Enantioselective Synthesis of N-Phenyl-dihydropyrano[2,3-c]pyrazoles via Cascade Michael Addition/Thorpe-Ziegler Type Cyclization Catalyzed by a Chiral Squaramide
Enantioselective Synthesis of N-Phenyl-dihydropyrano[2,3-c]pyrazoles via Cascade Michael Addition/Thorpe-Ziegler Type Cyclization Catalyzed by a Chiral Squaramide