Sequence-controlled quadruple [2+2+2] cycloadditions, followed by onward Scholl reactions, enable the enantioselective synthesis of a giant π-extended carbo[17]helicene from a dodecayne substrate. This Ni-catalysed process forms a chiral nanocarbon that exhibits strong circularly polarized luminescence.
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Morita et al. (2026) studied this question.
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