Наукові праці. Кафедра медичної та біоорганічної хімії
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Browsing Наукові праці. Кафедра медичної та біоорганічної хімії by Subject "1,2,4-oxadiazole"
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Item Isomeric 3-isoxadiazolylcoumarins and their derivatives(Wiley, 2012) Detistov, Oleksandr; Orlov, V.; Zhuravel`, I.Here we represent preparative methods of synthesis of isomeric 3-isoxadiazolylcoumarins and their derivatives. Two new synthetic methods have been developed for 3-[1,2,4-oxadiazol-5-yl]coumarins I. The first method is based on a three-component condensation of coumarin-3-carboxylic acids, CDI and amidoximes. The second method essentially uses the interaction of 5-cyanomethyl-1,2,4-oxadiazoles with salicylic aldehydes. General approach for preparation of 3-[1,2,4-oxadiazol-3-yl]coumarins II has been worked out. Moreover, above mentioned synthetic ways open the way for the synthesis of 2-iminoderivatives III and IV not described before, those were diversified by reaction of nucliophilic substitution of 2-imino group with a numerous amino compounds.Item Polycyclic systems containing 1,2,4-oxadiazole ring 2. 4-(1,2,4-oxadiazol-5-yl)pirrolidin-2-ones: synthesis and prediction of biological activity(Springer, 2008) Kharchenko, Juliya; Detistov, Oleksandr; Orlov, V.A one-pot synthesis of 5-oxopyrrolidine-3-carboxylic acids, carbonyldiimidazole, and benzamidoximes leads to the formation of the novel 4-(1,2,4-oxadiazol-5-yl)pyrrolidin-2-one bicyclic systems, the structures of which have been confirmed by IR and 1H NMR methods and by liquid chromato-mass spectrometry.Item Synthesis of Substituted 5-(1,2,4-Oxadiazol-5-yl)-3,4- dihydropyrimidine-2(1H)-thiones(American Chemical Society, 2009) Kharchenko, Juliya; Detistov, Oleksandr; Orlov, ValeriyWe have developed a liquid-phase route for combinatorial synthesis of novel substituted 5-(1,2,4-oxadiazol-5-yl)-3,4 dihydropyrimidine-2(1H)-thiones. Biginelli-type three-component condensation of 1-(3 aryl-1,2,4-oxadiazol-5-yl)acetones, thiourea, and benzaldehydes is shown to result in new 5-(1,2,4-oxadiazol-5-yl)-3,4-dihydropyrimidine-2(1H)-thione heterocyclic system. If salicylaldehydes are used in this reaction, a mixture of 5-(1,2,4-oxadiazol-5-yl)-3,4-dihydropyrimidine-2(1H)-thiones and 11-(1,2,4-oxadiazol-5-yl)-2,3,5,6-tetrahydro-4H-2,6-methano-1,3,5-benzoxadiazocine-4-thiones is formed.