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Постійне посилання колекціїhttps://dspace.nuft.edu.ua/handle/123456789/7497
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Документ One-Pot Synthesis of B-Ring ortho-Hydroxylated Homoisoflavonoids(2019) Myshko, Nataliia; Bondarenko, Svetlana; Mrug, Galyna; Sviripa, Vitaliy; Frasinyuk, MihayloA reliable method for the synthesis of B-ring hydroxylated homoisoflavonoids and 3-hetarylmethyl chromones has been developed. The method involves an initial oxa-Diels-Alder reaction of ortho-quinone methides generated from aryl/hetaryl-substituted ortho-(N,N-dimethylaminomethyl)phenols with (2E)-3-(N,N-dimethylamino)-1-(2-hydroxyphenyl)-prop-2-en-1-ones and the subsequent cascade of reactions. This synthetic strategy avoids conventional multistep protocols and does not require the protection of hydroxyl groups, thus allowing the facile synthesis of a library of various aromatic and heterocyclic analogs of naturally occurring homoisoflavonoidsДокумент Synthesis of 2H,10H-pyrano[2,3-f]chromen-2,10-diones and coumarinpyrazole or coumarin-pyrimidine hybrids based on them(2023) Myshko, Nataliia; Mrug, Galyna; Bondarenko, Svetlana; Frasinyuk, MihayloIn the oxa-Diels–Alder reaction of 8-[(2E)-3-(dimethylamino)prop-2-enoyl]-7-hydroxy-2H-chromen-2-one with thermally generated ortho-quinone methides from 2-(N,N-dimethylaminomethyl)phenols and the subsequent cascade of reactions were obtained 2H,10H-pyrano[2,3-f]chromen-2,10-diones. The synthesis of pyrazole–7-hydroxycoumarin hybrids was performed by recyclization of pyranochromone core under hydrazine actions. Reaction of 2H,10H-pyrano[2,3-f]chromen-2,10-diones with guanidine hydrochloride or related N,N-disubstituted derivatives as 1,3-bidentate nucleophiles affords amino-, dimethylamino-, 1-piperidino-, and 4-morpholino substituted pyrimidine-coumarin hybrids