Asymmetric Michael addition of 4H-thiopyran-4-one to nitroolefins catalyzed by diamine mono-N-sulfonamide and its application to concise synthesis of enantiopure multiring heterocycles
Keywords: هتروسیکل; Organocatalysis; 2â²-Bipyrrolidine; Michael addition; 4H-Thiopyran-4-one; Heterocycle;