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Novel Synthesis of 3,3-Bis-(4-chromone-3-ylmethyl)-chroman-4-ones

Autor: Shanmugasundaram Bhagavathy, Krishnan Devarajan, Kalpattu K. Balasubramanian

Publikováno v: Synthetic Communications. 43:2165-2170

3-Hydroxymethylchromones have been found to undergo a novel transformation in the presence of Cs2CO3 in toluene or xylene as solvent to afford “trimeric” chromones, 3,3-bis-(4-chromone-3-ylmethyl)-chroman-4-ones. The structure of the trimer has a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f89e74549addbae8fb106c59cf7671c0
https://doi.org/10.1080/00397911.2012.691594

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Electrochemical Oxidation Mechanisms of the Antioxidants Daidzein and 7-Hydroxy-4-chromone

Autor: Saeed Shahrokhian, Ana Maria Oliveira-Brett, Isabel P.G. Fernandes, Masoumeh Ghalkhani, Severino Carlos B. Oliveira

Publikováno v: Electroanalysis. 24:618-626

The electrochemical behavior of antioxidants daidzein (DZ) and 7-hydroxy-4-chromone (7-OH-4-CHM) was investigated. The oxidation of DZ is irreversible, pH-dependent, and occurs in two steps, the first of 4’-OH on the B-ring and the second on the 7-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::01733259f18078fe34007729ddcbead2
https://doi.org/10.1002/elan.201100629

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ChemInform Abstract: Novel Synthesis of 3,3-Bis-(4-chromone-3-ylmethyl)-chroman-4-ones

Autor: Krishnan Devarajan, Kalpattu K. Balasubramanian, Shanmugasundaram Bhagavathy

Publikováno v: ChemInform. 44

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ba77f7ba0dc8502eb6139789c9e55a6
https://doi.org/10.1002/chin.201343142

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Studies on the reactivity and structure of phenyl 7-fluoro-4-chromone-3-sulfonate

Autor: Peter Luger, Genivaldo Perpetuo, Werner Löwe, Susan Bischoff, Manuela Weber

Publikováno v: Journal of Heterocyclic Chemistry. 32:249-254

The new, fluorinated benzoxathiinopyrazole 4 and the hitherto unknown fluorinated benzoxathiinodihydropyridine 5 can be produced by reacting the title compound 1 with cyanoacetic hydrazide (3) in the presence of sodium acetate. The structures of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::94f0a9a7053c554a387c48dfa1b4651b
https://doi.org/10.1002/jhet.5570320142

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Unusual ring transformations: Reaction of phenyl 7-fluoro-4-chromone-3-sulfonate with methyl 3-oxo-pentanoate in the presence of ammonium acetate

Autor: Susan Schott, Werner Löwe

Publikováno v: Journal of Heterocyclic Chemistry. 31:405-408

The novel benzoxathiinopyridines (4) and (5), the hitherto unknown di- benzopyrone (6) and the heterocyclic enaminone (7) have been synthesi- zed by ring transformations of phenyl 7-fluoro-4-chromone-3-sulfonate (1) with methyl 3-oxopentanoate (2) in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ec8fe809ae6251ca558c40fc2a3d910
https://doi.org/10.1002/jhet.5570310227

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