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A highly enantioselective synthesis of 5,13‐disubstituted dibenzo[d,d′]benzo[1,2‐b:4,3‐b′]dithiophenes is reported. Key for the successful assembly of these helical architectures is the last two successive Au‐catalyzed intramolecular alkyne hydroarylation events. Specifically, the second cyclization is the enantiodetermining step of the whole process and provides the desired helicenes with excellent...
A highly enantioselective synthesis of 5,13‐disubstituted dibenzo[d,d′]benzo[1,2‐b:4,3‐b′]dithiophenes is reported. Key for the successful assembly of these helical architectures is the last two successive Au‐catalyzed intramolecular alkyne hydroarylation events. Specifically, the second cyclization is the enantiodetermining step of the whole process and provides the desired helicenes with excellent...
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