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
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
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
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
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
The addition of 2-diazopropane (DAP) on β-trifluoromethylated acroleines led to cyclopropanes in a mixture of diastereoisomers.
E. Zouaoui, A. Khemiss, M. M. El Gaied
2-diazopropane, Δ1-pyrazoline, trifluromethylated cyclopropane
Pages 1445-1450
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
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
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