Organocatalytic Asymmetric Michael Addition of Rhodanines to Azadienes for Assembling of Sulfur‐containing Tetrasubstituted Carbon Stereocenters

The squaramide catalyzed enantioselective Michael addition of rhodanines to 2‐arylidene‐ N ‐tosylbenzofuran‐3(2 H )‐imines has been established, which enables the formation of benzofurans bearing both rhodanine and sulfur‐containing tetrasubstituted stereocenter structural motif in good to high yields with good to excellent enantio‐ and diastereoselectivities. magnified...