The organotin derivatives corresponding to the equilibrium imine—enamine have been obtained by two different routes: ( 1) reaction of organotin enolates with stannazane; ( 2) reaction of tributyltin chloride with a magnesium derivative of imine. The first method allows the preparation of the less...
As with imine formation, the reaction is anequilibrium, but removal of water through distillation, or by using a dessicant such as molecular sieves (TiCl4if you’re hard-core) helps to drive the reaction towards the final enamine product. Here is a specific example of enamine formation purely...
304 An enamine is essentially a nitrogen enolate, and it can react with alkyl halides (e.g., iodomethane) to give an equilibrium mixture of the iminium salt (368) and the alkylated enamine (369).302 Hydrolysis with aqueous acid led to loss of pyrrolidine and formation of 2-methyl...
This compound is deprotonated to the imine 5b or the enamine 5c but an equilibrium exists between both species. Questo composto viene deprotonato a immina 5b o enammina 5c, in equilibrio fra di loro. WikiMatrix The two reactants (imine and enamine) line up for the Mannich reaction ...
(1995), ChemInform Abstract: Substituent Effects on the Tautomer Ratios Between the Hydrazone Imine and Diazenyl Enamine Forms in 3-(Arylhydrazono)methyl-2-oxo-1,2- dihydroquinoxalines. Correlation of the Hammett Constants σp with the Tautomeric Equilibrium Constants KT. ChemInform, 26: no. doi...
4-diazepinesThe tautomeric structure of 4-trifluoromethyl[b]benzo-1,4-diazepine system in solution has been evaluated by means of the calculation of 15N NMR chemical shifts of individual tautomers in comparison with the averaged experimental shifts to show that the enamine–imine equilibrium is ...
5- Aryl -substituted 4,7(6,7)-dihydro-1,2,4-triazolo[1,5-a]pyrimidines were obtained by condensation of 3-amino-1,2,4-triazole with 螔-dimethylaminopropiophenone hydrochlorides or crotophenone. The effect of steric and electronic factors on the position of the imine-enamine equilibrium in...
Imine-enamine tautomerism of dihydroazolopyrimidines 5. Steric effects and the tautomeric equilibrium for dihydro-1,2,4-triazolo[1,5-a]pyrimidinesThe reaction of 3-amino-1,2,4-triazole with 尾-dimethylaminopropiophenones or unsaturated ketones gives 5,7-disubstituted 4,7(6,7)-dihydro-1,2,4...
This compound is deprotonated to the imine 5b or the enamine 5c but an equilibrium exists between both species. Questo composto viene deprotonato a immina 5b o enammina 5c, in equilibrio fra di loro. WikiMatrix The two reactants (imine and enamine) line up for the Mannich reaction ...
Herein the reduction of the enamine function in 伪-acetylaminoacrylate derivatives is discussed from this point of view and the influence of the enamine imine equilibrium is discussed.doi:10.1016/S0040-4020(01)89323-6Corine LeroyGeorges Dupas...