Allylation of aldehyde and ketone, and prenylation of 2-chlorobenzoquinone were achieved by using a combination of a catalytic amount of indium(III) chloride and metallic aluminium or zinc.

Allylation of Carbonyl Compounds with a Catalytic Amount of Indium. -Allylation reactions using stoichiometric amounts of allylindium are known. The method described here requires catalytic amounts of indium in combination with metallic Al or Zn. The catalytic mechanism is discussed. In these reactions the solvent system is important; the presence of water is effective to suppress undesired side reactions. -(ARAKI, S.; JIN, S.-J.; IDOU, Y.; BUTSUGAN, Y.; Bull. Chem.