Challenging 50 Years of
Established Views on Ugi Reaction:
A Theoretical Approach
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Abstract
The Ugi reaction is one of the most famous multicomponent
couplings,
and its efficiency is still explained by the original mechanism suggested
by Ugi in the 60s. This article aims to present a thorough theoretical
study of this reaction. It describes how the imine is activated and
how the new stereogenic center is formed. Our calculations strongly
suggest alternatives to some commonly accepted features, such as the
reversibility of the intermediate steps, and temper the nature of
the driving force of the reaction