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Reaction of β-arylidennaphthylamines with 4-hydroxycoumarin. A correction in structural assignment of the product. III
Contribution No. 998 from Instituto de Quimica, UNAM.
Abstract
The reaction of 4-hydroxycoumarin with β-arylidennaphthylamines constitutes a convenient synthetic route to the hitherto unknown 2H-benzo[f][1]benzopyrano[4,3-b]quinolin-2-one, VI. The X-ray crystallography data conform with the present benzopyrano[4,3-b]quinolin-2-one ring system and disprove the benzopyrano[3,4-c]quinolin-2-one structure previously assigned for such reaction products.
