4-HYDROXYCOUMARINS AS MICHAEL DONORS IN ASYMMETRIC ROUTES TO POLYCYCLIC COUMARINS (MICROREVIEW)
DOI:
https://doi.org/10.1007/4499Ключевые слова:
4-hydroxycoumarins, fused coumarins, asymmetric synthesis, Michael addition.Аннотация
Different [3,4]-fused polycyclic 2H-chromen-2-ones can be prepared in a stereoselective fashion starting from 4-hydroxycoumarins as nucleophilic synthones. Herein we report a brief overview of the most recent methods including Pd-catalyzed [3+3] annulation processes, organocatalytic one-pot and domino Michael addition/cyclization, tandem conjugate addition/hydroxyalkylation, and organocascade catalytic reaction.
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Опубликован
2018-06-04
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Гетероциклы в фокусе