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...
30. Peptides and Proteins(239) 31. Catalysis in Organic Reactions(158) 32. Lipids (194) 33. The Organic Chemistry of Metabolic Pathways(272) 34. Nucleic Acids(138) 35. Transition Metals(337) 36. Synthetic Polymers(250)21. Aldehydes and Ketones: Nucleophilic Addition Imine vs ...
This compound is deprotonated to the imine 5b or theenamine5c but an equilibrium exists between both species. Questo composto viene deprotonato a immina 5b oenammina5c, in equilibrio fra di loro. WikiMatrix The two reactants (imine andenamine) line up for the Mannich reaction with Si facia...
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...
(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...
Theenamine-imine tautomerism may be considered analogous to the keto-enol tautomerism. WikiMatrix The Thorpe reaction is a chemical reaction described as a self-condensation of aliphatic nitriles catalyzed by base to formenamines. WikiMatrix
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...
Resolved dynamically: A new, expedient protocol has been developed for the asymmetric synthesis of 3- and 2,3-amino acid derivatives from enamine precursors (see scheme). The method relies on a fast equilibrium between the enamine and imine forms. Reduction of the imine with Cl3SiH, catalyzed...
Using PMR spectroscopy, we have demonstrated the existence of an imine-enamine tautomerism and optically active forms in tropanone Schiff's bases. We have studied the effect of solvents and substituents on the tautomeric equilibrium of the system. By reaction with acid chlorides, we obtain the N...
This compound is deprotonated to the imine 5b or theenamine5c but an equilibrium exists between both species. Questo composto viene deprotonato a immina 5b oenammina5c, in equilibrio fra di loro. WikiMatrix The two reactants (imine andenamine) line up for the Mannich reaction with Si facia...