Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Dušan Ilavský"'
Publikováno v:
Magnetic Resonance in Chemistry. 36:681-684
A series of 14 3-substituted 4-oxoquinolones with or without a substituent (methyl, ethyl) in position 1 were prepared. Literature and measured data were used to study the influence of the substituent on the shifts of carbon atoms of these compounds,
Autor:
Dušan Ilavský, Katarína Heleyová
Publikováno v:
Collection of Czechoslovak Chemical Communications. 62:99-108
Nucleophilic reaction of 5-amino- (1) and 6-amino-2-substituted benzoxazoles (2) with 3-ethoxy-2-cyanopropenonitrile (3) afforded the respective benzoxazolylaminomethylenemalononitriles 5 and 6. The amino derivatives 1 and 2 reacted with ethyl 3-etho
Publikováno v:
Collection of Czechoslovak Chemical Communications. 61:268-275
Reaction of 2-substituted 5- and 6-aminobenzoxazoles 1 and 2 with diethyl ethoxymethylenemalonate afforded the corresponding diethyl 3-N-(5- and 6-benzoxazolyl)aminomethylenemalonates 3 and 4. Under conditions of the Gould-Jacobs reaction, the compou
Publikováno v:
Collection of Czechoslovak Chemical Communications. 61:371-380
Nucleophilic reaction of 5-amino- and 6-amino-2-substituted benzoxazoles 1 and 2 with 3-ethoxymethylene-2,4-pentanedione (3) gave compounds 5 and 6. Compounds 1 and 2 reacted with ethyl ethoxymethylene-3-oxobutanoate (4) under formation of compounds
Autor:
Dušan Ilavský, Viktor Milata
Publikováno v:
Collection of Czechoslovak Chemical Communications. 61:1233-1243
Unsymmetrically 3,5-disubstituted 4-(5-X-2-furyl)-2,6-dimethyl-1,4-dihydropyridines (where X = H, Br, NO2) have been synthesized and characterized by spectral methods (IR, UV, 1H NMR and MS). The modified Hantzsch method made it possible to prepare t
Autor:
Viktor Milata, Dušan Ilavský
Publikováno v:
Chemistry of Heterocyclic Compounds. 31:1213-1216
Publikováno v:
Collection of Czechoslovak Chemical Communications. 60:605-611
Condensation reactions of 1,2,3,4-tetrahydro-6-methyl-2,4-dioxo-5-pyrimidinecarbaldehyde with nine acid derivatives containing an active methylene group are described. The obtained products were characterized by their IR, UV, 1H NMR, 13C NMR and mass
Publikováno v:
Collection of Czechoslovak Chemical Communications. 60:583-593
The Gould-Jacobs reaction of all position isomeric 2-aminonitrobenzothiazoles II with diethyl ethoxy- methylenemalonate has been studied. The structure of substitution (IV) and cyclization (VI) products and of the corresponding acids (VIII) was confi
Publikováno v:
Collection of Czechoslovak Chemical Communications. 59:1145-1152
Thermal cyclocondensation of starting ethyl (1-methyl-5- and 6-benzimidazolyl/benzotriazolyl)aminomethylenepropanedioates (Ia - Ie) in aprotic medium gives angularly condensed ethyl azolo[4,5-f]quinolonecarboxylates IIa, IIc, IIe and azolo[5,4-f]quin
Publikováno v:
Collection of Czechoslovak Chemical Communications. 59:1458-1462
Substituted 2-amino-3-cyano-4H-pyrans represent important precursors in syntheses of condensed heterocycles containing a 4H-pyran nucleus. In the context of studies of reactivity of 2-amino-5-acetyl-4-(5-X-2-furyl)-3-cyano-6-methyl-4H-pyrans we were