Three pairs of planar chiral heteroarenes were synthesized using palladium-catalyzed Buchwald-Hartwig coupling and hypervalent iodine-mediated oxidative cyclization from optically pure 4-amino[2.2]paracyclophane. Among them, an enantiomer of planar chiral azahelicene was found to have circularly polarized luminescence activity that was remarkably stronger than that of planar chiral heteroarenes.
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| http://dx.doi.org/10.1021/acs.orglett.1c03325 | DOI Listing |
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