Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume -, Issue -, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202300481
Keywords
Axial Chirality; Chiral Phosphoric Acid; Electrophilic Aromatic Amination; Enantioselective Desymmetrization; Organocatalysis
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In this study, a highly efficient catalytic asymmetric synthesis of diaryl ether atropisomers was reported via an organocatalyzed enantioselective desymmetrization protocol. The chiral phosphoric acid-catalyzed asymmetric electrophilic aromatic aminations of symmetrical substrates provided a series of diaryl ether atropisomers with excellent yields and enantioselectivities. The utilization of the 1,2-benzenediamine moiety in the products allowed for the facile construction of heterocycles, leading to a wide range of structurally diverse and novel azaarene-containing diaryl ether atropisomers.
Axially chiral diaryl ethers are a type of unique atropisomers bearing two potential axes, which have potential applications in a variety of research fields. However, the catalytic enantioselective synthesis of these diaryl ether atropisomers is largely underexplored when compared to the catalytic asymmetric synthesis of biaryl or other types of atropisomers. Herein, we report a highly efficient catalytic asymmetric synthesis of diaryl ether atropisomers through an organocatalyzed enantioselective desymmetrization protocol. The chiral phosphoric acid-catalyzed asymmetric electrophilic aromatic aminations of the symmetrical 1,3-benzenediamine type substrates afforded a series of diaryl ether atropisomers in excellent yields and enantioselectivities. The facile construction of heterocycles by the utilizations of the 1,2-benzenediamine moiety in the products provided access to a variety of structurally diverse and novel azaarene-containing diaryl ether atropisomers.
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