Ring-Expansion Strategy for α-Aryl Azahelicene Construction: Building Blocks for Optoelectronic Materials.
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DOI: 10.1021/acs.orglett.1c03070
Abstract: An acid-mediated rapid synthesis of α-aryl azahelicenes via C-C bond cleavage of helical 9H-fluoren-9-ols is reported. The newly introduced aryl ring and pyridine moieties provide an excellent opportunity to further tune the properties of azahelicences:… read more here.
Keywords: ring expansion; expansion strategy; azahelicene construction; aryl azahelicene ... See more keywords