Cyclohexane-1,2-diamines: Efficient Catalysts for the Enantioselective Conjugate Addition of Ketones to Nitro Olefins
作者:Ramesh Rasappan、Oliver Reiser
DOI:10.1002/ejoc.200801263
日期:2009.3
Simple monosulfonated cyclohexane-1,2-diamines are highly enantioselective organocatalysts for the conjugate addition of ketones to nitroolefins. By focusing on aromatic ketones as the most challenging substrates, selectivities of up to 98 % ee can be achieved for the title reaction. Moreover, a three-component process between the primary amine catalyst, the nitroalkene, and the ketone, which results