.1016/j.ultsonch.2005.07.001. Epub 2005 Sep 26.

Abstract

This contribution describes a series of sonochemical cycloadditions involving either cyclopentadiene or 1,3-cyclohexadiene with carbonyl dienophiles in an imidazolium-based ionic liquid as reaction medium. In general, ultrasound does effectively improve these processes in terms of higher yields and/or shorter reaction times when compared with the corresponding silent reactions. Stereoselectivities, however, remain practically unaffected by sonication. The role of ionic liquids under ultrasonic activation is also discussed.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chemistry / methods*
  • Chromatography, Thin Layer
  • Cyclohexanes / chemistry*
  • Cyclohexenes
  • Cyclopentanes / chemistry*
  • Ions*
  • Magnetic Resonance Spectroscopy
  • Models, Chemical
  • Solvents / chemistry
  • Sonication*
  • Temperature
  • Ultrasonics

Substances

  • Cyclohexanes
  • Cyclohexenes
  • Cyclopentanes
  • Ions
  • Solvents
  • 1,3-cyclohexadiene