JOURNAL of the Tunisian Chemical Society

serving the Research, the Education and the Industry

Cycloaddition dipolaire-1,3: Etude de la régiosélectivité des nitrilimines disubstituées et des arylnitriloxydes avec l’isochromène

Written by sctunisie no comments

We report in this paper the study of 1,3-dipolar cycloaddition reaction of diarylnitrilimines, C-methylarylnitrilimines and arylnitriloxides with isochromene. The regioselectivity of the reaction is established by the 1H and 13C NMR parameters and chemical process.

A. Sebban, A. Bahloul, M. Berrada, S. Kitane,K. Bougrin, M. Soufiaoui

1,3-Dipolar cycloaddition, regioselectivity, diarylnitrilimines, arylnitriloxides, isochromene

Pages 1403-1409

Utilisation d'un dérivé dicyané de l’isophorone dans la synthèse des aminoindazoles et amino (imino) oxindazoles

Written by sctunisie no comments

A new method of some aminohydroindazoles and aminohydrooxindazoles derivatives synthesis is described. Thus reaction of hydrazines, hydrazides and hydroxylamines with 2,3-dicyano-3,5,5-trimethylcyclohexan-one 2 gave aminohydroindazoles 3, 4, 6, 7 and amino (imino) hydrooxindazoles 8, 10. Opened intermedairs 5 were isolated.

N. Rachiqi, S. Fkih-Tetouani, A. El Louzi

Pages 1411-1418

Flavanones isolées de Ricinus communis L. ( euphorbiacées)

Written by sctunisie no comments

Two flavanones have been isolated from the pericarps of Ricinus communis (Euphorbiaceae). By means of spectroscopic methods their structures, were established as naringenin 7-O-(3"-p-coumaroylglucoside) and naringenin 7-O-(3",6"-di-p-coumarylglucoside).

A. Bahroun, N. Ben Ameur, M. Damak

Ricinus communis, Euphorbiaceae, Flavanone, Naringenin 7-O-(3"-p-coumaroylglucoside), Naringenin 7-O-(3",6"-di-p-coumarylglucoside)

Pages 1427-1431

Synthèse de nouveaux amino dibenzohétéroazépines carbonitriles à partir de 2,3-dicyanocyclohexanone

Written by sctunisie no comments

New amino dibenzoheteroazepine carbonitriles have been synthesized by condensation of 1,5,5-trimethyl-3-oxocyclohexane-1,2-dicarbonitrile, an isophorone derivative, with the o-phenylenediamine and its analogs. Several conditions have been used to optimize the yields. The activation of the reaction by irradiation microwaves proved to be very efficient. It led to shorter times of the reaction and to rate enhancements. Moreover, the purity of the products was increased.

N. Rachiqi, S. Fkih-Tetouani, A. El Louzi

Pages 1433-1437

Synthèse de nouveaux macrocycles derivés de la quinoxaline-2,3-dione

Written by sctunisie no comments

During the condensation between quinoxaline-2,3-dione and dichlorotriethylene glycol, using phase transfer catalysis, new macrocycles which contain two subcyclic units quinoxaline within polyether chain have been isolated.

S. Ferfra, N.H. Ahabchane, E.M. Essassi

quinoxaline, dichlorothethyleneglycol, phase transfert

Pages 1439-1444

Synthèse de 2-amino-4-(phosphonom.thyl)cycloalcanethiophènes

Written by sctunisie no comments

The reaction of 2-(phosphonomethyl)cycloalcanones 1 with malonic derivatives and sulfur in basic conditions, leads to 2-amino-4-(phosphonomethyl)cycloalcanethiophenes 2. Two diastereomers were obtained in some cases.

H. Zantour, S. Touil, M. Ben Messaouda

2-amino-4(phosphonomethyl)cycloalcanethiophenes, 2-(phosphonomethyl)-cycloalcanones

Pages 1451-1457

Réduction électrochimique des N-(2-halogénophényl) imidates

Written by sctunisie no comments

Cathodic reduction of several N-(2-halogenophenyl)imidates of a typical structure (Scheme 1) has been investigated by cyclic voltammetry and controlled potential electrolysis at mercury electrode in aprotic solvent. Quantitative results for preparative electrolysis show the occurrence of reductive cleavage of the carbon-halogen bond leading to the formation of N-phenyliminoether in good yields. For all the investigated compounds values of the kinetic solution electron transfer are calculated since the determination of the current catalytic values from redox catalysis experiments.

B. Haouas, N. Adhoum, M. L. Benkhoud, K. Boujlel

Imidates, cyclic vohammetry, redox catalysis, rate constant of solution, electron transfer

Pages 1471-1478

Rss feed of the category