Aminonitrone-N-hydroxyaminoimine tautomeric equilibrium in the series of 1-hydroxy-2-imidazolines
摘要:
A series of 2-substituted 1-hydroxy-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazoles have been synthesized. Various effects on the state of the aminonitrone-N-hydroxyaminoimine tautomeric equilibrium, including solvent effects and substituent effect in the 2 position of heterocycle, have been studied. (C) 2004 Elsevier B.V. All rights reserved.
Aminonitrone-N-hydroxyaminoimine tautomeric equilibrium in the series of 1-hydroxy-2-imidazolines
摘要:
A series of 2-substituted 1-hydroxy-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazoles have been synthesized. Various effects on the state of the aminonitrone-N-hydroxyaminoimine tautomeric equilibrium, including solvent effects and substituent effect in the 2 position of heterocycle, have been studied. (C) 2004 Elsevier B.V. All rights reserved.
1,3-Dipolar cycloaddition or nucleophilic addition: Influence of solvents and nature of substituents in the reagent and substrate molecules on the reaction of 4,5-dihydro-1<i>H</i>-imidazole 3-oxides with alkynes
作者:Sergey A. Popov、Vladimir A. Reznikov
DOI:10.1002/jhet.5570430207
日期:2006.3
Two competitive processes - 1,3-dipolarcycloaddition and nucleophilic addition - in the reaction of 4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole 3-oxides with asymmetrically substituted alkynes were shown to occur. The influence of solvents and the nature of substituents in the reagent and substrate molecules on the rate ratio of these competitive processes were studied.