Ionic and Covalent Copper(II)-Based Catalysts for Michael Additions. The Mechanism
摘要:
Cu(SbF6)(2)-AdamBox and copper(II) bis-(5-tert-butylsalicylaldehydate) catalyze the Michael addition in neutral media. Mechanistic studies, based on UV-vis, IR, and electrospray ionization mass spectrometry (ESI-MS), suggest that copper enolates of the beta-dicarbonyl formed in situ are the active nucleophilic species.