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  4. C<inf>4</inf>-Symmetric Inherently Chiral Macrocycles from Organocatalytic Enantioselective Desymmetrization of Resorcin[4]arenes
 
research article

C4-Symmetric Inherently Chiral Macrocycles from Organocatalytic Enantioselective Desymmetrization of Resorcin[4]arenes

Han, Hui
•
Wang, Xin Ge
•
Tong, Shuo
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2025
ACS Catalysis

Reported herein is the synthesis of C4-symmetric chiral resorcin[4]arene macrocycles by a catalytic enantioselective multicomponent reaction. Using (S)-piperidine-2-carboxamide-derived N,N′-dioxide as a chiral organocatalyst, the desymmetrization of resorcin[4]arenes via a 4-fold Mannich/cyclization reaction produced C4-symmetric (Pic)-resorcin[4]arene derivatives in 30%-47% yields with enantiomeric excess (ee) values up to 99%. This one-pot process generated 16 chemical bands in a single operation. The utility of the method was demonstrated by the conversion of the resulting products into functionalized chiral resorcin[4]arenes, which were able to catalyze the asymmetric addition of dialkylzinc to benzaldehydes.

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