Cobalt supported on alumina as green catalyst for Biginelli reaction in mild conditions: effect of catalyst preparation method

Green Processing and Synthesis

Tassadit Mazari¹  Menad Saliha²  Halouane Mourad²  Bennini Leila²  Tezkratt Said²  Khiar Chahinaz²  Rabia Chérifa³  Benito González Manuel Jesús⁴ 

[1] Faculté des sciences, Département de Chimie, Université M. Mammeri Tizi-Ouzou, 15000, Algeria;Laboratoire de Chimie Appliqué et du Génie Chimique, Faculté des Sciences, Université M. Mammeri Tizi-Ouzou, 15000, Algeria;Laboratoire de Chimie du Gaz Naturel, Faculté de Chimie, Université de Science et Technologie Houari Boumediene, 16000, Alger, Algeria;Unidad de Valorización Energética de Combustibles y Residuos, División de Combustión y Gasificación, Departamento de Energía, CIEMAT, Despacho 17, Plta 2a Edificio 20, Av. Complutense, 40, 28040 Madrid, Spain;

关键词: alumina support;    biginelli reaction;    catalysis;    cobalt materials;    dihydropyrimidinones;    green chemistry;   

DOI  :  10.1515/gps-2016-0149

来源: DOAJ

【 摘 要 】

Cobalt supported on alumina (10 wt% Co/Al2O3) was synthesized by three different methods; sol-gel (SG), microemulsion (ME) and impregnation (IMP). The materials were characterized by the Brunauer-Emmett-Teller (BET) method, X-ray diffraction (XRD), X-ray fluorescence, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis. Their catalytic activity was investigated toward the formation of Biginelli reaction products, 3,4-dihydropyrimidin(1H)-ones (DHPMs). The catalysts were found to be efficient for this reaction with yields between 50% and 71% and can be reused without great loss of efficiency. Among the catalytic systems, that prepared by the SG method is the most active with 71% of DHPMs yield under solvent free conditions at 100°C for 1 h of reaction time.

【 授权许可】

Unknown