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An unprecedented cylcoisomerization of 1,3-dien-5-ynes for the construction of 7 H -benzo[7]annulenes through a transamidation/5- exo -trig cyclization/8π-electrocyclization has been reported. Mechanistic investigations were conducted via DFT calculation and experimentally support.
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Khosravi et al. (2022) studied this question.
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