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A highly enantioselective Mannich reaction of biphenyl‐bridged seven‐membered cyclic N‐sulfonylimines with methyl alkyl ketones is disclosed in this study. The reaction was performed under organocatalysis by using a quinine‐derived primary amine as the catalyst in combination with a Brønsted acid as the co‐catalyst. High yields (up to 89 %) and excellent enantioselectivities (up to 97 % ee) were observed...
In this work, nitrogen‐annulated perylene (NP) was dimerized into one framework connected by two nitrogen atoms, generating the target molecule of DNP−DA. Owing to the substructure of 1,6‐diazecine ten‐membered ring, DNP−DA illustrates helical chirality with moderate dissymmetry factor, elevated molecular levels, expanded conjugation and supramolecular interactions with acceptors etc. Notably, DNP−DA...