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Semenova, Irina Ð; Osyanin, Vitaly Ð; Osipov, Dmitry V; Klimochkin, Yuri N
Chemistry of heterocyclic compounds (New York, N.Y. 1965), 11/2022, Volume: 58, Issue: 11Journal Article
A three-component condensation of alpha-naphthol, aromatic aldehydes, and beta-enaminones in acetic acid under reflux led to beta-carbonylsubstituted (with respect to the pyran oxygen atom) 4-aryl-4H-benzohchromenes. The reaction is a cascade process involving the generation of 1,2-naphthoquinone-2-methide, the Diels-Alder reaction involving push-pull beta-enaminone, and the subsequent elimination of a secondary amine.
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