Zirconium-Mediated Intramolecular Coupling Reactions of Unsaturated Anilines. Diastereoselective Synthesis of Azetidines
摘要:
Imine complexes of zirconocene, generated by a beta-hydrogen abstraction process, which possess a carbon-carbon multiple bond, undergo inter-or intramolecular carbometalation to afford 1,4-cyclohexanediamine or cycloalkylaniline derivatives depending on the relative position of the unsaturated moiety with respect to the imine complex. A new diastereoselective synthesis of azetidines has been developed by treatment of azazirconacyclopentanes with iodine.