Ionic and covalent copper(II)-based catalysts for Michael additions. The mechanism |
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| Authors: | Comelles Josep Moreno-Mañas Marcial Pérez Elisabet Roglans Anna Sebastián Rosa M Vallribera Adelina |
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| Institution: | Department of Chemistry, Universitat Autonoma de Barcelona, Cerdanyola, 08193-Barcelona, Spain. |
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| Abstract: | 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. |
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