Pré-évaluation de la participation du Maroc à l’union monétaire de la CEDEAO

Le choix d’un pays de participer à une union monétaire constitue selon la théorie de la Zone Monétaire Optimal (ZMO), une décision pertinente si les différents participants remplissent un ensemble de critères avancés par cette théorie. Dans ce cadre, la pertinence d’une éventuelle décision du Maroc pour rejoindre la prévue union monétaire de la CEDEAO nécessite une subtilité d’analyse  afin de pouvoir évaluer le pré-positionnement  économique du Maroc  par rapport aux autres membres majeurs de la CEDEAO. Ainsi, notre article apporte quelques réflexions sur les avantages et limites sur cette possible participationà l’union monétaire de la CEDEAO en se basant sur les différentes relations qui existent entre le Maroc et quatre grandes économies de la CEDEAO à savoir : le Nigeria,  le Sénégal, le Ghana et la  côte d’ivoire

6-Bromo-1-(1,2-propadien­yl)-3-(2-propyn­yl)-1H-imidazo[4,5-b]pyridin-2(3H)-one

The reaction of propargyl bromide and 6-bromo-1,3-dihydro­imidazo[4,5-b]pyridin-2-one in refluxing dimethyl­formamide yields the title compound, C12H8BrN3O, which features nitro­gen-bound propadienyl and propynyl substituents. The imidazolopyridine fused ring is planar (r.m.s. deviation = 0.012 Å); the propadienyl chain is coplanar with the fused ring as it is conjugated with it, whereas the propynyl chain is not as the nitro­gen-bound C atom is a methyl­ene linkage. The acetyl­enic H atom is hydrogen bonded to the carbonyl O atom of an adjacent mol­ecule, forming a helical chain runnning along the b axis

6-Bromo-1,3-di-2-propynyl-1H-imidazo[4,5-b]pyridin-2(3H)-one

The room-temperature reaction of propargyl bromide and 6-bromo-1,3-dihydro­imidazo[4,5-b]pyridin-2-one in dimethyl­formamide yields the title compound, C12H8BrN3O, which features nitro­gen-bound propynyl substituents. The imidazopyridine fused ring is almost planar (r.m.s. deviation = 0.011 Å); the propynyl chains point in opposite directions relative to the fused ring. One acetyl­enic H atom is hydrogen bonded to the carbonyl O atom of an inversion-related mol­ecule, forming a dimer; adjacent dimers are linked by a second acetyl­ene–pyridine C—H⋯N inter­action, forming a layer motif

Synthesis and reactivity of new heterocyclic systems derived from 5-chloro-1H-indole-2,3-dione

In this article, we described the synthesis of various derivatives of 5-Chloroisatin by the action of halogenated mono channels, benzyl chloride and methyl iodide under the conditions of phase transfer catalysis (PTC), which are widely used as a starting material for the synthesis of heterocyclic compounds and as substrates for the synthesis of drugs. In order to multiply the family heterocyclic compound from 5-Chloro-1H-indole-2,3-dione using the N-alkylation reaction which is answered in the field of organic chemistry and on which several studies were performed. The various products were determined by 1H NMR, and 13C NMR spectroscopy with good yield

Study of the inhibition of corrosion of mild steel in a 1M HCl solution by a new quaternary ammonium surfactant

The anticorrosive effect of surfactant, 12-(2,3-dioxoindolin-1-yl)-N,N,N-trimethyldodecanammonium bromide 3 on the corrosion of mild steel in 1M hydrochloric acid was assessed by gravimetric and electrochemical techniques (potentiodynamic polarization and electrochemical impedance spectroscopy). The results have shown that our synthesized surfactant is an excellent corrosion inhibitor for mild steel in 1 M HCl. Inhibitory efficacy of up to 95.9% was exhibited by surfactant 3 at a concentration of 1 mM after 6 h immersion at 298K. Based on the polarization curves, it is clear that the surfactant 3 can be considered as a mixed inhibitor with a predominantly anodic character. The inhibitory effectiveness increases with increasing concentration but decreases with increasing temperature. It was found that the adsorption of the inhibitor on the surface of the mild steel in 1M HCl followed the Langmuir adsorption isotherm. In this context, the main kinetic and thermodynamic parameters were determined and discussed

SYNTHESIS OF NEW 5-BROMO-1H-INDOLE-2,3-DIONE DERIVATIVES BY 1,3-DIPOLAR CYCLOADDITION

To contribute to the development of the chemistry of 5-bromo-isatin, we have synthesized new heterocyclic systems, using alkylation reactions under conditions of phase transfer catalysis to be then subjected to cycloaddition reactions dipolar involving 1,3-dipoles. The structures of the various products obtained were determined by 1H NMR, 13C NMR spectroscopy