Reaction mechanisms
Part (ii) Pericyclic reactions
Abstract
This report surveys the 2007 literature on mechanisms of pericyclic reactions. One recurring theme in this year’s reports is catalysis. Several studies addressed the catalysis of cycloaddition reactions by preorganization (via encapsulation, hydrogen bond directed precomplex formation, or hydrophobic effects) or selective transition state stabilization (viahydrogen bonding interactions) and the acceleration of sigmatropic shifts by selective transition state stabilization (viahydrogen bonding, transition metal complexation, and weak interactions with