Khalid Bougrin

Nouvelle voie de synthèse des arylimidazoles sous irradiation micro-ondes en “milieu sec”

Abstract Arylimidazoles are prepared in good yields on solid mineral supports in “dry media” and under microwave irradiation in domestic ovens.

An easy route to synthesize 1,5-arylodiazepin-2-ones

A series of 1,5-arylodiazepin-2-ones is prepared by the condensation of the appropriate o-β-arylenediamines with β-ketoesters in xylene under microwave irradiation. The reaction time is shortened to 10 mn, and the products are obtained in high yields. No by products are observed. Specific effects of microwaves are evidenced as no reaction occurs by classical heating in the same conditions.

Addition dipolaire-1,3 des arylnitriloxydes avec quelques dipolarophiles olèfiniques sur alumine en milieu sec et sous micro-ondes

Abstract Isoxazolines are prepared in good yields on solid mineral support in “dry media” and under microwave irradiation in domestic ovens.

Synthèse “one pot”de dérivés isoxazoliniques par activation sonochimique

Abstract Several isoxazolines are prepared in biphasic system Ca ( OCl 2 ) CH 2 Cl 2 or NaOCl CH 2 Cl 2 . Yields are increased under sonication when compared to classical stirring in the same conditions.

Synthèse de nouvelles spiro-rhodanine-pyrazolines par addition dipolaire-1,3 de la diphe′nylnitrilimine sur quelques 5-arylidènerhodanines en ‘milieu sec’ et sous irradiation micro-onde

Nous de′crivons la synthese de nouvelles spiro-rhodanine-pyrazolines par addition dipolaire-1,3 de la diphe′nylnitrilimine sur alumine en milieu sec sous irradiation micro-onde avec les 5-arylidenerhodanines. Ces dernieres sont e′galement pre′pare′es via une me′thode plus ge′ne′rale par condensation des de′rive′s de la rhodanine avec les alde′hydes sur alumine ou montmorillonite KSF sans solvant sous champ micro-onde. Les re′actions sont largement favorise′es sur support inorganiques et les effets thermiques des micro-ondes sont mis en e′vidence par comparaison avec le chauffage conventionnel. Synthesis of new spiro-rhodanine-pyrazolines from the 1,3-dipolar addition of diphenylnitrilimine to some 5-arylidenerhodanines on solid inorganic supports in ‘dry media’ and under microwave irradiation. We describe the synthesis of new spiro-rhodanine-pyrazolines from the 1,3-dipolar addition of diphenylnitrilimine to some 5-arylidenerhodanines on solid inorganic supports in ‘dry media’ and under microwave irradiation. The 5-arylidenerhodanines are prepared by the condensation of derivatised rhodanines with aldehydes on alumina or montmorillonite KSF support without solvent under microwave irradiation. Thermal effects of microwaves are displayed by comparison with classical heating.

Conversion des cis- et trans-pyrazolines en pyrazoles sur support minéral imprégné de nitrate ferrique ou cuivrique

Abstract Pyrazoles are prepared from cis and trans-pyrazolines with good yield in dichloromethane under mild reaction conditions using the inexpensive clay-supported iron (III) nitrate “Clayfen” or copper (II) nitrate “ Claycop”.

Synthèse ‘one-pot’ de quelques de′rive′s pyrazoliniques et pyrazoliques en 'milieu sec’ et sous irradiation micro-onde

Les pyrazolines ou pyrazoles sont pre′pare′s en une seule e′tape sur support solide mine′ral en ‘milieu sec’ et sous irradiation micro-onde dans un four domestique. ‘One-pot’ synthesis of some pyrazolines and pyrazoles in ‘dry media’ under microwave irradiation. Pyrazolines or pyrazoles are prepared in a single step in good yields on a solid mineral support in ‘dry media’ and under microwave irradiation in a domestic oven.