The Discovery of Novel Metal‐Induced Reactions of Nitrones: Not Only Electrophiles and Reagents for [3+2] Cycloadditions

Tales of the unexpected: A multitude of new reactions have been discovered for nitrones, the chemistry of which was considered well established. Two of them, a formal [3+3] cycloaddition and a pinacol-type coupling (see scheme) are induced by lanthanide derivatives and appear particularly promising and attractive for the synthesis of natural products and complex molecules.