Convenient synthesis of 1,6,7,8‐substituted 2‐(3′,4′‐substituted‐phenyl)‐4‐quinolones <i>via</i> a 4‐ethoxyflavylium salt
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説明
<jats:title>Abstract</jats:title><jats:p>Condensation of 2‐hydroxyacetophenone with benzaldehyde in the presence of 70% perchloric acid in ethyl orthoformate gave the corresponding 4‐ethoxyflavylium perchlorate, which was treated with aqueous ammonia or methylamine solution to afford 1,6,7,8‐substituted 2‐(3′,4′‐substituted‐phenyl)‐4‐quinolone in fair to good yield.</jats:p>
収録刊行物
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- Journal of Heterocyclic Chemistry
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Journal of Heterocyclic Chemistry 36 1189-1193, 1999-09-01
Wiley