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- W4241639650 abstract "Abstract A highly enantioselective synthesis of 1,12‐disubstituted [4]carbohelicenes is reported. The key step for the developed synthetic route is a Au‐catalyzed intramolecular alkyne hydroarylation, which is achieved with good to excellent regio‐ and enantioselectivity by employing TADDOL‐derived (TADDOL=α,α,α,α‐tetraaryl‐1,3‐dioxolane‐4,5‐dimethanol) α‐cationic phosphonites as ancillary ligands. Moreover, an appropriate design of the substrate makes the assembly of [4]helicenes of different substitution patterns possible, thus demonstrating the synthetic utility of the method. The absolute stereochemistry of the newly prepared structures was determined by X‐ray crystallography and characterization of their photophysical properties is also reported." @default.
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- W4241639650 date "2020-02-20" @default.
- W4241639650 modified "2023-10-18" @default.
- W4241639650 title "Enantioselective Synthesis of 1,12‐Disubstituted [4]Helicenes" @default.
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- W4241639650 doi "https://doi.org/10.1002/ange.201915870" @default.
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