The synthesis of angular heteroarenochromones based on 7-hydroxy-8-carbonylchromones
DOI:
https://doi.org/10.17721/fujcV5I2P68-94Keywords:
8-formyl-7-hydroxychromones, 8-acetyl(benzoyl)-7-hydroxychromones, annulation, furo[2, 3-h]chromones, pyrano[2, 3-f]chromones, α-pyrono[2, γ-pyrono[2, fused pyrano[2, isoxazolo[7, 8-d]chromonesAbstract
The present review highlights advanced strategies to the synthesis of the chromones annulated with O- and N-containing heterocycles at C(7)-C(8) bond. Due to the prevalence of such motives in different kinds of natural flavonoids and some alkaloids, fused chromones have attracted a great deal of attention so far. On the other hand a wide range of biological activities is displayed by the compounds of this type both among naturally occurring flavonoids and their synthetic analogues. 8-Carbonyl-7-hydroxychromones proved to be versatile synthones for the synthesis of angular hetarenochromones via approach of annulation of a heterocycle to the chromone core. It also addresses the question of the biological activity of naturally occurring and fused synthetic hetarenochromones.
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