Advertisement

Metallopinacolate Intermediates in the Reductive Coupling of Acetone Promoted by Uranium Reagents

Authors


Abstract

original image

New aspects of the mechanism of the McMurry reaction were revealed by studying the coupling of acetone with uranium tetrachloride and lithium or sodium amalgam. The two metallopinacolate intermediates 1 and 2 were isolated. Only the cyclic complex 2, formed by reaction of 1 with the reducing agent, was transformed, under more forcing conditions, into tetramethylethylene. Counterion: Li+.

Ancillary