Low-Valent Indium as a Catalyst for the Allylation of Ketones and N-Acylhydrazones

Indium summer: The use of low-valent indium species in organic chemistry was, until quite recently, underdeveloped. Then came reports of indium(I) halides serving as excellent catalysts for the allylation of ketones and N-acylhydrazones with pinacol allylboronates, and more recently of indium(0) being used as a catalyst for the allylation of ketones in water.