Cu-Catalyzed decarboxylative annulation of N-substituted glycines with 3-formylchromones: synthesis of functionalized chromeno[2,3-b]pyrrol-4(1H)-ones.
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DOI: 10.1039/d2cc03816a
Abstract: A novel protocol was developed for preparing functionalized chromeno[2,3-b]pyrrol-4(1H)-ones 3 (CMPOs) from 3-formylchromones with N-substituted glycine derivatives. The method entailed decarboxylative annulation of the acyl group of 3-formylchromones by simply heating a mixture of substrates… read more here.
Keywords: decarboxylative annulation; chromeno pyrrol; functionalized chromeno; catalyzed decarboxylative ... See more keywords
Practical Synthesis of Functionalized Chromeno[3,4-c]pyridine Derivatives via a CuCl2-Catalyzed Tandem Reaction of the Blaise Reaction Intermediates and 3-Cyanocoumarins
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DOI: 10.1055/s-0036-1591535
Abstract: This work discloses a novel and eļ¬cient protocol for the construction of functionalized chromeno[3,4-c]pyridine derivatives from the Blaise reaction intermediates and 3-cyanocoumarins through a CuCl2-catalyzed sequential Michael addition/intramolecular cyclization/oxidative aromatization reaction. This new method shows… read more here.
Keywords: reaction intermediates; blaise reaction; functionalized chromeno; chromeno pyridine ... See more keywords