REARRANGEMENT OF 3-CYANO-5 H -CHROMENO[2,3- b ]PYRIDINES TO 1,6-NAPHTHYRIDINE DERIVATIVES
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DOI: 10.1007/3991
Abstract: В сообщении описана перегруппировка замещенных 5 H -хромено[2,3- b ]пиридинов в оснoвной среде. В результате реализации механизма ANRORC и вращения пиридинового цикла происходит образование производных 1,6-нафтиридина с высокими выходами. read more here.
Keywords: pyridines naphthyridine; rearrangement cyano; chromeno pyridines; naphthyridine derivatives ... See more keywords
Furo[2,3-h]Chromones and Pyrano[2′,3′:5,6]Chromeno [4,3-B]Pyridines Based on Natural Isoflavones
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DOI: 10.1007/s10600-018-2556-z
Abstract: Furo[2,3-h]chromone and pyrano[2′,3′:5,6]chromeno[4,3-b]pyridine derivatives were synthesized from 7-hydroxy-8-formylisoflavones, which were prepared from natural isoflavones using a Duff reaction, via reactions with bromoacetophenones and ethyl 3-aminocrotonate, respectively. read more here.
Keywords: pyrano chromeno; chromeno pyridines; natural isoflavones; chromones pyrano ... See more keywords
An efficient approach for the synthesis of 5-hydroxy-chromeno[2,3-b]pyridines under catalyst and solvent free conditions
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DOI: 10.1039/c7gc01463e
Abstract: An efficient and sustainable method has been developed for the synthesis of novel 5-hydroxy-chromeno[2,3-b]pyridines by the reaction of 3-formylchromone, aromatic amines and malononitrile under catalyst and solvent-free conditions by simply stirring the components magnetically or… read more here.
Keywords: free conditions; catalyst solvent; chromeno pyridines; solvent free ... See more keywords
Oxidative Cyclization of 5H-Chromeno[2,3-b]pyridines to Benzo[b]chromeno[4,3,2-de][1,6]naphthyridines, Their NMR Study and Computer Evaluation as Material for LED
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DOI: 10.3390/molecules27134156
Abstract: Oxidative cyclization is one of the most significant reactions in organic synthesis. Naphthyridine derivatives are often used as luminescence materials in molecular recognition because of their rigid planar structure and as new drugs. Organic light-emitting… read more here.
Keywords: chromeno naphthyridines; chromeno; benzo chromeno; oxidative cyclization ... See more keywords
One-Pot Solvent-Involved Synthesis of 5-O-Substituted 5H-Chromeno[2,3-b]pyridines
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DOI: 10.3390/molecules28010064
Abstract: Chromeno[2,3-b]pyridines are substances demanded in medicinal and material chemistry. PASE (pot, atom, and step economy) and in particular one-pot approaches are key green chemistry techniques that are applied for the synthesis of heterocyclic compounds. In… read more here.
Keywords: chemistry; synthesis; one pot; solvent ... See more keywords